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UPSC Civil Service Exam Questions

Q1:

Which one of the following statements is true to trickling filter sludge ?

A It has a comparatively low sludge volume index

B It is more difficult to dewater than activated sludge

C It has a comparatively low concentration of sludge solids

D It is bulky

ANS:A - It has a comparatively low sludge volume index

No answer description is available.



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