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    In-situ assessment of biofilm formation in submerged membrane system using optical coherence tomography and computational fluid dynamics

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    Type
    Article
    Authors
    Fortunato, Luca cc
    Qamar, Adnan
    Wang, Yiran cc
    Jeong, Sanghyun
    Leiknes, TorOve cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2016-09-09
    Online Publication Date
    2016-09-09
    Print Publication Date
    2017-01
    Permanent link to this record
    http://hdl.handle.net/10754/622302
    
    Metadata
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    Abstract
    This paper introduces a novel approach to study the biofouling development on gravity driven submerged membrane bioreactor (SMBR). The on-line monitoring of biofilm formation on a flat sheet membrane was conducted non-destructively using optical coherence tomography (OCT), allowing the in-situ investigation of the biofilm structure for 43 d. The OCT enabled to obtain a time-lapse of biofilm development on the membrane under the continuous operation. Acquired real-time information on the biofilm structure related to the change in the flux profile confirming the successful monitoring of the dynamic evolution of the biofouling layer. Four different phases were observed linking the permeate flux with the change of biofilm morphology. In particular, a stable flux of 2.1±0.1 L/m2 h was achieved with the achievement of steady biofilm morphology after 30 d of operation. Biofilm descriptors, such as thickness, biofilm area, macro-porosity and roughness (absolute and relative), were calculated for each OCT acquired scans. Interestingly, relative roughness was correlated with the flux decrease. Furthermore, the precise biofilm morphology obtained from the OCT scans was used in computational fluid dynamics (CFD) simulation to better understand the role of biofilm structure on the filtration mechanism. © 2016 Elsevier B.V.
    Citation
    Fortunato L, Qamar A, Wang Y, Jeong S, Leiknes T (2017) In-situ assessment of biofilm formation in submerged membrane system using optical coherence tomography and computational fluid dynamics. Journal of Membrane Science 521: 84–94. Available: http://dx.doi.org/10.1016/j.memsci.2016.09.004.
    Sponsors
    This study was supported by funding from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2016.09.004
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S037673881631506X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2016.09.004
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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