Alfa Laval is introducing a new UV reactor size to the Alfa Laval PureBallast 3 family. Optimised for 50% more flow than the current largest reactor size, the 1,500-m3/h version will enable streamlined and cost-effective configurations for tankers and other vessels with large ballast water flows.
The 1,500-m3/h reactor will join an existing PureBallast 3 range that comprises 170, 300, 600 and 1,000-m3/h reactor sizes. Alone or in combination, the reactors enable PureBallast 3 system flows of 32–3,000 m3/h, with multiple systems handling even larger capacities.
With the introduction of the 1,500-m3/h reactor, PureBallast 3 systems will become even more optimised for large ballast water flows of 1,000 m3/h or more. This may strengthen a trend that can already be seen among tankers and other vessels with large ballast water flows, where electrochlorination is giving way to UV ballast water treatment.
“Many shipowners are reconsidering what they’ve been told about ballast water treatment for large flows,” said Alfa Laval head of PureBallast Anders Lindmark. “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 1,500-m3/h reactor.”
An even better fit for UV advantages
UV treatment is chemical-free, poses no risk of corrosion and has low operating costs. These advantages are relevant no matter what the vessel size, and they come into greater focus when the physical systems compete on footprint and cost.
“UV ballast water treatment systems can be both smaller and more cost-effective to install than electrochlorination systems, even for large flows,” said Mr Lindmark. “With the existing reactor portfolio for PureBallast 3, Alfa Laval has been in a strong competitive position and has received many orders for large-flow systems. But the new 1,500-m3/h reactor will provide an even better fit, right at the optimal intersection of biological effect, system size and power requirements.”
Reduced complexity and cost in installation
Above all, the 1,500-m3/h reactor will mean a reduction in the already small number of reactors used by PureBallast 3 for large flows. A 3,000-m3/h system will be achieved with just two reactors, for example, while a 1,500-m3/h system will go from two reactors to one.
“The fewer reactors involved, the lower the complexity and cost of installing the ballast water treatment system,” Mr Lindmark said. “For a system flow of 1,500 m3/h, for example, we’ve previously had to install reactor capacity for 2,000 m3/h. Now one reactor will do the full job, without over-dimensioning and with a considerable reduction in installation costs.”
The lowest cost of ownership
In the case of a 1,500-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 1,500-m3/h reactor, a 1,200-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,” said Mr Lindmark, who pointed out that UV operating costs are already lower than those for electrochlorination systems. “When it comes to ballast water treatment for large flows, the 1,500-m3/h reactor doesn’t just strengthen our offering. It truly changes the equation for UV.”
• To learn more about Alfa Laval PureBallast 3 and Alfa Laval’s approach to ballast water treatment, visit www.alfalaval.com/pureballast