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    In-situ Non-destructive Studies on Biofouling Processes in Reverse Osmosis Membrane Systems

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    Name:
    Nadia Farhat Dissertation.pdf
    Size:
    4.249Mb
    Format:
    PDF
    Description:
    Nadia Farhat Dissertation
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    Type
    Dissertation
    Authors
    Farhat, Nadia cc
    Advisors
    Vrouwenvelder, Johannes S. cc
    Committee members
    Saikaly, Pascal cc
    Jones, Burton cc
    van Loosdrecht, Mark C.M. cc
    Program
    Environmental Science and Engineering
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Date
    2016-12
    Embargo End Date
    2017-12-06
    Permanent link to this record
    http://hdl.handle.net/10754/621962
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2017-12-06.
    Abstract
    Reverse osmosis (RO) and nanofiltration (NF) membrane systems are high-pressure membrane filtration processes that can produce high quality drinking water. Biofouling, biofilm formation that exceeds a certain threshold, is a major problem in spiral wound RO and NF membrane systems resulting in a decline in membrane performance, produced water quality, and quantity. In practice, detection of biofouling is typically done indirectly through measurements of performance decline. Existing direct biofouling detection methods are mainly destructive, such as membrane autopsies, where biofilm samples can be contaminated, damaged and resulting in biofilm structural changes. The objective of this study was to test whether transparent luminescent planar oxygen sensing optodes, in combination with a simple imaging system, can be used for in-situ, non-destructive biofouling characterization. Aspects of the study were early detection of biofouling, biofilm spatial patterning in spacer filled channels, and the effect of feed cross-flow velocity, and feed flow temperature. Oxygen sensing optode imaging was found suitable for studying biofilm processes and gave detailed spatial and quantitative biofilm development information enabling better understanding of the biofouling development process. The outcome of this study attests the importance of in-situ, non-destructive imaging in acquiring detailed knowledge on biofilm development in membrane systems contributing to the development of effective biofouling control strategies.
    Citation
    Farhat, N. (2016). In-situ Non-destructive Studies on Biofouling Processes in Reverse Osmosis Membrane Systems. KAUST Research Repository. https://doi.org/10.25781/KAUST-H8380
    DOI
    10.25781/KAUST-H8380
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-H8380
    Scopus Count
    Collections
    Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; PhD Dissertations

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