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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. LifeSaver bottle - Wikipedia

   en.wikipedia.org/wiki/LifeSaver_bottle

   The bottle's interchangeable filter can purify between 4,000 and 6,000 litres (1,050 to 1,585 gallons) before it stops working and needs to be replaced. [2] It filters out objects bigger than 15 Nanometres—including viruses, bacteria, and cysts.

4. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Portable water purification devices and methods are available for disinfection and treatment in emergencies or in remote locations. Disinfection is the primary goal, since aesthetic considerations such as taste, odour, appearance, and trace chemical contamination do not affect the short-term safety of drinking water.

5. Sand filter - Wikipedia

   en.wikipedia.org/wiki/Sand_filter

   The filter sand takes up most space of the chamber. It sits either on a nozzle floor or on top of a drainage system which allows the filtered water to exit. 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.

6. 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. [33] The remainder is discharged, usually into the drain. Because wastewater carries the rejected contaminants, recovering this water is not practical for household ...

7. Coway (company) - Wikipedia

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

   Coway Co., Ltd. (Korean: 코웨이 주식회사)is an international manufacturer of household appliances, water purifiers, air purifiers, bidets, water softeners, and mattresses from South Korea. [ 2 ] [ 3 ] [ 4 ] Founded and headquartered in Seoul, Coway is the largest water purifier company in the country and owns subsidiaries in Malaysia ...