2 near marine >> Continued from p. 1 The confident choice Alfa Laval PureBallast 3 is the leading ballast water treatment technology, providing unmatched biological disinfection performance in the most challenging waters. Optimal BWTS configurations for tankers and more 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 other system flows will go from two reactors to one. Having fewer reactors will further reduce the complexity and cost of installing a large-flow ballast water treatment system. 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. The 1500 m3/h reactor will join an existing range of 170, 300, 600 and 1000 m3/h reactor sizes. Alone or in combination, the reactors enable system flows of 32–3000 m3/h, with multiple systems handling even larger capacities. NOx compliance and savings: EGR water treatment with a difference Alfa Laval PureNOx technology has long been the choice for water treatment in Exhaust Gas Recirculation (EGR). In response to the global sulphur cap, it will soon be available in two solutions – PureNOx LS (Low Sulphur) and PureNOx HS (High Sulphur). Built on Alfa Laval’s leading separation expertise, PureNOx technology has been proven in thousands of hours of EGR operation in Tier III compliance. Now it will be channelled into two different solutions, optimized according to fuel sulphur level. On vessels using low-sulphur fuel, PureNOx LS will clean the EGR bleed-off water before overboard discharge. Experience shows that EGR process water cleaning is not needed with low-sulphur fuel, which allows for a setup much like a bilge water system. On vessels using high-sulphur fuel, PureNOx HS will continue cleaning the process water. However, the presence of a scrubber on board will mean bleed-off can be handled by the scrubber system. With only one type of water to clean, each water treatment system can be smaller and optimized for more cost-efficient EGR. In addition, both support Eco EGR mode, which can result in fuel savings of up to 6 g/kWh in Tier II operation.
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