In the first stage of sewage treatment,physic | vedclass

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(D) The first stage of sewage treatment is known as Primary Treatment.This stage involves the physical removal of large and small particles from the s

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Both $(A)$ and $(B)$

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(D) The first stage of sewage treatment is known as Primary Treatment.This stage involves the physical removal of large and small particles from the sewage through two main processes:$1$. Sequential filtration: This removes floating debris.$2$. Sedimentation: This allows grit (soil and small pebbles) to settle down.Therefore,both filtration and sedimentation are part of the primary treatment process.

In the first stage of sewage treatment,physical particle matter is removed by which process?

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$(iv)$ Biological treatment

The $BOD$ of effluent water is:

Select the correct statement from the following.

$A$ sewage treatment process,in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process,is called

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