Levan production by Zymomonas mobilis in batch and continuous fermentation systems

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dc.contributor.authorSilbir, Selim
dc.contributor.authorDagbagli, Seval
dc.contributor.authorYegin, Sirma
dc.contributor.authorBaysal, Taner
dc.contributor.authorGoksungur, Yekta
dc.date.accessioned2019-10-27T22:05:27Z
dc.date.available2019-10-27T22:05:27Z
dc.date.issued2014
dc.departmentEge Üniversitesien_US
dc.description.abstractLevan production in batch and continuous fermentation systems by Zymomonas mobilis B-14023 was investigated. The culture medium used in both of the fermentation systems contained sucrose and various organic nitrogen sources. Maximum concentration of levan was produced with yeast extract among the nitrogen sources tested. Response surface methodology was used to investigate the effects of three factors on the concentration of levan in batch cultures of Z. mobilis. Maximum levan concentration was 40.2 g/L and this concentration was reached at the optimum levels of process variables, which were 299.1 g/L initial substrate concentration, 42.3 h incubation time, and initial pH 6.0. Continuous fermentation experiments were done in packed bed bioreactor using Ca-alginate immobilized Z. mobilis cells. The highest levan concentration (31.8 +/- 0.21 g/L) was obtained at a dilution rate of 0.14 h(-1) while maximum volumetric productivity (6.556 g/(Lh)) was obtained at a dilution rate of 0.22 h(-1). Increasing the dilution rate resulted in decreased levan and increased residual sugar concentrations. (C) 2013 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipTUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TOVAG 110 O 079]en_US
dc.description.sponsorshipThis research was supported by TUBITAK TOVAG 110 O 079. We also thank Mrs. Huriye Goksungur for editing the manuscript.en_US
dc.identifier.doi10.1016/j.carbpol.2013.08.031en_US
dc.identifier.endpage461en_US
dc.identifier.issn0144-8617
dc.identifier.issn1879-1344
dc.identifier.pmid24274530en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage454en_US
dc.identifier.urihttps://doi.org/10.1016/j.carbpol.2013.08.031
dc.identifier.urihttps://hdl.handle.net/11454/48434
dc.identifier.volume99en_US
dc.identifier.wosWOS:000329256600058en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCarbohydrate Polymersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLevanen_US
dc.subjectPolysaccharideen_US
dc.subjectCalcium alginateen_US
dc.subjectImmobilizationen_US
dc.subjectZ. mobilisen_US
dc.subjectResponse surface methodologyen_US
dc.titleLevan production by Zymomonas mobilis in batch and continuous fermentation systemsen_US
dc.typeArticleen_US

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