Mesophilic and thermophilic acidogenic fermentation of process water from food waste hydrothermal carbonization
The process water from hydrothermal carbonization of food waste (180 ◦ C, 1 h), characterized by a high organic matter content, represents a suitable substrate for acidogenic fermentation which was optimized by evaluating four inocula, under mesophilic and thermophilic batch conditions. The highest...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/749980 |
| Acceso en línea: | https://hdl.handle.net/10486/749980 https://dx.doi.org/10.1016/j.ijhydene.2026.153494 |
| Access Level: | acceso abierto |
| Palabra clave: | CSTR Dark fermentation Hydrogen Hydrothermal carbonization Inoculum selection Microbial taxonomy Química |
| Sumario: | The process water from hydrothermal carbonization of food waste (180 ◦ C, 1 h), characterized by a high organic matter content, represents a suitable substrate for acidogenic fermentation which was optimized by evaluating four inocula, under mesophilic and thermophilic batch conditions. The highest hydrogen yield (44.4 mL H g COD 2 / ) was achieved with a thermophilically adapted mixed sludge at pH 5.5, where Prevotellaceae, Bacteroidaceae, Lachnospiraceae and Coprothermobacteracea were dominant. This inoculum was used under thermophilic continuous operation, where pH (4.8 and 5.5), hydraulic retention time (HRT; 3.5 and 5.0 d) and organic loading rate (OLR; 2.5, 5.0 and 7.5 g COD 5 d, and OLR 5 g COD /L⋅d) were evaluated. Optimal performance was achieved at pH 5.5, HRT /L⋅d, reaching ~57 mL H 2 /g COD and ~7800 mg/L of volatile fatty acids. This operating condition selectively enriched hydrogen-producing bacteria (Thermoanaerobacterales III, Clostridiaceae) promoting lactate-driven metabolic routes conducted by Lactobacillaceae, thereby emphasizing the functional microbial consortia underlying process performance |
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