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    Evaluating the efficiency of different microfiltration and ultrafiltration membranes used as pretreatment for Red Sea water reverse osmosis desalination

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    Type
    Article
    Authors
    Almashharawi, Samir
    Ghaffour, NorEddine cc
    Al-Ghamdi, M.
    Amy, Gary L.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2012-06-18
    Online Publication Date
    2012-06-18
    Print Publication Date
    2013-01
    Permanent link to this record
    http://hdl.handle.net/10754/562588
    
    Metadata
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    Abstract
    Conventional processes are widely used as pretreatment for reverse osmosis (RO) desalination technology since its development. However, these processes require a large footprint and have some limitation issues such as difficulty to maintain a consistent silt density index, coagulation control at low total suspended solids, and management of higher waste sludge. Recently, there has been a rapid growth in the use of low-pressure membranes as pretreatment for RO systems replacing the conventional processes. However, despite the numerous advantages of using this integrated membrane system mainly providing good and stable water quality to RO membranes, many issues have to be addressed. The primary limitation is membrane fouling which reduces the permeate flux; therefore, higher pumping intensity is required to maintain a consistent volume of product. This paper aims to optimize the permeation flux and cleaning frequency by providing high permeate quality. Different low-pressure polyethersulfone membranes with different pore sizes ranging from 0.1 lm to 50 kDa were tested. Eight different filtration configurations have been applied including the variation of coagulant doses aiming to control membrane fouling. Results showed that all the configurations with/without coagulation, provided permeate with excellent water quality which improves the stability of RO performance. However, more stable fluxes with less-energy consumption were achieved by using the 0.1 lm and 100 kDa membranes with 1 mg/L FeCl3 coagulation. The use of UF membranes, having tight pores, without coagulation also proved to be an excellent option for Red Sea water RO pretreatment. © 2013 Desalination Publications.
    Citation
    Al-Mashharawi, S. K., Ghaffour, N., Al-Ghamdi, M., & Amy, G. L. (2012). Evaluating the efficiency of different microfiltration and ultrafiltration membranes used as pretreatment for Red Sea water reverse osmosis desalination. Desalination and Water Treatment, 51(1-3), 617–626. doi:10.1080/19443994.2012.699449
    Publisher
    Informa UK Limited
    Journal
    Desalination and Water Treatment
    DOI
    10.1080/19443994.2012.699449
    ae974a485f413a2113503eed53cd6c53
    10.1080/19443994.2012.699449
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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