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(C) In the process of sewage treatment,the activated sludge is pumped into large tanks called anaerobic sludge digesters. In these tanks,other kinds o

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Digester tank

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(C) In the process of sewage treatment,the activated sludge is pumped into large tanks called anaerobic sludge digesters. In these tanks,other kinds of bacteria,which grow anaerobically,digest the bacteria and the fungi in the sludge. During this digestion,bacteria produce a mixture of gases such as methane,hydrogen sulfide,and carbon dioxide. These gases form biogas,which can be used as a source of energy. Therefore,the anaerobic sludge digester is also known as a digester tank.

Select the appropriate option regarding the anaerobic sludge digester.

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