As fresh water supplies dwindle, the use of sea water becomes more attractive. New technologies are making reverse osmosis (RO) a more effective and cost-efficient method for desalination. Utilizing an effective pretreatment system to improve the quality of the feed water traveling through the RO membranes will aid in improving the performance of your membrane system.
RO refers to a type of water purification process that uses semipermeable membranes that block passage of particles, bacteria, and colloids, and through which water molecules diffuse freely in relation to dissolved constituents (such as dissolved salts, silica, boron, and many organic impurities). Because of this special property, under the influence of an applied hydraulic pressure and at a pressure differential higher than the osmotic pressure of the source water, the membranes allow passage of water while excluding passage of water impurities.
Evoqua Water Technologies is a global leader in helping to improve the world’s water resources. Water Online spoke with Alain Silverwood of Evoqua to understand how the right pretreatment process can reduce costs while improving water quality.