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    Characterization of soluble microbial products and their fouling impacts in membrane bioreactors

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    Type
    Article
    Authors
    Jiang, Tao
    Kennedy, Maria Dolores
    Schepper, Veerle D.
    Nam, Seongnam
    Nopens, Ingmar
    Vanrolleghem, Peter A.
    Amy, Gary L.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2010-09
    Permanent link to this record
    http://hdl.handle.net/10754/561517
    
    Metadata
    Show full item record
    Abstract
    Membrane bioreactor (MBR) fouling is not only influenced by the soluble microbial products (SMP) concentration but by their characteristics. Experiments of separate producing biomass associated products (BAP) and utilization associated products (UAP) allowed the separation of BAP and UAP effects from sludge water (SW). Thus, filtration of individual SMP components and further characterization becomes possible. Unstirred cell filtration was used to study fouling mechanisms and liquid chromatography-organic carbon detection (LC-OCD) and fluorescence excitation-emission matrix (EEM) were used to characterize the foulant. Generally, the SMP exhibiting characteristics of higher molecular weight, greater hydrophilicity and a more reduced state showed a higher retention percentage. However, the higher retention does not always yield higher fouling effects. The UAP filtration showed the highest specific cake resistance and pore blocking resistance attributed to their higher percentage of low molecular weight molecules, although their retention percentage was lower than the SW and BAP filtration. The UAP produced in the cell proliferation phase appeared to have the highest fouling potential. © 2010 American Chemical Society.
    Citation
    Jiang, T., Kennedy, M. D., Schepper, V. D., Nam, S.-N., Nopens, I., Vanrolleghem, P. A., & Amy, G. (2010). Characterization of Soluble Microbial Products and Their Fouling Impacts in Membrane Bioreactors. Environmental Science & Technology, 44(17), 6642–6648. doi:10.1021/es100442g
    Publisher
    American Chemical Society (ACS)
    Journal
    Environmental Science & Technology
    DOI
    10.1021/es100442g
    PubMed ID
    20704277
    ae974a485f413a2113503eed53cd6c53
    10.1021/es100442g
    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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