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civil engineering waste water engineering
1. Nitrogen cycle of sewage, is
(A): Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates
(B): Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen
(C): Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia
(D): Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates
(E): None of these.
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