First slide

Microbes in Sewage Treatment

Question

What does high Biochemical Oxygen Demand in a water body indicate?

Easy

A

The pollution in the water is very less.
B

The water is pure and lacks any organic matter.
C

The water is highly polluted.
D

The water in the water body is fit for drinking.

Solution

Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature. Higher the BOD greater the pollution in the water body.

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