Optimarin Ballast Systems (OBS) have gained approval from the United States Coast Guard (USCG) slashing their required holding time from 72 to just 24 hours for all salinities. The certification ensures the systems are optimized for short sea shipping routes in the US, as the time between ballast water treatment (BWT) and de-ballasting is cut dramatically.
USCG requires a holding time post treatment for environmentally friendly UV systems. This is to ensure all cells are inactive before testing. However, with increased UV doses, such as those provided by OBS’ powerful 35kW lamps, the holding time can be reduced, thus enabling greater vessel flexibility.
“This is another endorsement of OBS by the USCG, which will itself be utilizing our technology in its new Offshore Patrol Cutter programme,” comments Optimarin CEO Tore Andersen. “Our system was the first to gain full USCG approval and now it boasts the current minimum required holding time for UV-based solutions. This will have a major impact for shipowners trading between domestic ports in the US.”
Systems with three day holding times are required to wait for that duration before discharging treated water at port – meaning vessels may have to anchor and interrupt operations if conducting short voyages. The efficacy of the 50-3,000m3/h OBS, however, ensures short turnarounds and optimal efficiency for shipowners trading in North American waters.