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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2019.29.1.18

Analysis of Membrane Fouling Reduction by Natural Convection Instability Flow in Membrane Filtration of Protein Solution Using Blocking Filtration Model  

Kim, Ye-Ji (Department of Engineering Chemistry, Chungbuk National University)
Youm, Kyung-Ho (Department of Engineering Chemistry, Chungbuk National University)
Publication Information
Membrane Journal / v.29, no.1, 2019 , pp. 18-29 More about this Journal
Abstract
The dead-end ultrafiltration (UF) of BSA protein solution was performed to investigate the defouling effects of natural convection instability flow (NCIF) induced in membrane module. The permeate fluxes were measured according to the inclined angles ($0{\sim}180^{\circ}$) of membrane module with respect to gravity, and analyzed using the blocking filtration model. NCIF are more induced as the inclined angles increased from $0^{\circ}$ to $180^{\circ}$, and the induced NCIF enhances flux. Comparing the fluxes at $0^{\circ}$ inclined angle (no NCIF induction) and $180^{\circ}$ (maximum NCIF induction), the flux enhancements by NCIF induction are increased about 5 times in the short-term UF operation (2 hours) and about 17 times in the long-term operation (20 hours). As applying the blocking filtration model, it is more suitable to analyze the flux results by using the intermediate blocking model in the early times of UF operation within 15 minutes and then thereafter times by using the cake filtration model. NCIF induced at $180^{\circ}$ inclined angle reduces the intermediate blocking fouling at about 67% in the early times operation and thereafter the cake layer fouling at about 99.9%. The main defouling mechanism of NCIF induced in the membrane module is suppress the formation of protein cake layer.
Keywords
membrane fouling; fouling reduction; protein fouling; natural convection instability flow (NCIF); blocking filtration model;
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Times Cited By KSCI : 1  (Citation Analysis)
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