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Question : List theevents thatreducethebiologicaloxygendemand (Bod)ofa promary effluent during sewage treatment .

Answer»

Solution :theevents thatreducethe BODOF a PRIMARY effuent are :
1. theprimary effluentis passed intolargeaerationtanks whereit ismechanically agitatedand airispumped into it .
2.Mechanical agitationof primary efuent leadsto gowth of aerbic MICROBES whichreduces the BOD.


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