2026-04-28T19:16:53Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/269082025-02-20T07:10:43Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061

Serejo, Mayara L. Muñoz Torre, Raúl Posadas Olmos, Esther Boncz, Marc A. Blanco, Saúl García Encina, Pedro Antonio 2017-11-06T13:47:28Z 2017-11-06T13:47:28Z 2015 Environmental Science & Technology, 2015, 49(5), pag. 3228-3236 http://uvadoc.uva.es/handle/10324/26908 10.1021/es5056116 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 ± 1 g m–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. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International Influence of biogas flow rate on biomass composition during the optimization of biogas upgrading in microalgal-bacterial processes info:eu-repo/semantics/article