The Reverse Osmosis Systems Supplier tells you how reve […]
The Reverse Osmosis Systems Supplier tells you how reverse osmosis works. Reverse osmosis uses high pressure pumps to increase the pressure on the RO salt side and forces water through the semi-permeable RO membrane. Almost all (about 95% to 99%) dissolved salts remain in the waste stream. The pressure required depends on the salt concentration of the feed water. The thicker the feed water, the greater the pressure required to overcome the osmotic pressure.
Desalination water demineralized or deionized water is referred to as permeate (or product) water. A stream of water carrying concentrated contaminants that do not pass through the RO membrane is referred to as a waste (or concentrated) stream.
When the influent enters the RO membrane under pressure (sufficient pressure to overcome the osmotic pressure), water molecules pass through the semipermeable membrane, and salts and other contaminants are not allowed to pass through and exit through the waste stream (also known as concentrate or brine flow) In some cases it may enter the drainage or may be fed back into the feedwater supply to be recirculated through the RO system to conserve water. The water that passes it through the RO membrane is referred to as permeate or product water, and typically has about 95% to 99% dissolved salts removed therefrom.
It is important to understand that the RO system uses cross-filtration rather than standard filtration where contaminants are collected in the filter media. By cross-filtration, the solution passes through the filter, or through the filter, with two outlets: the filtered water flows in one direction, and the contaminated water flows in the other direction. To avoid the accumulation of contaminants, cross-flow filtration allows water to sweep away contaminant buildup and also allows for sufficient turbulence to keep the membrane surface clean.