The object of the sewage treatment plant is to stabilize decomposable organic matter present in the sewage so as to produce an effluent and sludge, which can be disposed of in the environment without causing health hazards as nuisance. Before proceeding with the design of the treatment plant it is essential to know the variations in quantity and characteristics.

Characterization of waster water is essential for an effective and economical wastewater management program. It helps in the choice of treatment methods, deciding to extend of treatment, assessing the beneficial user of wastewater and utilizing the waste water purification capacity of natural bodies of water in a planned and controlled manner.



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