Civil Engineering - Waste Water Engineering - Discussion

20. 

For treating the sewage of a large city, you will recommend

[A]. a sedimentation tank and an activated sludge treatment plant
[B]. a plant consisting of Imhoff tanks with low rate trickling filters
[C]. sedimentation tanks with high rate trickling filters
[D]. none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Sravan G Kumar said: (Nov 14, 2016)  
In sedimentation tank, 30 to 35% of settleable organic matter can be removed.

Activated sludge process can remove 50 to 60% of soluble organic matter.

That is why mostly we recommended for these two treatment units.

Chhaya said: (Mar 5, 2017)  
Thanks @Sravan.

Vasanthadevi said: (Jul 19, 2017)  
And in city human waste and industrial waste both treatment plan required.

Anirban Roy said: (Nov 14, 2020)  
In activated sludge process, the detention period is only for 2 hours. So quick treatment.

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