First slide

Microbes in Sewage Treatment

Question

Identify the treatment process in a sewage treatment plant that helps to reduce the BOD in sewage matter.

Easy

A

Primary treatment
B

Secondary treatment
C

Tertiary treatment
D

Chemical treatment

Solution

In secondary treatment or biological treatment the sewage water is treated till the BOD is reduced. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria.

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