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    Does Chlorination of Seawater Reverse Osmosis Membranes Control Biofouling?

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    Type
    Article
    Authors
    Khan, Muhammad Tariq
    Hong, Pei-Ying cc
    Nada, Nabil
    Croue, Jean Philippe
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Microbial Safety and Biotechnology Lab
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2015-04-11
    Online Publication Date
    2015-04-11
    Print Publication Date
    2015-07
    Permanent link to this record
    http://hdl.handle.net/10754/550087
    
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    Abstract
    Biofouling is the major problem of reverse osmosis (RO) membranes used for desalting seawater (SW). The use of chlorine is a conventional and common practice to control/prevent biofouling. Unlike polyamide RO membranes, cellulose triacetate (CTA) RO membranes display a high chlorine tolerance. Due to this characteristic, CTA membranes are used in most of the RO plants located in the Middle East region where the elevated seawater temperature and water quality promote the risk of membrane biofouling. However, there is no detailed study on the investigation/characterization of CTA-RO membrane fouling. In this investigation, the fouling profile of a full–scale SWRO desalination plant operating with not only continuous chlorination of raw seawater but also intermittent chlorination of CTA-RO membranes was studied. Detailed water quality and membrane fouling analyses were conducted. Profiles of microbiological, inorganic, and organic constituents of analysed fouling layers were extensively discussed. Our results clearly identified biofilm development on these membranes. The incapability of chlorination on preventing biofilm formation on SWRO membranes could be assigned to its failure in effectively reaching throughout the different regions of the permeators. This failure could have occurred due to three main factors: plugging of membrane fibers, chlorine consumption by organics accumulated on the front side fibers, or chlorine adaptation of certain bacterial populations.
    Citation
    Khan, Muhammad Tariq, Pei-Ying Hong, Nabil Nada, and Jean Philippe Croue. "Does Chlorination of Seawater Reverse Osmosis Membranes Control Biofouling?." Water Research (2015).
    Publisher
    Elsevier BV
    Journal
    Water Research
    DOI
    10.1016/j.watres.2015.03.029
    PubMed ID
    25917390
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S0043135415002195
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2015.03.029
    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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