분산형 용수공급 시스템에서 고유속 세라믹 분리막 공정의 적용을 위한 막오염 해석 연구 (A Study on Membrane Fouling Analysis for Application of High Flux ​​Ceramic Membrane Process in Decentralized Water Supply System)

서지정보

· 발행기관 : 한국수처리학회
· 수록지 정보 : 한국수처리학회지 / 27권 / 5호 / 31 ~ 39페이지
· 저자명 : 강준석, 이정은, 강소연, 안선아, 쿠엔 보(Vo Thi Kim Quyen), 김성수, 김한승

초록

In this study, applicability of the decentralized water supply system were investigated by the high flux evaluation using ceramic membrane. In the constant pressure filtration process, the resistance in series model was applied to confirm the membrane fouling mechanism according to the water qualities and operating pressure conditions. It was evaluated by adjusting the operating pressure to 100, 200, and 300 kPa under the respective water conditions in which turbidity (10, 25 NTU) and DOC (2.5, 8 mg/L) concentrations were adjusted. As a result, the flux was more decreased as the operating pressure, turbidity and DOC concentrations increased. In addition, the recovery rate of physical backwash was 12.1 ~ 67.9%, depending on the water qualities and operating pressure conditions. In high turbidity((B) condition), the physical recovery was verified to be less than about 23%, and the irreversible fouling (Rf) was 35-41%, the highest compared to (A) and (B) conditions. On the other hand, membrane fouling formed at high DOC ((C) water quality) showed reversible fouling (Rc) of more than 87%. For distributed water supply systems with limited site area and installation space, it is considered appropriate to apply ceramic membranes that can be operate at high flux. It is thought that more efficient facility operation will be possible through suitable physical backwashing cycle setting according to water quality and operating pressure conditions.

영어초록

In this study, applicability of the decentralized water supply system were investigated by the high flux evaluation using ceramic membrane. In the constant pressure filtration process, the resistance in series model was applied to confirm the membrane fouling mechanism according to the water qualities and operating pressure conditions. It was evaluated by adjusting the operating pressure to 100, 200, and 300 kPa under the respective water conditions in which turbidity (10, 25 NTU) and DOC (2.5, 8 mg/L) concentrations were adjusted. As a result, the flux was more decreased as the operating pressure, turbidity and DOC concentrations increased. In addition, the recovery rate of physical backwash was 12.1 ~ 67.9%, depending on the water qualities and operating pressure conditions. In high turbidity((B) condition), the physical recovery was verified to be less than about 23%, and the irreversible fouling (Rf) was 35-41%, the highest compared to (A) and (B) conditions. On the other hand, membrane fouling formed at high DOC ((C) water quality) showed reversible fouling (Rc) of more than 87%. For distributed water supply systems with limited site area and installation space, it is considered appropriate to apply ceramic membranes that can be operate at high flux. It is thought that more efficient facility operation will be possible through suitable physical backwashing cycle setting according to water quality and operating pressure conditions.

참고자료

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