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    Methane production in an anaerobic osmotic membrane bioreactor using forward osmosis: Effect of reverse salt flux

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    Type
    Article
    Authors
    Li, Sheng cc
    Kim, Youngjin cc
    Phuntsho, Sherub
    Chekli, Laura
    Kyong Shon, Ho
    Leiknes, TorOve cc
    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
    2017-05-10
    Online Publication Date
    2017-05-10
    Print Publication Date
    2017-09
    Permanent link to this record
    http://hdl.handle.net/10754/623641
    
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    Abstract
    This study investigated the impact of reverse salt flux (RSF) on microbe community and bio-methane production in a simulated fertilizer driven FO-AnMBR system using KCl, KNO3 and KH2PO4 as draw solutes. Results showed that KH2PO4 exhibited the lowest RSF in terms of molar concentration 19.1 mM/(m2.h), while for KCl and KNO3 it was 32.2 and 120.8 mM/(m2.h), respectively. Interestingly, bio-methane production displayed an opposite order with KH2PO4, followed by KCl and KNO3. Pyrosequencing results revealed the presence of different bacterial communities among the tested fertilizers. Bacterial community of sludge exposed to KH2PO4 was very similar to that of DI-water and KCl. However, results with KNO3 were different since the denitrifying bacteria were found to have a higher percentage than the sludge with other fertilizers. This study demonstrated that RSF has a negative effect on bio-methane production, probably by influencing the sludge bacterial community via environment modification.
    Citation
    Li S, Kim Y, Phuntsho S, Chekli L, Kyong Shon H, et al. (2017) Methane production in an anaerobic osmotic membrane bioreactor using forward osmosis: Effect of reverse salt flux. Bioresource Technology. Available: http://dx.doi.org/10.1016/j.biortech.2017.05.044.
    Sponsors
    The research reported in this paper was supported from the SEED program of King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The help, assistance and support of the Water Desalination and Reuse Center (WDRC) at KAUST staff are greatly appreciated.
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology
    DOI
    10.1016/j.biortech.2017.05.044
    PubMed ID
    28531853
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0960852417306831
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biortech.2017.05.044
    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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