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Ballast Water Treatment Technology

UPDATED: USCG type-approval ‘in H1 2018’ for latest Alfa Laval BWMS

Thu 09 Nov 2017 by Paul Gunton

UPDATED: USCG type-approval ‘in H1 2018’ for latest Alfa Laval BWMS
Alfa Laval’s PureBallast Compact Flex is 20% smaller than other systems in the range (credit: Alfa Laval)

Alfa Laval expects to secure US Coast Guard (USCG) type-approval for the latest version of its PureBallast ballast water management system (BWMS) in the first half of 2018.

It launched its PureBallast 3.1 Compact Flex at the end of September and put it on public display during the Kormarine Exhibition in South Korea in late October, but it will need its own USCG type-approval, even though other models of its PureBallast 3.0 and PureBallast 3.1 were covered by the certificate issued last December.

Alfa Laval global business manager, PureBallast, Marine & Diesel division, Kristina Effler, told BWTT that the new version is based on the skid version of the already-type-approved system.

In a statement to mark Kormarine, Alfa Laval claimed its PureBallast 3.1 to be “the leading ballast water treatment technology” and said that it had managed to reduce the footprint of its PureBallast 3.1 by 20%. It also has a “plug-and-play concept for quick and easy connection”, the company said, which enables a 10% reduction in installation costs.

Ms Effler explained that the size reduction had been achieved by merging the lamp drive and control cabinets into a single electrical cabinet for systems up to 300 m3/h. In addition, the cleaning-in-place (CIP) unit has a different and more compact design, referred to as Compact CIP. “These changes not only contribute to a smaller footprint, but also enable a more flexible installation,” she said.

In addition to the headline 20% reduction, its footprint has also been reduced by removing two booster pumps. One was eliminated because of a change in the start-up process, the other due to the use of air cooling, which also does away with a closed cooling unit.

“These changes further simplify installation and reduce the costs for both installation and prior engineering,” she added. The reactor and filter remain much the same, with only a few negligible changes, she added.

Reducing the size of what was already the smallest system on the market, Alfa Laval believes, makes it attractive for retrofit installations for the vast majority of vessels, especially where space is at a premium. It is also attractive for newbuilding projects, it said, where “it can be difficult to incorporate a treatment system into the already cramped engineroom.”

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