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Título
Biotic and abiotic insights into the storage of food waste and its effect on biohydrogen and methane production potential
Autor
Año del Documento
2023
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Journal of Water Process Engineering, 2023, vol. 53, 103840
Abstract
The present study investigated the physicochemical and microbiological changes occurring during the storage of simulated restaurant food waste (FW) and how such changes affected its biohydrogen and biogas production potential. FW was stored for 72 h in a closed atmosphere under two different scenarios: i) without and ii) with inoculation of a mixed microbial culture harboring lactic acid bacteria (LAB). Both storage scenarios resulted in similar biotic and abiotic changes in FW. Particularly, FW was pre-acidified and pre-hydrolyzed to some extent during the storage, resulting in a feedstock enriched in LAB (≈ 95 % total relative abundance) and lactate (10.5–12.3 g/L, 87.0–90.5 % selectivity). Biochemical hydrogen potential tests revealed that the use of stored FW resulted in similar or even higher hydrogen production efficiencies compared to that of non-stored FW, achieving up to 60 NmL H2/g VS added and a maximum volumetric hydrogen production rate of 9.7 NL H2/L-d. Metabolically, the conversion of lactate into hydrogen was crucial regardless of the use of non-stored or stored FW, albeit the presence of fermentable carbohydrates in the substrate was also essential either to produce lactate or to co-produce extra hydrogen. On the contrary, biochemical methane potential tests showed that the biogas production potential of FW was not affected by storage, yielding on average 400 NmL CH4/g VS added and revealing that lactate oxidation to methane precursors represented an important step in FW biomethanization.
Materias (normalizadas)
Microbiology
Biochemistry
Materias Unesco
3303.03 Procesos Químicos
2414 Microbiología
Palabras Clave
Biogas
Hydrogen
Lactate
Storage
Biogás
Hidrógeno
Lactato
Almacenamiento
ISSN
2214-7144
Revisión por pares
SI
Patrocinador
European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 894515
Ministerio de Ciencia e Innovación - AEI and European Union NextGenerationEU/PRTR (RYC2021-034559-I)
Junta de Castilla y León and the European FEDER Programme (CLU 2017-09, CL-EI-2021-07 y UIC 315)
Ministerio de Ciencia e Innovación - AEI and European Union NextGenerationEU/PRTR (RYC2021-034559-I)
Junta de Castilla y León and the European FEDER Programme (CLU 2017-09, CL-EI-2021-07 y UIC 315)
Patrocinador
info:eu-repo/grantAgreement/EC/H2020/894515
Propietario de los Derechos
© 2023 The Authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Collections
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