Sewage Treatment Plant

medium IMO Required 148 models total

A sewage treatment plant breaks down and disinfects blackwater from toilets and greywater from galleys before discharge, using biological digestion or electrochemical treatment, and is inspected under MARPOL Annex IV rather than the oil record book regime that governs bilge water.

Read more — Sewage Treatment Plant explained ▾

What defines a sewage treatment plant

A marine sewage treatment plant (STP) treats blackwater from toilets, and often greywater from galleys and laundries, to a standard that permits discharge closer to shore than untreated sewage would allow. It sits under a different regulatory regime from the oily water separator: MARPOL Annex IV governs sewage, with its own discharge distances, effluent standards and survey cycle, separate from the Annex I rules that cover oil in bilge water. Two treatment principles dominate the market -- biological plants that use aerobic bacteria to digest waste over a multi-stage retention period, and electrochemical plants that break down and disinfect waste using an electrolytic cell, typically generating disinfectant in situ from seawater. Biological plants need a stable feed and enough retention time to keep the bacterial culture alive; electrochemical plants respond faster to intermittent loads but consume more power and electrode life.

Sewage treatment plant flow scheme — Flow scheme of a three-chamber biological sewage treatment plant: inlet sewage is aerated in the first chamber, settles in the second chamber with sludge returned to the first, and is disinfected in the third chamber before discharge overboard.

Main components

Aeration or treatment chamber

On biological plants, a series of chambers -- aeration, settling, and often a final disinfection stage -- where an air blower keeps the bacterial culture aerobic and mixed with incoming waste.

Electrolytic cell

On electrochemical plants, a cell with plate or tube electrodes through which seawater or the effluent itself passes, generating disinfectant in situ rather than dosing a stored chemical.

Comminutor / macerator

A grinding stage ahead of treatment that reduces solids to a size the biological or electrochemical process can handle, and prevents rag and debris from blocking downstream pumps.

Effluent monitoring

A sample point, and on many installations a continuous monitor, for the parameters the discharge standard sets -- typically suspended solids, faecal coliform count and residual chlorine -- checked before the effluent is allowed overboard rather than to a holding tank.

Selection and sizing

Design population -- crew complement plus passengers where applicable -- against the plant's rated daily flow.
Peak load pattern: passenger vessels see sharp morning and evening peaks that a plant sized only on average daily flow cannot absorb.
Trading pattern: a ship spending long periods in port or in special areas needs enough holding capacity or treated-discharge capability to cover restricted zones.
Power consumption, particularly for electrochemical plants, against the electrical load budget of the vessel.
Space for retention time in biological designs -- undersizing the tankage is the most common design shortfall.

Regulations and class

MARPOL Annex IV requires an International Sewage Pollution Prevention (ISPP) certificate for ships above the size threshold it sets, backed by an initial and periodic survey of the plant and its discharge arrangements. The effluent standard the plant must meet, and the distance from land at which even treated sewage may be discharged, both come from Annex IV; special areas and some port state requirements are stricter than the baseline. Class surveys check the plant's operating log, the treatment performance against its type approval, and that the discharge piping correctly separates treated discharge from any direct overboard bypass -- a bypass valve left open or unsealed is one of the most common port state control deficiencies found on this equipment.

Typical faults

Fault	Cause	Consequence
Biological process fails	Bacterial culture killed by disinfectant or strong cleaning chemicals, or an extended low-load period with no feed	Effluent quality out of spec, weeks needed to re-establish a healthy culture
Electrode wear on electrochemical cells	Normal consumption over operating hours, accelerated by low-salinity feed water	Falling disinfection performance, eventually failing effluent monitoring
Macerator blockage	Foreign objects such as wet wipes or rags entering the system despite do-not-flush notices	Loss of flow through the plant, backup into the sanitary system
Odour and foaming	Overloading beyond design population, or aeration blower undersized or fouled	Crew complaints, and often a sign the treatment is also failing to meet discharge standard

What to look for in a supplier

Type approval certificate under MARPOL Annex IV covering the effluent standard actually required for the vessel's trading area.
Rated capacity matched with margin to the vessel's actual population and peak load pattern, not just average daily flow.
Spare parts availability for electrodes, blower diaphragms or membranes specific to the model.
Clear operating and troubleshooting documentation the crew can follow, since this equipment is usually maintained by ship's staff rather than a specialist.

A biological plant that has sat unused during a long yard period needs to be reseeded and given time to re-establish its bacterial culture before sailing -- opening the discharge valve on day one, before the culture has recovered, is how an otherwise sound plant fails its first effluent check after a refit.

4000h

Service Interval

5 yr

Class Survey

15 yr

Typical Lifetime

Typical Manufacturers

Scanship DVZ Jets Hamworthy

Inspector Mode Show All 148 total

18 manufacturers · 148 models

Evac

47 ✓ 20 verified

Evac 910

Ship-wide system, 10-2000 users · Marine Equipment · vacuum sewage treatment plant

Type

Vacuum Toilet System

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Service: Inspect feed and discharge paths, strainers, pumps, treatment elements, monitoring and diverting arrangements. Trend production, pressure and water quality where applicable and keep pretreatment equipment clean. Prevent doubtful product water or inadequately treated effluent from entering the wrong system. Refer to the manufacturer documentation for the exact figure for pressure, cleaning, dosing and quality criteria.

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Very low freshwater consumption compared with conventional gravity systems
Small footprint – suitable for vessels with limited space
Integrated pump and control panel simplify installation and operation
Meets MARPOL Annex IV discharge standards out of the box
Easy access to valves for routine cleaning

Weaknesses

Reliance on a single vacuum pump – failure can halt waste handling
Requires strict crew discipline to prevent foreign objects in toilets
Higher initial purchase price than basic gravity‑type systems
Periodic valve and line cleaning (every 3 months) adds maintenance workload
Power demand is higher than non‑vacuum solutions

Typical Vessels: Cruise shipFerryOffshore supply vesselNaval auxiliaryPassenger liner

Certifications: IMO Type Approval (Annex IV)DNV class approval

Decision Guide: Choose if the vessel needs a space‑saving, low‑water‑use sewage solution and can maintain regular vacuum‑system upkeep. Avoid if the ship cannot guarantee reliable power for the pump or lacks crew training to keep foreign objects out of the system.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Evac MBR 50 unverified

· membrane bioreactor STP 50 PE

System description

membrane bioreactor STP 50 PE

Application

marine sanitary / water treatment

Person equivalent

Common Failures & Inspection Points

Reduced treatment performance caused by fouled filters, exhausted media, scaled membranes, aged lamps or contaminated process surfaces, resulting in poor water quality or increased pressure drop
Dosing, regeneration or process-control failure caused by empty consumables, pump faults or control errors, resulting in incorrect treatment conditions
Sensor or conductivity fault caused by fouling, calibration drift or wiring problems, resulting in implausible readings or alarms
Pump or valve failure caused by wear, blockage or electrical faults, resulting in low treatment flow or inability to route water correctly
Leakage caused by seal, housing, membrane, pressure-vessel or piping deterioration, resulting in water loss and unstable process conditions

Service: Inspect filters, membranes, lamps, dosing equipment, treatment vessels, pumps, valves, sensors and sample points as applicable to the installed process. Maintain hygienic conditions during opening of potable-water equipment. Trend pressure drop and water-quality indications and investigate abnormal values promptly. Verify alarms, regeneration, diversion or shutdown functions after maintenance. Store chemicals and treatment media according to approved procedures. Refer to the manufacturer documentation for the exact figure for dosing, replacement, cleaning and water-quality settings.

Spare Parts: Keep filter elements, membrane or lamp components, approved treatment media, dosing-pump service parts, seals, valves, sensors and sampling consumables recommended for the installed process. Chemicals must be approved for the intended water service.

Use Cases: It is used for freshwater, potable-water and sanitary treatment on merchant ships, passenger vessels, offshore units or other vessel types where this equipment category is fitted.

Datasheet

Evac MBR 100 unverified

· membrane bioreactor STP 100 PE

System description

membrane bioreactor STP 100 PE

Application

marine sanitary / water treatment

Person equivalent

100

Common Failures & Inspection Points

Reduced treatment performance caused by fouled filters, exhausted media, scaled membranes, aged lamps or contaminated process surfaces, resulting in poor water quality or increased pressure drop
Dosing, regeneration or process-control failure caused by empty consumables, pump faults or control errors, resulting in incorrect treatment conditions
Sensor or conductivity fault caused by fouling, calibration drift or wiring problems, resulting in implausible readings or alarms
Pump or valve failure caused by wear, blockage or electrical faults, resulting in low treatment flow or inability to route water correctly
Leakage caused by seal, housing, membrane, pressure-vessel or piping deterioration, resulting in water loss and unstable process conditions

Use Cases: It is used for freshwater, potable-water and sanitary treatment on merchant ships, passenger vessels, offshore units or other vessel types where this equipment category is fitted.

Datasheet

Evac MBR 200 unverified

· membrane bioreactor STP 200 PE

System description

membrane bioreactor STP 200 PE

Application

marine sanitary / water treatment

Person equivalent

200

Common Failures & Inspection Points

Reduced treatment performance caused by fouled filters, exhausted media, scaled membranes, aged lamps or contaminated process surfaces, resulting in poor water quality or increased pressure drop
Dosing, regeneration or process-control failure caused by empty consumables, pump faults or control errors, resulting in incorrect treatment conditions
Sensor or conductivity fault caused by fouling, calibration drift or wiring problems, resulting in implausible readings or alarms
Pump or valve failure caused by wear, blockage or electrical faults, resulting in low treatment flow or inability to route water correctly
Leakage caused by seal, housing, membrane, pressure-vessel or piping deterioration, resulting in water loss and unstable process conditions

Use Cases: It is used for freshwater, potable-water and sanitary treatment on merchant ships, passenger vessels, offshore units or other vessel types where this equipment category is fitted.

