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  2. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Brackish water reverse osmosis (BWRO) is the desalination of water with less salt than seawater, usually from river estuaries or saline wells. The process is substantially the same as SWRO, but requires lower pressures and less energy. [1] Up to 80% of the feed water input can be recovered as fresh water, depending on feed salinity.

  3. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    The most common means for removing water hardness rely on ion-exchange resin or reverse osmosis. Other approaches include precipitation methods and sequestration by the addition of chelating agents. Distillation and reverse osmosis are the most widely used two non-chemical methods of water softening.

  4. Water reuse in California - Wikipedia

    en.wikipedia.org/wiki/Water_reuse_in_California

    Reverse osmosis is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. Currently, reverse osmosis is the technology by which water reuse is made possible, in conjunction with filtering methods for larger solids (e.g., screens and settling tanks), other ...

  5. Raw water - Wikipedia

    en.wikipedia.org/wiki/Raw_water

    [4] [12] This efficiency has made reverse osmosis the primary method of water purification, often being used in combination with other methods, as a final treatment. A downside to reverse osmosis is that the removing of most minerals from water can have negative effects on its taste. [12] Minerals are sometimes added to drinking water that was ...

  6. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Distillation removes all minerals from water, and the membrane methods of reverse osmosis and nanofiltration remove most to all minerals. This results in demineralised water which is not considered ideal drinking water. The World Health Organization has investigated the health effects of demineralised water since 1980. [32]

  7. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Dalecarlia Water Treatment Plant, Washington, D.C. Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment.

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