REVERSE OSMOSIS (RO)
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.
- Used to remove salts
- For water purification from sea water and many other applications and industries
- TDS removal > 98%
- Pilot plant available
How does it work?
The process of reverse osmosis (RO) uses the special characteristics of semi-permeable membranes which allow water (or other solvents) to pass through while retaining the molecules and ions of dissolved matter. In normal conditions, when this kind of membrane is inserted between an aqueous solution and water, the difference in pressure between the two pushes the solvent through the membrane in the direction of the solution (direct osmosis).
The separation of the solvent from the solute is due to the difference in pressure which is obtained by applying greater pressure to the higher concentrated solution than to the other side of the membrane (reverse osmosis). The bigger the difference in pressure, the faster the solution will pass through the membrane.
Reverse osmosis allows industry to carry out water purification and pollutes concentration without a change of status and with a low consumption of energy. The separation process occurs in pressure vessels containing membrane elements and using hydraulic pressurization of the feed water. Two different flows are created under the influence of the pressure. The first flow (orthogonal) occurs through the membrane elements and results in a “permeate” (A diluted substance poor in salts and organic substances). The second flow (tangential) flows over the surface of the membranes but does not pass though; increasing in concentration of salts, etc. as it passes along the membrane surface. This solution is known as the “concentrate”.