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DOI : 10.17640/KSWST.2019.27.5.31 , Vol.27, No.5, 31 ~ 40, 2019
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| Title |
| A Study on Membrane Fouling Analysis for Application of High Flux Ceramic Membrane Process in Decentralized Water Supply System |
| 강준석 Joon-seok Kang , 이정은 Jeong-eun Lee , 강소연 So Yeon Kang , 안선아 Sun-a An , 쿠엔보 Vo Thi Kim Quyen , 김성수 Seongsu Kim , 김한승 Han-seung Kim |
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| Abstract |
| 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. |
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| Key Words |
| Ceramic membrane, Decentralized water supply system, Resistance in series model, Membrane fouling |
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