회전원판형 질화조를 이용한 M-dephanox 공정

This study was focused on improving nitrification efficiencies of M-Daphanox (Modified-Dephanox) process. Rotating biological contactor(RBC) was used instead of floating sponge type media in nitrification reactor. High ammonia removal efficiencies were observed in nitrification reactor, regardless of organic loading from contactor of M-Daphanox process. Denitrification efficiencies were also increased to maintain low NO3 -N concentration in effluent. This enhanced phosphate release in anaerobic contactor and resulted in high removal efficiencies of phophorus. Average removal efficiencies of TCODCr and SCODCr were 93.8% and 81.6%, respectively, while those of TKN and NH4+-N were 80.9% and 74.4%, respectively. As for phosphorous treatment, the average removal efficiencies of TP and OP were 94.7% and 94.3%, respectively. Also, effect of operating temperature on nitrogen removal was examined. Average removal efficiency of TN was 65.8 % at 15℃ or below (at average temperature of 13.3 ℃), while that was 82.8 % at 15℃ or above (at average temperature of 21.9 ℃).