막결합형 연속회분식 반응기는 작은 규모의 폐수처리에서 새로이 부각되고 있는 기술이다. 본 연구에서는 $0.4{mu}m$의 세공크기를 갖고 있는 PVC 재질의 평막이 침지된 막결합형 연속회분식 반응기에서 3가지 운전방식이 여과성능과 제거효율에 미치는 영향을 133일 동안 살펴보았다. 3가지 운전방식에서 조업 후 84일 후에 MLSS 농도는 $10,520{sim}13,430 mg/L$.로 유지되었다. 제거효율은 3가지 운전방식 간에 큰 차이가 없었다. 그러나 여과성능에 있어서 비폭기/폭기 시간이 60/120 min인 싸이클이 120/240 min인 싸이클보다 효과적이었으며, 간헐적 여과 방식이 연속 여과 방식보다 효과적이었다. 비폭기/폭기 시간이 60/120 min인 싸이클의 경우, 127일 동안 막세정 없이 연속적으로 운전할 수 있었으며, COD, SS, 총질소 및 총인의 제거율은 각각 99.4%, 100%, 85.1% 및 95.1%이었다.
The membrane-coupled sequencing batch reactor is a promising technology for wastewater treatment of small scale. The effect of operation modes on filtration performance and removal efficiency was investigated in a sequencing batch reactor, in which a flat-sheet microfiltration membrane made of PVC with a pore size of $0.4{mu}m$ was submerged. Three sets of operation modes during 133 days were conducted to identify their effect on the filtration performance and removal efficiency. MLSS concentrations in the reactors were in the range of $10,520{sim}13,430 mg/L$ after nearly 84 days of run. There was no wide difference in the removal efficiency between three sets of operation modes. But in the filtration performance, time cycle of non-aeration and aeration of 60/120 min was more effective than 120/ 240 min, and intermittent filtration was more effective than continuous filtration. When time cycle of non-aeration and aeration was set at 60/120 min, membrane filtration was able to be continued for 127 days without membrane cleaning, and was stable after the cleaning, and average removal efficiencies of COD, SS, total nitrogen, and total phosphorous were 99.4%, 100%, 85.1%, and 95.1%, respectively.
