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Activated sludge
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==Purpose== [[Image:Activated Sludge 1.svg|thumb|upright=1.25|A generalized, schematic diagram of an activated sludge process.]] [[File:Activated sludge addition to membrane bioreactor (5729651741).jpg|thumb|Activated sludge addition (seeding) to a pilot scale membrane bioreactor in Germany]] [[File:Mikrofoto.de-Belebtschlamm 6.jpg|thumb|Activated sludge under the microscope]] [[File:Moscow Kuryanovo wastewater plant asv2018-08.jpg|thumb|Aerial photo of Kuryanovo wastewater treatment plant in [[Moscow]], Russia]] The activated sludge process is a biological process used to [[oxidise]] [[biotic material|carbonaceous biological matter]], oxidising nitrogenous matter (mainly [[ammonium]] and [[nitrogen]]) in biological matter, and removing [[nutrients]] (nitrogen and phosphorus).
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