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Multiple Choice Questions
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 , & .
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