Sewage Treatment Plants And Water Recycling

Domestic waste water management system of any city consists of collection. Treatment and disposal. In conventional centralized sewage treatment system, about 80% of the cost is accounted for the collection. The cost of collection of sewage and its conveyance to the terminal point in the large cities is very high. Further, the depth of sewer goes on increasing with the increase of length of sewer line and pumping of the sewage at the intermediate and terminal points requires a lot of energy. In centralized treatment system volume of the sewage becomes very large and the distance of conveyance, as the sewage treatment plants are generally located outside of the cities, is very long. Further CTS aggravates the environmental problem also, because of large volume of the waste water of the entire city is discharged at one place. In decentralized treatment system, a balance between the advantages of large scale treatment in terms of economics of scale and individual responsibility for domestic waste water treatment system can be obtained by providing colony wise / sector-wise treatment system.