What are the reasons for sludge floating?
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Recently, when testing the sludge settling ratio, it was observed that the sludge in the aerobic tank kept floating to the surface, with a settling ratio of around 10%
Generally, when performing SV tests, a layer of sludge floats on the surface; this may be due to anaerobic conditions or the use of a 100 ml measuring cylinder； SV rises during sedimentation or 30 minutes later, which indicates denitrification has taken place ；