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Effect of Cross-flow Velocity and TMP on Membrane Fouling in Thermophilic Anaerobic Membrane Bioreactor Treating Food Waste Leachate  

Kim, Young-O (R&D Center, Hyundai Engineering and Construction Co.)
Jun, Duk-Woo (R&D Center, Hyundai Engineering and Construction Co.)
Yoon, Seong-Kyu (Department of Civil and Environmental Engineering, Hanyang University)
Chang, Chung-Hee (R&D Center, Hyundai Engineering and Construction Co.)
Bae, Jae-Ho (Department of Environmental Engineering, Inha University)
Yoo, Kwan-Sun (Department of Environmental Engineering, Inha University)
Kim, Jeong-Hwan (Department of Environmental Engineering, Inha University)
Publication Information
Membrane Journal / v.21, no.4, 2011 , pp. 360-366 More about this Journal
Abstract
The effect of cross-flow velocity and transmembrane pressure (TMP) on membrane fouling was observed from pilot-scale operation of thermophilic anaerobic membrane bioreactor (AnMBR) treating food waste leachate. It was found that fouling rate was reduced significantly as cross-flow velocity increased at constant TMP mode of operation while this effectiveness was more pronounced at lower TMP. Higher TMP resulted in less permeable fouling layer possibly due to compressibility of foulant material on membrane surface. Particle sizes of membrane concentrate ranged from 10 to $100{\mu}m$, implying that shear-induced diffusion enhance back transport of these particle sizes away from the membrane effectively. From the continuous operation of AnMBR, it was confirmed that shear rate played an important role in the reduction of membrane fouling. Membrane autopsy works at the end of operation of AnMBR showed clearly that both organic and inorganic fouling were significant on membrane surface. Surface shear by cross-flow velocity was expected to be less effective to remove irreversible fouling which can be mainly caused by the adsorption of organic colloidal materials into membrane pores.
Keywords
cross-flow velocity; TMP; membrane; anaerobic bioreactor; food waste leachate;
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Times Cited By KSCI : 1  (Citation Analysis)
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