Listing ID #4138662
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Reverse osmosis (RO) is a filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective," this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.
In the normal osmosis process the solvent naturally moves from an area of low solute concentration, through a membrane, to an area of high solute concentration. The movement of a pure solvent to equalize solute concentrations on each side of a membrane generates a pressure and this is the "osmotic pressure." Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis. The process is similar to membrane filtration. However, there are key differences between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Reverse osmosis, however, involves a diffusive mechanism so that separation efficiency is dependent on solute concentration, pressure, and water flux rate. Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other substances from the water molecules.
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| Advantages of RO |
| Operating cost less than DM plant for TDS higher than 600ppm. |
| Ease of operation |
| Variation in TDS does not significantly alter performance of RO |
| Better purification |
| In addition to dissolved salts, RO removes colloids, organics and bacteria |
| Varied applications        RO can be used to recycle and reuse treated waste water. |
| Superior Performance |
| Variation in TDS does not significantly after performance of Reverse Osmosis |
| Better Purification |
| Modular in Construction |
| Expand Capacity at Minimunm Cost |
| In addition to dissolved salts, RO Remove Colloids, Organics and Bacteria |
| RO can be used to recycle and reuse treated waste water |
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| Applications |
| Reduction in Total Dissolved Solids (TDS) |
| Recovery of water for reuse from    Cooling Tower blowdown    Boiler blowdown    Treated Effluents (Industrial/Sewage) |
| Retrofitting for performance enhancement of existing DM plant |
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Recycle of treated waste water  Special Features - Product flow rate 1.2 - 60 m3/h. - Salt rejection ranges from 90 - 98% depending upon feed water composition. - Product recovery ranges from 50 - 80% based on feed water composition. - Concentrate discharge directed to drain at 'O' psi. - Possible to hook up sophisticated instruments and controls Advantages - Modular design - capacity can be increased to suit requirements. - Fully assembled skid, tested prior to shipment, ease of installation and beneficial use. - Non-corrosive low pressure piping – virtually maintenance free. - Low on energy consumption. - User friendly unit - does not require continuous monitoring. Applications - Ultra pure water for electronic industries - Ultrapure water for pharmaceutical industries - Process water for manufacturing plants - Boiler feed water - Beverage and food processing industry - Drinking water - Waste water - Mineral water Specifications - Poly propylene cartridge housing pre-filter. - FRP pressure vessels. - Spiral wound membrane elements of polyamide type. - 16 stainless steel multistage pump. - TEFC pump motor. - 316 stainless steel high pressure piping - Low feed pressure switch for pump protection. - High feed pressure switch for membrane & pump protection. - Motor starter with disconnect switch. - Motor contactor with thermal overload protection. - Concentrate check valve. - Product check valve. - Automatic feed shut-off valve. - Cleaning connections. - Full control panel instrumentation. - Pump discharge pressure indicator. - Feed and concentrate pressure indicator. - Product and concentrate flow meters. - Conductivity meter. - Power on light. - Fault alarm. - Post shutdown system flush. |
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