Waste Water Engineering
In the activated sludge process

Aeration is continued till stability
Sludge is activated by constant stirring
Aeration is done with an admixture of previously aerated sludge
Water is removed by centrifugal action

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
Nitrogen cycle of sewage, is

Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia
Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates
Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen
Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates

ANSWER DOWNLOAD EXAMIANS APP