Waste Water Engineering
In areas where rainy season is limited to a few months, the type of sewerage system recommended is

Combined system
Separate system
Partially separate system
None of these

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Waste Water Engineering
The stone ware sewers

All listed here
Are used for carrying sewage and drainage from houses
After casting are dried and burnt at temperature 150°C, 700°C and 1200°C
Are manufactured from clays and shale

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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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