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    Spatially-resolved in-situ quantification of biofouling using optical coherence tomography (OCT) and 3D image analysis in a spacer filled channel

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    Type
    Article
    Authors
    Fortunato, Luca cc
    Bucs, Szilard cc
    Valladares Linares, Rodrigo cc
    Cali, Corrado
    Vrouwenvelder, Johannes S. cc
    Leiknes, TorOve cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Water Desalination and Reuse Research Center (WDRC)
    Environmental Science and Engineering Program
    Date
    2016-11-21
    Online Publication Date
    2016-11-21
    Print Publication Date
    2017-02
    Permanent link to this record
    http://hdl.handle.net/10754/621853
    
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    Abstract
    The use of optical coherence tomography (OCT) to investigate biomass in membrane systems has increased with time. OCT is able to characterize the biomass in-situ and non-destructively. In this study, a novel approach to process three-dimensional (3D) OCT scans is proposed. The approach allows obtaining spatially-resolved detailed structural biomass information. The 3D biomass reconstruction enables analysis of the biomass only, obtained by subtracting the time zero scan to all images. A 3D time series analysis of biomass development in a spacer filled channel under representative conditions (cross flow velocity) for a spiral wound membrane element was performed. The flow cell was operated for five days with monitoring of ultrafiltration membrane performance: feed channel pressure drop and permeate flux. The biomass development in the flow cell was detected by OCT before a performance decline was observed. Feed channel pressure drop continuously increased with increasing biomass volume, while flux decline was mainly affected in the initial phase of biomass accumulation. The novel OCT imaging approach enabled the assessment of spatial biomass distribution in the flow cell, discriminating the total biomass volume between the membrane, feed spacer and glass window. Biomass accumulation was stronger on the feed spacer during the early stage of biofouling, impacting the feed channel pressure drop stronger than permeate flux.
    Citation
    Fortunato L, Bucs S, Linares RV, Cali C, Vrouwenvelder JS, et al. (2016) Spatially-resolved in-situ quantification of biofouling using optical coherence tomography (OCT) and 3D image analysis in a spacer filled channel. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2016.11.052.
    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.2016.11.052
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0376738816309255
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2016.11.052
    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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