無機管式薄膜過濾蛋白質溶液之探討

林凱尉

doi:10.6846/TKU.2007.00850

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無機管式薄膜過濾蛋白質溶液之探討

Investigation on the Filtration of Protein Solution by Inorganic Tubular Membrane

林凱尉 , Masters　　Advisor：鄭東文　　

繁體中文 DOI： 10.6846/TKU.2007.00850

薄膜結垢；等電點；阻隔率；通氣； Membrane fouling ； Isoelectric point ； Rejection ； Gas-sparging

Abstract │ Reference (73) │ Times Cited (4) │ Altmetrics

Abstract 〈TOP〉

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In this study, the inorganic membranes were employed in a cross-flow filitration system to discuss the flux and fouling behavior of protein solutions under various solution properties and operating parameters, and to search the manner for increasing the flux. Mixture of BSA and β-cyclodextrin was selected as the testing solution and the operating parameters such as transmembrane pressure, solution concentration, pH value, liquid velocity and air velocity were considered to determine the membrane resistance and establish the model for flux analysis.
Experimental result indicates that the flux of BSA solution at its isoelectric point is lower than that at other pH values; this is due to a denser polarization layer formed at its isoelectric point. Because of the internal fouling ofβ-cyclodextrin, the flux of solution containing β-cyclodextrin is lower than that of pure BSA solution. In binary solutions, the β-cyclodextrin rejection by membrane varies with the change of pH value; the rejection of β-cyclodextrin at the isoelectric point of BSA is higher than that at the condition far away from the BSA isoelectric point. Under low liquid velocity, flux can be enchanced efficiently by gas-sparging due to gas slugs increase the turbulence at the membrane surface.
According to the resistance-in-series model, internal fouling by β-cyclodextrin is higher than the external fouling by BSA. When in binary solution, fouling layer formed by BSA on membrane surface could reject β-cyclodextrin transmembrane, and reduce internal fouling resistance. Estimation by the osmotic pressure model, the trend of theoretical flux agrees well with experiment flux. At low liquid velocity, the experiment flux is higher than theoretical flux, perhaps due to the underestimation of turbutance on the membrane surface.

Reference ( 73 ) 〈TOP〉

Bansal, B., R. Al-Ali, R. Mwrcade-Prieto, X.D. Chen, “Rinsing and clean -ing of α-lactalbumin fouled MF membranes”, Sep. Purif. Technol. 48 (2006) 202-207.
連結：
Bargeman, G., J.M. Vollenbroek, J. Straatsma, C.G.P.H. Schroen, R.M. Boom, “Nanofiltration of multi-component feeds. Interactions between neutral and charged components and their effect on retention”, J. Membr. Sci. 247 (2005) 11-20.
連結：
Bauser, H., H. Chmiel, N. Stroh, E. Walitza, “Control of concentration polarization and fouling of membranes in medica, food and biotechnical application”, J. Membr. Sci. 27 (1986) 195-202.
連結：
Belfort, G., ”Membrane modules: comparison of different configurations using fluid mechanics”, J. Membr. Sci., 35, (1988) 245-270.
連結：
Belfort, G., ”Fluid mechanics in membrane filtration: recent deve -lopments”, J. Membr. Sci. 40 (1989) 123-147
連結：

Times Cited (4) 〈TOP〉

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