Desal Supplies

Unit 9, Canal Street Works

Rochdale, Lancs, OL11 1AB

Tel: +44 (0)1706 869777 / Email:

Reverse Osmosis (RO) filtration was originally developed in the late 1950’s and early 1960’s for the desalination of brackish water and seawater to produce potable (drinking) water.
By the 1970’s it was gaining acceptance as a viable process for municipal potable water production.  Since then the technology has improved and the range of applications has multiplied, it is now commonly used for the purification of water across a diverse range of applications from the production  of semi-conductirs and pharmaceuticals to the generation of power and potable water supplies.
Reverse osmosis works at a molecular level with a preference to allow smaller molecules/ions to pass through the membrane whilst inhibiting the passage of larger molecules/ions and organic components 
The phenomenon of osmosis occurs when two solutions of different concentrations are separated by a semi permeable membrane, the ‘purer’ solution will migrate through the membrane and dilute the more concentrated solution until they reach equilibrium.
Reverse osmosis occurs by artificially applying a pressure (usually by using a pump) to the more concentrated solution, this results in the passage of fluid through the membrane to the dilute solution; in passing through the membrane the salts in the concentrate are retained so producing the dilute solution.