How to deal with sludge bulking?
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The sludge at our sewage treatment station has expanded significantly recently. I would like to ask how to deal with it?
I have encountered similar situations. Sludge expansion will cause sludge loss, index increases, etc. We must first do a good job in control. The most effective method is to add coagulant at the outlet of the aerobic tank. At the beginning, we used polymerized ferric sulfate and polyacrylamide together, and the effect was good. The second step is to find the cause, solve it as soon as possible, and then make adjustments according to the cause. It should be noted that after adding coagulant, the sludge can settle in the secondary sedimentation tank, but after the sludge returns to the aerobic tank, the sludge will still float after several cycles. Therefore, the cause must be investigated as quickly as possible and the sludge must be properly discharged.
http://www.91ep.com/Article/wrts/tsjs/200601/Article_1297.html This is a research paper I have seen before on the control of sludge expansion in oxidation ditch. You can open it directly. I hope it will be helpful to you.
To solve the problem of sludge expansion, we must first know the causes of sludge expansion. There are many factors that cause sludge expansion. We must identify the culprit causing the expansion, cut off the source of poison, and treat the symptoms but also the root cause, in order to completely solve the problem of sludge expansion. There are many ways to solve the problem of sludge expansion. As explained clearly on the second floor above, targeted solutions are more accurate, faster and more reliable than general ones.