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Article: Direct microscopic observation of forward osmosis membrane fouling by microalgae: Critical flux and the role of operational conditions

TitleDirect microscopic observation of forward osmosis membrane fouling by microalgae: Critical flux and the role of operational conditions
Authors
KeywordsCritical Concentration
Critical Flux
Direct Microscopic Observation
Forward Osmosis
Fouling Reversibility
Microalgae
Issue Date2013
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2013, v. 436, p. 174-185 How to Cite?
AbstractOsmotically-driven membrane processes such as forward osmosis (FO) and pressure retarded osmosis (PRO) have interesting applications in the water and energy domains. When surface water is used as feed solution (FS) for FO and PRO, these membranes can be fouled by microalgae that are ubiquitous in rivers, lakes, and seawater. This study systematically investigates FO/PRO fouling by a model microalgae Chlorella sorokiniana. Direct microscopic observation was used to characterize FO/PRO fouling in conjunction with water flux measurements. The study demonstrated that direct microscopic observation can be highly valuable in characterizing the deposition of microalgae on FO/PRO membrane. Using a concentration stepping method, a critical flux (critical concentration) behavior was revealed. Stable flux can be achieved by operating below the critical flux (critical concentration) level. Microalgal FO/PRO fouling was more severe and less reversible when divalent Mg2+ ions were present in the FS and the draw solution (DS). The use of Mg2+-based DS can promote severe fouling due to the reverse diffusion of Mg2+ into the FS, even if Mg2+ is not present in the original FS. The use of FS spacer was beneficial in enhancing the initial flux as well as reducing the tendency of membrane fouling. © 2013 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185444
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZou, Sen_US
dc.contributor.authorWang, YNen_US
dc.contributor.authorWicaksana, Fen_US
dc.contributor.authorAung, Ten_US
dc.contributor.authorWong, PCYen_US
dc.contributor.authorFane, AGen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:36Z-
dc.date.available2013-07-30T07:32:36Z-
dc.date.issued2013en_US
dc.identifier.citationJournal Of Membrane Science, 2013, v. 436, p. 174-185en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185444-
dc.description.abstractOsmotically-driven membrane processes such as forward osmosis (FO) and pressure retarded osmosis (PRO) have interesting applications in the water and energy domains. When surface water is used as feed solution (FS) for FO and PRO, these membranes can be fouled by microalgae that are ubiquitous in rivers, lakes, and seawater. This study systematically investigates FO/PRO fouling by a model microalgae Chlorella sorokiniana. Direct microscopic observation was used to characterize FO/PRO fouling in conjunction with water flux measurements. The study demonstrated that direct microscopic observation can be highly valuable in characterizing the deposition of microalgae on FO/PRO membrane. Using a concentration stepping method, a critical flux (critical concentration) behavior was revealed. Stable flux can be achieved by operating below the critical flux (critical concentration) level. Microalgal FO/PRO fouling was more severe and less reversible when divalent Mg2+ ions were present in the FS and the draw solution (DS). The use of Mg2+-based DS can promote severe fouling due to the reverse diffusion of Mg2+ into the FS, even if Mg2+ is not present in the original FS. The use of FS spacer was beneficial in enhancing the initial flux as well as reducing the tendency of membrane fouling. © 2013 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.subjectCritical Concentrationen_US
dc.subjectCritical Fluxen_US
dc.subjectDirect Microscopic Observationen_US
dc.subjectForward Osmosisen_US
dc.subjectFouling Reversibilityen_US
dc.subjectMicroalgaeen_US
dc.titleDirect microscopic observation of forward osmosis membrane fouling by microalgae: Critical flux and the role of operational conditionsen_US
dc.typeArticleen_US
dc.identifier.emailTang, CY: tangc@hku.hken_US
dc.identifier.authorityTang, CY=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.memsci.2013.02.030en_US
dc.identifier.scopuseid_2-s2.0-84875355897en_US
dc.identifier.hkuros231349-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84875355897&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume436en_US
dc.identifier.spage174en_US
dc.identifier.epage185en_US
dc.identifier.isiWOS:000317388300017-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZou, S=36679461400en_US
dc.identifier.scopusauthoridWang, YN=35076853300en_US
dc.identifier.scopusauthoridWicaksana, F=6507042116en_US
dc.identifier.scopusauthoridAung, T=55630396800en_US
dc.identifier.scopusauthoridWong, PCY=15753031400en_US
dc.identifier.scopusauthoridFane, AG=35593963600en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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