Question

Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.

Options

• sedimentation tank; grit chambers

• anaerobic bioreactor; grit chambers

• primary sedimentation tank; aeration tank

• aeration tank; anaerobic sludge digesters

Answer 1

Small part of activated sludge is passed back into aeration tank and major part is pumped into large tanks called anaerobic sludge digesters.