Activity issues of sludge in petrochemical and biochemical treatment
Thread Content
At present, the ammonia nitrogen treatment capacity of our company’s biochemical treatment system is less than half of what it should be; the COD can be treated normally. These days, large amounts of foam have appeared in the anaerobic tank and aeration tank, and it is difficult to eliminate this foam. I request your suggestions on how to handle this, thank you
The surface of the anaerobic tank is usually covered with foam generated by denitrification; this foam is sticky and difficult to remove.
Denitrification foam generally does not appear on the surface of the aerobic tank, although this can happen when the *AO acid levels are high and the DO is below 0. Denitrification can also occur in case of 5 ； The sticky foam on the surface of the aerobic tank is usually caused by incomplete degradation of organic matter and sludge poisoning.
1. As mentioned above, foam in anaerobic tanks generally increases in quantity as denitrification progresses; this foam is sticky, difficult to break apart, and tends to form scum easily； 2. If foam appears in the aerobic tank and it is quite sticky, it may be due to denitrification taking place in the aerobic tank, which results in foam similar to that produced in the anaerobic tank ； Incomplete degradation of organic matter or shock from organic load ； Early stage of activated sludge growth ； Activated sludge poisoning ；
Let’s start with the data, the microscopic examination results. Does the poster mean that everyone should list all possible reasons, and then compare them one by one based on the actual situation?
Personally, I think it’s due to incomplete degradation of organic matter or a sudden increase in organic load. Pay attention to adding nutrients and checking for any significant changes in the water inflow.