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dc.contributor.authorMatar, Gerald
dc.contributor.authorGonzalez-Gil, Graciela
dc.contributor.authorMaab, Husnul
dc.contributor.authorNunes, Suzana Pereira
dc.contributor.authorLe-Clech, Pierre
dc.contributor.authorVrouwenvelder, Johannes S.
dc.contributor.authorSaikaly, Pascal
dc.date.accessioned2016-03-03T12:27:20Z
dc.date.available2016-03-03T12:27:20Z
dc.date.issued2016-03-02
dc.identifier.citationTemporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor 2016 Water Research
dc.identifier.issn00431354
dc.identifier.pmid26981765
dc.identifier.doi10.1016/j.watres.2016.02.064
dc.identifier.urihttp://hdl.handle.net/10754/600524
dc.description.abstractMembrane surface hydrophilic modification has always been considered to mitigating biofouling in membrane bioreactors (MBRs). Four hollow-fiber ultrafiltration membranes (pore sizes ∼0.1 μm) differing only in hydrophobic or hydrophilic surface characteristics were operated at a permeate flux of 10 L/m2.h in the same lab-scale MBR fed with synthetic wastewater. In addition, identical membrane modules without permeate production (0 L/m2.h) were operated in the same lab-scale MBR. Membrane modules were autopsied after 1, 10, 20 and 30 days of MBR operation, and total extracellular polymeric substances (EPS) accumulated on the membranes were extracted and characterized in detail using several analytical tools, including conventional colorimetric tests (Lowry and Dubois), liquid chromatography with organic carbon detection (LC-OCD), fluorescence excitation - emission matrices (FEEM), fourier transform infrared (FTIR) and confocal laser scanning microscope (CLSM). The transmembrane pressure (TMP) quickly stabilized with higher values for the hydrophobic membranes than hydrophilic ones. The sulfonated polysulfone (SPSU) membrane had the highest negatively charged membrane surface, accumulated the least amount of foulants and displayed the lowest TMP. The same type of organic foulants developed with time on the four membranes and the composition of biopolymers shifted from protein dominance at early stages of filtration (day 1) towards polysaccharides dominance during later stages of MBR filtration. Nonmetric multidimensional scaling of LC-OCD data showed that biofilm samples clustered according to the sampling event (time) regardless of the membrane surface chemistry (hydrophobic or hydrophilic) or operating mode (with or without permeate flux). These results suggest that EPS composition may not be the dominant parameter for evaluating membrane performance and possibly other parameters such as biofilm thickness, porosity, compactness and structure should be considered in future studies for evaluating the development and impact of biofouling on membrane performance.
dc.description.sponsorshipThis work was sponsored by King Abdullah University of Science and Technology (KAUST)
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0043135416301233
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, 2 March 2016. DOI: 10.1016/j.watres.2016.02.064
dc.subjectwastewater treatment
dc.subjectwater reuse
dc.subjecthydrophobicity
dc.subjecthydrophilicity
dc.subjectmembrane bioreactor
dc.subjectmembrane biofouling
dc.titleTemporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
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.institutionUNESCO-IHE, Department of Environmental Engineering and Water Technology, Delft, The Netherlands
dc.contributor.institutionUNESCO Centre for Membrane Science and Technology, University of New South Wales, NSW 2052, Australia
dc.contributor.institutionWetsus, European Center of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personMatar, Gerald Kamil
kaust.personMaab, Husnul
kaust.personNunes, Suzana Pereira
kaust.personVrouwenvelder, Johannes S.
kaust.personSaikaly, Pascal
refterms.dateFOA2018-03-02T00:00:00Z
dc.date.published-online2016-03-02
dc.date.published-print2016-05


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