In-situ biofilm characterization in membrane systems using Optical Coherence Tomography: Formation, structure, detachment and impact of flux change

Handle URI:
http://hdl.handle.net/10754/563882
Title:
In-situ biofilm characterization in membrane systems using Optical Coherence Tomography: Formation, structure, detachment and impact of flux change
Authors:
Dreszer, C.; Wexler, Adam D.; Drusová, S.; Overdijk, T.; Zwijnenburg, Arie; Flemming, Hans Curt; Kruithof, Joop C.; Vrouwenvelder, Johannes S. ( 0000-0003-2668-2057 )
Abstract:
Biofouling causes performance loss in spiral wound nanofiltration (NF) and reverse osmosis (RO) membrane operation for process and drinking water production. The development of biofilm formation, structure and detachment was studied in-situ, non-destructively with Optical Coherence Tomography (OCT) in direct relation with the hydraulic biofilm resistance and membrane performance parameters: transmembrane pressure drop (TMP) and feed-channel pressure drop (FCP). The objective was to evaluate the suitability of OCT for biofouling studies, applying a membrane biofouling test cell operated at constant crossflow velocity (0.1 m s-1) and permeate flux (20 L m-2h-1).In time, the biofilm thickness on the membrane increased continuously causing a decline in membrane performance. Local biofilm detachment was observed at the biofilm-membrane interface. A mature biofilm was subjected to permeate flux variation (20 to 60 to 20 L m-2h-1). An increase in permeate flux caused a decrease in biofilm thickness and an increase in biofilm resistance, indicating biofilm compaction. Restoring the original permeate flux did not completely restore the original biofilm parameters: After elevated flux operation the biofilm thickness was reduced to 75% and the hydraulic resistance increased to 116% of the original values. Therefore, after a temporarily permeate flux increase the impact of the biofilm on membrane performance was stronger. OCT imaging of the biofilm with increased permeate flux revealed that the biofilm became compacted, lost internal voids, and became more dense. Therefore, membrane performance losses were not only related to biofilm thickness but also to the internal biofilm structure, e.g. caused by changes in pressure.Optical Coherence Tomography proved to be a suitable tool for quantitative in-situ biofilm thickness and morphology studies which can be carried out non-destructively and in real-time in transparent membrane biofouling monitors.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Environmental Science and Engineering Program
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
Dec-2014
DOI:
10.1016/j.watres.2014.09.006
Type:
Article
ISSN:
00431354
Sponsors:
This work was performed at Wetsus, Centre of Excellence for Sustainable Water Technology (www.wetsus.nl). Wetsus is funded by the Dutch Ministry of Economic Affairs, the European Union European Regional Development Fund, the Province of Fryslan, the city of Leeuwarden and by the EZ-KOMPAS Program of the "Samenwerkingsverband Noord-Nederland". The work was funded by Wetsus, the King Abdullah University of Science and Technology (KAUST) and Evides waterbedrijf. The authors like to thank the participants of the Wetsus research theme "Biofouling", KAUST and Evides waterbedrijf for the fruitful discussions and their financial support. In addition the authors would especially like to thank the student Melvin Boelens for his support with the experimental work in the laboratory.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorDreszer, C.en
dc.contributor.authorWexler, Adam D.en
dc.contributor.authorDrusová, S.en
dc.contributor.authorOverdijk, T.en
dc.contributor.authorZwijnenburg, Arieen
dc.contributor.authorFlemming, Hans Curten
dc.contributor.authorKruithof, Joop C.en
dc.contributor.authorVrouwenvelder, Johannes S.en
dc.date.accessioned2015-08-03T12:18:12Zen
dc.date.available2015-08-03T12:18:12Zen
dc.date.issued2014-12en
dc.identifier.issn00431354en
dc.identifier.doi10.1016/j.watres.2014.09.006en
dc.identifier.urihttp://hdl.handle.net/10754/563882en
dc.description.abstractBiofouling causes performance loss in spiral wound nanofiltration (NF) and reverse osmosis (RO) membrane operation for process and drinking water production. The development of biofilm formation, structure and detachment was studied in-situ, non-destructively with Optical Coherence Tomography (OCT) in direct relation with the hydraulic biofilm resistance and membrane performance parameters: transmembrane pressure drop (TMP) and feed-channel pressure drop (FCP). The objective was to evaluate the suitability of OCT for biofouling studies, applying a membrane biofouling test cell operated at constant crossflow velocity (0.1 m s-1) and permeate flux (20 L m-2h-1).In time, the biofilm thickness on the membrane increased continuously causing a decline in membrane performance. Local biofilm detachment was observed at the biofilm-membrane interface. A mature biofilm was subjected to permeate flux variation (20 to 60 to 20 L m-2h-1). An increase in permeate flux caused a decrease in biofilm thickness and an increase in biofilm resistance, indicating biofilm compaction. Restoring the original permeate flux did not completely restore the original biofilm parameters: After elevated flux operation the biofilm thickness was reduced to 75% and the hydraulic resistance increased to 116% of the original values. Therefore, after a temporarily permeate flux increase the impact of the biofilm on membrane performance was stronger. OCT imaging of the biofilm with increased permeate flux revealed that the biofilm became compacted, lost internal voids, and became more dense. Therefore, membrane performance losses were not only related to biofilm thickness but also to the internal biofilm structure, e.g. caused by changes in pressure.Optical Coherence Tomography proved to be a suitable tool for quantitative in-situ biofilm thickness and morphology studies which can be carried out non-destructively and in real-time in transparent membrane biofouling monitors.en
dc.description.sponsorshipThis work was performed at Wetsus, Centre of Excellence for Sustainable Water Technology (www.wetsus.nl). Wetsus is funded by the Dutch Ministry of Economic Affairs, the European Union European Regional Development Fund, the Province of Fryslan, the city of Leeuwarden and by the EZ-KOMPAS Program of the "Samenwerkingsverband Noord-Nederland". The work was funded by Wetsus, the King Abdullah University of Science and Technology (KAUST) and Evides waterbedrijf. The authors like to thank the participants of the Wetsus research theme "Biofouling", KAUST and Evides waterbedrijf for the fruitful discussions and their financial support. In addition the authors would especially like to thank the student Melvin Boelens for his support with the experimental work in the laboratory.en
dc.publisherElsevier BVen
dc.subjectBiofilm morphologyen
dc.subjectFeed-channel pressure dropen
dc.subjectMembrane biofouling monitoren
dc.subjectOCTen
dc.subjectSensitive biofilm thickness measurementen
dc.subjectTransmembrane pressure dropen
dc.titleIn-situ biofilm characterization in membrane systems using Optical Coherence Tomography: Formation, structure, detachment and impact of flux changeen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.identifier.journalWater Researchen
dc.contributor.institutionWetsus, Centre of Excellence for Sustainable Water Technology, Agora 1, P.O. Box 1113CC Leeuwarden, Netherlandsen
dc.contributor.institutionBiofilm Centre, University Duisburg-Essen, Universitätsstrasse 5Essen, Germanyen
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67BC Delft, Netherlandsen
kaust.authorVrouwenvelder, Johannes S.en
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