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Reverse Osmosis

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The process of reverse osmosis allows you to perform purification and concentration operations physically and without changes in status, with a low consumption of energy. The separation process is obtained by means of a hydraulic system of pressurisation for the fed substance to be treated, and membrane-type devices, called modules, which creates two different flows under the influence of the pressure. The first flow (orthogonal) goes through the membrane, at the exit it is poor in salts and organic substances; while the second flow (tangential) flows over the surface layer before the membrane, in order to oppose the tendency of the solution to be more concentrated near the surface.

How does it work?

At the inside of the modules (especially if placed in series) the concentration increases gradually from the inlet to the outlet, the permeated flow will get progressively worse. It is therefore clear that the actual performances of the plant in terms of productivity and quality (concentration) of the parameter depend also on the recovery factor (or conversion factor). Such a factor describes the quantity ratio between permeated flow and fed substance.