Datasheet

Evac MBR 500 unverified

· membrane bioreactor STP 500 PE

System description

membrane bioreactor STP 500 PE

Application

marine sanitary / water treatment

Person equivalent

500

Common Failures & Inspection Points

Reduced treatment performance caused by fouled filters, exhausted media, scaled membranes, aged lamps or contaminated process surfaces, resulting in poor water quality or increased pressure drop
Dosing, regeneration or process-control failure caused by empty consumables, pump faults or control errors, resulting in incorrect treatment conditions
Sensor or conductivity fault caused by fouling, calibration drift or wiring problems, resulting in implausible readings or alarms
Pump or valve failure caused by wear, blockage or electrical faults, resulting in low treatment flow or inability to route water correctly
Leakage caused by seal, housing, membrane, pressure-vessel or piping deterioration, resulting in water loss and unstable process conditions

Use Cases: It is used for freshwater, potable-water and sanitary treatment on merchant ships, passenger vessels, offshore units or other vessel types where this equipment category is fitted.

Datasheet

EcoTreat 2

Application

Compact marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

EcoTreat 5

Application

Marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

EcoTreat 11

Application

Marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

MBR 40

Application

Membrane bioreactor sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 7K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 15K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 22K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 30K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 45K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 70K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 95K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 120K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac MBR 145K ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac EcoTreat ✓ verified

Application

Marine Sewage Treatment (Black and Grey Water)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac EcoOcean MBBR ✓ verified

Application

Marine Sewage Treatment (Cruise Ships, Large Vessels)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac ORCA II A ✓ verified

Application

Marine Sewage Treatment (Electrolytic)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac ORCA III ✓ verified

Application

Marine Sewage Treatment (Physical/Chemical)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac ORCA IV B ✓ verified

Application

Marine Sewage Treatment (Electrolytic)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac CSWE Series ✓ verified

Application

Marine Sewage Treatment (Merchant Vessels)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac EcoScreen ✓ verified

Application

Marine Sewage Treatment (Pre-treatment Screening)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac EcoTrap ✓ verified

Application

Marine Sewage Treatment (Grease Separator)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac SGT ✓ verified

Application

Marine Sewage Treatment (Grease Separator)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac HydroTreat ✓ verified

Application

Marine Organic Waste Treatment (Wet Waste)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Evac Dehydro ✓ verified

Application

Marine Organic Waste Treatment (Wet Waste Dehydration)

Common Failures & Inspection Points

Area: Membrane fouling and filter clogging in MBR/MBBR systems
Check: Visual inspection of membrane status and pressure differential readings; verify EcoScreen pre-treatment is properly operated for BOD load reduction; inspect transmembrane pressure (TMP) recordings - should remain stable within design specifications
Area: Biological process upset and sludge accumulation in treatment reactors
Check: Monthly biosolids level monitoring and sludge discharge procedures; verify mixed liquor suspended solids (MLSS) concentration matches design specifications; inspect sludge handling system for proper collection tank operation and maintenance
Area: Chemical depletion and overdosing in ORCA electrolytic systems
Check: Verify 5% chlorine solution levels (ORCA II A) or electrolyte levels are within specifications; confirm automated dosing systems are functioning correctly; test effluent disinfection efficacy according to IMO MEPC 227(64) requirements
Area: Effluent quality non-compliance and nutrient overflow in restricted areas (Baltic Sea, River Rhine)
Check: Quarterly sampling and testing of treated effluent for BOD, TSS, nitrogen and phosphorus levels; verify compliance with IMO MEPC 227(64) Chapter 4.2 requirements for passenger ships in special areas; maintain International Sewage Pollution Prevention Certificate documentation
Area: System operational failure and control panel malfunctions
Check: Verify touchscreen control panel responsiveness; test automated shutdown procedures; confirm integration with ship's main automation system; check alarm and monitoring functions are properly logged and reviewed; ORCA IV B systems require 3-month maintenance interval verification

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Advanced Waste Water Purification (AWP) System EcoOcean type: 90N, 120N

Per ship freshwater demand · Marine Equipment · Membrane bioreactor with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Compact modular design suitable for limited engine‑room space
High effluent quality (≤10 mg/L BOD, ≤1 mg/L total nitrogen) without heavy chemical dosing
Automatic membrane cleaning cycle reduces fouling risk
Integrated UV lamp provides reliable final disinfection
DNV and IMO type approval simplifies class certification

Weaknesses

Membrane modules require quarterly cleaning and periodic replacement, increasing O&M cost
UV lamp life is limited to operating‑hour thresholds; replacement adds downtime
Higher initial capital outlay compared with conventional biological treatment plants
Requires trained crew for membrane monitoring and chemical dosing system upkeep

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsLNG carriers (zero‑discharge class)Container ships with strict environmental permits

Certifications: DNVIMO Type Approval (MARPOL Annex IV)

Decision Guide: Choose if: you need a compact system that delivers high‑quality effluent, operate in regions with stringent discharge limits, or prefer low chemical usage. Avoid if: budget constraints dominate the purchase decision, crew training for membrane handling is limited, or vessel space cannot accommodate the modular units.

Use Cases: The EcoOcean AWP is typically installed on passenger vessels and offshore support ships where regulatory pressure demands near‑zero sewage discharge, and on newbuilds seeking a future‑proof, low‑footprint treatment solution.

Datasheet

EcoOcean 90 Advanced Waste Water Purification (AWP) System

Per ship freshwater demand · Marine Equipment · Membrane‑bioreactor + RO + UV

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Integrated multi‑stage treatment (MBR, RO, UV) delivers very low BOD5, nitrogen and pathogen levels, suitable for discharge in strict Emission Control Areas.
Small footprint and modular design allow installation on vessels with limited space.
Automated dosing and control system reduces crew workload; daily water‑quality checks are built‑in.
Quarterly membrane cleaning schedule is supported by manufacturer‑provided chemicals and procedures.
DNV approval confirms compliance with international classification society standards.

Weaknesses

Membrane fouling can increase maintenance frequency, especially on vessels with high organic loads.
UV lamp replacement must be tracked by operating hours; failure leads to immediate loss of disinfection capability.
Chemical dosing pumps are a single point of failure; redundancy is not standard and may require extra investment.
Chlorinator malfunction can affect final water quality if UV is offline, requiring manual intervention.
Higher capital cost compared with basic biological sewage plants.

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsContainer ships operating in ECAsSpecialist tankers with zero‑discharge requirements

Certifications: DNVIMO MARPOL Annex IV compliance

Decision Guide: Choose if the vessel operates in Emission Control Areas, requires discharge of treated water that meets stringent quality limits, or needs a compact system with integrated UV disinfection. Avoid if budget constraints are tight, crew cannot commit to regular membrane cleaning, or redundancy for dosing pumps is mandatory.

Use Cases: The EcoOcean 90 AWP is typically installed on cruise liners and ferries that must discharge treated sewage in ports with strict environmental regulations, as well as on offshore supply vessels where zero‑discharge zones are common. It is also used on container ships transiting ECAs to avoid penalties for non‑compliant effluent.

Datasheet

Evac MBR 7KN

Per ship freshwater demand · Marine Equipment · Membrane Bioreactor (MBR) sewage treatment

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Produces effluent well below the 1 mg/L total suspended solids limit required by MARPOL Annex IV.
Small footprint compared with conventional activated‑sludge plants, suitable for space‑constrained vessels.
Low sludge production reduces handling and disposal requirements on board.
Automated control system with daily water‑quality monitoring and quarterly membrane cleaning schedule.
DNV‑GL approved design, providing recognized class society validation.

Weaknesses

Membrane fouling can increase operating costs; requires disciplined quarterly cleaning and occasional chemical cleaning.
Higher electrical power demand than simple biological systems due to pumps and UV lamp operation.
Reliance on UV lamps and chlorinator means critical components have limited service life and must be tracked by operating hours.
Chemical dosing pump failures can impair disinfection if not promptly addressed.
Initial capital cost is higher than basic septic‑tank style solutions.

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsContainer ships (>5,000 GT)Large tankers with passenger accommodation

Certifications: IMO Type Approval (MARPOL Annex IV)DNV‑GL approval

Decision Guide: Choose if: you need a compact system that reliably meets strict effluent standards, have crew trained for membrane maintenance, and can budget for higher upfront cost and periodic chemical cleaning. Avoid if: the vessel operates on a very tight budget, has limited technical staff for regular membrane care, or primarily discharges in waters where less stringent treatment is acceptable.

Use Cases: The MBR 7KN is typically installed on passenger‑focused vessels such as cruise liners and ferries that generate large volumes of sewage and must comply with strict discharge regulations at every port. It is also used on offshore support ships and high‑capacity container or tanker vessels where deck space is premium and low sludge generation simplifies waste handling.

Datasheet

EVAK MBR 7K - 145K

Per ship freshwater demand · Marine Equipment · Membrane Bioreactor (MBR) with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Delivers high‑quality effluent (<10 mg/L BOD, <1 mg/L total nitrogen) suitable for discharge in sensitive waters
Compact footprint compared with conventional septic tanks – advantageous on space‑constrained vessels
Integrated UV module provides reliable final disinfection without chemicals
Low sludge production reduces handling and storage requirements onboard
Automated control system with daily water‑quality monitoring

Weaknesses

Membrane fouling requires quarterly chemical cleaning, increasing O&M effort
UV lamp must be replaced according to operating hours; failure can compromise disinfection
Chemical dosing pumps have a known failure rate and need spare parts on board
Higher initial capital cost than simple gravity‑based treatment units
Requires trained crew for routine membrane maintenance and system diagnostics

Typical Vessels: Cruise shipFerryOffshore supply vesselContainer shipBulk carrier

Certifications: DNV

Decision Guide: Choose if the vessel needs high‑grade effluent to meet strict discharge regulations, has limited space for treatment equipment, and can support quarterly membrane cleaning and UV lamp replacement. Avoid if sewage volumes are low, budget constraints dominate, or crew lack the training for regular MBR maintenance.

Use Cases: Installed on passenger vessels, ferries and offshore supply ships that operate long voyages in emission‑control areas where MARPOL Annex IV discharge limits are enforced. Also used on large cargo carriers requiring a compact, high‑performance wastewater solution.

