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dc.contributor.authorPrest, Emmanuelle I E C
dc.contributor.authorStaal, Marc J.
dc.contributor.authorKühl, Michael
dc.contributor.authorvan Loosdrecht, Mark C.M.
dc.contributor.authorVrouwenvelder, Johannes S.
dc.date.accessioned2015-08-03T09:44:55Z
dc.date.available2015-08-03T09:44:55Z
dc.date.issued2012-03
dc.identifier.issn03767388
dc.identifier.doi10.1016/j.memsci.2011.12.003
dc.identifier.urihttp://hdl.handle.net/10754/562106
dc.description.abstractThere is a strong need for techniques enabling direct assessment of biological activity of biofouling in membrane filtration systems. Here we present a new quantitative and non-destructive method for mapping O 2 dynamics in biofilms during biofouling studies in membrane fouling simulators (MFS). Transparent planar O 2 optodes in combination with a luminescence lifetime imaging system were used to map the two-dimensional distribution of O 2 concentrations and consumption rates inside the MFS. The O 2 distribution was indicative for biofilm development. Biofilm activity was characterized by imaging of O 2 consumption rates, where low and high activity areas could be clearly distinguished. The spatial development of O 2 consumption rates, flow channels and stagnant areas could be determined. This can be used for studies on concentration polarization, i.e. salt accumulation at the membrane surface resulting in increased salt passage and reduced water flux. The new optode-based O 2 imaging technique applied to MFS allows non-destructive and spatially resolved quantitative biological activity measurements (BAM) for on-site biofouling diagnosis and laboratory studies. The following set of complementary tools is now available to study development and control of biofouling in membrane systems: (i) MFS, (ii) sensitive pressure drop measurement, (iii) magnetic resonance imaging, (iv) numerical modelling, and (v) biological activity measurement based on O 2 imaging methodology. © 2011 Elsevier B.V.
dc.description.sponsorshipThis work was performed by Wetsus, centre of excellence for sustainable water technology, Delft University of Technology and the Marine Biological Laboratory, University of Copenhagen. Wetsus is funded by the Ministry of Economic Affairs. Additional support was due to grants from the Danish Natural Science Research Council (M. S., M. K.). The authors thank the participants of the Wetsus theme 'Biofouling' for the fruitful discussions and their financial support.
dc.publisherElsevier BV
dc.subjectBiological activity measurement
dc.subjectConcentration polarization
dc.subjectFlow channels
dc.subjectNon-destructive biofouling diagnosis
dc.subjectOptode
dc.titleQuantitative measurement and visualization of biofilm O 2 consumption rates in membrane filtration systems
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.identifier.journalJournal of Membrane Science
dc.contributor.institutionWetsus, Centre of Excellence for Sustainable Water Technology, Agora 1, P.O. Box 1113, 8900 CC Leeuwarden, Netherlands
dc.contributor.institutionMarine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, DK-3000 Helsingør, Denmark
dc.contributor.institutionPlant Functional Biology and Climate Change Cluster, Department of Environmental Science, University of Technology Sydney, Australia
dc.contributor.institutionSingapore Center for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67, 2628 BC Delft, Netherlands
kaust.personVrouwenvelder, Johannes S.


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