Biofouling Control in Spiral-Wound Membrane Systems: Impact of Feed Spacer Modification and Biocides

Handle URI:
http://hdl.handle.net/10754/621963
Title:
Biofouling Control in Spiral-Wound Membrane Systems: Impact of Feed Spacer Modification and Biocides
Authors:
Siddiqui, Amber ( 0000-0002-0588-8876 )
Abstract:
High-quality drinking water can be produced with membrane-based filtration processes like reverse osmosis and nanofiltration. One of the major problems in these membrane systems is biofouling that reduces the membrane performance, increasing operational costs. Current biofouling control strategies such as pre-treatment, membrane modification, and chemical cleaning are not sufficient in all cases. Feed spacers are thin (0.8 mm), complex geometry meshes that separate membranes in a module. The main objective of this research was to evaluate whether feed spacer modification is a suitable strategy to control biofouling. Membrane fouling simulator studies with six feed spacers showed differences in biofouled spacer performance, concluding that (i) spacer geometry influences biofouling impact and (ii) biofouling studies are essential for evaluation of spacer biofouling impact. Computed tomography (CT) was found as a suitable technique to obtain three-dimensional (3D) measurements of spacers, enabling more representative mathematical modeling of hydraulic behavior of spacers in membrane systems. A strategy for developing, characterizing, and testing of spacers by numerical modeling, 3D printing of spacers and experimental membrane fouling simulator studies was developed. The combination of modeling and experimental testing of 3D printed spacers is a promising strategy to develop advanced spacers aiming to reduce the impact of biofilm formation on membrane performance and to improve the cleanability of spiral-wound membrane systems.
Advisors:
Vrouwenvelder, Johannes S. ( 0000-0003-2668-2057 )
Committee Member:
Saikaly, Pascal ( 0000-0001-7678-3986 ) ; Jones, Burton ( 0000-0002-9599-1593 ) ; Loosdrecht, Mark
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Program:
Environmental Science and Engineering
Issue Date:
Dec-2016
Type:
Dissertation
Appears in Collections:
Dissertations

Full metadata record

DC FieldValue Language
dc.contributor.advisorVrouwenvelder, Johannes S.en
dc.contributor.authorSiddiqui, Amberen
dc.date.accessioned2016-12-07T10:28:36Z-
dc.date.available2016-12-07T10:28:36Z-
dc.date.issued2016-12-
dc.identifier.urihttp://hdl.handle.net/10754/621963-
dc.description.abstractHigh-quality drinking water can be produced with membrane-based filtration processes like reverse osmosis and nanofiltration. One of the major problems in these membrane systems is biofouling that reduces the membrane performance, increasing operational costs. Current biofouling control strategies such as pre-treatment, membrane modification, and chemical cleaning are not sufficient in all cases. Feed spacers are thin (0.8 mm), complex geometry meshes that separate membranes in a module. The main objective of this research was to evaluate whether feed spacer modification is a suitable strategy to control biofouling. Membrane fouling simulator studies with six feed spacers showed differences in biofouled spacer performance, concluding that (i) spacer geometry influences biofouling impact and (ii) biofouling studies are essential for evaluation of spacer biofouling impact. Computed tomography (CT) was found as a suitable technique to obtain three-dimensional (3D) measurements of spacers, enabling more representative mathematical modeling of hydraulic behavior of spacers in membrane systems. A strategy for developing, characterizing, and testing of spacers by numerical modeling, 3D printing of spacers and experimental membrane fouling simulator studies was developed. The combination of modeling and experimental testing of 3D printed spacers is a promising strategy to develop advanced spacers aiming to reduce the impact of biofilm formation on membrane performance and to improve the cleanability of spiral-wound membrane systems.en
dc.language.isoenen
dc.subjectBiofoulingen
dc.subjectModified spacesen
dc.subjectbiocidesen
dc.subjectDesalinationen
dc.subjectreverse osmosisen
dc.subjectMembranesen
dc.titleBiofouling Control in Spiral-Wound Membrane Systems: Impact of Feed Spacer Modification and Biocidesen
dc.typeDissertationen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberSaikaly, Pascalen
dc.contributor.committeememberJones, Burtonen
dc.contributor.committeememberLoosdrecht, Marken
thesis.degree.disciplineEnvironmental Science and Engineeringen
thesis.degree.nameDoctor of Philosophyen
dc.person.id113315en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.