New 1500 m3/​h reactor for Alfa Laval PureBallast 3 will handle large ballast water flows with even greater efficiency

Malcolm Latarche
Malcolm Latarche

04 September 2018


Alfa Laval is introducing a new UV reactor size to the Alfa Laval PureBallast 3 family. Optimized for 50% more flow than the current largest reactor size, the 1500 m3/h version will enable streamlined and cost-effective configurations for tankers and other vessels with large ballast water flows.

The 1500 m3/h reactor will join an existing PureBallast 3 range that comprises 170, 300, 600 and 1000 m3/h reactor sizes. Alone or in combination, the reactors enable PureBallast 3 system flows of 32–3000 m3/h, with multiple systems handling even larger capacities.

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With the introduction of the 1500 m3/h reactor, PureBallast 3 systems will become even more optimized for large ballast water flows of 1000 m3/h or more. A 3000 m3/h system will be achieved with just two reactors, for example, while a 1500 m3/h system will go from two reactors to one.

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“Many ship owners are reconsidering what they’ve been told about ballast water treatment for large flows,” says Anders Lindmark, Head of Alfa Laval PureBallast. “Heating needs, tanks for high-salinity water and the management of chemicals add size, complexity and cost for electrochlorination systems. PureBallast 3 is already highly competitive for large flows – and will be even more so with the 1500 m3/h reactor.”


Having fewer reactors will reduce the complexity and cost of installing a large-flow ballast water treatment system. Since UV systems are already smaller and more cost-effective to install than electrochlorination systems, this may further shift the balance towards UV among tankers and other vessels with large ballast water flows.

In the case of a 1500 m3/h system, the new reactor will mean not only a reduction in footprint, but also improved OPEX through a substantial reduction in power consumption. When updating the range of PureBallast 3 configurations, however, Alfa Laval has kept lifecycle cost in focus. Although it could be constructed with the 1500 m3/h reactor, a 1200 m3/h system will be more energy efficient with two 600 m3/h reactors, thus ensuring the lowest costs over time.

“With five reactor sizes, we can fine-tune PureBallast 3 systems for any flow range,” says Lindmark. “When it comes to ballast water treatment for large flows, the 1500 m3/h reactor doesn’t just strengthen our offering. It truly changes the equation for UV.”