Abstract
Combined wastewater from soya milk and tofu manufacturing industry was treated by physico-chemical method using conventional coagulants such as lime, alum, ferric chloride, and ferrous sulphate in combination with synthetic cationic polyelectrolyte. The wastewater samples were analyzed as per the Standard Methods and the experiments were carried out using Jar test apparatus (Phipps & Birds). The ferric chloride in combination with synthetic cationic polymer (Oxyfloc-FL-11) in the ratio of 250:20 mg L−1 resulted in very good removals of COD, BOD, and SS of 75.4, 79.8, and 96.0% respectively with complete removal of odor, color and turbidity.
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