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Article: The role of physical and chemical parameters on forward osmosis membrane fouling during algae separation

TitleThe role of physical and chemical parameters on forward osmosis membrane fouling during algae separation
Authors
KeywordsCritical Flux
Draw Solution Reverse Diffusion
Forward Osmosis
Fouling
Microalgae Separation
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2011, v. 366 n. 1-2, p. 356-362 How to Cite?
AbstractForward osmosis (FO) is an emerging membrane separation process, and it has recently been explored for microalgae separation, one of the key steps in algal biodiesel production. The current study systematically investigated the physical and chemical parameters affecting FO flux performance during microalgae separation. To the best of the authors' knowledge, this is the first study reporting FO fouling by microalgae as well as the effect of solute reverse diffusion on FO fouling. FO fouling was more severe at greater draw solution concentrations and in the active-layer-facing-the-draw-solution orientation, which can be partially attributed to the corresponding higher flux levels under these conditions. Indeed, a critical flux phenomenon was observed for the concentration driven FO process, where significant relative flux reduction occurred only when the water flux level exceeded some threshold value. The presence of Mg2+ in the feed water had detrimental effect on algal fouling, with more dramatic flux loss at greater Mg2+ concentration in the feed. Despite that MgCl2 had superior FO performance (higher water flux and lower solute reverse diffusion) when compared to NaCl as draw solution in the absence of foulants, the use of MgCl2 as a draw solution nonetheless promoted significant flux loss as a result of severe fouling when algae was present. This was likely caused by the reverse diffusion of Mg2+ from the draw solution into the feed water, which led to an unfavorable interaction between the divalent ion and the algal biomass in the feed water. Such reverse-diffusion-induced fouling should be explicitly considered for draw solution selection. © 2010 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185394
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.authorGu, Yen_US
dc.contributor.authorXiao, Den_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:11Z-
dc.date.available2013-07-30T07:32:11Z-
dc.date.issued2011en_US
dc.identifier.citationJournal Of Membrane Science, 2011, v. 366 n. 1-2, p. 356-362en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185394-
dc.description.abstractForward osmosis (FO) is an emerging membrane separation process, and it has recently been explored for microalgae separation, one of the key steps in algal biodiesel production. The current study systematically investigated the physical and chemical parameters affecting FO flux performance during microalgae separation. To the best of the authors' knowledge, this is the first study reporting FO fouling by microalgae as well as the effect of solute reverse diffusion on FO fouling. FO fouling was more severe at greater draw solution concentrations and in the active-layer-facing-the-draw-solution orientation, which can be partially attributed to the corresponding higher flux levels under these conditions. Indeed, a critical flux phenomenon was observed for the concentration driven FO process, where significant relative flux reduction occurred only when the water flux level exceeded some threshold value. The presence of Mg2+ in the feed water had detrimental effect on algal fouling, with more dramatic flux loss at greater Mg2+ concentration in the feed. Despite that MgCl2 had superior FO performance (higher water flux and lower solute reverse diffusion) when compared to NaCl as draw solution in the absence of foulants, the use of MgCl2 as a draw solution nonetheless promoted significant flux loss as a result of severe fouling when algae was present. This was likely caused by the reverse diffusion of Mg2+ from the draw solution into the feed water, which led to an unfavorable interaction between the divalent ion and the algal biomass in the feed water. Such reverse-diffusion-induced fouling should be explicitly considered for draw solution selection. © 2010 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 Fluxen_US
dc.subjectDraw Solution Reverse Diffusionen_US
dc.subjectForward Osmosisen_US
dc.subjectFoulingen_US
dc.subjectMicroalgae Separationen_US
dc.titleThe role of physical and chemical parameters on forward osmosis membrane fouling during algae separationen_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.2010.10.030en_US
dc.identifier.scopuseid_2-s2.0-78649446779en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78649446779&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume366en_US
dc.identifier.issue1-2en_US
dc.identifier.spage356en_US
dc.identifier.epage362en_US
dc.identifier.isiWOS:000285851600042-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZou, S=36679461400en_US
dc.identifier.scopusauthoridGu, Y=36678837600en_US
dc.identifier.scopusauthoridXiao, D=36679505700en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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