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http://dx.doi.org/10.17640/KSWST.2018.26.6.61

Evaluation of High Flux Combined with Pretreatment Process for Application of Decentralized Water Supply System with Ceramic Membrane  

Kang, Joon-Seok (Department of Environmental Engineering and Energy, Myongji University)
Park, Seo Gyeong (Department of Environmental Engineering and Energy, Myongji University)
Lee, Jeong Eun (Department of Environmental Engineering and Energy, Myongji University)
Kang, So Yeon (Department of Environmental Engineering and Energy, Myongji University)
Lee, Jeong Jun (Department of Environmental Engineering and Energy, Myongji University)
Quyen, Vo Thi Kim (Department of Environmental Engineering and Energy, Myongji University)
Kim, Seongsu (Water supply research center, K-water Institute)
Kim, Han-Seung (Department of Environmental Engineering and Energy, Myongji University)
Publication Information
Journal of Korean Society of Water Science and Technology / v.26, no.6, 2018 , pp. 61-72 More about this Journal
Abstract
In this study, applicability of the decentralized water supply system were investigated by the high flux evaluation using ceramic membrane with combined pretreatment process. A) filtration process increased the transmembrane pressure of 1.4 kPa and 89.5 kPa on 2 and $5m^3/m^2{\cdot}d$ of filtration flux, respectively, the physical backwashing recovery rate were less than 28.6%. The (B) Coag./Floc. - Sedi. combined process with 4 mg / L of A-PAC showed that the transmembrane pressure increased to within 6 kPa, the physical backwashing recovery rate was over 37.9 % higher than (A) Filtration process. (C) Coag./Floc. combined process showed an increase of transmembrane pressure compared with (B) Coag./Floc. - Sedi. combined process, physical backwashing recovery rate was over 84%. As a result of the membrane fouling analysis using the resistance in series model, the combined pretreatment process showed that the cake resistance (Rc) was more than 92% at membrane filtration flux of $2m^3/m^2{\cdot}d$. In the (C) Coag./Floc. combined process, cake resistance(Rc) was over 86% on high flux conditions. The coagulation floc contained in influent was removed by the membrane, and the cake layer formed with the removed floc was identified as reversible fouling resistance which could be recovered by physical backwashing. The decentralized water supply system, which has the limitation of site area and installation space, is considered to could be operation of high flux of ceramic membrane by applying (C) Coag./Floc. combined process without sedimentation process.
Keywords
Ceramic membrane; Coagulation; Combined process; Decentralized water supply system; Pretreatment;
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