GATE Civil Engineering (CE) 2011 Solved Paper
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Question Numbers: 64-65
The sludge from the aeration tank of the activated sludge process (ASP) has solids content (by weight) of 2 %. This sludge is put in a sludge thickener, where sludge volume is reduced to half. Assume that the amount of solids in supernatant from the thickener is negligible, the specific gravity of sludge solids is 2.2 and the density of water is 1000 kg/m3.
The sludge from the aeration tank of the activated sludge process (ASP) has solids content (by weight) of 2 %. This sludge is put in a sludge thickener, where sludge volume is reduced to half. Assume that the amount of solids in supernatant from the thickener is negligible, the specific gravity of sludge solids is 2.2 and the density of water is 1000 kg/m3.
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