Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction

Discarded red beetroot (DRB) is an organic waste generated in the food industry. This study is focused on the valorization of DRB through the recovery of bioactive compounds. The characterization of the DRB juice confirmed a higher content of antioxidants (DPPH 504 ± 24 µmol TE/L, FRAP 10920 ± 440 µ...

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Detalles Bibliográficos
Autores: Amo Mateos, Esther Del, Fernández Delgado, Marina, Lucas Yagüe, Susana, García Cubero, María Teresa, Coca Sanz, Mónica
Tipo de recurso: conjunto de datos
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Valladolid
Repositorio:UVaDOC. Repositorio Documental de la Universidad de Valladolid
OAI Identifier:oai:uvadoc.uva.es:10324/70813
Acceso en línea:https://doi.org/10.71569/bcmk-v984
https://uvadoc.uva.es/handle/10324/70813
Access Level:acceso abierto
Palabra clave:Microwave-assisted extraction, Galacturonic acid, Pectooligosaccharides, Polyethylene glycol, Antioxidants, Betalains
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spelling Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extractionAmo Mateos, Esther DelFernández Delgado, MarinaLucas Yagüe, SusanaGarcía Cubero, María TeresaCoca Sanz, MónicaMicrowave-assisted extraction, Galacturonic acid, Pectooligosaccharides, Polyethylene glycol, Antioxidants, BetalainsDiscarded red beetroot (DRB) is an organic waste generated in the food industry. This study is focused on the valorization of DRB through the recovery of bioactive compounds. The characterization of the DRB juice confirmed a higher content of antioxidants (DPPH 504 ± 24 µmol TE/L, FRAP 10920 ± 440 µmol TE/L, ABTS 22012 ± 592 µmol TE/L), phenolic compounds (1789 ± 56 mg GAE/L), flavonoids (471± 17 mg CE/L) and betalains (1426 ± 24 mg/L) than commercial juices. DRB pomace contains pectin that was recovered by microwave extraction aided by a surfactant (polyethylene glycol, PEG4000). Conditions (temperature, time and surfactant concentration) for the extraction of galacturonic acid (GalA) or pectooligosaccharides (POS) were optimized by a central composite experimental design. POS were extracted at high temperatures (160 °C, 5.3 min, 8.4 g PEG4000/L, yield of 271.2 g POS/kg dry pomace). In comparison, galacturonic acid extraction was favored at moderate conditions (137 °C, 5 min, 2.5 g PEG4000/L, yield of 120.1 g GalA/kg dry pomace). The characterization of the freeze-dried hydrolysates revealed that the solid obtained under moderate temperature conditions (137 ºC) showed a higher GalA content (49.5%) and lower neutral sugars (11.4%), as GalA degrades at lower temperatures than pentoses. The recovered pectin can be considered high-methoxyl pectin, as the degree of esterification was higher than 50%. FTIR spectra of the freeze-dried hydrolysates showed functional groups consistent with pectin. MALDI-TOF-MS analysis revealed the presence of oligosaccharides of hexoses and pentoses with different structures and degrees of polymerization. Thus, DRB, a low-value vegetable waste, can be converted into high-value-added bioproducts in a biorefinery framework.Instituto de Procesos SosteniblesSpanish Ministry of Science, Innovation and Universities (PID2020-115110RB-I00/AEI/10.13039/501100011033)Universidad de Valladolid, Instituto de Procesos Sostenibles2023info:eu-repo/semantics/datasetinfo:eu-repo/semantics/publishedVersiontext/csvhttps://doi.org/10.71569/bcmk-v984https://uvadoc.uva.es/handle/10324/70813reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolidinstname:Universidad de ValladolidInglésEstrategias para la valorización efectiva de residuos hortofrutícolas: producción de compuestos bioactivos y biocombustibles avanzados. VALORFRUIT (2021-2024)info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:uvadoc.uva.es:10324/708132026-06-13T12:44:47Z
dc.title.none.fl_str_mv Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
title Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
spellingShingle Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
