2024-03-28T12:24:25Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/235312021-06-24T07:34:31Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061
00925njm 22002777a 4500
dc
Posadas Olmos, Esther
author
Marín, David
author
Blanco, Saúl
author
Lebrero Fernández, Raquel
author
Muñoz Torre, Raúl
author
2017
The bioconversion of biogas to biomethane coupled to centrate treatment was evaluated in an outdoors pilot scale high rate algal pond interconnected to an external CO2-H2S absorption column (AC) via settled broth recirculation. CO2-removal efficiencies ranged from 50 to 95% depending on the alkalinity of the cultivation broth and environmental conditions, while a complete H2S removal was achieved regardless of the operational conditions. A maximum CH4 concentration of 94% with a limited O2 and N2 stripping was recorded in the upgraded biogas at recycling liquid/biogas ratios in the AC of 1 and 2. Process operation at a constant biomass productivity of 15 g m−2 d−1 and the minimization of effluent generation supported high carbon and nutrient recoveries in the harvested biomass (C = 66 ± 8%, N = 54 ± 18%, P ≈ 100% and S = 16 ± 3%). Finally, a low diversity in the structure of the microalgae population was promoted by the environmental and operational conditions imposed.
Bioresource Technology , 2017, Volume 232, Pages 133–141
http://uvadoc.uva.es/handle/10324/23531
https://doi.org/10.1016/j.biortech.2017.01.071
Simultaneous biogas upgrading and centrate treatment in an outdoors pilot scale high rate algal pond