User talk:Ayazattari

reverse osmosis plant pakistan,R.O.Tack water tecchnology

What is Reverse Osmosis (RO)?

A. Reverse Osmosis is a process where water is demineralized using a semipermeable membrane at high pressure. Reverse osmosis is osmosis in reverse. So, what is osmosis? Osmosis is most commonly observed in plants. If you don't water your plants they wilt. A plant cell is a semipermeable (water flows through the membrane but salts don't) membrane with the living stuff on the inside in a salt solution. Water is drawn into the cell from the outside because pure water will move across a semipermeable membrane to dilute the higher concentration of salt on the inside. This is how water is drawn in from the ground when you water your plants. If you salt your plants (over fertilize or spill some salt on the grass), the plant will wilt because the salt concentration on the outside of the cell is higher than the inside and water then moves across the membrane from the inside to the outside.

To reverse this process, you must overcome the osmotic pressure equilibrium across the membrane because the flow is naturally from dilute to concentrate. We want more pure water so we must increase the salt content in the cell (concentrate side of the membrane). To do this we increase the pressure on the salty side of the membrane and force the water across. The amount of pressure is determined by the salt concentration. As we force water out, the salt concentration increases requiring even greater pressure to get more pure water.