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dc.contributor.authorSiddiqui, Amber
dc.contributor.authorStaal, Marc
dc.contributor.authorSiddiqui, Amber
dc.contributor.authorBorisov, S.M.
dc.contributor.authorBucs, Szilard
dc.contributor.authorVrouwenvelder, Johannes S.
dc.date.accessioned2015-06-17T13:50:02Z
dc.date.available2015-06-17T13:50:02Z
dc.date.issued2015-06-13
dc.identifier.citationEarly non-destructive biofouling detection and spatial distribution: Application of oxygen sensing optodes 2015 Water Research
dc.identifier.issn00431354
dc.identifier.pmid26117369
dc.identifier.doi10.1016/j.watres.2015.06.015
dc.identifier.urihttp://hdl.handle.net/10754/557009
dc.description.abstractBiofouling is a serious problem in reverse osmosis/nanofiltration (RO/NF) applications, reducing membrane performance. Early detection of biofouling plays an essential role in an adequate anti-biofouling strategy. Presently, fouling of membrane filtration systems is mainly determined by measuring changes in pressure drop, which is not exclusively linked to biofouling. Non-destructive imaging of oxygen concentrations (i) is specific for biological activity of biofilms and (ii) may enable earlier detection of biofilm accumulation than pressure drop. The objective of this study was to test whether transparent luminescent planar O2 optodes, in combination with a simple imaging system, can be used for early non-destructive biofouling detection. This biofouling detection is done by mapping the two-dimensional distribution of O2 concentrations and O2 decrease rates inside a membrane fouling simulator (MFS). Results show that at an early stage, biofouling development was detected by the oxygen sensing optodes while no significant increase in pressure drop was yet observed. Additionally, optodes could detect spatial heterogeneities in biofouling distribution at a micro scale. Biofilm development started mainly at the feed spacer crossings. The spatial and quantitative information on biological activity will lead to better understanding of the biofouling processes, contributing to the development of more effective biofouling control strategies.
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0043135415300658
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Water Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Water Research, 11 June 2015. DOI: 10.1016/j.watres.2015.06.015
dc.subjectearly warning
dc.subjectsensor
dc.subjectimaging
dc.subjectwater treatment
dc.subjectdesalination
dc.titleEarly non-destructive biofouling detection and spatial distribution: Application of oxygen sensing optodes
dc.typeArticle
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater Research
dc.eprint.versionPost-print
dc.contributor.institutionGraz University of Technology, Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9, 8010 Graz, Austria
dc.contributor.institutionDelft University of Technology, Faculty of Applied Sciences, Department of Biotechnology Julianalaan 67, 2628 BC Delft, The Netherlands
dc.contributor.institutionWetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
kaust.personVrouwenvelder, Johannes S.
kaust.personFarhat, Nadia M.
kaust.personStaal, Marc
kaust.personSiddiqui, Amber
kaust.personBucs, Szilard
refterms.dateFOA2017-06-11T00:00:00Z
dc.date.published-online2015-06-13
dc.date.published-print2015-10


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