Waste Water Engineering
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

0.05554 cumec
0.05552 cumec
0.05556 cumec
0.0556 cumec

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Waste Water Engineering
Skimming tanks are

Used to remove the grease and oil
Those from which sludge is skimmed out
Tanks provided with self- cleansing screens
Improved version of grit chambers

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