Aerobic biological oxidation ponds used for the purification of pollut – McqOptions

MCQOPTIONS

1.	Aerobic biological oxidation ponds used for the purification of polluted water
A.	destroys/removes pathogen from the sewage.
B.	is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents.
C.	destroys/removes pathogen much more effectively if the sewage is chlorinated.
D.	all (a), (b) & (c).
Answer» E.

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