Treatment of Dairy Wastewater Using Pilot Scale Tricking Filter

Abstract

A pilot scale trickling filter and secondary sedimentation are used to evaluate the feasibility of this process for the treatment of raw dairy waste. The BOD in the raw waste of 252 to 1200 mg/l is reduced 50-73% by a single stage and a further 17-55% by sedimentation tank. Treatment efficiencies are determined at various waste strengths and influent flow rates. With a loading rate of 5-12 kg BOD/m3 per day the average BOD reduction is between 50-60%. The average effluent suspended solid is 15 mg/I and lactose is removed completely hut total nitrogen is reduced approximately 30% for the entire study.