How to fix a problem of ...

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How to fix a problem of Sludge bulking in waste water treatment plant

Sludge bulking is cumulation of suspended solids, not connected to low DO. WHile it is true that sludge(both organic and inorganic) consumed DO there's no sense to  connect the low DO and the sludge bulking. In principle, you will have your sludge through time and the thing to do is to remove it. It will be easy to remove such by identifying if your sludge is cationic or anionic then you can add the sufficient amount of  specific coagulant then filter it out.

 

Thanks. I hope Im able to help.