Datasheet

Models: 22K, 22KC, 30K, and 30KC

Per ship freshwater demand · Marine Equipment · Membrane bioreactor (MBR) with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Small footprint – suitable for vessels with limited space
Low power consumption compared with larger plant designs
Integrated UV lamp provides reliable final disinfection
Quarterly membrane cleaning schedule is straightforward
Meets international sewage discharge regulations (MARPOL Annex IV, USCG Type Approval)

Weaknesses

Maximum daily flow limited – best for small to medium vessels
Membrane fouling can increase maintenance effort if feed water quality is poor
UV lamp must be replaced according to operating hours, adding recurring cost
Optional chlorination module (KC versions) adds complexity and a potential failure point
No advanced nitrogen‑phosphorus removal – only basic BOD reduction

Typical Vessels: Passenger ferriesCoastal cargo vesselsOffshore supply shipsYachts / superyachtsSmall container or bulk carriers (up to ~10 000 gt)

Certifications: USCG Type ApprovalDNV GL Approved

Decision Guide: Choose if you need a compact, low‑energy sewage treatment solution that fits on medium‑size vessels and offers built‑in UV disinfection for MARPOL compliance. Avoid if the vessel has very high sewage flow rates, requires advanced nutrient removal, or prefers a fully redundant multi‑stage plant.

Use Cases: Typically installed on regional passenger ferries operating in EU waters, offshore supply vessels that need to meet strict discharge limits while preserving deck space, and luxury yachts where reliability and low noise are priorities.

Datasheet

Models: 2K, 2KC, 4K, and 4KC

Per ship freshwater demand · Marine Equipment · Biological‑membrane treatment with UV/Chlorine disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Small footprint – can be installed on vessels with limited space
Fully automated control system reduces crew workload
Meets IMO and USCG sewage discharge regulations out of the box
Low power consumption compared with larger land‑based plants
Modular design allows scaling from 2K (≈200 m³/d) to 4K (≈400 m³/d)

Weaknesses

Membrane fouling requires quarterly cleaning and careful pretreatment
UV lamp life must be tracked; replacement adds operational cost
Chemical dosing pumps have a known failure rate, requiring spares on board
Maximum flow limited – not suitable for very high‑capacity tankers or bulk carriers
Chlorinator version (…C models) needs careful handling of chlorine chemicals

Typical Vessels: Passenger ferriesCruise ships (up to mid‑size)Offshore supply vesselsSmall tankers and product carriersRo‑Ro and container feeder vessels with limited deck space

Certifications: IMO MARPOL Annex IV complianceUSCG Type Approval (listed in CGMIX database)DNV Class approval (common for Evac BWMS installations)

Decision Guide: Choose if you need a compact, automated sewage treatment solution that fits on medium‑size vessels and must meet strict discharge limits with minimal crew intervention. Avoid if the vessel has very high sewage flow rates, limited maintenance capability for membrane cleaning, or if you prefer a purely mechanical system without UV/chlorine components.

Use Cases: Typically installed on passenger ferries operating short routes, cruise ships where deck space is at a premium, offshore supply vessels that require continuous compliance with discharge regulations, and small to medium cargo carriers that need an integrated BWMS without sacrificing cargo volume.

Datasheet

Evac Oy Models: 2K(C), 4K(C), 7K(C), 15K(C), 22K(C), 30K(C), and 45K(C) The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Models: 2K(C), 4K(C), 7K(C), 15K(C), 22K(C), 30K(C), and 45K(C) The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Per ship freshwater demand · Marine Equipment · Biological + UV disinfection sewage treatment plant

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Compact, modular design suitable for vessels with limited space
Fully automated control panel; daily water‑quality monitoring built‑in
Meets IMO D‑2 and USCG Type‑Approval (33 CFR 159) requirements out of the box
Low power consumption compared with larger membrane‑based plants
Quarterly membrane cleaning schedule and UV‑lamp life tracking simplify maintenance

Weaknesses

Maximum flow capacity limited to the rating of each model; oversized loads may require multiple units
UV lamp must be replaced according to operating hours, adding recurring cost
Membrane fouling can occur if influent contains high solids or oil‑water emulsions
Optional chlorination adds chemical storage and handling requirements
Higher initial capital cost than simple macerators or basic bio‑filters

Typical Vessels: Offshore supply vesselPassenger ferryCruise ship (mid‑size)Fishing vessel / factory trawlerYacht / mega‑yachtSmall bulk carrier or tanker (30K/45K models)

Certifications: IMO D-2USCG Type Approval (33 CFR 159)ABS Approved

Decision Guide: Choose if: you need a compact, fully automated sewage plant that already complies with IMO Annex IV and USCG regulations, have limited installation space, and can commit to quarterly membrane cleaning and periodic UV‑lamp replacement. Avoid if: the vessel’s sewage flow exceeds the capacity of the selected model, budget constraints prohibit the higher upfront cost, or you prefer a low‑maintenance system without UV/chlorine components.

Use Cases: These plants are typically installed on vessels where space is at a premium but regulatory compliance is mandatory—e.g., offshore supply ships operating in US waters, passenger ferries serving coastal routes, mid‑size cruise ships, and high‑value yachts that require reliable, low‑maintenance wastewater treatment while meeting strict discharge standards.

Datasheet

Models: 45K and 45KC

Per ship freshwater demand · Marine Equipment · MBBR‑UV membrane bioreactor

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Small footprint – fits vessels with limited engine room space
Low power consumption compared with larger plants
Integrated UV disinfection provides reliable pathogen kill
Quarterly membrane cleaning schedule is straightforward
Meets USCG and IMO type‑approval for sewage discharge

Weaknesses

Membrane fouling can increase pressure drop if pretreatment is inadequate
UV lamp must be replaced according to operating hours, adding recurring cost
Chemical dosing pump reliability has been reported as a weak point
Maximum flow capacity limits use on high‑capacity tankers or cruise ships
Daily water‑quality checks are required to maintain compliance

Typical Vessels: Offshore supply vesselFerryFeeder container shipSmall tankerFishing vesselPassenger tender

Certifications: USCG Type ApprovalIMO Type Approval (MARPOL Annex IV)

Decision Guide: Choose if you need a compact, low‑power sewage treatment solution for vessels up to ~200 m³/day discharge and can commit to quarterly membrane cleaning and regular UV lamp monitoring. Avoid if the vessel has very high sewage flow rates, limited crew time for daily water quality testing, or requires a system with minimal chemical dosing components.

Use Cases: Typically installed on medium‑size cargo ships, passenger ferries and offshore support vessels operating in ports with strict discharge regulations; used to treat blackwater before discharge in emission control areas or when shore reception facilities are unavailable.

Datasheet

Models: 7K, 7KC, 15K, and 15KC

Per ship freshwater demand · Marine Equipment · Biological + UV sewage treatment plant

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Compact footprint suitable for vessels with limited space
Produces high‑quality effluent meeting strict discharge limits (MARPOL Annex IV)
Automatic quarterly membrane cleaning reduces fouling risk
Low power consumption compared to larger membrane‑RO systems
Modular design allows optional chlorination or chemical dosing

Weaknesses

Membrane fouling can occur if cleaning schedule is missed
UV lamp must be replaced based on operating hours, adding maintenance cost
Chemical dosing pumps have reported occasional failures
Maximum capacity (≈10 m³/d for 7K, ≈20 m³/d for 15K) limits use on very large vessels
Initial capital cost higher than simple macerators

Typical Vessels: Passenger ferryCruise shipOffshore supply vesselCoastal bulk carrierContainer feeder

Certifications: USCG Type ApprovalDNV Classification

Decision Guide: Choose if the vessel needs a compact, high‑performance sewage treatment solution that meets zero‑discharge zones and you can commit to regular membrane cleaning and UV lamp replacement. Avoid if the ship generates very large volumes of black water or lacks crew/maintenance capacity for quarterly membrane servicing.

Use Cases: Installed on EU coastal ferries operating in strict discharge areas, cruise ships requiring onboard treatment for passenger waste, and offshore supply vessels that need reliable compliance with MARPOL Annex IV while preserving deck space.

Datasheet

Models: MBR – 8 and 8C, 16 and 16C, 24 and 24C, 32 and 32C, 40 and 40C, 80 and 80C, 120 and 120C, 160 and 160C, and 240 and 240C.

Per ship freshwater demand · Marine Equipment · Membrane bioreactor (MBR) sewage treatment

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Produces high‑quality effluent (<10 mg/L BOD, <1 mg/L total nitrogen) compliant with strict regulations
Very small footprint; modular design fits vessels with limited space
Scalable capacity from 8 m³/d up to 240 m³/d using the same platform
Integrated UV disinfection eliminates need for chemical biocides
Low sludge production and simple waste handling

Weaknesses

Membrane fouling requires regular (quarterly) cleaning and monitoring
Higher initial capital cost compared with conventional activated‑sludge units
UV lamp must be replaced based on operating hours, adding maintenance expense
Energy consumption rises at high load; reliable power supply is essential
Chemical dosing pumps (if fitted) can fail, risking non‑compliance

Typical Vessels: Cruise shipFerryOffshore support vesselSupply tankerContainer feederResearch vessel

Certifications: IMO Type Approval (G8/3)USCG Type ApprovalDNV Classification Society approval

Decision Guide: Choose if: you need a compact, high‑efficiency sewage plant that can be scaled from small to large capacities and you value integrated UV disinfection with low sludge output. Avoid if: budget constraints prohibit higher upfront cost, or the vessel cannot accommodate regular membrane cleaning schedules and UV lamp maintenance.

Use Cases: Evac MBR units are typically installed on passenger vessels, offshore supply ships and large cargo carriers where space is at a premium but strict sewage discharge limits apply. They are favored for routes with frequent port calls and stringent local regulations, providing continuous compliance without the need for shore‑based treatment facilities.

Datasheet

Models: ORCA IIA – 12, 24, 36, 70, 165, 330, and 500

Per ship freshwater demand · Marine Equipment · Membrane bioreactor + UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Modular capacity range allows sizing for small ferries to large cruise ships
Integrated UV system provides reliable final disinfection without chemicals
Automatic chemical dosing reduces operator workload and ensures consistent performance
Compact footprint fits in limited engine‑room spaces
IMO type‑approved, facilitating compliance on new builds and retrofits

Weaknesses

Membrane fouling requires quarterly cleaning and can increase O&M costs
UV lamp must be replaced according to operating hours, adding scheduled expense
Chemical dosing pumps add complexity and are a potential failure point
Higher initial capital cost compared with simpler biological plants
Requires trained personnel for routine monitoring and maintenance

Typical Vessels: Cruise shipFerryOffshore supply vesselContainer shipBulk carrier

Certifications: IMO Type Approval

Decision Guide: Choose if you need a proven, compact sewage plant with scalable capacity and UV disinfection for vessels that must meet strict MARPOL Annex IV limits and have the ability to perform regular membrane cleaning. Avoid if your crew lacks the training for membrane maintenance or if you require a low‑cost solution with minimal chemical handling.

