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    Effect of air gap membrane distillation parameters on the removal of fluoride from synthetic water

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    124_2018_11.pdf
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    Type
    Article
    Authors
    Naji, Osamah
    Bowtell, Les
    Al-juboori, Raed A
    Aravinthan, Vasantha
    Ghaffour, NorEddine cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2018
    Permanent link to this record
    http://hdl.handle.net/10754/629967
    
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    Abstract
    As freshly available water around the world becomes scarcer, schemes to reuse and rectify contaminated water sources are becoming a necessity. The implementation of conventional treatment processes increases stress on existing infrastructure resources, requiring significant quantities of energy and/or chemicals, including pre-treatment processes and ongoing maintenance. An unconventional alternative to these processes is air-gap membrane distillation (AGMD), an emerging technology delivering excellent rejection of contaminants over a broad range of operating conditions. While showing great promise, the size of membrane distillation systems in existing literature is not readily scaled to industrial levels. In this paper, we present the results of our research in terms of permeate quality, rejection efficiency and scalability of a large laboratory scale AGMD system, with effective area of approximately 25 times larger than those presented in previous studies. This study found a large discrepancy in flux production when compared with small scale results, with experimental data analysed using normality and residual analysis tests. Statistical analysis of the AGMD process data provides insight into the key driving forces and interactions of feedwater temperature, concentration and flowrate on flux production. Results showed excellent rejection of contaminants (>98%) along with some fouling evident after approximately 25 h of operation.
    Citation
    Naji O, Bowtell L, Al-juboori Raed A , Aravinthan V, Ghaffour N (2018) Effect of air gap membrane distillation parameters on the removal of fluoride from synthetic water. DESALINATION AND WATER TREATMENT 124: 11–20. Available: http://dx.doi.org/10.5004/dwt.2018.22694.
    Sponsors
    The research reported in this paper was supported by University of Southern Queensland, and Ministry of Higher Education and Scientific Research (Iraq). We would also like to thank our industry partners for their help and assistance. In particular, we would like to acknowledge the technical support of the Scarab Co. staff and provision of membranes from Donaldson filtration.
    Publisher
    Desalination Publications
    Journal
    DESALINATION AND WATER TREATMENT
    DOI
    10.5004/dwt.2018.22694
    Additional Links
    http://www.deswater.com/DWT_articles/vol_124_papers/124_2018_11.pdf
    ae974a485f413a2113503eed53cd6c53
    10.5004/dwt.2018.22694
    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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