In an oxidation pond, the sewage is made non-putrescible primarily by – McqOptions

MCQOPTIONS

1.	In an oxidation pond, the sewage is made non-putrescible primarily by
A.	Algae bacteria symbiosis only
B.	Bacterial oxidation only
C.	Chemical oxidation only
D.	Algae photosynthesis and algae bacteria symbiosis
Answer» E.

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