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Article: Membrane biofouling and scaling in forward osmosis membrane bioreactor

TitleMembrane biofouling and scaling in forward osmosis membrane bioreactor
Authors
KeywordsForward Osmosis
Membrane Bioreactor
Membrane Fouling
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2012, v. 403-404, p. 8-14 How to Cite?
AbstractThe forward osmosis membrane bioreactor (FOMBR) has received much attention recently. Due to the high rejection nature of FO membranes, the biomass, dissolved organic and inorganic compounds retained in the bioreactor could cause membrane fouling by multiple mechanisms. In this study, a 45% permeate flux decrease was observed in a well controlled FOMBR equipped with a submerged hollow fiber FO membrane module with the active layer facing the draw solution (AL-DS) configuration. A series of characterizations were performed to explore membrane fouling mechanisms in the FOMBR. It was found that a biofouling layer covered the substrate surface of the FO membrane with a combined structure of bacterial clusters and extracellular polymeric substances (EPS), which contributed to 72% drop of the membrane mass transfer coefficient (K m) and around 10% increase in the hydraulic resistance. The inorganic fouling was caused by Ca, Mg, Al, Si, Fe and P that contributed 60% of the total hydraulic resistance of the fouled membrane and decreased the K m by around 34%. These results suggest that in this application the FO fouling is governed by the coupled influences of biofilm formation and inorganic scaling. When the configuration was reversed with the active layer facing the feed solution (AL-FS), a negligible flux decline was obtained by applying intermittent tap water flushing to the membrane surface, which suggests that the AL-FS orientation is favorable for FOMBR operation. An effective strategy for fouling control is to prevent internal scaling and the over-growth of biofilm on the membrane surface. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185425
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Jen_US
dc.contributor.authorLoong, WLCen_US
dc.contributor.authorChou, Sen_US
dc.contributor.authorTang, Cen_US
dc.contributor.authorWang, Ren_US
dc.contributor.authorFane, AGen_US
dc.date.accessioned2013-07-30T07:32:26Z-
dc.date.available2013-07-30T07:32:26Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Membrane Science, 2012, v. 403-404, p. 8-14en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185425-
dc.description.abstractThe forward osmosis membrane bioreactor (FOMBR) has received much attention recently. Due to the high rejection nature of FO membranes, the biomass, dissolved organic and inorganic compounds retained in the bioreactor could cause membrane fouling by multiple mechanisms. In this study, a 45% permeate flux decrease was observed in a well controlled FOMBR equipped with a submerged hollow fiber FO membrane module with the active layer facing the draw solution (AL-DS) configuration. A series of characterizations were performed to explore membrane fouling mechanisms in the FOMBR. It was found that a biofouling layer covered the substrate surface of the FO membrane with a combined structure of bacterial clusters and extracellular polymeric substances (EPS), which contributed to 72% drop of the membrane mass transfer coefficient (K m) and around 10% increase in the hydraulic resistance. The inorganic fouling was caused by Ca, Mg, Al, Si, Fe and P that contributed 60% of the total hydraulic resistance of the fouled membrane and decreased the K m by around 34%. These results suggest that in this application the FO fouling is governed by the coupled influences of biofilm formation and inorganic scaling. When the configuration was reversed with the active layer facing the feed solution (AL-FS), a negligible flux decline was obtained by applying intermittent tap water flushing to the membrane surface, which suggests that the AL-FS orientation is favorable for FOMBR operation. An effective strategy for fouling control is to prevent internal scaling and the over-growth of biofilm on the membrane surface. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memscien_US
dc.relation.ispartofJournal of Membrane Scienceen_US
dc.subjectForward Osmosisen_US
dc.subjectMembrane Bioreactoren_US
dc.subjectMembrane Foulingen_US
dc.titleMembrane biofouling and scaling in forward osmosis membrane bioreactoren_US
dc.typeArticleen_US
dc.identifier.emailTang, C: tangc@hku.hken_US
dc.identifier.authorityTang, C=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.memsci.2012.01.032en_US
dc.identifier.scopuseid_2-s2.0-84862816826en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84862816826&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume403-404en_US
dc.identifier.spage8en_US
dc.identifier.epage14en_US
dc.identifier.isiWOS:000302323700002-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZhang, J=14010227000en_US
dc.identifier.scopusauthoridLoong, WLC=55260970500en_US
dc.identifier.scopusauthoridChou, S=36019076000en_US
dc.identifier.scopusauthoridTang, C=35489259800en_US
dc.identifier.scopusauthoridWang, R=7405339682en_US
dc.identifier.scopusauthoridFane, AG=55132709000en_US

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