Help needed: malfunction of activated sludge in the aeration tank
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The sludge concentration in the aeration tank is low now
The sludge death in your case is quite severe, and there are many reasons for this
The preliminary judgment is that the sludge has bulged excessively or has aged.
It is caused by severe aging of the sludge or sludge poisoning; identify the cause as soon as possible. Suggestions: 1. Reduce aeration volume and increase recirculation ； 2. Increase nutrition by adding glucose or flour; if there is a lack of nitrogen or phosphorus, urea, compound fertilizers, phosphate, etc. can be used to supplement it. 3. An intermittent operation mode can be adopted, which helps to accelerate the recovery of the system.
What is the dissolved oxygen level? What is the inlet load? Has it been examined under a microscope? No, just pull in some mud directly and adjust it gradually.