Determination of Quantity of Sanitary Sewage
The quantity of sanitary sewage or (D.W.F) is determined by considering the following factors:
3 Considering Factors
1. The total quantity of sewage is taken equal to the quantity of water supply.
2. An additional quantity of water is considered for infiltration, commercial and industrial water supply etc.
3. A subtraction is made for ex-filtration, water consumption in drinking, cooking etc.
Thus, the quantity of sanitary sewage = (Total quantity of water )+ (Addition due to infiltration, industrial supply etc.) – (Subtraction due to ex-filtration etc.)