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    Fouling control in a gravity-driven membrane (GDM) bioreactor treating primary wastewater by using relaxation and/or air scouring

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    pagination_MEMSCI_118261 (1).pdf
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Fortunato, Luca cc
    Ranieri, Luigi
    Naddeo, Vincenzo
    Leiknes, TorOve cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2020-05-21
    Online Publication Date
    2020-05-21
    Print Publication Date
    2020-09
    Submitted Date
    2020-01-04
    Permanent link to this record
    http://hdl.handle.net/10754/663067
    
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    Abstract
    Gravity-driven membrane bioreactors (GD-MBR) have been proposed as a sustainable water treatment due to the low energy requirements in terms of operation. The objective of this study is to investigate the effect of different physical cleaning strategies on the membrane performance in a gravity-driven membrane bioreactor treating primary wastewater. The Optical Coherence Tomography (OCT) allowed evaluating the impact of the physical cleaning on the biomass developed on the membrane surface. Applying relaxation did not enhance the membrane performance, however, it led to an increase in thickness and a decrease in the biomass specific hydraulic resistance. Using air scouring under continuous filtration increased the biomass specific hydraulic resistance by compressing the biomass (~50% decrease in thickness). When air scouring was applied at the end of a relaxation cycle, a higher biomass removal and a significant increase in flux (250%) were observed. Biopolymers were found to constitute 55% of the fouling layer. This study highlighted the suitability of an in-situ monitoring approach as a key tool to evaluate the impact of different physical cleaning strategies on the biomass removal in membrane filtration process.
    Citation
    Fortunato, L., Ranieri, L., Naddeo, V., & Leiknes, T. (2020). Fouling control in a gravity-driven membrane (GDM) bioreactor treating primary wastewater by using relaxation and/or air scouring. Journal of Membrane Science, 610, 118261. doi:10.1016/j.memsci.2020.118261
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST)
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2020.118261
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0376738820308395
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2020.118261
    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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