教師資料查詢 | 類別: 期刊論文 | 教師: 黃國楨 Hwang, Kuo-Jen (瀏覽個人網頁)

標題:Filtration characteristics and membrane fouling in cross-flow microfiltration of BSA/dextran binary suspension
學年98
學期2
出版(發表)日期2010/02/01
作品名稱Filtration characteristics and membrane fouling in cross-flow microfiltration of BSA/dextran binary suspension
作品名稱(其他語言)
著者Hwang, Kuo-Jen; Sz, Pan-Yu
單位淡江大學化學工程與材料工程學系
出版者Amsterdam: Elsevier BV
著錄名稱、卷期、頁數Journal of Membrane Science 347(1-2), pp.75-82
摘要Filtration characteristics and membrane fouling in BSA/dextran binary suspension cross-flow microfiltration is studied. An increase in cross-flow velocity or transmembrane pressure leads to higher pseudo-steady filtration flux due to less membrane fouling or higher driving force. The fouled membrane pore size and fouled layer thickness under various conditions are estimated using a theoretical model based on the Hagen–Poiseuille law. The fouled membrane pore size decreases with increasing transmembrane pressure due to ever increasing fouling. The fouled layer thickness becomes thicker and invariant with operating conditions under a lower pressure drop through the fouled membrane. Molecular adsorption occurs on the pore walls until a specific wall shear stress is reached in the membrane pores. However, the fouled layer becomes thinner when the pressure drop exceeds a critical value. An increase in cross-flow velocity results in a larger fouled membrane pore size and a thicker fouled layer in such condition. The dextran molecular deformation under higher transmembrane pressure causes a thinner fouled layer and an ultimate equilibrium adsorption in the membrane pores. Furthermore, an increase in cross-flow velocity leads to higher BSA and dextran rejection due to the sweeping effect on the membrane surface. The BSA rejection increases with transmembrane pressure due to the reduction in membrane pore size, while the decrease in dextran rejection under higher transmembrane pressure is attributed to the molecular deformation. The “coil-stretched” deformation of dextran molecules can be indicated using the Deborah number. The fouled membrane pore size and dextran rejection decrease with increasing Deborah number and remain constant as the Deborah number exceeds a critical value. Taking the filtration flux and solute rejection into consideration, operating a cross-flow microfiltration system under lower cross-flow velocity and higher transmembrane pressure is more efficient from the selectivity and mean dextran mass flux view points.
關鍵字Cross-flow microfiltration; Rejection coefficient; Membrane fouling; Membrane filtration; Bio-separation
語言英文
ISSN0376-7388
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Hwang, Kuo-Jen
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
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