Treatment of Dairy Waste Water with Inorganic and Organic Coagulants

The dairy industry involves processing raw milk into products including milk, butter, cheese, yogurt, using processes such as chilling, pasteurization, and homogenization. These industries wastewater is characterized by high COD, BOD, nutrients etc. Such wastewater is to be treated using Inorganic and organic coagulants methods and then tests are to be carried to check the water characteristics like BOD, COD, pH and turbidity, etc. The initial pH, Turbidity, COD are 6.5, 1740 NTU, 3900 mg/l respectively. Inorganic coagulants such as Poly Aluminium chloride (PAC), FeSO4 and Potash Alum. Organic Coagulants such as guar gum, Sodium alginate and sodium salt of carboxyl methyl cellulose (Na-CMC). The efficiency of reduction of turbidity by Poly Aluminium chloride (PAC), FeSO4 and Potash Alum are 61.60%, 61.74% and 65.20% respectively. The efficiency of reduction of COD from Poly Aluminium chloride (PAC), FeSO4 and Potash Alum are 69.2%, 66.5%, 63.8% respectively. For variation of doses of these coagulants the reduction of solids takes place.