Dinoflagellates before and after treatment with the PureBallast system. After treatment, the cell membrane is disrupted and the organism’s chlorophyll has disappeared. This means that it cannot reproduce and is no longer viable. PureBallast, Alfa Laval’s chemical-free system for ballast water treatment, was developed in cooperation with Wallenius Water and launched in December 2006. In July of this year, the system received IMO Active Substance Final Approval, which confirms non-toxic operation and paves the way for the final stage of the Ballast Water Type Approval process. Just one month later, Alfa Laval has signed a contract for four PureBallast systems to be installed on vessels owned by German ship owner E.R. Schiffahrt.