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slow sand filter

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  • Slow sand filter — Slow sand filters are used in water purification for treating raw water to produce a potable product. They are typically 1 to 2 metres deep, can be rectangular or cylindrical in cross section and are used primarily to treat surface water. The… …   Wikipedia

  • slow sand filter — A bed of sand through which water slowly flows; the gelatinous microbial layer on the sand grain surface removes waterborne microorganisms, particularly Giardia, by adhesion to the gel. This type of filter is used in some water purification… …   Dictionary of microbiology

  • Sand filter — Sand filters are used for water purification. There are three main types; # rapid (gravity) sand filters # upflow sand filters # slow sand filters All three methods are used extensively in the water industry throughout the world. The first two… …   Wikipedia

  • Rapid sand filter — The rapid sand filter or rapid gravity filter is a type of filter used in water purification and is commonly used in municipal water treatment facilities. Rapid sand filters use relatively coarse sand and other granular media to remove particles… …   Wikipedia

  • Filter (chemistry) — In domestic food and drink preparation where bulk solids are removed from liquids, this is often called a strainer. Filtrate is the liquid produced after filtering a suspension of a solid in a liquid.Filtrand (or Residue) is the solid residue… …   Wikipedia

  • filter — filterer, n. /fil teuhr/, n. 1. any substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid or gas is passed to remove suspended impurities or to recover solids. 2. any device, as a tank or tube,… …   Universalium

  • Media filter — Peat Sand Filter in United States. The filter treats stormwater runoff from a residential area. Stormwater from streets is first routed to a small detention basin (rear of photo, behind berm), which removes coarse sediment. After filtration an… …   Wikipedia

  • Water filter — A water filter is a device which removes impurities from water by means of a fine physical barrier, chemical process and/or biological process. Filters are used to cleanse water for irrigation, drinking water, aquariums, and swimming pools.… …   Wikipedia

  • McMillan Sand Filtration Site — The District of Columbia government is considering redevelopment plans for the McMillan Park and sand filtration site which is no longer used for water treatment. McMillan Park and Sand Filtration Site is a twenty five acre green space and… …   Wikipedia

  • BioSand Filter — BioSand Water Filters are a technological adaptation of the centuries old slow sand filtration process. While implementations exist in many different sizes and varieties, the most common design is intended for use in rural homes where naturally… …   Wikipedia

  • Lava filter — A lava filter is a biological filter that uses lavastone pebbles as support material on which microorganisms can grow in a thin biofilm. [ [http://www.stowa selectedtechnologies.nl/Sheets/Sheets/Lava.Filters.html Overview of lavafilters] ] This… …   Wikipedia


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