Waste Water Engineering
The settlement of a particle in sedimentation tank, is affected by

Size and shape of solid
All listed here
Viscosity of water
Velocity of flow

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Waste Water Engineering
Nitrogen cycle of sewage, is

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

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Waste Water Engineering
Stone ware pipes are

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

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