Activated sludge common problems and countermeasures

In the severe situation of water resources, the control of water treatment is relatively strict. Therefore, the common problems and countermeasures of the activated sludge process in the water treatment process are also valued by many people. Here are some explanations:

Sludge swelling problem
The expansion of filamentous bacteria The expansion of non-filamentous bacteria
Solution
1. Emergency measures: (1) Increase of flocculants (2) Use of disinfectant oxidants
2. Change the process: (1) Set the selector (2) Also change the reactor form (3) Process operation regulation

Sludge floating problem
Sludge removal from nitrogen
Sludge goes up
Disintegration of sludge
Solution
1. Decrease the residence time in the secondary sedimentation tank, drain mud in time, and increase the reflux ratio.
2. Increase the amount of oxygen in the aeration tank, increase dissolved oxygen in the effluent, reduce the residence time of the sludge in the secondary sedimentation tank, and drain the sludge in time.

Disintegration of sludge
Sludge poisoning
Excessive aeration, excessive sludge oxidation
Solution
1. The system's influent load should be reduced, and the solution should be reduced. The amount of excess sludge should be reduced. When the amount of aeration is increased, the sludge activity is restored. At the same time, the sources of pollution are investigated and the source of poison is blocked.
2. Reduce the amount of aeration and shorten the residence time of the sewage in the aeration tank.

Bubble problem
Solution
The aeration tank shall be sprayed with clean water pipe network, sprayed with tap water or treated sewage, and antifoaming agents such as activated silicon, engine oil and kerosene shall be properly added.