• 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 LibguidePlumX LibguideSubmit an Item

    Statistics

    Display statistics

    Biofilm removal efficacy using direct electric current in cross-flow ultrafiltration processes for water treatment

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Biofilm%20removal%20by%20DC%20R2%20unmarked.pdf
    Size:
    1016.Kb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Embargo End Date:
    2022-10-14
    Download
    Thumbnail
    Name:
    1-s2.0-S0376738820313831-mmc1.docx
    Size:
    20.68Kb
    Format:
    Microsoft Word 2007
    Description:
    Appendix A. Supplementary data
    Embargo End Date:
    2022-10-14
    Download
    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
    2020-10-14
    Online Publication Date
    2020-10-14
    Print Publication Date
    2020-10
    Embargo End Date
    2022-10-14
    Submitted Date
    2020-06-17
    Permanent link to this record
    http://hdl.handle.net/10754/665595
    
    Metadata
    Show full item record
    Abstract
    Biofouling of membranes in water treatment is considered as one of the major practical problems. A novel and an efficient approach for cleaning biofilm grown on the membrane surface is proposed by applying a direct electric current (124 mA, 90 s) through platinum electrodes inside a cross-flow ultrafiltration channel. Depending on the electrochemical reactions occurring at the electrodes, either chlorine or hydrogen-producing configuration is realized by interchanging the current polarity. Baseline determination of the amount of chlorine generated and change in pH is assessed as a function of current intensity, linear cross-flow velocity, and duration of applied current. The efficiency of the proposed method is determined by investigating electrically treated biofilm through bacterial inactivation using Confocal Laser Scanning Microscopy (CLSM), bacterial cell structure changes through Scanning Electron Microscopy (SEM), and by estimating the amount of biomass removal through Optical Coherence Tomography (OCT). When a chlorine-producing electrode is placed at the inlet of the flow cell, 68% of bacterial inactivation is achieved without any modification of bacterial cell shape. Furthermore, a high and near-complete biomass removal is achieved (99%) after a subsequent forward flush of the electrically treated biofilm. However, placing a hydrogen-producing electrode at the inlet reveals a slightly lower bacterial inactivation (65%) and lower biomass removal (77%). Additional systematic experiments using individually sodium hydroxide (NaOH), sodium hypochlorite (NaOCl), or gas microbubbles enabled to elucidate the cause of biofilm removal, synergic effect of caustic agent NaOH and microbubbles.
    Citation
    Kerdi, S., Qamar, A., Vrouwenvelder, J. S., & Ghaffour, N. (2020). Biofilm removal efficacy using direct electric current in cross-flow ultrafiltration processes for water treatment. Journal of Membrane Science, 118808. doi:10.1016/j.memsci.2020.118808
    Sponsors
    The research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors extend their gratitude to the Water Desalination and Reuse Center (WDRC) staff for their continuous support. Imaging and Characterization Lab (ICL) staff is also highly acknowledged for their assistance and support in this project.
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2020.118808
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0376738820313831
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2020.118808
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

    entitlement

     
    DSpace software copyright © 2002-2021  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    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.