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    Impact of organic fractions identified by SEC and fluorescence EEM on the hydraulic reversibility of ultrafiltration membrane fouling by secondary effluents

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    Type
    Article
    Authors
    Haberkampa, Jens
    Ernst, Mathias
    Paar, Hendrik
    Pallischeck, Daniela
    Amy, Gary L.
    Jekel, Martin R.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2012-08-03
    Online Publication Date
    2012-08-03
    Print Publication Date
    2011-05
    Permanent link to this record
    http://hdl.handle.net/10754/561767
    
    Metadata
    Show full item record
    Abstract
    Loss of membrane filtration performance due to organic fouling is still a significant drawback for the application of low-pressure membranes in tertiary wastewater treatment. The present study investigates the relevance of different organic fractions present in secondary effluents in terms of hydraulically reversible and irreversible fouling of hollow-fibre ultrafiltration membranes. A good correlation between the hydraulically reversible filtration resistance and the total organic biopolymer concentration according to size exclusion chromatography (SEC) was observed. Qualitatively biopolymers consist mainly of polysaccharides as well as proteins with high molecular weight. Polysaccharides are retained by the membrane pores, but can be removed by simple UF backwashing. On the other hand, fluorescence excitation-emission matrix (EEM) analysis indicates that the extent of the hydraulically irreversible fouling correlates with the presence of protein-like substances. Removal of protein-like substances by biological slow sand filtration or chemical coagulation results in the significant reduction of the hydraulically irreversible fouling, which is presumably due to proteins in the molecular range of biopolymers. In contrast to the comparatively low sensitivity of colorimetric methods for the analysis of proteins and polysaccharides, the combined application of size exclusion chromatography and fluorescence EEM analysis is a promising tool for the determination of the organic fouling propensity of secondary effluents. ©2011 Desalination Publications. All rights reserved.
    Citation
    Haberkamp, J., Ernst, M., Paar, H., Pallischeck, D., Amy, G., & Jekel, M. (2011). Impact of organic fractions identified by SEC and fluorescence EEM on the hydraulic reversibility of ultrafiltration membrane fouling by secondary effluents. Desalination and Water Treatment, 29(1-3), 73–86. doi:10.5004/dwt.2011.1975
    Publisher
    Informa UK Limited
    Journal
    Desalination and Water Treatment
    DOI
    10.5004/dwt.2011.1975
    ae974a485f413a2113503eed53cd6c53
    10.5004/dwt.2011.1975
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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