Trickling filter
a bed of gravel or pebble media through which clarified effluent percolates and microbial activity removes BOD, suspended solids and ammoniacal nitrogen ...
Trickling filter: A wastewater treatment unit that contains medium material with bacteria. The stream of wastewater is trickled over the medium and the bacteria break down the organic wastes. Bacteria are collected on the filter medium.
Trickling Filter: A coarse treatment system in which wastewater is trickled over a bed of stones or other material covered with bacteria that break down the organic waste and produce clean water.
trickling filter media The solid material in a trickling filter that provides a surface for a biological film of microorganisms. Crushed stone is the most commonly used media, but plastics are gaining popularity.
Trickling filter An attached growth biological process in which the microbial film is attached to non-moving rock or plastic media.
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It is accomplished by bringing together waste, bacteria, and oxygen in trickling filters or in the activated sludge process.
Secondary treatment. Generally, a level of treatment that produces 85 percent removal efficiencies for biological oxygen demand and suspended solids. Usually carried out through the use of trickling filters or by the activated sludge process.
 See also: Soil, Water, Pollutant, Waste, Wastewater
  
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