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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/73299

    Título
    Brewery spent grain valorization through fermentation: Targeting biohydrogen, carboxylic acids and methane production
    Autor
    Pérez Barragán, Jacobo
    Martínez Fraile, Cristina
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Quijano Govantes, GuillermoAutoridad UVA Orcid
    Maya Yescas, Rafael
    León Becerril, Elizabeth
    Castro Muñoz, Roberto
    García Depraect, OctavioAutoridad UVA Orcid
    Año del Documento
    2024
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Process Safety and Environmental Protection, noviembre 2024, vol. 191(A), p. 206-217
    Zusammenfassung
    This study investigated three different fermentation approaches to explore the potential for producing biohydrogen, carboxylic acids, and methane from hydrolysates of thermally dilute acid pretreated brewer's spent grains (BSG). Initially, the research focused on maximizing the volumetric hydrogen production rate (HPR) in the continuous dark fermentation (DF) of BSG hydrolysates by varying the hydraulic retention time (HRT). The highest HPR reported to date of 5.9 NL/L-d was achieved at 6 h HRT, with a Clostridium-dominated microbial community. The effect of the operational pH (4, 5, 6, and 7) on the continuous acidogenic fermentation was then investigated. A peak carboxylic acid concentration of 17.3 g CODequiv./L was recorded at pH 6, with an associated volumetric productivity of 900.5 ± 13.1 mg CODequiv./L-h and a degree of acidification of 68.3 %. Lactic acid bacteria such as Limosilactobacillus and Lactobacillus were dominant at pH 4–5, while Weissella, Enterococcus, and Lachnoclostridium appeared at pH 6 and 7. Finally, this study evaluated the biochemical methane potential of the DF broth and the unfermented hydrolysates and found high methane yields of 659 and 517 NmL CH4/g-VSadded, respectively, both within one week. Overall, the results showed that pretreated BSG can be a low-cost feedstock for the production of bioenergy and valuable bio-based chemicals in a circular economy.
    Materias Unesco
    3322.05 Fuentes no Convencionales de Energía
    Palabras Clave
    Acidogenic fermentation
    Biogas
    Dark fermentation
    Organic acids
    Lignocellulosic waste
    ISSN
    0957-5820
    Revisión por pares
    SI
    DOI
    10.1016/j.psep.2024.08.071
    Patrocinador
    Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCYT) (Project-CF-2023-G648)
    Ministerio de Ciencia e Innovación (RYC2021–034559-I)
    Junta de Castilla y León/FEDER (CL-EI-2021–07, UIC 315)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0957582024010449
    Propietario de los Derechos
    © 2024 The Author(s)
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/73299
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP48 - Artículos de revista [265]
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    brewery-spent-grain-valorization-through-fermentation.pdf
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