Amo Mateos, Esther Del
Microwave-assisted extraction, Galacturonic acid, Pectooligosaccharides, Polyethylene glycol, Antioxidants, Betalains
title_short Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
title_full Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
title_fullStr Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
title_full_unstemmed Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
title_sort Valorization of discarded red beetroot through the recovery of bioactive compounds and the production of pectin by surfactant-assisted microwave extraction
dc.creator.none.fl_str_mv Amo Mateos, Esther Del
Fernández Delgado, Marina
Lucas Yagüe, Susana
García Cubero, María Teresa
Coca Sanz, Mónica
author Amo Mateos, Esther Del
author_facet Amo Mateos, Esther Del
Fernández Delgado, Marina
Lucas Yagüe, Susana
García Cubero, María Teresa
Coca Sanz, Mónica
author_role author
author2 Fernández Delgado, Marina
Lucas Yagüe, Susana
García Cubero, María Teresa
Coca Sanz, Mónica
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Valladolid, Instituto de Procesos Sostenibles
dc.subject.none.fl_str_mv Microwave-assisted extraction, Galacturonic acid, Pectooligosaccharides, Polyethylene glycol, Antioxidants, Betalains
topic Microwave-assisted extraction, Galacturonic acid, Pectooligosaccharides, Polyethylene glycol, Antioxidants, Betalains
description Discarded red beetroot (DRB) is an organic waste generated in the food industry. This study is focused on the valorization of DRB through the recovery of bioactive compounds. The characterization of the DRB juice confirmed a higher content of antioxidants (DPPH 504 ± 24 µmol TE/L, FRAP 10920 ± 440 µmol TE/L, ABTS 22012 ± 592 µmol TE/L), phenolic compounds (1789 ± 56 mg GAE/L), flavonoids (471± 17 mg CE/L) and betalains (1426 ± 24 mg/L) than commercial juices. DRB pomace contains pectin that was recovered by microwave extraction aided by a surfactant (polyethylene glycol, PEG4000). Conditions (temperature, time and surfactant concentration) for the extraction of galacturonic acid (GalA) or pectooligosaccharides (POS) were optimized by a central composite experimental design. POS were extracted at high temperatures (160 °C, 5.3 min, 8.4 g PEG4000/L, yield of 271.2 g POS/kg dry pomace). In comparison, galacturonic acid extraction was favored at moderate conditions (137 °C, 5 min, 2.5 g PEG4000/L, yield of 120.1 g GalA/kg dry pomace). The characterization of the freeze-dried hydrolysates revealed that the solid obtained under moderate temperature conditions (137 ºC) showed a higher GalA content (49.5%) and lower neutral sugars (11.4%), as GalA degrades at lower temperatures than pentoses. The recovered pectin can be considered high-methoxyl pectin, as the degree of esterification was higher than 50%. FTIR spectra of the freeze-dried hydrolysates showed functional groups consistent with pectin. MALDI-TOF-MS analysis revealed the presence of oligosaccharides of hexoses and pentoses with different structures and degrees of polymerization. Thus, DRB, a low-value vegetable waste, can be converted into high-value-added bioproducts in a biorefinery framework.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/dataset
info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.71569/bcmk-v984
https://uvadoc.uva.es/handle/10324/70813
url https://doi.org/10.71569/bcmk-v984
https://uvadoc.uva.es/handle/10324/70813
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Estrategias para la valorización efectiva de residuos hortofrutícolas: producción de compuestos bioactivos y biocombustibles avanzados. VALORFRUIT (2021-2024)
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.none.fl_str_mv text/csv
dc.source.none.fl_str_mv reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolid
instname:Universidad de Valladolid
instname_str Universidad de Valladolid
reponame_str UVaDOC. Repositorio Documental de la Universidad de Valladolid
collection UVaDOC. Repositorio Documental de la Universidad de Valladolid
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