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Question

Aeration of water during wastewater treatment removes which of these?



A

Human waste

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B

Bacteria

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C

Germs

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D

Insoluble things

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Solution

The correct option is B

Human waste


In biological treatment of sewage water, microbial flocs (group of aerobic bacteria associated with fungi forming a mesh like network) are used in treatment of partially treated effluent in aeration tanks. Aeration of wastewater facilitates the growth of aerobic bacteria which can degrade the solubilised and suspended organic matter in sewage water. Hence they specifically act on organic wastes like human wastes, animal wastes, kitchen wastes etc,

Biology

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