RT info:eu-repo/semantics/article T1 Influence of Biogas Flow Rate on Biomass Composition During the Optimization of Biogas Upgrading in Microalgal-Bacterial Processes A1 Leite Serejo, Mayara A1 Posadas, Esther A1 Árpád Boncz, Marc A1 Blanco Lanza, Saúl A1 Garía Encina, Pedro A1 Muñoz, Raúl A2 Ecologia K1 Biología K1 Ecología. Medio ambiente K1 Biogás K1 Biomasa K1 Bacterias K1 Algas AB 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 consideredoptimum 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 PB American Chemical Society YR 2017 FD 2017-11-28 LK http://hdl.handle.net/10612/6993 UL http://hdl.handle.net/10612/6993 NO Environmental Science & Technology, 2015, Mar 3;49(5) NO P. 3228-3236 DS BULERIA. Repositorio Institucional de la Universidad de León RD 28-mar-2024