what is reverse osmosis process?
Reverse osmosis is a water purification process. I want to know the correct description of the said process.
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Reverse osmosis is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure.
http://www.epa.gov/nrmrl/pubs/625r96009/625r96009.pdf
In RO you are basically pressure filtering the salt from the water by using a membrane with incredibly tiny holes. Some fresh water goes through the tiny holes, and the rest of the water, with all the salt, is bled off as waste brine.
Looks like DuSh!t’s Permasep business went away [truly awful management decisions], but I think Dow may still be making RO membranes.
Reverse osmosis is known as hyper-filtration, and is the most thorough type of filtration available. Although water filtration is the most common usage, reverse osmosis is also used to purify other liquids such as ethanol and glycol.
The reverse osmosis water filter can remove particles as small as dissolved ions from the water supply. It stops virtually every contaminant. Typically, there are at least three stages in a reverse osmosis filter. Water is first forced through a small prefilter, which strains out sediment, and then it is passed through a membrane to screen out smaller contaminants. The last phase is a carbon filter. Between these three elements, the reverse osmosis water filter will eliminate a wide variety of contaminants, including minerals, bacteria and viruses, and provide a constant supply of fresh, clean water at low cost.