Wärtsilä Aquarius UV Manta - Raising the bar for ballast water filtration
How our filter systems work Water enters the vessel through the seachest and is pumped by the ballast pump to the first stage of the treatment system, the filter. At the filter, the water is first prefiltered to remove large particles and debris. The particles less than 1mm then enter the filtration chamber where they pass from the inside of the screen out to the filter body. After filtration, the seawater is ready to go to the secondary stage to be treated before filling the ballast tanks. As the water passes through the filter, organisms and dirt are trapped on the inside of the screen. A differential pressure sensor measures the amount of debris trapped on the screen and triggers the automatic self-cleaning cycle when the screen needs cleaning. During the self-cleaning cycle, the organisms and dirt on the screen are suctioned by the nozzles back through the scanner arm and deposited by the flushing system overboard. After cleaning, the differential pressure returns to normal and the automatic cleaning cycle resets until the next time the screen needs to be cleaned.
Components & Design
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Technical Data
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Common failures & inspection points
Six-monthly visual inspection of absorber for signs of erosion and corrosion; pressure test of spray headers (low pressure = erosion); inspection for wear on venturi walls and deflector plates
Weekly inspection of spray headers and header on plugging or erosion; inspection of liquid pressure gauges to detect abnormally low pressures (indicator of erosion); six-monthly internal inspections for plugged or eroded nozzles
Annual full service and calibration of all sensors by certified technicians; regular inspection for probe fouling and sensor sensitivity; calibrate CEMS and water monitoring systems per manufacturer specifications
Continuous monitoring of inlet and outlet water quality; documentation of pH (min. 6.5), PAH, turbidity, temperature (max. 60°C); annual sampling to be performed no later than after first year of operation; 3-year retention of all test results
Wall thickness measurements of all effluent pipes and overboard lines at every annual class survey (DNV requirement); visual inspections for signs of corrosion and erosion; inspection of integrity of pipe supports and welds; particular attention to acid corrosion prior to seawater dilution
Six-monthly internal inspections of mist eliminator for fouling, plugging and corrosion; inspection for solids accumulation in eliminator; functional test of eliminator washdown systems; cleaning or replacement when damaged
Type-general inspection and maintenance points for this equipment category — not model-specific.
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