First certified SOx scrubber orders

Sustainability assured 2011In order for its customers to meet the new reduction targets for marine sulphur emissions that were decided by the International Maritime Organization (IMO) in October 2008, Wärtsilä aims to deliver optimal and cost-efficient solutions. These may be based on the use of low-sulphur fuels, sulphur scrubbers, or LNG as fuel. Wärtsilä has extensive experience from delivering exhaust gas scrubbers for stationary power plants, and now also offers such solutions for ships.

The Wärtsilä scrubber concept works with fresh water in a closed-loop system in which sulphur oxides are neutralised with caustic soda. A small amount of scrubbing water is extracted to remove contaminants in a treatment unit on board, thereby fulfilling all the quality and monitoring requirements stipulated by the IMO. In the so-called zero discharge mode, the clean effluents are led to a holding tank for scheduled and periodical discharge. Contaminants are always disposed of at reception facilities in port. Wärtsilä is the first manufacturer to have been awarded a marine scrubber certificate by the classification societies Det Norske Veritas, Germanischer Lloyd and Bureau Veritas.

In 2010, the Finnish company Containerships ordered a fresh water scrubber for installation after the main engine on their “Containerships VII” vessel. The installation was completed during 2011. In 2011, Wärtsilä was awarded a contract to supply propulsion systems and integrated fresh water scrubbers for a series of six vessels for the Canadian owner Algoma Central Corporation. The vessels are being built to transport bulk commodities on North America's Great Lakes and St. Lawrence Seaway.

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