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dc.contributor.authorGallart-Sirvent, Pau
dc.contributor.authorYara Varón, Edinson
dc.contributor.authorVillorbina Noguera, Gemma
dc.contributor.authorBalcells Fluvià, Mercè
dc.contributor.authorSala i Martí, Núria
dc.contributor.authorCanela i Garayoa, Ramon
dc.date.accessioned2016-12-16T10:30:10Z
dc.date.issued2016
dc.identifier.issn1381-1177
dc.identifier.urihttp://hdl.handle.net/10459.1/58845
dc.description.abstractHere we studied non-edible fat waste as a starting material to prepare eutectic mixtures of biomaterials. Initially, the fat was hydrolyzed using water and R. oryzae resting cells. The hydrolysis was performed in organic solvent-free media and the degree of hydrolysis at 1 h was 42% while hydrolytic values of 86% and 98% were achieved at 12 and 48 h, respectively. To recover the resting cells, they were extracted in consecutive cycles with solvents or supercritical CO2. Compared with solvents, supercritical CO2 allowed the highest reuse. Hence, R. oryzae was used for 336 h (7 reaction cycles), yielding 56.5 g of free fatty acid/g biocatalyst. Crude glycerol was recovered, showing a purity of 66.0% and an ash and water content of 2.3% and 1.8%, respectively. The hydrolyzed fat was crystallized with several solvents to yield palmitic and stearic acid mixtures with melting point characteristics of eutectic mixtures. We recovered 76% to 90% of the palmitic and stearic acids present in the initial hydrolyzed animal fat, depending on the solvent. The palmitic:stearic acid ratios determined by GC-FID were similar to those reported for eutectic mixtures whit phase change materials properties, as were the melting points, which ranged from 51.5 °C to 54.8 °C.ca_ES
dc.description.sponsorshipThis work was supported in part by the contract grant number: CTQ2015-70982-C3-1-R (MINECO/FEDER), the contract grant number: VALTEC13-1-0078 (ACCIÓ/Generalitat de Catalunya) and by a Grant-in-Aid from the Departament d'Universitats, Recerca i Societat de la Informació of the Generalitat de Catalunya (2014 SGR 1296 Agricultural Biotechnology Research Group).ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relationMINECO/PN2013-2016/CTQ2015-70982-C3-1-R
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1016/j.molcatb.2016.11.015ca_ES
dc.relation.ispartofJournal of Molecular Catalysis B: Enzymatic, 2016, vol. 134, p. 172-177ca_ES
dc.rights(c) Elsevier B.V., 2016ca_ES
dc.subjectSupercritical CO2ca_ES
dc.subjectBiocatalysisca_ES
dc.subjectGlycerol recoveryca_ES
dc.subjectBio-based materialsca_ES
dc.titleRecycling Rhizopus oryzae resting cells as biocatalyst to prepare near eutectic palmitic-stearic acid mixtures from non-edible fatca_ES
dc.typearticleca_ES
dc.identifier.idgrec024903
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.molcatb.2016.11.015
dc.date.embargoEndDate10000-01-01


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