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dc.contributor.authorFarhat, Nadia
dc.contributor.authorJavier, L.
dc.contributor.authorVan Loosdrecht, M.C.M.
dc.contributor.authorKruithof, J.C.
dc.contributor.authorVrouwenvelder, Johannes S.
dc.date.accessioned2018-12-04T13:41:59Z
dc.date.available2018-12-04T13:41:59Z
dc.date.issued2018-11-21
dc.identifier.citationFarhat NM, Javier L, Van Loosdrecht MCM, Kruithof JC, Vrouwenvelder JS (2019) Role of feed water biodegradable substrate concentration on biofouling: Biofilm characteristics, membrane performance and cleanability. Water Research 150: 1–11. Available: http://dx.doi.org/10.1016/j.watres.2018.11.054.
dc.identifier.issn0043-1354
dc.identifier.doi10.1016/j.watres.2018.11.054
dc.identifier.urihttp://hdl.handle.net/10754/630152
dc.description.abstractBiofouling severely impacts operational performance of membrane systems increasing the cost of water production. Understanding the effect of critical parameters of feed water such as biodegradable substrate concentration on the developed biofilm characteristics enables development of more effective biofouling control strategies.In this study, the effect of substrate concentration on the biofilm characteristics was examined using membrane fouling simulators (MFSs). A feed channel pressure drop (PD) increase of 200 mbar was used as a benchmark to study the developed biofilm. The amount and characteristics of the formed biofilm were analysed in relation to membrane performance indicators: feed channel pressure drop and permeate flux. The effect of the characteristics of the biofilm developed at three substrate concentrations on the removal efficiency of the different biofilms was evaluated applying acid/base cleaning.Results showed that a higher feed water substrate concentration caused a higher biomass amount, a faster PD increase, but a lower permeate flux decline. The permeate flux decline was affected by the spatial location and the physical characteristics of the biofilm rather than the total amount of biofilm. The slower growing biofilm developed at the lowest substrate concentration was harder to remove by NaOH/HCl cleanings than the biofilm developed at the higher substrate concentrations.Effective biofilm removal is essential to prevent a fast biofilm regrowth after cleaning. While substrate limitation is a generally accepted biofouling control strategy delaying biofouling, development of advanced cleaning methods to remove biofilms formed under substrate limited conditions is of paramount importance.
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0043135418309837
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, [, , (2018-11-21)] DOI: 10.1016/j.watres.2018.11.054 . © 2018. 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.subjectreverse osmosis performance
dc.subjectextracellular polymeric substances (EPS)
dc.subjectchemical cleaning
dc.subjectbiofilm structure
dc.subjectslowly growing biofilms
dc.titleRole of feed water biodegradable substrate concentration on biofouling: biofilm characteristics, membrane performance and cleanability
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.identifier.journalWater Research
dc.eprint.versionPost-print
dc.contributor.institutionDelft University of Technology, Faculty of Applied Sciences, Department of Biotechnology, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
dc.contributor.institutionWetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911, MA, Leeuwarden, the Netherlands
kaust.personFarhat, Nadia
kaust.personJavier, L.
kaust.personVrouwenvelder, Johannes S.
refterms.dateFOA2018-12-04T13:44:23Z
dc.date.published-online2018-11-21
dc.date.published-print2019-03


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