2026-05-05T09:19:02Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/235472025-03-26T19:10:03Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061

Influence of the gas-liquid flow configuration in the absorption column on photosynthetic biogas upgrading in algal-bacterial photobioreactors Toledo Cervantes, Alma Madrid Chirinos, Cindy Cantera Ruiz De Pellon, Sara Lebrero Fernández, Raquel Muñoz Torre, Raúl The potential of an algal-bacterial system consisting of a high rate algal pond (HRAP) interconnected to an absorption column (AC) via recirculation of the cultivation broth for the upgrading of biogas and digestate was investigated. The influence of the gas-liquid flow configuration in the AC on the photosynthetic biogas upgrading process was assessed. AC operation in a co-current configuration enabled to maintain a biomass productivity of 15 g m−2 d−1, while during counter-current operation biomass productivity decreased to 8.7 ± 0.5 g m−2 d−1 as a result of trace metal limitation. A bio-methane composition complying with most international regulatory limits for injection into natural gas grids was obtained regardless of the gas-liquid flow configuration. Furthermore, the influence of the recycling liquid to biogas flowrate (L/G) ratio on bio-methane quality was assessed under both operational configurations obtaining the best composition at an L/G ratio of 0.5 and co-current flow operation. 2017-06-19T14:15:49Z 2017-06-19T14:15:49Z 2017-06-19T14:15:49Z 2017 info:eu-repo/semantics/article Bioresource Technology, 2017, Volume 225, Pages 336–342 http://uvadoc.uva.es/handle/10324/23547 10.1016/j.biortech.2016.11.087 eng http://www.sciencedirect.com/science/article/pii/S096085241631608X info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International Elsevier