Q
For treating the sewage of a large city, you will recommend_________________?
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A
A. A sedimentation tank and an activated sludge treatment plant
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B
B. A plant consisting of imhoff tanks with low rate trickling filters
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C
C. Sedimentation tanks with high rate trickling filters
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D
D. None of these
Correct Answer:
A. A. A sedimentation tank and an activated sludge treatment plant