jaue20130023: Study on optimization of operating parameters for Changchun northern sewage treatment plant

Abstract

Based on the problem which is water quality instability and high energy consumption in the running of modified A2/0 system in Changchun northern sewage treatment plant, we established the optimum parameters and optimized the operation conditions to provide technical support for the stable operation of the wastewater treatment plant by analyzing effect of the system in different conditions Test results showed the best dissolved oxygen concentration in the end of the aerobic tank, sludge recycling ratio and inner recycling ratio should be chosen 1.5~2.5mg/L, 80% and 180%. The operation results with optimal operation conditions showed that COD, ammonia nitrogen, SS, TN and TP removal rate were 89.07%, 80.44%, 95.27%, 61.09% and 89.88%. The process system effect is stable and effluent can satisfy the sewage discharged standards.