Do biological-based strategies hold promise to biofouling control in MBRs?

Handle URI:
http://hdl.handle.net/10754/566102
Title:
Do biological-based strategies hold promise to biofouling control in MBRs?
Authors:
Malaeb, Lilian; Le-Clech, Pierre; Vrouwenvelder, Johannes S. ( 0000-0003-2668-2057 ) ; Ayoub, George M.; Saikaly, Pascal ( 0000-0001-7678-3986 )
Abstract:
Biofouling in membrane bioreactors (MBRs) remains a primary challenge for their wider application, despite the growing acceptance of MBRs worldwide. Research studies on membrane fouling are extensive in the literature, with more than 200 publications on MBR fouling in the last 3 years; yet, improvements in practice on biofouling control and management have been remarkably slow. Commonly applied cleaning methods are only partially effective and membrane replacement often becomes frequent. The reason for the slow advancement in successful control of biofouling is largely attributed to the complex interactions of involved biological compounds and the lack of representative-for-practice experimental approaches to evaluate potential effective control strategies. Biofouling is driven by microorganisms and their associated extra-cellular polymeric substances (EPS) and microbial products. Microorganisms and their products convene together to form matrices that are commonly treated as a black box in conventional control approaches. Biological-based antifouling strategies seem to be a promising constituent of an effective integrated control approach since they target the essence of biofouling problems. However, biological-based strategies are in their developmental phase and several questions should be addressed to set a roadmap for translating existing and new information into sustainable and effective control techniques. This paper investigates membrane biofouling in MBRs from the microbiological perspective to evaluate the potential of biological-based strategies in offering viable control alternatives. Limitations of available control methods highlight the importance of an integrated anti-fouling approach including biological strategies. Successful development of these strategies requires detailed characterization of microorganisms and EPS through the proper selection of analytical tools and assembly of results. Existing microbiological/EPS studies reveal a number of implications as well as knowledge gaps, warranting future targeted research. Systematic and representative microbiological studies, complementary utilization of molecular and biofilm characterization tools, standardized experimental methods and validation of successful biological-based antifouling strategies for MBR applications are needed. Specifically, in addition, linking these studies to relevant operational conditions in MBRs is an essential step to ultimately develop a better understanding and more effective and directed control strategy for biofouling. © 2013 Elsevier Ltd.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
Oct-2013
DOI:
10.1016/j.watres.2013.06.033
PubMed ID:
23863390
Type:
Article
ISSN:
00431354
Sponsors:
The preparation of this article was supported by discretionary investigator funds (Pascal Saikaly) at King Abdullah University of Science and Technology (KAUST).
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.authorMalaeb, Lilianen
dc.contributor.authorLe-Clech, Pierreen
dc.contributor.authorVrouwenvelder, Johannes S.en
dc.contributor.authorAyoub, George M.en
dc.contributor.authorSaikaly, Pascalen
dc.date.accessioned2015-08-12T09:28:19Zen
dc.date.available2015-08-12T09:28:19Zen
dc.date.issued2013-10en
dc.identifier.issn00431354en
dc.identifier.pmid23863390en
dc.identifier.doi10.1016/j.watres.2013.06.033en
dc.identifier.urihttp://hdl.handle.net/10754/566102en
dc.description.abstractBiofouling in membrane bioreactors (MBRs) remains a primary challenge for their wider application, despite the growing acceptance of MBRs worldwide. Research studies on membrane fouling are extensive in the literature, with more than 200 publications on MBR fouling in the last 3 years; yet, improvements in practice on biofouling control and management have been remarkably slow. Commonly applied cleaning methods are only partially effective and membrane replacement often becomes frequent. The reason for the slow advancement in successful control of biofouling is largely attributed to the complex interactions of involved biological compounds and the lack of representative-for-practice experimental approaches to evaluate potential effective control strategies. Biofouling is driven by microorganisms and their associated extra-cellular polymeric substances (EPS) and microbial products. Microorganisms and their products convene together to form matrices that are commonly treated as a black box in conventional control approaches. Biological-based antifouling strategies seem to be a promising constituent of an effective integrated control approach since they target the essence of biofouling problems. However, biological-based strategies are in their developmental phase and several questions should be addressed to set a roadmap for translating existing and new information into sustainable and effective control techniques. This paper investigates membrane biofouling in MBRs from the microbiological perspective to evaluate the potential of biological-based strategies in offering viable control alternatives. Limitations of available control methods highlight the importance of an integrated anti-fouling approach including biological strategies. Successful development of these strategies requires detailed characterization of microorganisms and EPS through the proper selection of analytical tools and assembly of results. Existing microbiological/EPS studies reveal a number of implications as well as knowledge gaps, warranting future targeted research. Systematic and representative microbiological studies, complementary utilization of molecular and biofilm characterization tools, standardized experimental methods and validation of successful biological-based antifouling strategies for MBR applications are needed. Specifically, in addition, linking these studies to relevant operational conditions in MBRs is an essential step to ultimately develop a better understanding and more effective and directed control strategy for biofouling. © 2013 Elsevier Ltd.en
dc.description.sponsorshipThe preparation of this article was supported by discretionary investigator funds (Pascal Saikaly) at King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectAnti-biofoulingen
dc.subjectBiofilmen
dc.subjectBiological-baseden
dc.subjectHolistic controlen
dc.subjectManagementen
dc.subjectMembrane bioreactorsen
dc.titleDo biological-based strategies hold promise to biofouling control in MBRs?en
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalWater Researchen
dc.contributor.institutionUNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australiaen
dc.contributor.institutionDepartment of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67, 2628 BC Delft, Netherlandsen
dc.contributor.institutionWetsus, Centre of Excellence for Sustainable Water Technology, Agora 1, 8900 CC Leeuwarden, Netherlandsen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, American University of Beirut, Beirut, Lebanonen
kaust.authorMalaeb, Lilianen
kaust.authorVrouwenvelder, Johannes S.en
kaust.authorSaikaly, Pascalen
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