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    Effect of localized hydrodynamics on biofilm attachment and growth in a cross-flow filtration channel

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    Name:
    Effect of_1-s2.0-S004313542031037X-main.pdf
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    1.356Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2022-10-07
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    Type
    Article
    Authors
    Kerdi, Sarah
    Qamar, Adnan
    Vrouwenvelder, Johannes S. cc
    Ghaffour, NorEddine cc
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Date
    2020-10-07
    Embargo End Date
    2022-10-07
    Submitted Date
    2020-07-05
    Permanent link to this record
    http://hdl.handle.net/10754/665490
    
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    Abstract
    Biofilm attachment and growth in membrane filtration systems are considerably influenced by the localized flow inside the feed channel. The present work aims to map the biofilm attachment/growth mechanism under varying flow conditions. Effect of varying clearance region (space between the spacer filament and membrane surface) on biofouling pattern is investigated by using three 3D-printed pillar spacers having different filament diameters of 340, 500, and 1000 µm while maintaining the same pillar orientation, diameter and height. Direct Numerical Simulations (DNS) and Optical Coherence Tomography (OCT) were carried out to accurately predict the local hydrodynamics behavior and in-situ monitor the biofilm formation. On spacer filaments, biofouling attachment is primarily observed in the regions where low and non-fluctuating shear stresses are present. Conversely, on membrane surface, highest biofouling attachment was observed under spacer filaments where high shear stresses are prevalent along with low clearance height. Furthermore, as filtration time progresses, the biofilm grows faster on the membrane in the center of spacer cells where low shear stress with steady hydrodynamics conditions are prevalent. The proposed hydrodynamics approach envisages a full spectrum of spacer design constraints that can lead to intrinsic biofilm mitigation while improving filtration performance of membranes based water treatment.
    Citation
    Kerdi, S., Qamar, A., Vrouwenvelder, J. S., & Ghaffour, N. (2020). Effect of localized hydrodynamics on biofilm attachment and growth in a cross-flow filtration channel. Water Research, 116502. doi:10.1016/j.watres.2020.116502
    Sponsors
    The research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors acknowledge help, assistance and support from the Water Desalination and Reuse Center (WDRC) staff and KAUST Supercomputing Laboratory (KSL).
    Publisher
    Elsevier BV
    Journal
    Water Research
    DOI
    10.1016/j.watres.2020.116502
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S004313542031037X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2020.116502
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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