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    Effect of membrane character and solution chemistry on microfiltration performance

    Access Status
    Fulltext not available
    Authors
    Gray, S.
    Ritchie, C.
    Tran, Truyen
    Bolto, B.
    Greenwood, Paul
    Busetti, Francesco
    Allpike, Bradley
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Gray, S. and Ritchie, C. and Tran, Truyen and Bolto, B. and Greenwood, Paul and Busetti, Francesco and Allpike, Brad. 2008. Effect of membrane character and solution chemistry on microfiltration performance. Water Research. 42 (3): pp. 743-753.
    Source Title
    Water Research
    DOI
    10.1016/j.watres.2007.08.005
    ISSN
    00431354
    Faculty
    Department of Applied Chemistry
    School of Science
    Science and Engineering
    Remarks

    The link to the journal's home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/309/description#description

    Copyright © 2008 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/42589
    Collection
    • Curtin Research Publications
    Abstract

    To help understand and predict the role of natural organic matter (NOM) in the fouling oflow-pressure membranes, experiments were carried out with an apparatus that incorporates automatic backwashing and long filtration runs. Three hollow fibre membranes of varying character were included in the study, and the filtration of two different surface waters was compared. The hydrophilic membrane had greater flux recovery after backwashing than the hydrophobic membranes, but the efficiency of backwashing decreased at extended filtration times. NOM concentration of these waters (7.9 and 9.1 mg/L) had little effect on the flux of the membranes at extended filtration times, as backwashing of the membrane restored the flux to similar values regardless of the NOM concentration. The solution pH also had little effect at extended filtration times. The backwashing efficiency of the hydrophilic membrane was dramatically different for the two waters, and the presence of colloid NOM alone could not explain these differences. It isproposed that colloidal NOM forms a filter cake on the surface of the membranes and that small molecular weight organics that have an adsorption peak at 220 nm but not 254 nm were responsible for "gluing" the colloids to the membrane surface. Alum coagulation improved membrane performance in all instances, and this was suggested to be because coagulation reduced the concentration of "glue" that holds the organic colloids to the membrane surface.

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