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Question : Whatare the variousconstituents of domesticsewage? Discuss the effects of sewagedischarge on a river .

Answer»

SOLUTION :Sewagecontainshumanand animal excreta , foodresiduces, detergentsand otherorganic wastes . It isalwaysrich in BACTERIA and other biological pollutants . DISCHARGE of sewageinto a riverraises the BOD , leadingto the killingsof fishes and otheraquaticlife .Waterpolluted with sewage alosbecomes a potent souceof many WATER BORNEDISEASE .


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