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Which of the following is put into Anaerobic sludge digester for further sewage treatment ?

a) Effluents of primary treatment

b) Activated sludge

c) Primary sludge

d) Floating debris
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1 Answer

 
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b) Activated sludge

Explaination::

Major portion of activated sludge is pumped into large tanks called anaerobic sludge digesters. So, here other kinds of bacteria which grow anaerobically, digest the fungi and bacteria of the sludge.
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