activated-sludge process
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activated-sludge process
(′ak·tə′vād·əd ′sləj ′prä′səs)
(civil engineering) A sewage treatment process in which the sludge in the secondary stage is put into aeration tanks to facilitate aerobic decomposition by microorganisms; the sludge and supernatant liquor are separated in a settling tank; the supernatant liquor or effluent is further treated by chlorination or oxidation.
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