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  2. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Around the world, household drinking water purification systems, including an RO step, are commonly used for improving water for drinking and cooking. Such systems typically include these steps: a sediment filter to trap particles, including rust and calcium carbonate; a second sediment filter with smaller pores

  3. Ceramic water filter - Wikipedia

    en.wikipedia.org/wiki/Ceramic_water_filter

    A Victorian ceramic water filter. Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, [1] and portable ceramic filters are commonly used in backpacking. [2]

  4. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    Water filters produced in Toledo, Ohio in 1895 out of terracotta A large-scale flocculation 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 ...

  5. Sand filter - Wikipedia

    en.wikipedia.org/wiki/Sand_filter

    The pre-treated raw water enters the filter chamber on the top, flows through the filter medium and the effluent drains through the drainage system in the lower part. Large process plants have also a system implemented to evenly distribute the raw water to the filter. In addition, a distribution system controlling the air flow is usually included.

  6. Point of use water filter - Wikipedia

    en.wikipedia.org/wiki/Point_of_use_water_filter

    Point of use water filters are used in individual houses or offices to provide filtration of potable water close to the point of consumption. [1] The related topic, point-of-use water treatment describes full-scale water treatment options and technologies designed to serve communities when municipal water treatment fails or is unavailable.

  7. Nanofiltration - Wikipedia

    en.wikipedia.org/wiki/Nanofiltration

    NF units in drinking water purification range from extremely low salt rejection (<5% in 1001A membranes) to almost complete rejection (99% in 8040-TS80-TSA membranes.) Flow rates range from 25 to 60 m 3 /day for each unit, so commercial filtration requires multiple NF units in parallel to process large quantities of feed water. The pressures ...

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