Which of the following is put into an anaerob | vedclass

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(A) During sewage treatment,the sediment from the primary settling tank is called primary sludge. The sediment from the secondary treatment (biologica

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Activated sludge

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(A) During sewage treatment,the sediment from the primary settling tank is called primary sludge. The sediment from the secondary treatment (biological treatment) is called activated sludge. $A$ small part of the activated sludge is pumped back into the aeration tank as inoculum,while the remaining major part of the activated sludge is pumped into large tanks called anaerobic sludge digesters. In these digesters,other kinds of bacteria,which grow anaerobically,digest the bacteria and the fungi in the sludge.

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

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