Last Updated: Apr 2012


A wet scrubber is estimated to cost between $2 million and $12 million per ship, depending on the size and the type of the ship.

Dry scrubbers cost around $120 per KW. Maintenance is max 2% of investment cost per annum.

In June, 2011 Siim Kallas, Vice-President of the European Commission in charge of Mobility and Transport, suggested EU members states should even consider giving financial incentives to ship operators to help them meet the cost of retro-fitting scrubbers.


While most trials have been conducted on land, there have been a number of successful trials at sea. Here are some examples:

In April 2012 Wärtsillä Hamworthy announced an agreement with Wilh. Wilhelmsen ASA to retrofit their vessel MV Tamesis with a multi-stream Krystallon Exhaust Gas Cleaning System (EGCS).


In February 2012, Alfa Laval: signed a contract with Spliethoff to retrofit a multiple inlet PureSOx exhaust gas cleaning system on board one of the Dutch company's vessels. It is the first order received by Alfa Laval for such a multiple inlet system, which will be the first retrofit to use just one scrubber to clean the exhaust gases for the main, as well as the auxiliary engines, of the vessel.


In December, 2011 Hamworthy Krystallon announced that the first of four vessels installed with the company's seawater scrubbers for Italian ship owner Ignazio Messina & Co has come on line.

Ecospec Global Technology has developed a 'closed loop' system that can operate on fresh water and has been installed on a ship operating on the Great Lakes.


Couple Systems GmbH Systems: In December 2009 Couple Systems installed their first exhaust gas cleaning system DryEGCS. Tests of the system onboard the 6,389 deadweight tonne (dwt) freighter the MS Timbus began in November. The system was shown to reach a 99% SOx reaction at the ideal working temperature.


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