Waste Water Engineering
In a grit chamber of a sewage treatment plant,

All of these
Flow velocity 0.15 m to 0.3 m/sec is kept
Depth of 0.9 m to 1.20 m is kept
One minute of detention period is kept

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Waste Water Engineering
Nitrogen cycle of sewage, is

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

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Waste Water Engineering
Stone ware pipes are

Especially suited to pressure pipes
Hydraulically efficient because of their smooth interior surface
Highly impervious
Highly resistant to sulphide corrosion

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