The sedimentation tank has a large black sludge floating up

- Jul 02, 2019-


The sedimentation tank has a dead angle, and the local mud is anaerobic, producing CH4 and CO2, and the bubbles are attached to the sludge particles to float upward, and the ammonia nitrogen of the effluent is often higher;

The reflux ratio is too small, and the sludge reflux is not anaerobic in time.


If the sedimentation tank has a dead angle, the problem that the system can maintain a high dissolved oxygen state can be alleviated, and the fundamental solution needs to be structurally modified to achieve the dead angle;

Increase the reflux ratio to prevent the sludge from staying in the sedimentation tank for too long.