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    Effect of minimal pre-treatment on reverse osmosis using surface water as a source

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    Name:
    DES-D-21-00076_R1_paper.pdf
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    2.782Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Embargo End Date:
    2023-04-12
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    Type
    Article
    Authors
    Cornelissen, E. R.
    Harmsen, D. J.H.
    Blankert, Bastiaan
    Wessels, L. P.
    van der Meer, W. G.J.
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2021-04-13
    Online Publication Date
    2021-04-13
    Print Publication Date
    2021-08
    Embargo End Date
    2023-04-12
    Submitted Date
    2021-01-18
    Permanent link to this record
    http://hdl.handle.net/10754/668943
    
    Metadata
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    Abstract
    Reverse osmosis is increasingly used in drinking water supply for treatment of fresh water sources which can directly result in high quality water. In practice reverse osmosis is never applied directly on fresh water sources, predominantly because of the occurrence of membrane fouling. Strategies to control membrane fouling in reverse osmosis without expensive and extensive pre-treatment include low flux operation, increase cross-flow velocities and improved (periodic) hydraulic cleaning. The objective of this research is to technically and economically compare minimal pre-treated reverse osmosis to state-of-the art ultrafiltration pre-treated reverse osmosis in surface water treatment to obtain high quality water. A parallel reverse osmosis system with six parallel 2540-type spiral wound membrane elements has been systematically operated during several months with only screens pre-treatment before reverse osmosis. A minimal pre-treated reverse osmosis system using only screens on surface water did not result in stable reverse osmosis operation, however, the ultrafiltration pre-treated reverse osmosis system also failed in the longer run. Lowering the membrane flux from 25 L/m2.h to 10 L/m2.h in minimal pre-treated RO resulted in an approximately 10-fold decrease of the membrane fouling rate, while not influencing the pressure drop increase. Periodical air water cleaning in minimal pre-treated RO resulted in an approximately 4-fold reduction of the spacer clogging rate, while not affecting the membrane fouling rate. The total cost of a minimal pre-treated low flux (10 L/m2.h) operated RO was significantly lower (0.46 €/m3) compared to state-of-the-art UF pre-treated RO at normal flux (25 L/m2.h) (1.21 €/m3). The cost difference in financial space provides an opportunity to develop minimal pre-treated RO systems with improved control of membrane fouling and spacer clogging.
    Citation
    Cornelissen, E. R., Harmsen, D. J. H., Blankert, B., Wessels, L. P., & van der Meer, W. G. J. (2021). Effect of minimal pre-treatment on reverse osmosis using surface water as a source. Desalination, 509, 115056. doi:10.1016/j.desal.2021.115056
    Sponsors
    This activity is co-financed with PPS-funding from the Topconsortia for Knowledge & Innovation (TKI's) of the Ministry of Economic Affairs and Climate. Harry van Wegen and Sidney Meijering (KWR, The Netherlands) are acknowledged for their help during the construction of the pilot. Peter Wessels was working for WE Consult during the research described in this work.
    Publisher
    Elsevier BV
    Journal
    Desalination
    DOI
    10.1016/j.desal.2021.115056
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0011916421001272
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2021.115056
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)

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