- layer of filter sand
- couche filtrante en sable f
Dictionary of Engineering, architecture and construction – materials & technologies, 2nd edition, la Maison du dictionnaire. 2007.
layer of filter sand
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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
Filter (aquarium) — Aquarium filters are critical components of both freshwater and marine aquaria.cite book |last=Riehl |first=Rüdiger. Editor. |coauthors=Baensch, HA |title=Aquarium Atlas |year=1996. 5th Edn. |publisher=Tetra Press |location=Germany |isbn=3 88244… … Wikipedia
filter — n. & v. n. 1 a porous device for removing impurities or solid particles from a liquid or gas passed through it. 2 = filter tip. 3 a screen or attachment for absorbing or modifying light, X rays, etc. 4 a device for suppressing electrical or sound … Useful english dictionary
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
filter — /ˈfɪltə / (say filtuh) noun 1. any device in which cloth, paper, porous porcelain, or a layer of charcoal or sand, is held and through which liquid is passed to remove suspended impurities or to recover solids. 2. any of various analogous devices …
filter bed — noun filter consisting of a layer of sand or gravel for filtering water • Hypernyms: ↑filter … Useful english dictionary
filter bed — /ˈfɪltə bɛd/ (say filtuh bed) noun a layer of sand, gravel, charcoal, etc., in a pond, tank, or container, which serves to filter impurities out of the water which flows through it …
filter bed — noun a tank or pond containing a layer of sand or gravel, used for filtering large quantities of liquid … English new terms dictionary
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
Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… … Wikipedia
