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    Seawater reverse osmosis desalination and (harmful) algal blooms

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    Type
    Article
    Authors
    Villacorte, Loreen O.
    Tabatabai, S. Assiyeh Alizadeh cc
    Anderson, Donald M.
    Amy, Gary L.
    Schippers, Jan Cornelis
    Kennedy, Maria Dolores
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2015-03
    Permanent link to this record
    http://hdl.handle.net/10754/566163
    
    Metadata
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    Abstract
    This article reviews the occurrence of HABs in seawater, their effects on the operation of seawater reverse osmosis (SWRO) plants, the indicators for quantifying/predicting these effects, and the pretreatment strategies for mitigating operational issues during algal blooms. The potential issues in SWRO plants during HABs are particulate/organic fouling of pretreatment systems and biological fouling of RO membranes, mainly due to accumulation of algal organic matter (AOM). The presence of HAB toxins in desalinated water is also a potential concern but only at very low concentrations. Monitoring algal cell density, AOM concentrations and membrane fouling indices is a promising approach to assess the quality of SWRO feedwater and performance of the pretreatment system. When geological condition is favourable, subsurface intake can be a robust pretreatment for SWRO during HABs. Existing SWRO plants with open intake and are fitted with granular media filtration can improve performance in terms of capacity and product water quality, if preceded by dissolved air flotation or sedimentation. However, the application of advanced pretreatment using ultrafiltration membrane with in-line coagulation is often a better option as it is capable of maintaining stable operation and better RO feed water quality during algal bloom periods with significantly lower chemical consumption.
    Citation
    Villacorte, L. O., Tabatabai, S. A. A., Anderson, D. M., Amy, G. L., Schippers, J. C., & Kennedy, M. D. (2015). Seawater reverse osmosis desalination and (harmful) algal blooms. Desalination, 360, 61–80. doi:10.1016/j.desal.2015.01.007
    Sponsors
    This study was conducted with the financial support of UNESCO-IHE Institute for Water Education, Wetsus Centre of Excellence for Sustainable Water Technology and Water Desalination and Reuse Center (KAUST, Saudi Arabia). Support for D. M. Anderson was provided through the Woods Hole Center for Oceans and Human Health, National Science Foundation Grant OCE-1314642 and National Institute of Environmental Health Sciences Grant 1-P01-ES021923-01.
    Publisher
    Elsevier BV
    Journal
    Desalination
    DOI
    10.1016/j.desal.2015.01.007
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2015.01.007
    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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