Waste Water Engineering
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

Branch sewer
Lateral sewer
Sewer outfall
House sewer

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Waste Water Engineering
Nitrogen cycle of sewage, is

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

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Waste Water Engineering
The sewers

Must be laid at least 2 to 3 m deep to collect /water from the basements
Must flow under gravity ½ to ¾ full
All listed here
Must be of adequate size to avoid over flow

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