Alfa Laval PureBallast 3, the third generation of Alfa Laval’s ballast water treatment technology, has received an updated type-approval from the US Coast Guard (USCG) that reduces the holding time in US waters.
Holding time is a designated interval between the completion of ballast water uptake and the start of ballast water discharge and many BWMS have a mandatory holding time when operating under USCG legislation – despite having no such requirement under IMO legislation.
The new certificate makes it possible for vessels to deballast in United States waters with a holding time of just 2.5 hours.
“We are committed to keeping operations simple, even under the more complicated USCG legislation,” said Alfa Laval head of PureBallast Anders Lindmark.
“The new, and dramatically reduced, holding time for PureBallast 3 removes a key frustration when operating in United States waters.”
The reason UV treatment systems have had holding times in United States waters is the difference in testing methods used by IMO and the USCG to verify biological disinfection performance.
The recent signing into law of the Vessel Incidental Discharge Act (VIDA) paves the way for the USCG to re-evaluate the IMO-endorsed method.
If the USCG decides to accept the same testing principle used by IMO, suppliers of UV treatment systems will likely be able to reapply for USCG type-approval based on the IMO testing methodology.
“Alfa Laval is closely following the developments related to VIDA, but we have chosen not to wait for a change in the USCG legislation,” said Mr Lindmark.