In: Biology
Briefly discuss how one estimates the amount of wastewater in any given situation and its importance.
The sewage consists of wastewater generated from the residential places, commercial centers, institutions and industrial wastewaters discharge into sewer network from the industries located within the city limits.
Accurate estimation of sewage is neccesary so as to build hyddraulic design of sewers. Far lower or far higher estimation of sewer size may not be adequate for future sewer usage. Correct estimation of sewage discharge is necessary; otherwise sewers may prove inadequate resulting in overflow or may prove too large in diameter, which may make the system uneconomical and hydraulically inefficient. Hence, before designing the sewerage system it is important to know the discharge / quantity of the sewage.
Net quantity of sewage: The net quantity of sewage production can be estimated by considering the addition and subtraction as discussed above over the accounted quantity of water supplied by water authority as below:
Net quantity of sewage = Accounted quantity of water supplied from the water works + Addition due to unaccounted private water supplies + Addition due to infiltration in sewer through faulty joints and cracks in pipes - Subtraction due to water losses through leakage in water distribution system or house connections - Subtraction due to water not entering the sewerage system.