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dc.contributor.authorDesmond, Peter
dc.contributor.authorHuisman, Kees Theo
dc.contributor.authorSanawar, Huma
dc.contributor.authorFarhat, Nadia
dc.contributor.authorTraber, Jacqueline
dc.contributor.authorFridjonsson, Einar O
dc.contributor.authorJohns, Michael L
dc.contributor.authorFlemming, Hans-Curt
dc.contributor.authorPicioreanu, Cristian
dc.contributor.authorVrouwenvelder, Johannes S.
dc.date.accessioned2022-01-17T07:38:12Z
dc.date.available2022-01-17T07:38:12Z
dc.date.issued2022-01-08
dc.date.submitted2021-08-05
dc.identifier.citationDesmond, P., Huisman, K. T., Sanawar, H., Farhat, N. M., Traber, J., Fridjonsson, E. O., … Vrouwenvelder, J. S. (2022). Controlling the hydraulic resistance of membrane biofilms by engineering biofilm physical structure. Water Research, 210, 118031. doi:10.1016/j.watres.2021.118031
dc.identifier.issn0043-1354
dc.identifier.pmid34998071
dc.identifier.doi10.1016/j.watres.2021.118031
dc.identifier.urihttp://hdl.handle.net/10754/674974
dc.description.abstractThe application of membrane technology for water treatment and reuse is hampered by the development of a microbial biofilm. Biofilm growth in micro-and ultrafiltration (MF/UF) membrane modules, on both the membrane surface and feed spacer, can form a secondary membrane and exert resistance to permeation and crossflow, increasing energy demand and decreasing permeate quantity and quality. In recent years, exhaustive efforts were made to understand the chemical, structural and hydraulic characteristics of membrane biofilms. In this review, we critically assess which specific structural features of membrane biofilms exert resistance to forced water passage in MF/UF membranes systems applied to water and wastewater treatment, and how biofilm physical structure can be engineered by process operation to impose less hydraulic resistance ("below-the-pain threshold"). Counter-intuitively, biofilms with greater thickness do not always cause a higher hydraulic resistance than thinner biofilms. Dense biofilms, however, had consistently higher hydraulic resistances compared to less dense biofilms. The mechanism by which density exerts hydraulic resistance is reported in the literature to be dependant on the biofilms' internal packing structure and EPS chemical composition (e.g., porosity, polymer concentration). Current reports of internal porosity in membrane biofilms are not supported by adequate experimental evidence or by a reliable methodology, limiting a unified understanding of biofilm internal structure. Identifying the dependency of hydraulic resistance on biofilm density invites efforts to control the hydraulic resistance of membrane biofilms by engineering internal biofilm structure. Regulation of biofilm internal structure is possible by alteration of key determinants such as feed water nutrient composition/concentration, hydraulic shear stress and resistance and can engineer biofilm structural development to decrease density and therein hydraulic resistance. Future efforts should seek to determine the extent to which the concept of "biofilm engineering" can be extended to other biofilm parameters such as mechanical stability and the implication for biofilm control/removal in engineered water systems (e.g., pipelines and/or, cooling towers) susceptible to biofouling.
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST) and RWTH-Aachen University (2020).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0043135421012252
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, [210, , (2022-01-08)] DOI: 10.1016/j.watres.2021.118031 . © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectDensity
dc.subjectBiofilm
dc.subjectHydraulic resistance
dc.subjectMembrane Filtration
dc.subjectPhysical Structure
dc.titleControlling the hydraulic resistance of membrane biofilms by engineering biofilm physical structure.
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Science and Engineering (BESE) Division
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater research
dc.rights.embargodate2024-01-08
dc.eprint.versionPost-print
dc.contributor.institutionInstitute of Environmental Engineering, RWTH Aachen University, Mies-van-der-Rohe-Strasse 1, D52074 Aachen, Germany.
dc.contributor.institutionDepartment of Process Engineering, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Dübendorf 8600, Switzerland.
dc.contributor.institutionDepartment of Chemical Engineering, The University of Western Australia, Crawley, WA 6009, Australia.
dc.contributor.institutionSingapore Centre for Environmental Life Sciences Engineering (SCELSE), 60 Nanyang Drive, 637551, Singapore.
dc.contributor.institutionBiofilm Centre, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, 45141, Essen, Germany.
dc.contributor.institutionIWW Water Centre, Moritzstrasse 26, 45476, Muelheim, Germany.
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ, Delft, Netherlands.
dc.identifier.volume210
dc.identifier.pages118031
kaust.personHuisman, Kees Theo
kaust.personSanawar, Huma
kaust.personFarhat, Nadia M.
kaust.personPicioreanu, Cristian
kaust.personVrouwenvelder, Johannes S.
dc.date.accepted2021-12-29


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