Use Cases: Installed on passenger ferries, cruise liners, and offshore supply vessels to treat black water onboard, enabling compliance with discharge regulations in coastal waters and providing the option for water reuse where permitted. Frequently selected for retrofits where space is limited but high treatment performance is required.

Datasheet

Evac Oy Models: ORCA IVBA - 15, 35, 50, 65, 100, 200, and 300 The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Models: ORCA IVBA - 15, 35, 50, 65, 100, 200, and 300 The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Per ship freshwater demand · Marine Equipment · Membrane‑bioreactor with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Meets mandatory USCG 33 CFR 159 standards for sewage discharge
Modular design allows installation on vessels from 15 to 300 crew capacity
Combined membrane and UV treatment yields high-quality effluent with low odor
Compact footprint suitable for space‑constrained ships
Proven reliability in cruise ships, ferries and offshore supply vessels

Weaknesses

Membrane fouling requires quarterly chemical cleaning and skilled maintenance
UV lamp life is limited; replacement adds recurring cost and downtime
System depends on multiple dosing pumps; pump failure can impair treatment
Higher initial capital outlay compared with simple septic tanks
Requires daily water‑quality monitoring to verify compliance

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsContainer ships (mid‑size)Tugboats and workboats with crew accommodations

Certifications: USCG Type Approval (33 CFR 159.16)IMO MARPOL Annex IV compliance

Decision Guide: Choose if: you need a compact, high‑performance sewage plant that guarantees compliance on vessels with limited space and a crew willing to perform regular membrane cleaning and UV lamp checks. Avoid if: the vessel operates on very low budgets, lacks trained personnel for routine maintenance, or can accept less stringent effluent quality.

Use Cases: The ORCA IVBA is typically installed on passenger‑focused ships (cruise liners, ferries) where odor control and strict discharge limits are mandatory, as well as on offshore supply vessels that must treat sewage onboard for extended periods between port calls. Its modular capacity range lets shipowners select a size matching crew numbers while staying within class society and flag state regulations.

Datasheet

Evac Oy Models: ORCA IV BAN - 15, 35, 50, 65, 100, 200, and 300 The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Models: ORCA IV BAN - 15, 35, 50, 65, 100, 200, and 300 The models specified have been tested and found to meet the requirements of 33 CFR 159 and shall be labeled in accordance with 33 CFR 159.16.

Per ship freshwater demand · Marine Equipment · Membrane Bioreactor (MBR) with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Meets 33 CFR 159.16 labeling and discharge limits out‑of‑the‑box
Modular capacity range (15–300 m³/d) allows sizing to vessel crew/passenger load
High effluent quality – low BOD, nitrogen and pathogen levels
Small footprint compared with conventional septic tanks
Integrated UV unit provides chemical‑free final disinfection

Weaknesses

Membrane fouling requires quarterly cleaning and skilled operator oversight
UV lamp must be replaced on a defined operating‑hour schedule – adds OPEX
Chemical dosing pumps (pH, biocide) have documented failure rates in the field
Initial capital cost higher than simple gravity‑based systems
Requires reliable power supply and space for control panels

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsContainer ships (large)Tankers with crew accommodationPassenger ferries

Certifications: USCG Type Approval (33 CFR 159.16)

Decision Guide: Choose if: the vessel operates in strict discharge zones, carries many passengers/crew, or must meet port reception facility requirements without relying on chemical disinfectants. Avoid if: budget constraints preclude higher capital cost, the crew lacks training for membrane maintenance, or space is insufficient for the modular plant and its ancillary equipment.

Use Cases: Deployed on vessels that need continuous, high‑quality sewage treatment for compliance with MARPOL Annex IV and US coastal regulations—e.g., cruise liners discharging in emission control areas, ferries serving densely populated ports, and offshore support ships where shore reception facilities are limited.

Datasheet

Panel Penetration for B-15 Bulkheads – Type: “Evac 910” or “Evac Optima” vacuum toilet pipe penetration (Evac 910 or Evac Optima)

Per ship freshwater demand · Marine Equipment · vacuum toilet pipe penetration

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Integrated sealing system minimizes risk of leaks through the bulkhead
Compact design fits within standard B-15 panel dimensions, saving space
Corrosion‑resistant materials suitable for marine environments
Easy to install and service without major structural modifications
Compatible with both Evac 910 and Evac Optima vacuum toilet lines

Weaknesses

Requires a dedicated vacuum pump system; not usable on non‑vacuum installations
Flow capacity limited to the specifications of the Evac vacuum system, unsuitable for very high‑throughput vessels
Potential for clogging if waste pre‑treatment (e.g., maceration) is inadequate
Higher initial procurement cost compared with simple gravity pipe penetrations
Regular inspection and maintenance of seals are mandatory to prevent failure

Typical Vessels: Passenger ferryCruise shipOffshore supply vesselRo‑Ro vesselContainer ship equipped with advanced sewage treatment

Certifications: DNVABS

Decision Guide: Choose if: the vessel already uses an Evac vacuum toilet system, space on the bulkhead is limited, and a leak‑tight, corrosion‑resistant connection is required. Avoid if: the ship relies on gravity‑driven sewage removal, has no vacuum pump infrastructure, or budget constraints preclude higher‑cost penetrations.

Use Cases: Typically installed in passenger vessels and cruise ships where high‑capacity vacuum toilet systems are standard, as well as offshore supply vessels that need compact, reliable waste handling to meet strict discharge regulations.

Datasheet

Shipboard incinerator, 2500 kW

Per ship freshwater demand · Marine Equipment · high‑temperature marine incinerator with integrated sewage treatment

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

High thermal output (2.5 MW) enables efficient energy recovery for ship services
Integrated sludge incineration eliminates the need for separate ash handling facilities
Compact footprint suitable for vessels with limited space
Meets IMO MARPOL Annex V discharge limits through complete combustion of sewage solids
DNV‑approved design assures compliance with class society standards

Weaknesses

Significant fuel consumption when operating at full capacity
Requires skilled personnel for safe operation and regular ash removal
Periodic maintenance of high‑temperature components (e.g., refractory linings) can be costly
Limited to sewage/sludge streams; cannot process oily or hazardous waste without pre‑treatment
Initial capital cost is higher than conventional biological sewage plants

Typical Vessels: Cruise shipsLarge passenger ferriesOffshore supply vesselsContainer ships with strict emission zonesNaval auxiliary vessels

Certifications: DNVIMO Type Approval (MARPOL Annex V)USCG Type Approval (where applicable)

Decision Guide: Choose if the vessel requires high‑capacity sewage treatment with on‑board sludge disposal, operates in emission‑controlled areas, and can accommodate the fuel penalty of a thermal incinerator. Avoid if the ship has limited crew expertise, tight fuel budgets, or only low‑volume sewage loads that can be handled by conventional biological systems.

Use Cases: Typically installed on cruise liners and large ferries where continuous passenger waste generation demands reliable, space‑efficient treatment and where ash disposal at port is impractical. Also used on offshore support vessels operating in environmentally sensitive regions that mandate zero liquid discharge of sewage solids.

Datasheet

Type NH 1400 - 2100 kW

Per ship freshwater demand · Marine Equipment · Membrane Bioreactor (MBR) with UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

High removal efficiency (>95 % BOD, >99 % pathogens) meeting strict MARPOL limits
Compact modular layout suitable for limited engine‑room space
Energy‑optimized design – power range 1400–2100 kW matches large vessel loads
Integrated automated control system with real‑time water‑quality monitoring
Quarterly membrane cleaning schedule reduces long‑term fouling risk

Weaknesses

Requires regular UV‑lamp replacement based on operating hours
Membrane fouling can increase chemical dosing if not cleaned as scheduled
Higher upfront capital cost compared with conventional septic tanks
Complex chemical dosing system demands trained operators
Spare‑part inventory (membranes, lamps) must be managed onboard

Typical Vessels: Cruise shipsRo‑Ro and passenger ferriesOffshore supply vesselsLarge container vessels with crew accommodationLNG carriers equipped with extensive crew facilities

Certifications: DNVIMO Type Approval (MARPOL Annex IV)ABS (typical for Evac M‑type plants)

Decision Guide: Choose if: you need a high‑capacity, low‑footprint sewage system that guarantees MARPOL compliance on large passenger or offshore vessels and can support regular membrane cleaning. Avoid if: the vessel operates with minimal crew, has limited budget for initial installation, or cannot accommodate scheduled UV‑lamp and membrane maintenance.

Use Cases: The NH series is commonly installed on cruise liners and ferries where large numbers of passengers generate significant sewage loads; it is also used on offshore support ships that must treat waste continuously while at sea to avoid discharge restrictions in sensitive waters.

Datasheet

Type NH 1400 - 2100 kW

Per ship freshwater demand · Marine Equipment · Membrane bioreactor (MBR)

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Compact footprint for large-capacity vessels (1400–2100 kW)
Integrated UV disinfection provides reliable pathogen kill
Low sludge production thanks to membrane separation
Automated chemical dosing and monitoring reduces crew workload
Designed for compliance with MARPOL Annex IV discharge standards

Weaknesses

Membrane fouling requires quarterly cleaning and skilled maintenance
UV lamp life must be tracked by operating hours; replacement adds cost
Chemical dosing pumps have a known failure mode that may need redundancy
Relatively high power demand (up to 2100 kW) limits use on low‑power vessels
Initial capital cost higher than conventional biological treatment units

Typical Vessels: Cruise shipPassenger ferryOffshore support vesselLarge container shipBulk carrier

Certifications: DNV

Decision Guide: Choose if you need a compact, high‑capacity sewage plant with integrated UV that can handle >1 MW power and meet strict discharge limits. Avoid on vessels with limited power availability, low crew technical expertise, or where lower upfront cost is the primary driver.

Use Cases: Commonly installed on new builds of cruise ships, ferries and offshore supply vessels to satisfy MARPOL Annex IV requirements; also used in retrofits where existing treatment systems cannot meet tightened effluent standards.

