무산소조에서 온도 및 초기 C/N 비에 따른 축산폐수의 탈질특성

Abstract

The biological denitrification batch tests were conducted to optimize the operating conditions with various temperature and initial SCODCr/NO3-N ratio. and the denitrification rates were analyzed various SCODCr/NO3-N ratio of influent with swine wastes fermented and temperature. The finishing time of denitrification was within 15hours, 12hours, and 6 hours as the temperature of denitrification applied were 151oC, 251oC, and 311oC, respectively. From the batch tests, denitrification rate was operated with over 3 of SCODCr/NO3-N ratio. Denitrification rate was increased as the temperature of denitrification, increased such as 2.40~3.90mg NO3-N/gMLVSShr, 6.10~7.60mgNO3-N/gMLVSShr, and 14.40~15.88mgNO3-N/gMLVSShr, respectively. The denitrification rate was increased as the ratio of initial SCODCr/NO3-N increased. However, it was found that the suitable ratio of SCODCr/NO3-N for denitrification should be considered because the ratio of mg SCODCr consumed per mg NO3-N removed varied depend on the influent SCODCr/TKN ratios.