activated-sludge process

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.
References in periodicals archive ?
Note that evidence of the removal of "solubilized" and bioavailable substrates is not a limiting factor in the activated-sludge process.

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