Datasheet

Types NH 800 SG-S, NH 1600 SG-S & NH 1400-2100 kW

Per ship freshwater demand · Marine Equipment · membrane‑bioreactor + UV disinfection

Common Failures & Inspection Points

Membrane fouling in reverse osmosis plants
UV-Lampe End-of-Life
Chemical dosing pump failure
Chlorinator-Fehlfunktion

Service: Membrane cleaning quarterly. UV lamp per operating hours. Check water quality daily.

Spare Parts: Spare parts via Evac Oy or authorized distribution partners. Lead time: 2–6 weeks.

Strengths

Small footprint – suitable for vessels with limited space
Low power consumption relative to capacity (designed for 800–2100 kW engine power range)
Integrated UV unit provides reliable final disinfection without chemicals
Modular design allows scaling from 800 m³/d up to 2100 m³/d
DNV‑approved type and IMO Annex IV compliant out of the box

Weaknesses

Membrane fouling can increase maintenance intervals, especially with high oil/grease loads
UV lamp must be replaced based on operating hours; failure leads to non‑compliant discharge
Chemical dosing pumps (for pH control or chlorination backup) are a known point of failure
Limited redundancy – single‑line flow may require additional standby units for critical operations

Typical Vessels: Product tankersLNG carriersContainer ships up to 8 000 gtRo‑Ro vesselsOffshore supply vessels

Certifications: IMO D‑2 (Annex IV)DNV GL Type Approval

Decision Guide: Choose if you need a compact, low‑power sewage treatment solution that meets IMO Annex IV with built‑in UV disinfection and can be scaled across the 800–2100 kW power range. Avoid if your vessel operates in waters with high oil/grease content that would accelerate membrane fouling, or if you require full redundancy without adding a second unit.

Use Cases: The NH series is typically installed on medium‑size commercial vessels where space and fuel efficiency are at a premium. It is common on product tankers and LNG carriers that must treat black water continuously while cruising long distances, as well as on offshore supply ships that have limited deck area but still need to comply with strict discharge regulations.

Datasheet

ACO Marine

21 ✓ 12 verified

ACO Marine Clarimar MF 25 unverified

25 PE · membrane filtration

Treatment Type

membrane filtration

Person equivalent

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Service: Check water quality indicators, strainers, dosing points, media condition, pumps, valves, sensors and leak tightness. Confirm the unit changes state correctly between service, regeneration, flushing or standby modes where fitted. For chemical concentration, flow limits or replacement criteria not stated in the source entry, refer to the manufacturer documentation for the exact figure.

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar MF 50 unverified

50 PE · membrane filtration

Treatment Type

membrane filtration

Person equivalent

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar MF 100 unverified

100 PE · membrane filtration

Treatment Type

membrane filtration

Person equivalent

100

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar MF 200 unverified

200 PE · membrane filtration

Treatment Type

membrane filtration

Person equivalent

200

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar Bio 25 unverified

25 PE · biological treatment

Treatment Type

biological treatment

Person equivalent

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar Bio 50 unverified

50 PE · biological treatment

Treatment Type

biological treatment

Person equivalent

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

ACO Marine Clarimar Bio 100 unverified

100 PE · biological treatment

Treatment Type

biological treatment

Person equivalent

100

Imo mepc

MEPC.227(64)

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Clarimar MF

Application

High-capacity marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF

Application

Advanced marine wastewater treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.acomarine.com/fileadmin/user_upload/ACO_Data_Sheet_Clarimar_MF_EN_NEW.pdf

Datasheet

Clarimar MF-0.5 ✓ verified

Application

Marine black & grey water treatment

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Clarimar MF-2.0 ✓ verified

Application

Marine black & grey water treatment

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Clarimar MF-3.0 ✓ verified

Application

Marine black & grey water treatment

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Clarimar MF-4.0 ✓ verified

Application

Marine black & grey water treatment

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Clarimar MF-10 ✓ verified

Application

Marine black & grey water treatment

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-25 ✓ verified

Application

Advanced membrane bioreactor treatment for small marine vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-50 ✓ verified

Application

Advanced membrane bioreactor treatment for medium marine vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-75 ✓ verified

Application

Advanced membrane bioreactor treatment for cruise ships

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-100 ✓ verified

Application

Advanced membrane bioreactor treatment for commercial & cruise vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-150 ✓ verified

Application

Advanced membrane bioreactor treatment for mega-yachts and large vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-200 ✓ verified

Application

Advanced membrane bioreactor treatment for mega-yachts and large cruise vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Maripur NF-250 ✓ verified

Application

Advanced membrane bioreactor treatment for largest mega-yachts and large cruise vessels

Common Failures & Inspection Points

Area: UV lamp degradation/loss of disinfection effectiveness
Check: Measure UV lamp intensity using radiometer; verify it exceeds validated minimum threshold for current flow rate. Monitor lamp operating hours; schedule replacement at 65% output threshold (not at failure). Confirm all lamp positions are illuminated.
Area: Filter/membrane blockage and fouling reducing treatment capacity
Check: For Clarimar MF: visually inspect 'Bio-Sword' filtration element for biological accumulation; verify pressure differential across filter within normal range. For Maripur NF: check membrane permeability via trans-membrane pressure (TMP); confirm clean-in-place (CIP) system functionality; inspect for organic/inorganic fouling deposits.
Area: Effluent discharge water quality non-compliance with IMO standards
Check: Conduct monthly water quality testing: coliform bacteria count (limit ≤100/100ml), total suspended solids TSS (≤35 mg/l), biochemical oxygen demand BOD (≤25 mg/l), chemical oxygen demand COD (≤125 mg/l). Document results and compare against baseline performance test values.
Area: Electrical system vulnerability to ship vibration, humidity, and voltage fluctuations
Check: Verify nominal voltage stability at 380-440V AC; confirm frequency stability (50 or 60 Hz). Test electrical systems under simulated ship motion conditions (vibration per MEPC.107(49)). Inspect enclosure sealing for humidity/moisture ingress; verify electrical continuity and grounding integrity.
Area: Structural degradation of tank materials leading to corrosion or leakage
Check: For Clarimar MF composite tanks: inspect for surface cracks, discoloration, or delamination in ACO Composite PPFR GREY material. For Maripur NF stainless steel tanks: check for pitting, stress corrosion cracking, or scale accumulation. Inspect all weld seams (or bolted connections for modular units) for integrity; verify gaskets and dynamic seals for degradation.

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Hamworthy/Wartsila

19 ✓ 19 verified

STC0-23 ✓ verified

Application

Smallest compact sewage treatment plant for marine vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STC-13 ✓ verified

Application

Small sewage treatment plant for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/water/waste/brochure-o-water-sewage-small-stc-13.pdf

Datasheet

STC-14 ✓ verified

Application

Large sewage treatment plant for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/water/waste/brochure-o-water-sewage-large-stc.pdf

Datasheet

ST2A ✓ verified

Application

Compact sewage treatment for small marine vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (nicht erreichbar): https://www.marine-dieselparts.com/sale-12172247-hamworthy-st-2a-st-3a-dlt-15-dlt-25-marine-sewage-plant-b50x50hc-go-95511-0102.html

Datasheet

ST3A ✓ verified

Application

Compact sewage treatment for small marine vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (nicht erreichbar): https://www.marine-dieselparts.com/sale-12172247-hamworthy-st-2a-st-3a-dlt-15-dlt-25-marine-sewage-plant-b50x50hc-go-95511-0102.html

Datasheet

ST4A ✓ verified

Application

Compact sewage treatment for small marine vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST6A ✓ verified

Application

Medium sewage treatment for marine vessels and small offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST8A ✓ verified

Application

Medium-large sewage treatment for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST10A ✓ verified

Application

Large sewage treatment for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST13A ✓ verified

Application

Large sewage treatment for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST15 ✓ verified

Application

Large sewage treatment for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST20 ✓ verified

Application

Extra-large sewage treatment for marine vessels and offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST25 ✓ verified

Application

Extra-large sewage treatment for offshore platforms and large vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST30 ✓ verified

Application

Extra-large sewage treatment for major offshore platforms

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST40 ✓ verified

Application

Very large sewage treatment for major offshore platforms and large accommodation units

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST50C ✓ verified

Application

Large offshore platform sewage treatment system for harsh marine environments

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

ST60 ✓ verified

Application

Very large offshore platform sewage treatment for major installations

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STA-C Series (Retrofit) ✓ verified

Application

Retrofit sewage treatment for existing marine vessels requiring cost-effective replacement

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/water/waste/brochure-o-water-sewage-stc-retrofit.pdf

Datasheet

ST-C Series (Retrofit) ✓ verified

Application

Retrofit sewage treatment for existing marine vessels

Common Failures & Inspection Points

Area: Blower and compressor motor operation and performance efficiency loss
Check: Verify rotary blower functionality, measure air output pressure, inspect motor insulation and bearing condition, test for unusual vibration or noise indicating wear
Area: Aeration compartment fouling and biological sludge accumulation reducing treatment efficiency
Check: Inspect aeration compartment for excessive sludge buildup, check fine-bubble diffuser clogging, verify settling rate and sludge removal procedures compliance
Area: Chemical disinfection and dechlorination system effectiveness (chlorine residual levels)
Check: Test chlorine residual concentration in contact compartment, verify dechlorination chemical levels, check discharge effluent quality parameters per IMO MEPC 227(64)
Area: Discharge pump and motor degradation affecting overboard discharge capability
Check: Inspect discharge pump casings for corrosion, verify motor seal integrity against saltwater ingress, test pump pressure and flow rate against design specifications
Area: Electrical system corrosion and control circuit failure in saltwater marine environment
Check: Inspect 380-440V electrical connections and control panels for corrosion/moisture, verify 110V control voltage and safety interlocks functional, test emergency stop functionality

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/water/waste/brochure-o-water-sewage-stc-retrofit.pdf

Datasheet

Jowa

13 ✓ 10 verified

STP 2016-15

Application

Marine sewage treatment plant - small vessel

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/products/waste-handling-system-oily-water-systems/stp-2010-sewage-treatment-plant/

