Improving the efficiency of biological treatment of industrial wastewater as part of urban wastewater

Abstract

The article presents the results of studies of treatment of industrial wastewater as a part of urban wastewater. A biosorption method using powdered activated carbon was used as a method to increase the efficiency of biological purification. The research was carried out on a pilot plant consisting of four tanks simulating the operation of an aerotank. In each series of experiments, wastewater, activated sludge and special solutions simulating industrial effluents of different origin were added in equal proportions to the tank. Based on the presented results, an assessment of the effectiveness of biological wastewater treatment in the presence of powdered activated carbon with a different content of industrial effluents in the composition of urban wastewater was carried out. At the concentration of coal in the tank 0.1 g/dm3 efficiency of wastewater treatment of simulated effluent from the food industry on the generalized indicator “chemical oxygen demand’’ was 67.9%, and the efficiency of treatment of wastewater containing petroleum products reached 95.5%.