There are currently only nine ballast water treatment systems awaiting US Coast Guard type-approval. Without any new additions, 2021 could mark the end of a process that started in September 2016
On 20 September 2016, the US Coast Guard received its first application for type-approval of a ballast water treatment system. The first application was from Optimarin of Norway for its OBS ballast water treatment system, beating Alfa Laval of Sweden, which submitted its application for PureBallast 3.0 just one day later.
In the end, the one day did not make a big difference, as Optimarin became the first ballast water treatment system to be type-approved on 2 December 2016, with Alfa Laval certified 21 days later on 23 December 2016.
Since then, applications for USCG type-approval have been numerous – over 40 ballast water treatment systems have been type-approved by the US Coast Guard for use in US waters.
But the application rate has slowed down. There are currently only nine ballast water treatment systems on the US Coast Guard review list and only five of these are first timers.
The other four are ballast water treatment systems that have already been type-approved, but have had modifications that require re-approval.
The five first timers are, HiBallast NF (Hyundai Heavy Industries), Purestream (Atlantium Technologies), NiBallast (Jiangsu Nanji Machinery), NGT BWMS (Norwegian Greentech), and CleanBallast OBS (RWO GmbH).
RWO GmbH applied for type-approval for its CleanBallast OBS ballast water treatment system on 27 July 2021, and type-approval is likely in 2021.
If no further applications are made, CleanBallast OBS is in the front runner for the title of last ballast water treatment system type-approved by the US Coast Guard.