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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/73302

    Título
    Continuous two-stage lactate-driven dark fermentation process for enhanced biohydrogen production from food waste
    Autor
    Regueira Marcos, Lois
    García Depraect, OctavioAutoridad UVA Orcid
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Año del Documento
    2024
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Journal of Water Process Engineering, noviembre 2024, vol. 67, 106116
    Resumo
    The performance of a continuous lactate-driven dark fermentation (LD-DF) process based on the physical separation of lactate and hydrogen production was evaluated using simulated food waste (FW) as substrate. The optimum pH to maximize lactate production in the lactic reactor (LR) and the optimum hydraulic retention time (HRT) to maximize H2 production in the hydrogen production reactor (HR) were investigated. The lack of pH control in the LR implied a decrease in pH to values as low as 3.7, with the maximum lactate titer reached at a controlled pH of 4.5. The controlled reduction of the HRT from 12 to 4 h strongly affected the volumetric hydrogen production rate (HPR) in the HR. The stepwise reduction of HRT to 6 h resulted in the maximum recorded HPR of 9.6 ± 0.9 L H2/L-d, whereas a reduction to 4 h mediated a process collapse. The total consumption of lactate over carbohydrates in the HR suggested the occurrence of the LD-DF process at this stage. Principal component analysis (PCA) revealed a positive correlation between HPR and butyrate concentration in the HR. Additionally, HPR was negatively correlated with elevated levels of acetate and lactate in the HR broth. Overall, the application of a continuous two-stage LD-DF process allowed a significant reduction in HRT while maintaining high HPRs from FW.
    Palabras Clave
    Acidogenic fermentation
    Dark fermentation
    Hydraulic retention time
    Lactate production
    Organic waste
    Volatile fatty acids
    ISSN
    2214-7144
    Revisión por pares
    SI
    DOI
    10.1016/j.jwpe.2024.106116
    Patrocinador
    Ministerio de Ciencia e Innovación (PID2022-139110OA-I00, RYC2021-034559-I)
    Junta de Castilla y León/FEDER (CL-EI-2021-07, UIC 315)
    Junta de Castilla y León-Consejería de Educación (PR-2020)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S2214714424013485
    Propietario de los Derechos
    © 2024 The Author(s)
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/73302
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
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    Universidad de Valladolid

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