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Título: | Effect of metals on mesophilic anaerobic digestion of strawberry extrudate in batch mode |
Autor: | Cubero-Cardoso, Juan CSIC ORCID ; Maluf Braga, Adriana Ferreira; Trujillo-Reyes, Ángeles CSIC ORCID ; Alonso-Segovia, Gabriel; Serrano Moral, Antonio CSIC ORCID ; Borja Padilla, Rafael CSIC ORCID ; Fermoso, Fernando G. CSIC ORCID | Palabras clave: | Central composite design Fractional factorial design Methane production Waste valorisation |
Fecha de publicación: | 15-ene-2023 | Editor: | Elsevier | Citación: | Journal of Environmental Management 326, Part B: 116783 (2023) | Resumen: | According to recent studies, the anaerobic digestion of strawberry extrudate is a promising option with potential in the berry industry biorefinery. However, the lack and/or unbalance of concentrations of metals in some agro-industrial residues could hamper methane production during the anaerobic digestion of these kinds of wastes. In this study, a fractional factorial design was applied to screen the supplementation requirements regarding six metals (Co, Ni, Fe, Cu, Mn, and Zn) for methane production from strawberry extrudate (SE). The logistic model was used to fit the experimental data of methane production-time. It allowed identifying two different stages in the anaerobic process and obtaining the kinetic parameters for each step. Maximum methane production obtained in the first (Bmax) kinetic stage, the methane production in the second stage (P), and the maximum methane production rates (Rmax) concluded a statistically significant effect for Ni and Zn. The second set of experiments was carried out with Ni and Zn through a central composite design to study the concentration effect in the anaerobic digestion process of the strawberry extrudate. The parameters P and Rmax demonstrated a positive interaction between Ni and Zn. Although, Bmax did not prove a statistically significant effect between Ni and Zn. | Descripción: | 10 Páginas.-- 4 Figuras.-- 4 Tablas | Versión del editor: | http://dx.doi.org/10.1016/j.jenvman.2022.116783 | URI: | http://hdl.handle.net/10261/286762 | DOI: | 10.1016/j.jenvman.2022.116783 | ISSN: | 0301-4797 |
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