activated sludge


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Related to activated sludge: Trickling filter, activated sludge method

activated sludge

[′ak·tə‚vād·əd ′sləj]
(civil engineering)
A semiliquid mass removed from the liquid flow of sewage and subjected to aeration and aerobic microbial action; the end product is dark to golden brown, partially decomposed, granular, and flocculent, and has an earthy odor when fresh.

activated sludge

Sewage sediment that has been subjected to vigorous aeration and the action of microorganisms.
References in periodicals archive ?
MLVSS concentration, detention time (e) and DO were varied during the course of the study keeping into consideration the generally applied range in activated sludge process for industrial effluent treatment (Pooja, 2014; Zahrim et al.
Disintegration of excess activated sludge by hydrogen peroxide oxidation, Desalination, 246: 275-284.
Superior advantages of sequencing batch reactors than conventional activated sludge processes are flexible operation and the fact that there is no liquid or solids recycling for the treatment of complex wastewater.
But the performance of activated sludge system with extended aeration in removing cysts and parasite eggs were more than the activated sludge system with conventional aeration.
For more information on Biowater Technology and to find out how to upgrade an existing activated sludge plant visit, http://www.
The respiration rate of activated sludge is an important variable for the control of activated sludge process, because oxygen consumption is directly associated with both biomass growth and substrate removal [20].
Activated sludge is a well-known biomass used for the purification of some industrial effluents and domestic wastes.
Concentration amounts were higher in effluent from STPs that used traditional activated sludge treatment; in contrast, effluent from plants that used advanced ozonation as tertiary treatment contained significantly lower OC levels (37.
During the test period, aerobic digested sludge's pH was almost neutral and the returned activated sludge had a very poor acidic property (pH=6.

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