Datasheet

STP 2016-50

Application

Marine sewage treatment plant - medium vessel

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/products/waste-handling-system-oily-water-systems/stp-2010-sewage-treatment-plant/

Datasheet

STP 2016-100

Application

Marine sewage treatment plant - large vessel

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/products/waste-handling-system-oily-water-systems/stp-2010-sewage-treatment-plant/

Datasheet

STP 2010-15 ✓ verified

Application

Marine Sewage Treatment Plant (15 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STP 2010-25 ✓ verified

Application

Marine Sewage Treatment Plant (25 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STP 2010-40 ✓ verified

Application

Marine Sewage Treatment Plant (40 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STP 2010-60 ✓ verified

Application

Marine Sewage Treatment Plant (60 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

STP 2016-15 ✓ verified

Application

Marine Sewage Treatment Plant (15 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/wp-content/uploads/Brochure-Jowa-STP2016-Sewage-Treatment-Plant.pdf

Datasheet

STP 2016-25 ✓ verified

Application

Marine Sewage Treatment Plant (25 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/wp-content/uploads/Brochure-Jowa-STP2016-Sewage-Treatment-Plant.pdf

Datasheet

STP 2016-40 ✓ verified

Application

Marine Sewage Treatment Plant (40 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/wp-content/uploads/Brochure-Jowa-STP2016-Sewage-Treatment-Plant.pdf

Datasheet

STP 2016-50 ✓ verified

Application

Marine Sewage Treatment Plant (50 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/products/waste-handling-system-oily-water-systems/stp-2010-sewage-treatment-plant/

Datasheet

STP 2016-100 ✓ verified

Application

Marine Sewage Treatment Plant (100 persons equivalent)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (seite leer): https://jowa.com/wp-content/uploads/Brochure-Jowa-STP2016-Sewage-Treatment-Plant.pdf

Datasheet

BIO STP ✓ verified

Application

Marine Sewage Treatment Plant (Multi-type, automated)

Common Failures & Inspection Points

Area: Aeration System Functionality - Verify that the air blower operates normally, produces adequate air flow (measured in m³/h), and shows no unusual vibrations or
Check: Operational test of blower unit; visual inspection of diffuser elements; measurement of air delivery pressure and flow rate; check for unusual noise or vibration
Area: Chlorine Disinfection and De-chlorination Chemical System - Verify chlorine dosing pump operational status and output rate (target 5%), monitor de-chlorination
Check: Test chlorine dosing pump capacity and pressure; verify de-chlorination system activation; sampling of effluent for residual chlorine content; inspection of chemical storage and delivery lines
Area: Biofilm Reactor Integrity and Biological Process - Verify that the fixed-film structured matrix is intact, not collapsed or excessively fouled. Monitor tank for
Check: Visual internal inspection of reactor matrix and tank walls; odor assessment; sludge level measurement; microbial activity verification; sediment sampling for COD/BOD parameters
Area: Vacuum/Gravity Feed System and Sewage Inlet Lines - Ensure vacuum unit (if installed) operates at correct pressure range, check all sewage inlet lines for leaks
Check: Pressure gauge reading for vacuum system; visual inspection of all feed lines and connections; pressure/flow testing; valve function verification; check for odor leaks indicating line failures
Area: System Capacity and Load Compliance - Verify that actual crew/passenger count and wastewater generation rates do not exceed the rated P.E. capacity of the insta
Check: Review vessel crew manifest and capacity records; sampling of influent sewage flow rate and BOD5 concentration; comparison with unit design specifications (1.05-4.20 m³/day for STP 2010; 15-100 P.E. for STP 2016)

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Detegasa

7 ✓ 6 verified

STP Model 2940

Application

Marine biological sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

DELTA STPN Series (STPN-250 through STPN-8400) ✓ verified

Application

Black and grey water treatment for marine vessels

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

DELTA STPN-1260 ✓ verified

Application

Black and grey water treatment for mega-yachts

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://detegasa.com/detegasa-will-install-a-stp-on-the-megayacht-leander/

Datasheet

DELTA PRBN Series ✓ verified

Application

Compact black water treatment for marine vessels

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

DELTA PRM Series (Membrane Bioreactor - PRN-50 tested model) ✓ verified

Application

Advanced black and grey water treatment with membrane filtration

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://detegasa.com/new-certificate-imo-mepc-227-64-two-families-membrane-sewage-treatment-plants/

Datasheet

DELTA FQM Series (Membrane Bioreactor - FQM-50 tested model) ✓ verified

Application

Advanced black and grey water treatment with membrane filtration

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://detegasa.com/new-certificate-imo-mepc-227-64-two-families-membrane-sewage-treatment-plants/

Datasheet

Detegasa DELTA PR-036 (Biological Series)

DELTA PR-036 (Biological Series) ✓ verified

Application

Small capacity black and grey water treatment

Common Failures & Inspection Points

Area: Aeration System Performance and Pump Operation
Check: Verify air blower functionality, check for abnormal noise or vibration, measure dissolved oxygen levels in aeration tanks (should maintain 2-4 mg/L), inspect air hoses for blockages or leaks
Area: Membrane Condition and Filtration Integrity (for MBR/FQM/PRM models)
Check: Visual inspection of membrane module for fouling or damage, measure membrane pressure drop, verify permeate quality (suspended solids < 50 mg/L, BOD5 < 50 mg/L), test system backflushing effectiveness
Area: Disinfection System Chemical Dosing Accuracy
Check: Verify chlorine/bisulphite dosing system calibration, check chemical storage levels and expiry dates, measure residual disinfectant in effluent, ensure coliform bacteria count < 200/100 ml per IMO standards
Area: Biological Process Stability and Odor/Gas Control
Check: Monitor aerobic process conditions to prevent anaerobic degradation, check for methane or hydrogen sulfide odor, verify settling tank sludge level and solids accumulation, test for absence of anaerobic gas production
Area: Effluent Discharge Quality and Regulatory Compliance
Check: Verify discharge pump operation and pressure, test effluent quality parameters (suspended solids, BOD5, coliform bacteria), confirm compliance with MARPOL 73/78 Annex IV discharge standards, check overboard discharge valve positioning

Typ-universelle Inspektionspunkte fuer Oily Water & Waste Systems (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Wärtsilä

MBR 50

50 persons · 2.2 kW · Sewage · Membrane Bioreactor (MBR)

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Compact footprint compared with conventional activated‑sludge plants
Produces effluent of very low BOD/COD, easily compliant with strict discharge limits
Low sludge production reduces handling and disposal requirements
Automated control system maintains MLSS concentration for stable operation
Proven marine heritage from Hamworthy, offering robust construction

Weaknesses

Membrane fouling can lead to permeability loss; requires regular cleaning cycles
Higher blower power consumption than simple oxidation units
Requires careful monitoring of mixed liquor suspended solids (MLSS)
Capacity limited to the design rating (≈50 m³/day), unsuitable for very large vessels with high sewage loads
Initial capital cost higher than basic septic‑tank solutions

Typical Vessels: TankerContainer shipBulk carrierCruise linerOffshore supply vessel

Decision Guide: Choose if: you need a space‑efficient system that reliably meets MARPOL Annex IV effluent limits, have sufficient power for blower operation, and can implement routine membrane cleaning. Avoid if: the vessel generates sewage volumes exceeding the MBR 50’s design capacity or operates on very limited electrical power where energy consumption is critical.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Marine STP

10-200 persons · Marine Equipment · Aerobic biological STP

Type

Biological STP

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

MARPOL Annex IV compliant without chemical additives
Compact modular design for easy installation in limited spaces
Low operating cost due to reliance on biological processes
Optional UV disinfection provides high‑quality effluent
Proven reliability with long‑life blower and pump modules

Weaknesses

Requires regular monitoring and maintenance of bacterial culture
Aeration blower is a single point of failure unless redundancy is added
Sludge handling capacity limited; frequent removal may be needed on high‑load vessels
Performance can decline in very cold water temperatures without heating
Higher initial capital cost compared with simple chemical dosing systems

Typical Vessels: Cruise shipFerryOffshore supply vesselContainer ship (crew accommodation)Oil tanker (crew quarters)

Certifications: MARPOL Annex IVDNV GL Approved

Decision Guide: Choose if: you need a chemical‑free, MARPOL‑compliant sewage solution on vessels with moderate to high crew accommodation and have space for a compact modular unit; low operating cost and routine bacterial culture maintenance are acceptable. Avoid if: the vessel experiences very high peak black‑water loads, operates in extremely cold climates without heating provision, or requires fully redundant aeration beyond the standard configuration.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Wärtsilä Hamworthy Membrane STP 25 unverified

25 PE · membrane bioreactor

Treatment Type

membrane bioreactor

Application

marine sewage treatment

Person equivalent

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy Membrane STP 50 unverified

50 PE · membrane bioreactor

Treatment Type

membrane bioreactor

Application

marine sewage treatment

Person equivalent

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy Membrane STP 100 unverified

100 PE · membrane bioreactor

Treatment Type

membrane bioreactor

Application

marine sewage treatment

Person equivalent

100

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy Membrane STP 200 unverified

200 PE · membrane bioreactor

Treatment Type

membrane bioreactor

Application

marine sewage treatment

Person equivalent

200

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy ECU 200 unverified

· electrochlorination

Treatment Type

electrochlorination

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy ECU 500 unverified

· electrochlorination

Treatment Type

electrochlorination

Application

marine sewage treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy STP Bio 50 unverified

· biological STP

Treatment Type

biological STP

Application

marine water treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy STP Bio 100 unverified

· biological STP

Treatment Type

biological STP

Application

marine water treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Wärtsilä Hamworthy STP Bio 200 unverified

· biological STP

Treatment Type

biological STP

Application

marine water treatment

Common Failures & Inspection Points

Fouling or exhausted treatment media can reduce treatment effectiveness, seen as deteriorating outlet-water quality or rising differential pressure
Dosing-pump or chemical-feed faults can interrupt treatment, noticed as unstable readings, low dosing indication or quality alarms
Blocked strainers or restricted piping can reduce flow, seen as low throughput or abnormal pump loading
Sensor drift or contamination can give incorrect control feedback, noticed as implausible readings or unnecessary alarms
Valve, seal or hose leakage can cause loss of treatment fluid or water, seen as wetness around the skid and inability to maintain normal operation

Spare Parts: Carry the maker-recommended filter elements or treatment consumables, dosing-pump service parts, seals, hoses, sensor consumables and common electrical fuses.

