Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors

Handle URI:
http://hdl.handle.net/10754/582472
Title:
Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors
Authors:
Xiong, Yanghui ( 0000-0002-5009-547X ) ; Harb, Moustapha; Hong, Pei-Ying ( 0000-0002-4474-6600 )
Abstract:
This study compares the membrane fouling mechanisms of aerobic (AeMBR) and anaerobic membrane bioreactors (AnMBR) of the same reactor configuration at similar operating conditions. Although both the AeMBR and AnMBR achieved more than 90% COD removal efficiency, the fouling mechanisms were different. Molecular weight (MW) fingerprint profiles showed that a majority of fragments in anaerobic soluble microbial products (SMP) were retained by the membrane and some fragments were present in both SMP and in soluble extracellular polymeric substances (EPS), suggesting that the physical retention of SMP components contributed to the AnMBR membrane fouling. One of the dominant fragments was comprised of glycoliproprotein (size 630-640 kD) and correlated in abundance in AnMBR-EPS with the extent of anaerobic membrane fouling. In contrast, all detected AeMBR-SMP fragments permeated through the membrane. Aerobic SMP and soluble EPS also showed very different fingerprinting profiles. A large amount of adenosine triphosphate was present in the AeMBR-EPS, suggesting that microbial activity arising from certain bacterial populations, such as unclassified Comamonadaceae and unclassified Chitinophagaceae, may play a role in aerobic membrane fouling. This study underlines the differences in fouling mechanisms between AeMBR and AnMBR systems and can be applied to facilitate the development of appropriate fouling control strategies.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors 2015 Separation and Purification Technology
Publisher:
Elsevier BV
Journal:
Separation and Purification Technology
Issue Date:
17-Nov-2015
DOI:
10.1016/j.seppur.2015.11.024
Type:
Article
ISSN:
13835866
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1383586615303476
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.authorXiong, Yanghuien
dc.contributor.authorHarb, Moustaphaen
dc.contributor.authorHong, Pei-Yingen
dc.date.accessioned2015-11-22T12:06:06Zen
dc.date.available2015-11-22T12:06:06Zen
dc.date.issued2015-11-17en
dc.identifier.citationCharacterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors 2015 Separation and Purification Technologyen
dc.identifier.issn13835866en
dc.identifier.doi10.1016/j.seppur.2015.11.024en
dc.identifier.urihttp://hdl.handle.net/10754/582472en
dc.description.abstractThis study compares the membrane fouling mechanisms of aerobic (AeMBR) and anaerobic membrane bioreactors (AnMBR) of the same reactor configuration at similar operating conditions. Although both the AeMBR and AnMBR achieved more than 90% COD removal efficiency, the fouling mechanisms were different. Molecular weight (MW) fingerprint profiles showed that a majority of fragments in anaerobic soluble microbial products (SMP) were retained by the membrane and some fragments were present in both SMP and in soluble extracellular polymeric substances (EPS), suggesting that the physical retention of SMP components contributed to the AnMBR membrane fouling. One of the dominant fragments was comprised of glycoliproprotein (size 630-640 kD) and correlated in abundance in AnMBR-EPS with the extent of anaerobic membrane fouling. In contrast, all detected AeMBR-SMP fragments permeated through the membrane. Aerobic SMP and soluble EPS also showed very different fingerprinting profiles. A large amount of adenosine triphosphate was present in the AeMBR-EPS, suggesting that microbial activity arising from certain bacterial populations, such as unclassified Comamonadaceae and unclassified Chitinophagaceae, may play a role in aerobic membrane fouling. This study underlines the differences in fouling mechanisms between AeMBR and AnMBR systems and can be applied to facilitate the development of appropriate fouling control strategies.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1383586615303476en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. 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 Separation and Purification Technology, 17 November 2015. DOI: 10.1016/j.seppur.2015.11.024en
dc.subjectMembrane foulingen
dc.subjectMolecular weight of biopolymersen
dc.subjectSoluble microbial producten
dc.subjectExtracellular polymeric substancesen
dc.subjectMicrobial communityen
dc.titleCharacterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactorsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalSeparation and Purification Technologyen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorXiong, Yanghuien
kaust.authorHarb, Moustaphaen
kaust.authorHong, Pei Yingen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.