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  2. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Household RO units use a lot of water because they have low back pressure. Household RO water purifiers typically produce one liter of usable water and 3-25 liters of wastewater. [34] The remainder is discharged, usually into the drain. Because wastewater carries the rejected contaminants, recovering this water is not practical for household ...

  3. Reverse osmosis plant - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis_plant

    Reverse Osmosis plant at an oil field RO production train, North Cape Coral RO Plant. A reverse osmosis plant is a manufacturing plant where the process of reverse osmosis takes place. Reverse osmosis is a common process to purify or desalinate contaminated water by forcing water through a membrane.

  4. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Complete removal of ions from water is possible if the right conditions are met. The water is normally pre-treated with a reverse osmosis unit to remove non-ionic organic contaminants, and with gas transfer membranes to remove carbon dioxide. A water recovery of 99% is possible if the concentrate stream is fed to the RO inlet.

  5. Portable water purification - Wikipedia

    en.wikipedia.org/wiki/Portable_water_purification

    Instead of using the static pressure of a water supply line to force the water through the filter, pressure is provided by a hand-operated pump. These devices can generate drinkable water from seawater. The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows ...

  6. LifeStraw - Wikipedia

    en.wikipedia.org/wiki/LifeStraw

    Use of LifeStraw. The original LifeStraw is a plastic tube 22 centimetres (8 + 5 ⁄ 8 in) long and 3 centimetres (1 + 1 ⁄ 8 in) in diameter. [8] Water that is drawn up through the straw first passes through hollow fibres that filter water particles down to 0.2 µm across, using only physical filtration methods and no chemicals.

  7. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation , accessible drinking water , public and private aquariums , and the safe use of ponds and swimming ...

  8. Slingshot (water vapor distillation system) - Wikipedia

    en.wikipedia.org/wiki/Slingshot_(water_vapor...

    Slingshot is a water purification device created by inventor Dean Kamen. [1] Powered by a Stirling engine running on a combustible fuel source, it claims to be able to produce drinking water from almost any source [2] by means of vapor compression distillation, [3] requires no filters, and can operate using cow dung as fuel.

  9. History of water filters - Wikipedia

    en.wikipedia.org/wiki/History_of_water_filters

    Hippocrates believed that water had to be clean and pure. Rainwater was the best water, but had to be boiled and strained before drinking to get rid of the "bad smell" and to avoid hoarseness of the voice. [3] [4] He designed a crude water filter to “purify” the water he used for his patients. Later known as the “Hippocratic sleeve ...

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