2024-03-28T08:40:42Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/300642021-06-24T07:34:29Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061
Long-term photosynthetic CO2 removal from biogas and flue-gas: Exploring the potential of closed photobioreactors for high-value biomass production
Toledo Cervantes, Alma
Morales, Tamara
González, Álvaro
Muñoz Torre, Raúl
Lebrero Fernández, Raquel
Producción Científica
The long-term performance of a tubular photobioreactor interconnected to a gas absorption column for the abatement of CO2 from biogas and flue-gas was investigated. Additionally, a novel nitrogen feast-famine regime was implemented during the flue-gas feeding stage in order to promote the continuous storage of highly-energetic compounds. Results showed effective CO2 (~98%) and H2S (~99%) removals from synthetic biogas, supported by the high photosynthetic activity of microalgae which resulted in an alkaline pH (~10). In addition, CO2 removals of 99 and 91% were observed during the flue-gas operation depending on the nutrients source: mineral salt medium and digestate, respectively. A biomass productivity of ~8 g m−2 d−1 was obtained during both stages, with a complete nitrogen and carbon recovery from the cultivation broth. Moreover, the strategy of feeding nutrients during the dark period promoted the continuous accumulation of carbohydrates, their concentration increasing from 22% under normal nutrition up to 37% during the feast-famine cycle. This represents a productivity of ~3 g-carbohydrates m−2 d−1, which can be further valorized to contribute to the economic sustainability of the photosynthetic CO2 removal process.
2018-06-08
2018-06-08
2018
info:eu-repo/semantics/article
Science of The Total Environment, Volumes 640–641, 2018, Pages 1272–1278
0048-9697
http://uvadoc.uva.es/handle/10324/30064
https://doi.org/10.1016/j.scitotenv.2018.05.270
eng
https://www.sciencedirect.com/science/article/pii/S0048969718319223
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 International
Elsevier