Q
The working conditions in imhoff tanks are_______________?
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A
A. Aerobic only
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B
B. Anaerobic only
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C
C. Aerobic in lower compartment and anaerobic in upper compartment
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D
D. Anaerobic in lower compartment and aerobic in upper compartment
Correct Answer:
D. D. Anaerobic in lower compartment and aerobic in upper compartment