Gum arabic fractionation using synthetic membranes: the importance of fouling

Harriet E. Manning, Michael R. Bird

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The fractionation of 2 wt% gum arabic using 0.1, 0.5 and 0.8 μm polysulfone (PS) flat sheet membranes is investigated. Fluxes of between 35 and 80 L m−2 h−1 were achieved during diafiltration experiments at cross-flow velocities of between 1.0 and 1.6 m s−1. Although all three membranes rejected a large proportion of the total solids, a high degree of fractionation was seen, particularly for the 0.1 μm membrane, which establishes the principle of this novel membrane application. Rejection of high MW arabinogalactan-protein complex (AGP) was observed with selective transmission of lower MW glycoprotein (GP). Multi-cycle experiments showed that flux can be well recovered after cleaning of the membrane, although with the 0.8 μm membrane, greater fractionation was seen after some fouling had occurred.
Original languageEnglish
Pages (from-to)298-303
Number of pages6
JournalFood and Bioproducts Processing
Early online date22 Oct 2014
Publication statusPublished - Jan 2015


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