Influence of Biogas Flow Rate on Biomass Composition During the Optimization of Biogas Upgrading in Microalgal-Bacterial Processes
| Autor: | Leite Serejo, Mayara, Posadas, Esther, Árpád Boncz, Marc, Blanco Lanza, Saúl, Garía Encina, Pedro, Muñoz, Raúl |
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| Přispěvatelé: | Ecologia, Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad de la Universidad de Léon |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | BULERIA. Repositorio Institucional de la Universidad de León instname |
| Popis: | P. 3228-3236 The influence of biogas flow rate (0, 0.3, 0.6, and 1.2 m3 m−2 h−1) on the elemental and macromolecular composition of the algal-bacterial biomass produced from biogas upgrading in a 180 L photobioreactor interconnected to a 2.5 L external bubbled absorption column was investigated using diluted anaerobically digested vinasse as cultivation medium. The influence of the external liquid recirculation/biogas ratio (0.5 < L/G < 67) on the removal of CO2 and H2S, and on the concentrations of O2 and N2 in the upgraded biogas, was also evaluated. A L/G ratio of 10 was considered optimum to support CO2 and H2S removals of 80% and 100%, respectively, at all biogas flow rates tested. Biomass productivity increased at increasing biogas flow rate, with a maximum of 12 ± 1gm−2 d−1 at 1.2 m3 m−2 h−1, while the C, N, and P biomass content remained constant at 49 ± 2%, 9 ± 0%, and 1 ± 0%, respectively, over the 175 days of experimentation. The high carbohydrate contents (60−76%), inversely correlated to biogas flow rates, would allow the production of ≈100 L of ethanol per 1000 m3 of biogas upgraded under a biorefinery process approach SI |
| Databáze: | OpenAIRE |
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