sewage filter

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• filter bed — n. a tank, covered trench, etc. with a sand or gravel bottom, used to filter water, sewage, etc …   English World dictionary

• Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …   Wikipedia

• sewage system — Collection of pipes and mains, treatment works, and discharge lines (sewers) for the wastewater of a community. Early civilizations often built drainage systems in urban areas to handle storm runoff. The Romans constructed elaborate systems that… …   Universalium

• filter bed — noun Date: circa 1874 a sand or gravel bed for filtering water or sewage …   New Collegiate Dictionary

• filter-bottom block — noun : a hollow vitrified salt glazed clay block used in the floors of trickling filters in sewage treatment plants …   Useful english dictionary

• filter fly — noun : any of a number of long legged hairy bodied two winged flies (family Psychodidae) common about sewage filters …   Useful english dictionary

• 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

• 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

• 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

• trick|ling filter — «TRIHK lihng», a tank filled with crushed rocks on which sewage is distributed so that it comes in contact with bacteria that change the organic material in the sewage to less harmful substances as it trickles down through the layer of rocks …   Useful english dictionary

• Anaerobic filter — In sewage treatment systems, an anaerobic filter (AF) is a form of anaerobic digester. The digestion tank contains a filter medium where anaerobic bacterial populations organisms that live in the absence of air can establish themselves. Such… …   Wikipedia