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Membranes 2014, 4(3), 319-332; doi:10.3390/membranes4030319

Filtration Behaviour and Fouling Mechanisms of Polysaccharides

School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada
Author to whom correspondence should be addressed.
Received: 2 May 2014 / Revised: 24 June 2014 / Accepted: 30 June 2014 / Published: 8 July 2014
(This article belongs to the Special Issue Membrane Bioprocesses and Bioreactors)
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This study investigated filtration behaviors of polysaccharides solutions, both alone and in mixture with proteins, in the short-time constant flux filtration with the focus on factors affecting the transmembrane pressure (TMP) increase rate, the irreversible filtration resistance, and the membrane rejection behavior. The results showed that the TMP increase rates in the short-time constant flux filtration of alginate solutions were significantly affected by the calcium addition, alginate concentration, and flux. Although the addition of calcium resulted in a decrease in the TMP increase rate, it was found that the irreversible fouling developed during the filtration increased with the calcium addition, implying that the double-sided effect of calcium on membrane filtration and that the TMP increase rate observed in the filtration does not always reflect the irreversible membrane fouling development. It was also found that for the filtration of solutions containing mixed alginate and BSA, alginate exerted a dominant effect on the TMP increase rate and the membrane exhibited a reduced rejection to both alginate and BSA molecules compared to that in the filtration of the pure alginate or BSA.
Keywords: membrane fouling; soluble microbial product (SMP); MBR; concentration polarization; polysaccharides; alginate membrane fouling; soluble microbial product (SMP); MBR; concentration polarization; polysaccharides; alginate
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Jamal, S.; Chang, S.; Zhou, H. Filtration Behaviour and Fouling Mechanisms of Polysaccharides. Membranes 2014, 4, 319-332.

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