Treatment of Dairy Wastewater Using Pilot Scale Tricking Filter

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 ۲۵۲ to ۱۲۰۰ mg/l is reduced ۵۰-۷۳% by a single stage and a further ۱۷-۵۵% by sedimentation tank. Treatment efficiencies are determined at various waste strengths and influent flow rates. With a loading rate of ۵-۱۲ kg BOD/m۳ per day the average BOD reduction is between ۵۰-۶۰%. The average effluent suspended solid is ۱۵ mg/I and lactose is removed completely hut total nitrogen is reduced approximately ۳۰% for the entire study.