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The domestic sewage in large cities...

The domestic sewage in large cities

A

has a high BOD as sit containing both acrobic and anaeobic bacteria

B

is proceesed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs).

C

when treated in STPs does not really require the aeration step as the sewage adequate oxygen.

D

has very high amount of suspended solids and dissolved salts .

Text Solution

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The correct Answer is:
B
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