A scrubber is used for cleaning ship exhaust emissions, particularly with regard to sulfur oxides (SOX). By scrubbing (wash) exhaust in a fine spray of seawater, emissions of acidifying sulfur oxides to the atmosphere are reduced. The water is very acidic (about pH 3, compared with seawater natural about pH 8) and can contain other contaminants such as heavy metals and organic pollutants. Today there are no independent studies of the potential effects on the marine environment of emissions of scrubber water.
The foundation Sveriges Sjömanshus and Chalmers Area Transport have funded our scrubber which is used both in research and practice.