The offshore industry acknowledges its obligations regarding the environment and engineers are searching for sustainable solutions that reduce the ecological footprint. Bawat presents a simple, yet efficient BWMS technology based on pasteurization.
OFFSHORE BWMS TECHNOLOGY
ABOUT Pasteurization
Pasteurization was invented by French scientist Louis Pasteur in 1862. Pasteur discovered that heating beverages was enough to kill most of the bacteria that caused spoilage, preventing these beverages from turning sour. Today, pasteurization is still used widely in the dairy industry and other food processing industries to achieve food preservation and food safety.
How we use pasteurization
Bawat BWMS is based on unique patented technology, that represents maybe the simplest solution to an ecological and regulatory issue within the international shipping industry.
The heart of the Bawat system is the pasteurizing unit. Here, the ballast water is heated to a certain temperature via plate heat exchangers. Depending on the treatment temperature applied, ballast water is kept at this elevated temperature for a short period. The combination of elevated temperature and retention time in the pasteurizing unit ensures efficient elimination of all living organisms.
Within the regeneration section of the unit, the already treated ballast water pre-heats the in-coming water resulting in low power requirements and high energy efficiency.
Circulation treatment
NITROGEN IS INJECTED
Ballast water is pumped from just below water surface into the pasteurizing unit. The treated water is re-introduced into the same tank through jet nozzles close to the tank's bottom. When the water is led back to the ballast tank nitrogen is injected.
ONE-PASS
DE-BALLASTING TREATMET
One pass through the system and ballast water is ready for discharge
ONE-PASS
TANK-TO-TANK TREATMENT
Ballast water is shifted from one tank to a clean tank through the pasteurization unit.
ONE-PASS
BALLASTING TREATMENT
Ballast water is pumped from the sea to the pasteurizing unit and then to a clean ballast tank.
ONE-PASS MOBILE
DE-BALLASTING TREATMENT
Exploiting the efficiency of the one-pass mobile solution, untreated ballast water is pumped from a ballast tank through the mobile BWMS unit and directly overboard.
