In large cities,domestic sewage ............
- Ahas high $BOD$ as it contains both aerobic and anaerobic bacteria.
- Bis processed in sewage treatment plants through primary aerobic and then secondary anaerobic processes.
- Cdoes not require aeration when processed in $STP$ because it contains sufficient oxygen.
- Dcontains large amounts of suspended solids and dissolved salts.
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Select the correct statement from the following:
Given below are two statements about sewage. Based on them,select the correct option given below.
Statement $I$: The sediment in the settling tank is called floc.
Statement $II$: Sewage is first passed in the grit chamber,then it is screened.
Statement $I$: The sediment in the settling tank is called floc.
Statement $II$: Sewage is first passed in the grit chamber,then it is screened.
Which of the following statements is incorrect regarding sewage treatment?
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View SolutionIn a sewage treatment plant,primary treatment is
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View SolutionWhat is digested in the anaerobic sludge digester?
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