Which of the following sewage treatment methods has inherent problem of odour, pending, and fly nuisance?

Which of the following sewage treatment methods has inherent problem o

1.	Which of the following sewage treatment methods has inherent problem of odour, pending, and fly nuisance?
A.	UASB system
B.	Activated sludge process
C.	Trickling filters
D.	Stabilization ponds
Answer» D. Stabilization ponds

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Which of the following sewage treatment methods has inherent problem of odour, pending, and fly nuisance?

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