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    Effect of water temperature on biofouling development in reverse osmosis membrane systems

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    Type
    Article
    Authors
    Farhat, Nadia cc
    Vrouwenvelder, Johannes S. cc
    van Loosdrecht, Mark C.M. cc
    Bucs, Szilard cc
    Staal, Marc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2016-07-16
    Online Publication Date
    2016-07-16
    Print Publication Date
    2016-10
    Permanent link to this record
    http://hdl.handle.net/10754/617089
    
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    Abstract
    Understanding the factors that determine the spatial and temporal biofilm development is a key to formulate effective control strategies in reverse osmosis membrane systems for desalination and wastewater reuse. In this study, biofilm development was investigated at different water temperatures (10, 20, and 30 °C) inside a membrane fouling simulator (MFS) flow cell. The MFS studies were done at the same crossflow velocity with the same type of membrane and spacer materials, and the same feed water type and nutrient concentration, differing only in water temperature. Spatially resolved biofilm parameters such as oxygen decrease rate, biovolume, biofilm spatial distribution, thickness and composition were measured using in-situ imaging techniques. Pressure drop (PD) increase in time was used as a benchmark as to when to stop the experiments. Biofilm measurements were performed daily, and experiments were stopped once the average PD increased to 40 mbar/cm. The results of the biofouling study showed that with increasing feed water temperature (i) the biofilm activity developed faster, (ii) the pressure drop increased faster, while (iii) the biofilm thickness decreased. At an average pressure drop increase of 40 mbar/cm over the MFS for the different feed water temperatures, different biofilm activities, structures, and quantities were found, indicating that diagnosis of biofouling of membranes operated at different or varying (seasonal) feed water temperatures may be challenging. Membrane installations with a high temperature feed water are more susceptible to biofouling than installations fed with low temperature feed water.
    Citation
    Effect of water temperature on biofouling development in reverse osmosis membrane systems 2016 Water Research
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). The authors would like to thank Sergey Borisov for providing the optode material.
    Publisher
    Elsevier BV
    Journal
    Water Research
    DOI
    10.1016/j.watres.2016.07.015
    PubMed ID
    27450353
    Additional Links
    http://linkinghub.elsevier.com/retrieve/pii/S004313541630519X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2016.07.015
    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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