• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguideTheses and Dissertations LibguideSubmit an Item

    Statistics

    Display statistics

    Membrane filtration performance enhancement and biofouling mitigation using symmetric spacers with helical filaments

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Helical%20spacer%20manuscript%20Desalination%20R1%20unmarked.pdf
    Size:
    1.104Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Download
    Type
    Article
    Authors
    Kerdi, Sarah
    Qamar, Adnan
    Alpatova, Alla
    Vrouwenvelder, Johannes S. cc
    Ghaffour, NorEddine cc
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Environmental Science and Engineering Program
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2020-04-02
    Online Publication Date
    2020-04-02
    Print Publication Date
    2020-06
    Embargo End Date
    2022-04-02
    Permanent link to this record
    http://hdl.handle.net/10754/662425
    
    Metadata
    Show full item record
    Abstract
    Optimization of the feed spacer geometry is one of the key challenges for improved ultrafiltration performance in water treatment and desalination. Novel feed spacers with different number of helices (1-3) along the spacer filament are proposed. To elucidate the intrinsic ability of the helical feature on filtration process improvement, experiments were conducted at two different fluid inlet velocities (U0 = 0.166 m/s and 0.182 m/s). The presence of micro-helices in the filaments aids significantly in increasing the specific permeate flux when compared to the standard spacer (without helices). The highest improvement was observed in the case of 3-helical spacer (291% specific permeate flux increase at U0 = 0.182 m/s). Furthermore, Optical Coherence Tomography OCT) imaging demonstrated less (bio)fouling amount developed on membrane surface equipped with helical spacers, whereas, a thicker and more dense cake fouling layer appeared in the case of standard spacer. Moreover, novel helical design spacers reduce the pressure drop inside the channel. The 3-helical spacer was found to have the least feed-channel pressure drop (65% of decrease relative to standard spacer). Numerical analysis was simultaneously realized by the Direct Numerical Simulation (DNS) technique to understand the hydrodynamic behavior at an elemental level inside the filtration channel. Low shear stress and high local velocity magnitudes were observed in presence of helical spacers resulting in (bio)fouling mitigation on filtration membrane surface.
    Citation
    Kerdi, S., Qamar, A., Alpatova, A., Vrouwenvelder, J. S., & Ghaffour, N. (2020). Membrane filtration performance enhancement and biofouling mitigation using symmetric spacers with helical filaments. Desalination, 484, 114454. doi:10.1016/j.desal.2020.114454
    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
    Desalination
    DOI
    10.1016/j.desal.2020.114454
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0011916420302794
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2020.114454
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

    entitlement

     
    DSpace software copyright © 2002-2023  DuraSpace
    Quick Guide | Contact Us | KAUST University Library
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.