Reverse Osmosis System | Desalination

Reverse osmosis is a filtering method that eliminates many of the large molecules and ions from solutions by applying pressure to the solution, when it is on the opposite side of the selective membrane. The result is that the solute is the constant pressure of the membrane and the pure solvent can change sides. This film does not allow large molecules or ions through the pores, but should allow for smaller parts of the flow of the solution.

In normal osmosis process, of course, the solvent enters the area of ​​low concentration of solutes through a membrane to an area with a high concentration of solute. Mobility of the pure solvent to compensate for the solute concentration on both sides of the film and this creates pressure is the osmotic pressure. The application of external pressure to reverse the natural flow of pure solvent, which is reverse osmosis.

The process is similar to that of membrane filtration. However, there are fundamental differences between reverse osmosis and filtration. The dominant removal mechanism of membrane filtration, fixed, or the entire exclusion, so that the process can theoretically achieve a complete exclusion of particles, regardless of operating parameters such as degree of pressure and concentration.

Reverse osmosis, however, involves a delivery mechanism for the separation efficiency depends on the concentration of solutes pressure and water flow rate. Reverse osmosis is most commonly known for its use in purifying drinking water from sea water by removing salts and other substances from water molecules.

Osmosis is a natural process. When two liquids of different concentrations are separated by a semi permeable membrane, the liquid tends to move up, to balance the concentrations of the solute chemical potential.

Formally, reverse osmosis is the process of forcing a solvent from a region of high solute concentration through a semi permeable membrane in an area of ​​low solute concentration by applying a pressure greater than osmotic pressure.

Membranes used in reverse osmosis have a dense barrier layer in the polymer matrix where most separation occurs. In most cases, is a film designed for water only through this dense layer while avoiding transport solutes.

This process requires high pressure exercised on the high concentration of the membrane, usually 2 to 17 bar for fresh and brackish water, and 40 to 82 bars of seawater, which has about 27 bars natural osmotic pressure must be overcome.

In reverse osmosis, in a configuration similar to osmosis are the pressure areas of high concentration. In this case, there are two forces that affect the movement of water pressure caused by the difference in solute concentration between the two chambers and the external pressure applied.

This process is known for its use in desalination to remove salt and other minerals from seawater to obtain fresh water. Ph:  +91-44-28362461 - 71
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