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 Serejo, Mayara L.
A1 Muñoz Torre, Raúl
A1 Posadas Olmos, Esther
A1 Boncz, Marc A.
A1 Blanco, Saúl
A1 García Encina, Pedro Antonio
K1 Biogás
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 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.
PB American Chemical Society
YR 2015
FD 2015
LK http://uvadoc.uva.es/handle/10324/26908
UL http://uvadoc.uva.es/handle/10324/26908
LA eng
NO Environmental Science & Technology, 2015, 49(5), pag. 3228-3236
NO Producción Científica
DS UVaDOC
RD 25-nov-2024