Improving the efficiency of wastewater treatment facilities with chemical phosphorus removal from reject water

Summary

The problems associated with the eutrophication of water bodies receiving effluents containing phosphorus in residual concentrations are described. The reasons for the most intensive phosphorus release into the intrasite sewage system during sludge processing are given. It has been established that the discharge of this wastewater into the head structures of wastewater treatment facilities leads to an increase in the nutrients loading (nitrogen and phosphorus), suspended solids, COD. The results of experimental studies on the selection of the optimal type and dosage of the chemical for the removal of phosphates from reject water generated during municipal wastewater sludge treatment are given. The purpose of the research is to find ways to remove phosphorus to eliminate the increase in phosphorus concentration in the receiving chamber observed as a result of reject water discharge from the sludge treatment facilities, and to ensure the wastewater treatment of the intrasite sewage system of the treatment facilities with minimal construction and operating costs as well as to produce reusable sludge. A process flow scheme of the nutrients removal from the wastewater of intrasite sewage system of the treatment facilities of Novosibirsk is proposed. The process provides for the sludge that after stabilization and decontamination can be used as organic fertilizer for industrial crops.

Key words

filtrate , wastewater , reagent , phosphorous , filtrate , sewerage treatment facilities , biogenic elements , sludge water , intrasite sewage system