Temporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor

Handle URI:
http://hdl.handle.net/10754/600524
Title:
Temporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor
Authors:
Matar, Gerald Kamil ( 0000-0002-2106-4826 ) ; Gonzalez-Gil, Graciela; Maab, Husnul; Nunes, Suzana Pereira ( 0000-0002-3669-138X ) ; Le-Clech, Pierre; Vrouwenvelder, Johannes S. ( 0000-0003-2668-2057 ) ; Saikaly, Pascal ( 0000-0001-7678-3986 )
Abstract:
Membrane 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.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Temporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor 2016 Water Research
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
2-Mar-2016
DOI:
10.1016/j.watres.2016.02.064
Type:
Article
ISSN:
00431354
Sponsors:
This work was sponsored by King Abdullah University of Science and Technology (KAUST)
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0043135416301233
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMatar, Gerald Kamilen
dc.contributor.authorGonzalez-Gil, Gracielaen
dc.contributor.authorMaab, Husnulen
dc.contributor.authorNunes, Suzana Pereiraen
dc.contributor.authorLe-Clech, Pierreen
dc.contributor.authorVrouwenvelder, Johannes S.en
dc.contributor.authorSaikaly, Pascalen
dc.date.accessioned2016-03-03T12:27:20Zen
dc.date.available2016-03-03T12:27:20Zen
dc.date.issued2016-03-02en
dc.identifier.citationTemporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactor 2016 Water Researchen
dc.identifier.issn00431354en
dc.identifier.doi10.1016/j.watres.2016.02.064en
dc.identifier.urihttp://hdl.handle.net/10754/600524en
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.en
dc.description.sponsorshipThis work was sponsored by King Abdullah University of Science and Technology (KAUST)en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0043135416301233en
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.2016.02.064en
dc.subjectwastewater treatmenten
dc.subjectwater reuseen
dc.subjecthydrophobicityen
dc.subjecthydrophilicityen
dc.subjectmembrane bioreactoren
dc.subjectmembrane biofoulingen
dc.titleTemporal Changes in Extracellular Polymeric Substances on Hydrophobic and Hydrophilic Membrane Surfaces in a Submerged Membrane Bioreactoren
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalWater Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionUNESCO-IHE, Department of Environmental Engineering and Water Technology, Delft, The Netherlandsen
dc.contributor.institutionUNESCO Centre for Membrane Science and Technology, University of New South Wales, NSW 2052, Australiaen
dc.contributor.institutionWetsus, European Center of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlandsen
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlandsen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMatar, Gerald Kamilen
kaust.authorMaab, Husnulen
kaust.authorNunes, Suzana Pereiraen
kaust.authorVrouwenvelder, Johannes S.en
kaust.authorSaikaly, Pascalen
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