Help needed regarding the A/O process technology for ammonia synthesis
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We use the A/O process to treat wastewater from the plant; although the amount of sludge produced is low recently, the levels of ammonia nitrogen and COD treated are still within acceptable limits. The day before yesterday, the O2 tank changed from earthy yellow to brownish-black and developed a muddy odor; there was a large amount of dead sludge in the secondary sedimentation tank. I’m not sure what’s going on – are there any effective ways to solve this problem?
Reasons such as excessively high COD levels, sludge poisoning, too low pH value, and insufficient oxygen supply – let’s analyze these factors.
1: The COD level won’t be high. 2: The pH is around 8, not low; oxygen supply is being increased, but it’s unclear what’s causing sludge poisoning
During operation, pay constant attention to pH and dissolved oxygen; if possible, monitor COD, ammonia nitrogen, as well as nitrate and nitrite regularly.
Reply to 4# wxp8182: Thank you. I have another question – apart from excessive aeration and nutrient imbalance, are there any other reasons why sludge does not grow over time?
Nitrifying bacteria reproduce very slowly; you can find information on this in books and forums. It is recommended to take a look at \"Operation Management and Countermeasures for Abnormalities in Biological Wastewater Treatment\".