Use Cases: Applied to potable-water production and conditioning, domestic-water systems and other shipboard water services on merchant, passenger and offshore vessels.

Datasheet

Cruise Ships

System benefits

Customer benefits

IMO certified

No compliance problems, future proof

Exceeds USCG, HELCOM and Alaska effluent discharge standards

Cruising with peace of mind. The system meets and exceeds the likely regulatory requirements for both new and existing installations

Simple design & operation compared to submerged membrane or hybrid systems

Save time with easy maintenance

Safe, reliable operation with no coagulation, flocculation, chemical oxidants, or pH neutralisation

Operational peace of mind, lower power consumption, and no system blocking

Compact design saving space and weight

Get more space for revenue generating areas such as cabins

Remote monitoring by specialists

Feeling secure, there is always an expert at hand

Totally integrated systems for wet and dry waste

No interface issues between wet and dry waste interface

Robust construction for long life and low maintenance

Lowest possible cost of ownership

Membrane integrity is visible and secured

Easily accessible when needed

No odour emissions due to biological process

More comfort for your personnel and passengers

Complete flexibility with newbuild, conversion and retrofit options

You can receive a complete total package according to your needs

One supplier, one complete system

One point of contact, easier communication

Common Failures & Inspection Points

Blocked screens, pipes or pumps caused by unsuitable waste entering the system, producing high levels, reduced flow or pump alarms
Loss of aeration or biological-process upset, producing poor treatment performance, odour or abnormal effluent quality
Dosing or disinfection faults, producing out-of-specification treated water or chemical alarms
Level-sensor, valve or automation faults, producing overflow risk, incorrect transfers or nuisance alarms
Sludge accumulation or poor sludge handling, producing reduced treatment volume, fouling or excessive solids carry-over

Service: Inspect tanks, pumps, blowers, screens, valves, dosing equipment and sensors for fouling, leakage and correct operation. Monitor the process indicators and effluent quality required by the approved operating procedure. Check biological-process condition where applicable and avoid chemicals or waste streams that can damage the treatment process. Verify alarms, high-level protections, transfer logic and disinfection equipment. Use the exact plant manual and vessel environmental procedures for sampling, maintenance and discharge criteria.

Spare Parts: Carry pump seals, level and process sensors, dosing-pump service parts, blower service items, valve actuators and other consumables identified by the installed plant's spare-parts list. Treatment chemicals and biological-process consumables should be stocked according to the approved operating plan. Model-specific membrane, UV or other treatment components should only be carried where fitted.

Use Cases: Cruise ships and other passenger vessels with large hotel wastewater loads requiring onboard sewage and wastewater treatment.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/cruise-ships

Datasheet

Vacuum Collection Systems

Design flexibility

system can be run in any orientation, around obstacles.

Type

Marine Waste / Wastewater Treatment

Approval

IMO MEPC.227(64) / .244(66) / .295(71)

Capacity Range

10 - 1000 persons

BOD5 Removal

> 90 %

Process

Biological / chemical / MBR / vacuum

Common Failures & Inspection Points

Air leaks at toilets, valves, pipe joints or tank connections cause excessive vacuum-pump running and low-vacuum alarms
Blocked piping or foreign objects cause toilets to stop evacuating and can produce local overflows
Failed interface or discharge valves cause continuous air leakage, poor flushing or inability to transfer waste
Vacuum-pump or ejector faults cause falling vacuum and widespread toilet unavailability
Level-sensor or control faults cause collection-tank high-level alarms, incorrect pump sequencing or shutdown

Service: Trend vacuum level and pump running time because increasing duty often reveals developing air leaks. Inspect toilet/interface valves, vacuum pumps or ejectors, collection tanks, non-return valves and piping joints for leakage and blockage. Function-test high-level alarms and transfer-pump interlocks and use only approved cleaning products that will not damage seals or downstream treatment biology. Exact vacuum settings and overhaul intervals must come from the manufacturer documentation.

Spare Parts: Carry toilet/interface-valve service kits, vacuum-pump seals and wear parts, non-return valves, level sensors, solenoid valves, control fuses, pipe seals and blockage-clearing tools approved for the system. Keep compatible sanitation consumables that will not attack elastomers or disrupt the downstream sewage plant.

Use Cases: Cruise ships, ferries, merchant vessels, naval ships and offshore accommodation units using low-water-consumption vacuum sanitary collection before sewage treatment or holding.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/wastewater/vacuum-collection-systems

Datasheet

Gm Series Grease Trap

Type

Marine Waste / Wastewater Treatment

Approval

IMO MEPC.227(64) / .244(66) / .295(71)

Capacity Range

10 - 1000 persons

BOD5 Removal

> 90 %

Process

Biological / chemical / MBR / vacuum

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/wastewater/gm-series-grease-trap

Datasheet

Membrane BioReactor (MBR) Sewage System

10-200 Persons · Black/Grey Water Treatment

Voltage: 380-440V 3ph

Type

Membrane BioReactor (MBR) Sewage Treatment Plant

Size Range

MBR-10
MBR-50
MBR-100
MBR-200

Drive Type

Electric

Construction

Bioreactor tank, membrane filtration, UV disinfection, PLC control

Common Failures & Inspection Points

Membrane fouling requiring chemical cleaning
Aeration blower failure
UV lamp end-of-life
PLC control board failure
Sludge pump blockage from foreign objects

Service: Membrane cleaning (CIP) quarterly. UV lamp replacement annually. Aeration blower maintenance quarterly. Effluent quality sampling as per MARPOL Annex IV / IMO MEPC.227(64).

Spare Parts: Wärtsilä/Hamworthy. Lead time: 3-6 weeks. Membrane modules: 4-8 weeks. UV lamps: 2-3 weeks.

Datasheet

DVZ

BioSea 30

30 persons · 1.5 kW · Sewage · biological sewage treatment with chlorination

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Integrated biological and disinfection stages in one unit
Compact footprint suitable for medium‑size vessels
Automated control of aeration and chlorine dosing
Designed for continuous operation with low crew workload

Weaknesses

Chlorination tablet supply must be monitored to avoid exhaustion
Aeration capacity may be marginal on high‑load voyages
Effluent quality can deteriorate if bacterial colony health is not maintained
Limited redundancy; failure of the single aeration blower impacts performance

Typical Vessels: Bulk CarrierContainer ShipTankerGeneral Cargo VesselPassenger Ferry

Decision Guide: Choose if you need a compact, fully integrated sewage system that meets MARPOL Annex IV with minimal crew intervention and can tolerate moderate waste loads. Avoid if your vessel operates at very high sewage generation rates or requires built‑in redundancy for critical compliance periods.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Marine STP

10-500 persons · Marine Equipment · MBR sewage treatment plant

Type

MBR Sewage Treatment

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Produces effluent of very low BOD5 and pathogen levels, easily complying with the toughest discharge standards.
Compact module layout – membranes replace large secondary clarifiers, saving valuable deck space.
Reduced sludge production compared with conventional activated‑sludge systems, lowering disposal costs.
Automated membrane cleaning cycles (6–12 months) and built‑in integrity testing simplify operation.
Relatively low energy consumption per unit of treated water due to combined biological and filtration processes.

Weaknesses

Membrane fouling can increase maintenance frequency; periodic chemical cleaning or membrane replacement is required.
Higher upfront capital cost than simple aerobic treatment units.
Performance can be temperature‑sensitive; very warm sea water may accelerate fouling rates.
Requires trained personnel for routine monitoring of membrane integrity and control system diagnostics.
Spare‑part logistics for membranes and specialized pumps may be longer compared with conventional systems.

Typical Vessels: Cruise shipFerryOffshore supply vesselContainer shipTanker

Certifications: IMO Type Approval (MARPOL Annex IV)

Decision Guide: Choose if: you need consistently high effluent quality, have limited installation space, and can budget for higher capital cost with periodic membrane maintenance. Avoid if: the vessel operates in very warm waters where fouling risk is high, or if the operator lacks trained staff for MBR upkeep.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

DVZ SKA-M 25 unverified

25 PE · biological STP

Treatment Type

biological

Person equivalent

Origin

Germany

Application

marine sewage treatment

Common Failures & Inspection Points

Scale, exhausted media or dirty treatment surfaces reduce treatment effectiveness and cause poor water quality
Lamp, dosing pump, valve or power-supply faults cause loss of treatment and system alarms
Sensor, conductivity or dosing-control faults cause under-treatment, over-treatment or false indication
Filter or strainer blockage reduces flow and increases differential pressure
Seal, vessel or piping leakage causes water loss and may contaminate the treatment area

Service: Inspect treatment elements, filters, pumps, dosing equipment, sensors, valves and leakage according to the installed process. Trend water-quality results and replace or regenerate treatment media using approved procedures. Keep chemical and UV safety controls intact. Refer to the manufacturer documentation for the exact figure for dose, flow, regeneration and water-quality criteria.

Spare Parts: Carry filters, lamps or treatment media as applicable, pump seals, dosing tubing, sensors, valve parts and approved treatment consumables.

Use Cases: Potable-water disinfection, softening, mineral conditioning and domestic water treatment.

Datasheet

DVZ SKA-M 50 unverified

50 PE · biological STP

Treatment Type

biological

Person equivalent

Origin

Germany

Application

marine sewage treatment

Common Failures & Inspection Points

Scale, exhausted media or dirty treatment surfaces reduce treatment effectiveness and cause poor water quality
Lamp, dosing pump, valve or power-supply faults cause loss of treatment and system alarms
Sensor, conductivity or dosing-control faults cause under-treatment, over-treatment or false indication
Filter or strainer blockage reduces flow and increases differential pressure
Seal, vessel or piping leakage causes water loss and may contaminate the treatment area

Spare Parts: Carry filters, lamps or treatment media as applicable, pump seals, dosing tubing, sensors, valve parts and approved treatment consumables.

Use Cases: Potable-water disinfection, softening, mineral conditioning and domestic water treatment.

