RWO says that this certificate is awarded by The United States Coast Guard (USCG) and is considered to be the crucial supporting requirement for future purchasing decisions of shipowners and yards. RWO is a subsidiary of subsidiary of Veolia Water Solutions & Technologies.Martyn Ayris, managing director of RWO commented: “The AMS is a very important certificate for us. Being chosen by USCG as one of the first companies to receive it again confirms the technical refinement of our CleanBallast system and demonstrates that our two-stage treatment concept with its advanced process steps is a mature technology - providing the necessary reliability to make owners and their fleets ready for future challenges.”In addition, last September the Bremen-based manufacturer also received Product Design Assessment (PDA) Certificate from Germanischer Lloyd for its ballast water treatment system. Presently the CleanBallast technology has been selected by customers from Belgium, China, Canada, Cyprus, France, Germany, Hong Kong, Japan, South Korea and the Netherlands for a variety of vessels including container, bulker, heavy lift, RoCon, multi-purpose and tankers.