Upgrading end-of-line residues of the red seaweed Gelidium sesquipedale to polyhydroxyalkanoates using Halomonas boliviensis

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dc.contributor.authorTuna, Stepan
dc.contributor.authorIzaguirre, Jon
dc.contributor.authorBondar, Marina
dc.contributor.authorMarques, Mafalda
dc.contributor.authorFernandes, Pedro Carlos de Barros
dc.contributor.authorFonseca, Maria Manuela Regalo da
dc.contributor.authorCesário, Maria
dc.contributor.institutionFaculdade de Engenharia
dc.date.issued2020-09
dc.descriptionBiotechnology Reports
dc.description.abstractAgar extraction from Gelidium and Gracilaria red seaweed species produces hundred thousand ton of carbohydrate-rich residues annually. Gelidium sesquipedale waste biomass obtained after agar extraction, still contained 44.2 % w/w total carbohydrates (dry-weight basis). These residues were biologically up-graded to poly-3-hydroxybutyrate (P3HB) after saccharification of their carbohydrate fraction to simple sugars. A combined hydrolysis treatment using sulfamic acid followed by enzymatic hydrolysis with cellulases produced a glucose-rich hydrolysate with a negligible content of inhibitors. With this treatment a sugar yield of circa 30 % (g glucose/g biomass) was attained. The algal hydrolysates were assessed as carbon source for the production of P3HB by the halotolerant bacteria Halomonas boliviensis. A cell concentration of 8.3 g L−1 containing 41 % (w/w) of polymer and a yield (YP/S) of 0.16 gpolymer/gglucose were attained in shake flask assays. In this work, cellulose-rich seaweed waste was shown to be an upgradable, sustainable source of carbohydrates.en
dc.description.statusNon peer reviewed
dc.formatapplication/pdf
dc.identifier.citationTuna , S , Izaguirre , J , Bondar , M , Marques , M , Fernandes , P C D B , Fonseca , M M R D & Cesário , M 2020 , ' Upgrading end-of-line residues of the red seaweed Gelidium sesquipedale to polyhydroxyalkanoates using Halomonas boliviensis ' , Default journal .
dc.identifier.issn1646-3730
dc.language.isoeng
dc.publisherEdições Universitárias Lusófonas
dc.relation.ispartofDefault journal
dc.rightsopenAccess
dc.subjectBIOTECNOLOGIA
dc.subjectGELIDIUM SESQUIPEDALE
dc.subjectHALOMONAS BOLIVIENSIS
dc.subjectRESÍDUOS DE ALGAS MARINHAS
dc.subjectPOLI-3-HIDROXIBUTIRATO
dc.subjectRESÍDUOS DE MACROALGAS
dc.subjectENGENHARIA BIOTECNOLÓGICA
dc.subjectALGAS
dc.subjectBIOTECHNOLOGY
dc.subjectGELIDIUM SESQUIPEDALE
dc.subjectHALOMONAS BOLIVIENSIS
dc.subjectSEAWEED RESIDUES
dc.subjectPOLY-3-HYDROXYBUTYRATE
dc.subjectMACROALGAE RESIDUES
dc.subjectBIOTECHNOLOGY ENGINEERING
dc.subjectALGAE
dc.titleUpgrading end-of-line residues of the red seaweed Gelidium sesquipedale to polyhydroxyalkanoates using Halomonas boliviensisen
dc.typearticle

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