Mechanism of Sea Water Desalination

On average, sea water has a salinity of about 3.5%. Sea water desalination involves the removal of salts and other impurities from sea water by using specific membrane processes or by vaporizing sea water to produce fresh water.

One such membrane process is Reverse Osmosis, by which sea water, subjected to pressure, is forced against a commercially produced semi-permeable membrane (reverse osmosis membrane) in the reverse osmosis membrane module, leaving the impurities behind, thus providing fresh water.