TERTIARY TREATMENT OF SUGAR MILL WASTEWATER THROUGH PHYSICOCHEMICAL METHOD

Abstract

Increasing concern for the protection of the environment, particularly in view of growing demands for drinking water supplies from surface water bodies, has resulted in focusing attention on advanced methods and processes for the treatment of sewage and industrial effluents. Tertiary treatment or advanced treatment involves a combination of processes which exceed treatment levels achieved. by conventional methods of biological treatment. The most common combination at present is the biological process linked to some aspect of chemical treatment. The basis of physico-chemical treatment is flocculation of wastewater by the addition of chemicals to remove suspended matter. In the present study, effluent from secondary clarifier of sugarmill was taken and treated with one coagulant, viz. Alum and two coagulant aid viz. CMC and polyacrylamide. It was observed that the removal efficiencies of 94.94 percent of SS, 100 percent of COD and 100 percent BOD achieved when polyacrylamide used as coagulant aid and alum as coagulant.