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    Treatment of industrial wastewater produced by desulfurization process in a coal-fired power plant via FO-MD hybrid process

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    Type
    Article
    Authors
    Lee, Songbok
    Kim,Youngjin
    Hong, Seungkwan
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2018-06-30
    Online Publication Date
    2018-06-30
    Print Publication Date
    2018-11
    Permanent link to this record
    http://hdl.handle.net/10754/630446
    
    Metadata
    Show full item record
    Abstract
    In this study, the feasibility of forward osmosis (FO) hybridized with membrane distillation (MD) was systematically investigated for treating flue gas desulfurization (FGD) wastewater. FO experiments were conducted using raw FGD wastewater obtained from a coal-fired power plant in Korea. Severe membrane fouling in FO was observed since FGD wastewater contained various components (i.e., particles, colloids, organics, and ions). The combined fouling layer by particulates and scales was identified via scanning electron microscope (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD). Therefore, fouling control strategies were suggested and evaluated. Microfiltration (MF) pre-treatment was effective in removing particulates and mitigating the initial fouling. Antiscalant-blended draw solution (DS) could inhibit the formation of membrane scaling. With such fouling control schemes, FO achieved the highest recovery rate compared to other desalting processes (i.e., RO and MD), suggesting that FO is suitable for treating wastewater with high fouling potential and high TDS. Finally, the diluted DS was recovered by MD. MD could re-concentrate the diluted DS up to 50% recovery rate with no significant flux decline. Rapid flux decline was then observed due to membrane scaling. Thus, appropriate antiscalants in DS should be considered to inhibit scaling formation in FO and MD simultaneously.
    Citation
    Lee S, Kim Y, Hong S (2018) Treatment of industrial wastewater produced by desulfurization process in a coal-fired power plant via FO-MD hybrid process. Chemosphere 210: 44–51. Available: http://dx.doi.org/10.1016/j.chemosphere.2018.06.180.
    Sponsors
    This research was supported by a grant (18IFIP-B088091-05) from the Industrial Facilities & Infrastructure Research Program funded by the Ministry of Land, Infrastructure and Transport in Korea.
    Publisher
    Elsevier BV
    Journal
    Chemosphere
    DOI
    10.1016/j.chemosphere.2018.06.180
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0045653518312554
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.chemosphere.2018.06.180
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)

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