When does the BOD level in effluent decrease? | vedclass

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Question

(B) The $BOD$ (Biochemical Oxygen Demand) refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were o

Vedclass · Accepted Answer

The $BOD$ level decreases because bacteria and other microorganisms consume the majority of the organic matter present in the water.

Vedclass · Answer

(B) The $BOD$ (Biochemical Oxygen Demand) refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria. During the secondary treatment of sewage,aerobic microbes consume the organic matter present in the effluent. As these microorganisms break down and consume the organic pollutants,the amount of organic matter in the water decreases. Consequently,the $BOD$ level of the effluent decreases,indicating that the water has become less polluted.

When does the $BOD$ level in effluent decrease?

Similar Questions

The key substance between primary and secondary treatment in Sewage Treatment Plants $(STP)$ is?

$A$: Microbes are used in $STPs$.
$R$: $STPs$ are used to prevent water pollution.

Which microorganisms are responsible for the formation of flocs in sewage treatment?

Biological process is carried out in which type of water treatment?

Assertion $(S)$: Flocs are organisms that consume inorganic substances in water.
Reason $(R)$: $STPs$ are used to prevent water pollution.

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