RT info:eu-repo/semantics/article
T1 Innovative operational strategies in photosynthetic biogas upgrading in an outdoors pilot scale algal-bacterial photobioreactor
A1 Marín de Jesús, David Fernando
A1 Carmona Martínez, Alessandro A.
A1 Blanco, Saúl
A1 Lebrero Fernández, Raquel
A1 Muñoz Torre, Raúl
K1 Algal-bacterial photobioreactor
K1 Fotobiorreactor bacteriano de algas
K1 Biogas upgrading
K1 Mejora de biogás
K1 23 Química
K1 33 Ciencias Tecnológicas
AB Three innovative operational strategies were successfully evaluated to improve the quality of biomethane in an outdoors pilot scale photobioreactor interconnected to an external absorption unit: i) the use of a greenhouse during winter conditions, ii) a direct CO2 stripping in the photobioreactor via air stripping during winter conditions and iii) the use of digestate as make-up water during summer conditions. CO2 concentrations in the biomethane ranged from 0.4% to 6.1% using the greenhouse, from 0.3% to 2.6% when air was injected in the photobioreactor and from 0.4% to 0.9% using digestate as make up water. H2S was completely removed under all strategies tested. On the other hand, CH4 concentrations in biomethane ranged from 89.5% to 98.2%, from 93.0% to 98.2% and from 96.3% to 97.9%, when implementing strategies i), ii) and iii), respectively. The greenhouse was capable of maintaining microalgae productivities of 7.5 g m−2 d−1 during continental weather conditions, while mechanical CO2 stripping increased the pH in order to support an effective CO2 and H2S removal. Finally, the high evaporation rates during summer conditions allowed maintaining high inorganic carbon concentrations in the cultivation broth using centrate, which provided a cost-effective biogas upgrading.
PB Elsevier
SN 0045-6535
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/46874
UL https://uvadoc.uva.es/handle/10324/46874
LA eng
NO Chemosphere, 2021, vol. 264, Part 1, p. 128470
NO Producción Científica
DS UVaDOC
RD 20-abr-2024