During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?
Correct answer: A. Both B. and C.
- A. Both B. and C.
- B. Digestion
- C. Sedimentation
- D. Filtration
Explanation
An Imhoff tank has an upper chamber for sedimentation and a lower chamber where the settled sludge undergoes anaerobic digestion. Hence both sedimentation and digestion occur.
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