The effluent from the secondary sedimentation tank is clear, but it contains sludge particles, commonly known as \"floating sludge\". How can this be resolved?
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This post was last edited by zhaolijun on 2015-6-7 at 10:27. The water is clear but contains sludge particles, commonly known as \"floating sludge\". The main reasons for this are: a low F/M ratio and insufficient nutrients for bacteria； The DO level is too high, indicating an excessive degree of oxidation ； Slight aging of sludge ； The c/n/p ratio is not appropriate. Are there any other influencing factors? How should this be resolved?
Low F/M ratio, insufficient bacterial nutrients； The bacteria become smaller, the pellicle particles are smaller and their sedimentation capacity decreases, causing them to flow away with the water ； Increasing nutrients or reducing the DO level in MLSS leads to excessive reaction depth ； Excessive oxidation of sludge causes bacteria to undergo auto-oxidation and become smaller in size ； Reduce dissolved oxygen or shorten aeration time; slightly age the sludge ； Increase sludge removal, reduce DO levels, and supplement nutrients; the C/N/P ratio is inappropriate – adjust it to at least 100:5:1