Which of the following is put into Anaerobic sludge digester for further sewage treatment?
Primary sludge
Floating debris
Effluents of primary treatment
Activated sludge
The sediment in the settlement tank is called activated sludge. A small part of the activated sludge is pumped back into the aeration tank. The remaining major part of the sludge is pumped into a large tank called anaerobic sludge digesters.
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