DSpace Repository

Brewer’s spent grain biotransformation to produce lignocellulolytic enzymes and polyhydroxyalkanoates in a two-stage valorization scheme

Show simple item record

dc.contributor Universitat de Vic - Universitat Central de Catalunya. CT BETA
dc.contributor.author Llimós Turet, Jordi
dc.contributor.author Martínez-Avila, Oscar
dc.contributor.author Marti Serrano, Elisabet
dc.contributor.author Corchado-Lopo, Carlos
dc.contributor.author Llenas, Laia
dc.contributor.author Ponsá Salas, Sergio
dc.contributor.author Gea, Teresa
dc.date.accessioned 2021-02-17T15:01:05Z
dc.date.available 2021-02-17T15:01:05Z
dc.date.created 2020
dc.date.issued 2020
dc.identifier.issn 2190-6815
dc.identifier.uri http://hdl.handle.net/10854/6547
dc.description Llimos, J., Martinez-Avila, O., Marti, E., Corchado-Lopo, C., Llenas, L., Gea, T., Ponsa S. (2020). Brewer's spent grain biotransformation to produce lignocellulolytic enzymes and polyhydroxyalkanoates in a two-stage valorization scheme . Biomass Conversion and Biorefinery , ( ), 0-0. doi: 10.1007/s13399-020-00918-4. es
dc.description.abstract Lignocellulolytic enzymes from low-cost sources are gaining attention as a tool to reduce production costs. Such enzymes can be obtained sustainably by diverse fungal strains via solid-state fermentation (SSF) of lignocellulosic-derived residues as substrates. Besides, these enzymes allow hydrolyzing the same residue, releasing fermentable sugars that can be transformed into value-added products. This study shows a two-stage valorization approach for the lignocellulosic leftover brewer’s spent grain (BSG): first, by producing lignocellulolytic enzymes through the SSF of BSG using three fungal strains and, second, by using the self-produced enzymes to hydrolyze the same BSG and obtaining sugar-rich hydrolysates that serve as an alternative carbon source for polyhydroxyalkanoates (PHA) production. From the evaluated set, Aspergillus niger and Thermoascus aurantiacus produced the highest xylanase activities compared with Trichoderma reesei (268 ± 24, 241 ± 10, and 150 ± 24 U per gram of dry BSG, respectively). Also, A. niger extracts resulted in the most effective for releasing sugars from BSG, obtaining up to 0.56 g per gram of dry BSG after 24 h without any pretreatment needed. Thus, the sugar-rich hydrolysate obtained with A. niger was used as a source for producing PHA by using two bacterial strains, namely, Burkholderia cepacia and Cupriavidus necator. Maximum PHA yield was achieved by using C. necator after 48 h with 9.0 ± 0.44 mg PHA·g−1 dry BSG. These results show the significant potential of BSG as raw material for obtaining value-added bioproducts and the importance of multiple valorization schemes to improve the feasibility of similar residue-based systems. es
dc.format application/pdf es
dc.format.extent 12 p. es
dc.language.iso eng es
dc.publisher Springer es
dc.rights Aquest document està subjecte a aquesta llicència Creative Commons es
dc.rights.uri https://creativecommons.org/licenses/by/4.0/deed.ca es
dc.subject.other Cereals es
dc.subject.other Enzims es
dc.title Brewer’s spent grain biotransformation to produce lignocellulolytic enzymes and polyhydroxyalkanoates in a two-stage valorization scheme es
dc.type info:eu-repo/semantics/article es
dc.identifier.doi https://doi.org/10.1007/s13399-020-00918-4
dc.rights.accesRights info:eu-repo/semantics/embargoedAccess
dc.type.version info:eu-repo/publishedVersion es
dc.indexacio Indexat a WOS/JCR es
dc.indexacio Indexat a SCOPUS es

Files in this item

Show simple item record

Aquest document està subjecte a aquesta llicència Creative Commons Except where otherwise noted, this item's license is described as Aquest document està subjecte a aquesta llicència Creative Commons

Search RIUVic


Browse

Statistics