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What are the various constituents of d...

What are the various constituents of domestic sewage ? Discuss the effects of sewage discharge on a river .

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Sewage contains human and animal excreta , food residuces, detergents and other organic wastes . It is always rich in bacteria and other biological pollutants . Discharge of sewage into a river raises the BOD , leading to the killings of fishes and other aquatic life .Water polluted with sewage alos becomes a potent souce of many water borne disease .
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