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  2. Portable water purification - Wikipedia

    en.wikipedia.org/wiki/Portable_water_purification

    The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

  3. Brita (company) - Wikipedia

    en.wikipedia.org/wiki/Brita_(company)

    The company secured the first patent for domestic water filter use in the 1970s. [7] In 1988, [8] The Clorox Company, based in Oakland, California, entered in a licensing-and-distribution agreement with the German company for North and South America. In 1995, it added the Canadian rights by acquiring Canada's Brita International Holdings.

  4. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    The clarified water is then fed through a high-pressure piston pump into a series of RO vessels. 90.00–99.98% of the raw water's total dissolved solids are removed and military standards require that the result have no more than 1000–1500 parts per million by measure of electrical conductivity.

  5. 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 ...

  6. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Groundwater: The water emerging from some deep ground water may have fallen as rain many tens, hundreds, or thousands of years ago. Soil and rock layers naturally filter the ground water to a high degree of clarity and often, it does not require additional treatment besides adding chlorine or chloramines as secondary disinfectants.

  7. China fumes at U.S. as Panama pulls out of key ... - AOL

    www.aol.com/china-fumes-u-panama-pulls-122618691...

    Panama's decision to leave a key investment deal with China has drawn accusations from Beijing of "pressure and coercion" by the Trump administration.

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