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신항식,전항배,박흥석 대한상하수도학회 1988 상하수도학회지 Vol.2 No.1
Recently, the need for the removal of phosphorus and nitrogen increased due to several reasons including eutrophication control. Biological process could be a reliable and economical method of N and P removal from wastewater, however its removal mechanism and operating criteria were not well established. Objectives of this research are to find out the optimized operating strategy for simultaneous removal of N/P, and their removal mechanisms in SBR. Biological process of phosphours removal from wastewater depends on the mechanism of phosphorus release during anaerobic period followed by phosphorus uptake in aerobic period. SPR(Specific Phosphours release Rate) was useful in estimating the phosphours removal capacity of microbial mass. In this experiment, the removal efficiency of phosphours was above 95% where SPR was above 0.003hr^-1. Phosphorus removal efficiency was progressively enhanced over 4 months. Also the removal efficiencies of both TOC and nitrogen were 95% with the optimized operating strategy; 2-hour anaerobic fill, 3-hour aerobic, 3-hour anoxic, and settle/draw/idle time of 4 hours in SBR.