There are many types of ballast water treatment systems for large vessels, and as more than 10 billion tons of ballast water are carried by the world’s ships each year, they play a very important role. Without ballast water treatment systems, the transport of harmful pathogens and micro-organisms would seriously threaten marine ecosystems.
The two most significant regulations on ballast water treatment have been implemented by the International Maritime Organization (IMO) and the United States Coast Guard (USCG).
While IMO type approval will be required globally as soon as the convention enters into force, USCG approval is already required for all equipment and vessels entering US waters.
Currently only the Optimarin Ballast Water Management System (BWMS) equiped with the BOLLFLTER Automatic Type 6.18.3 has received USCG type approval.
There are numerous solutions for BWMS on large ships. To protect these multi-stage systems for the treatment of ballast water, for the majority of the systems, automatic prefiltration of the sea water taken on board is mandatory. For this, a fine filter is installed between a coarse separator and the chemical or physical disinfection unit. The task of this is to remove organisms, as well as sediment from the ballast water.
The BOLLFILTER Automatic Type 6.18.3 for automatic prefiltration of seawater presents an inexpensive top technology for new construction and for retrofitting and provides solid prefiltration for ballast-water treatment systems.