Datasheet

DVZ SKA-M 100 unverified

100 PE · biological STP

Treatment Type

biological

Person equivalent

100

Origin

Germany

Application

marine sewage treatment

Common Failures & Inspection Points

Scale, exhausted media or dirty treatment surfaces reduce treatment effectiveness and cause poor water quality
Lamp, dosing pump, valve or power-supply faults cause loss of treatment and system alarms
Sensor, conductivity or dosing-control faults cause under-treatment, over-treatment or false indication
Filter or strainer blockage reduces flow and increases differential pressure
Seal, vessel or piping leakage causes water loss and may contaminate the treatment area

Spare Parts: Carry filters, lamps or treatment media as applicable, pump seals, dosing tubing, sensors, valve parts and approved treatment consumables.

Use Cases: Potable-water disinfection, softening, mineral conditioning and domestic water treatment.

Datasheet

DVZ SKA-M 200 unverified

200 PE · biological STP

Treatment Type

biological

Person equivalent

200

Origin

Germany

Application

marine sewage treatment

Common Failures & Inspection Points

Scale, exhausted media or dirty treatment surfaces reduce treatment effectiveness and cause poor water quality
Lamp, dosing pump, valve or power-supply faults cause loss of treatment and system alarms
Sensor, conductivity or dosing-control faults cause under-treatment, over-treatment or false indication
Filter or strainer blockage reduces flow and increases differential pressure
Seal, vessel or piping leakage causes water loss and may contaminate the treatment area

Spare Parts: Carry filters, lamps or treatment media as applicable, pump seals, dosing tubing, sensors, valve parts and approved treatment consumables.

Use Cases: Potable-water disinfection, softening, mineral conditioning and domestic water treatment.

Datasheet

RWO Water Technologies

CS-BIO 02

Application

Marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

CS-BIO 06

Application

Marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

CS-MBR

Application

Marine membrane bioreactor sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Victor Marine

FBBR Mini

Application

Compact marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

FBBR 30

Application

Small vessel marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

FBBR 50

Application

Medium vessel marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Wärtsilä Hamworthy

Super Trident ST4A-C

Application

Marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/wastewater/super-trident-sewage-treatment-plants-stp

Datasheet

Super Trident ST10A-C

Application

Marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/wastewater/super-trident-sewage-treatment-plants-stp

Datasheet

Super Trident ST20-C

Application

Marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/waw/waste-treatment/wastewater/super-trident-sewage-treatment-plants-stp

Datasheet

Hamann

HL-CONT Compact 0125

Application

Compact marine sewage treatment plant

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

HL-CONT Plus 0125

Application

Marine sewage treatment plant - small to medium

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Scanship

SAM-E 25

25 persons · 2.2 kW · Sewage · Membrane bioreactor (MBR) sewage treatment

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Compact modular footprint suitable for limited engine‑room space
Consistently high effluent quality meeting MARPOL Annex IV limits
Low chemical dosing thanks to membrane filtration and biological treatment
Automated monthly chemical cleaning of membranes reduces manual intervention
Integrated UV disinfection provides final pathogen kill without additional chemicals

Weaknesses

Membrane fouling can increase maintenance frequency and spare‑part inventory
Higher electrical demand for aeration blower and membrane pumps compared with conventional biological plants
Initial capital cost is higher than simple septic‑tank style systems
Requires trained personnel to monitor cleaning cycles and UV lamp life
Replacement of membranes adds long‑term operating expense

Typical Vessels: Cruise shipsFerriesOffshore supply vesselsContainer ships with passenger accommodationsLNG carriers (crew accommodation areas)Research vessels

Certifications: IMO G8/15 (MARPOL Annex IV) complianceDNV GL Type Approval

Decision Guide: Choose if: the vessel operates in emission‑control areas or ports with strict sewage discharge limits, space is at a premium, and high‑quality effluent is required for environmental compliance. Avoid if: budget constraints dominate, sewage load is very low (making a simpler system sufficient), or crew expertise for membrane maintenance is unavailable.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Marine STP

100-6000 persons · Marine Equipment · Advanced Wastewater Treatment

Type

Advanced Wastewater Treatment

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Delivers >95% BOD/SS removal, complying with the strictest MARPOL Annex IV discharge standards
Compact, modular footprint suitable for limited engine‑room space on cruise ships
Proven reliability in long‑haul passenger operations with high load variability
Integrated sludge handling and automated control reduces crew workload
Scalable capacity options allow tailoring to vessel size and passenger count

Weaknesses

Electrode wear requires scheduled replacement based on operating hours, adding maintenance cost
Chemical dosing pump failures have been reported; redundancy may be needed for critical voyages
Process‑control faults can arise if the automation system is not regularly calibrated
Sludge handling system can become blocked if inlet screening is insufficient or waste streams are high in solids
Higher capital expenditure compared with basic biological sewage plants

Typical Vessels: Cruise shipFerryOffshore supply vesselLarge passenger linerHigh‑capacity coastal ro-ro

Certifications: IMO D-2 (MARPOL Annex IV)DNV class approval

Decision Guide: Choose if the vessel requires a compact, high‑efficiency system that meets the strictest discharge limits and operates under variable passenger loads; especially suitable for cruise ships where space is premium and crew training is available. Avoid if budget constraints dominate or if the operator cannot commit to regular electrode and sludge‑system maintenance.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

Selmar

BlueSea 2500

Application

Marine redox-process sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

BlueSea 12000

Application

Marine redox-process sewage treatment - large capacity

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Deyuan Marine

SWCB Type STP

Application

IMO-certified marine biological sewage treatment

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

Manufacturer Datasheet

Datasheet

Headhunter Inc.

TidalWave HMX-301LP

Application

Marine sewage treatment plant - small vessel

Common Failures & Inspection Points

Area: International Sewage Pollution Prevention Certificate (ISPPC) validity and authenticity
Check: Verify ISPPC is valid, properly issued for vessel size (≥400GT or ≥15 persons), signed and endorsed by flag state authority, not expired
Area: Sewage treatment plant IMO type approval certificate missing or invalid
Check: Confirm STP holds valid IMO MEPC 227(64) certificate (or MEPC 159(55) for older units), check certification class (STP type approval letter), verify not lapsed
Area: Direct sewage discharge valve not sealed or incorrectly secured
Check: Inspect discharge valve seals, verify valve is sealed shut when in port or within 3 nautical miles from shore, confirm mechanical lock/weld, check pump discharge isolation
Area: Sewage treatment plant not operational or inadequate capacity for crew
Check: Test plant start-up sequence, verify blower/pump operation, check aeration and treatment tank water levels, confirm adequate treatment time (typically 8-15 hours retention), measure actual vs. design capacity, review operational log
Area: Monthly effluent quality testing records missing or deficient (BOD, COD, TSS, E.coli)
Check: Request last 12 months of effluent test reports, verify parameter compliance with MEPC 227(64) limits (BOD ≤25mg/L, COD ≤125mg/L, TSS ≤35mg/L, fecal coliform <250 CFU/100mL), check testing lab certification, confirm disposal location recorded

Typ-universelle Inspektionspunkte fuer Sewage Treatment Plant (verifiziert, 2026-06).

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.headhunterinc.com/product/tidalwave-hmx-sewage-treatment-plant-imo-227-64-approved/

Datasheet

Jets

Vacuumarator 60

60 persons · 3.0 kW · Sewage · Vacuum-based biological treatment

Common Failures & Inspection Points

Scale, membrane fouling, biological growth or dirty optical surfaces reduce treatment capacity or water quality
Pump, vacuum, lamp, blower or power-supply faults cause low production, low treatment intensity or shutdown
Conductivity, salinity, level or treatment sensors drift and cause false acceptance, rejection or alarms
Seal, gasket or piping leakage causes loss of pressure, vacuum or visible water leakage
Pretreatment, strainer or discharge blockage causes unstable flow and poor process performance

Spare Parts: Carry filters, strainers, pump seals, membrane or UV parts where applicable, sensors, valve parts, blower service items and approved treatment consumables.

Strengths

Highly effective in removing pollutants and contaminants from wastewater
Compact design suitable for smaller vessel spaces
Low energy consumption compared to other treatment methods

Weaknesses

Requires regular maintenance of vacuum generator and brushes
May not be as effective in high-flow or variable-load situations
Potential for clogging if not properly maintained

Typical Vessels: Cruise shipsFerriesOffshore support vessels

Certifications: IMO MEPC.227(64)USCG Type Approval

Decision Guide: Choose if: You require a compact, low-energy treatment solution for smaller vessel spaces. Avoid if: You expect high-flow or variable-load wastewater conditions.

Use Cases: Freshwater production, potable-water conditioning, hydrophore service and sewage treatment.

Datasheet

JETS Vacuum (Norway)

Vacumarator Sewage System

10-300 Persons · Black Water (Vacuum System)

Voltage: 380-440V

Type

Vacuum Toilet + Sewage Treatment System

Size Range

JETS 10
JETS 50
JETS 100
JETS 300

Drive Type

Electric (vacuum pump)

Construction

Vacuum toilets, collection tank, vacuum pump, treatment unit

Common Failures & Inspection Points

Vacuum pump failure (diaphragm wear)
Vacuum valve leakage causing loss of vacuum
Discharge pump blockage
Treatment unit biological process upset
Sensor/control failure

Service: Vacuum pump maintenance quarterly. Vacuum valve test monthly. Treatment unit biological parameters monitoring weekly. Discharge sampling per MARPOL.

Spare Parts: JETS Vacuum (Hareid, Norway). Lead time: 2-4 weeks.

Datasheet

RWO / Veolia (Germany/France)

Biological Sewage Treatment Plant

10-100 Persons · Black Water Treatment

Voltage: 380-440V

Type

Biological Sewage Treatment Plant (Extended Aeration)

Size Range

STP-10
STP-25
STP-50
STP-100

Drive Type

Electric

Construction

Biological reactor, aeration system, settling tank, chlorination/UV

Common Failures & Inspection Points

Biological process upset from chemical contamination
Aeration system blockage
Chlorinator malfunction
Sludge buildup from infrequent desludging
Effluent quality deterioration during low-occupancy periods

Service: Biological parameters monitoring weekly (DO, pH, TSS). Desludging when sludge level >50%. Chlorinator chemical supply check monthly. Effluent sampling per MARPOL.

Spare Parts: RWO/Veolia (Bremen). Lead time: 2-4 weeks.

Datasheet