RT info:eu-repo/semantics/article
T1 Photoautotrophic removal of hydrogen sulfide from biogas using purple and green sulfur bacteria
A1 Struk, Martin
A1 Sepúlveda Muñoz, Cristian Andrés
A1 Kushkevych, Ivan
A1 Muñoz Torre, Raúl
K1 Desulfurization
K1 Desulfuración
K1 Hydrogen sulfide
K1 Ácido sulfhídrico
K1 Methane
K1 Metano
K1 Photosynthetic bacteria
K1 Bacterias fotosintéticas
AB Biogas desulfurization based on anoxygenic photosynthetic processes represents an alternative to physicochemical technologies, decreasing the risk of O2 and N2 contamination. This work aimed at assessing the potential of Allochromatium vinosum and Chlorobium limicola for biogas desulfurization under different light intensities (10 and 25 klx) and H2S concentrations (1, 1.5 and 2%) in batch photobioreactors. In addition, the influence of rising biogas flow rates (2.9, 5.8 and 11.5 L d-1 in stage I, II and III, respectively) on the desulfurization performance in a 2.3 L photobioreactor utilizing C. limicola under continuous mode was assessed. The light intensity of 25 klx negatively influenced the growth of A. vinosum and C. limicola, resulting in decreased H2S removal capacity. An increase in H2S concentrations resulted in higher volumetric H2S removal rates in C. limicola (2.9–5.3 mg L-1 d-1) tests compared to A. vinosum (2.4–4.6 mg L-1 d-1) tests. The continuous photobioreactor completely removed H2S from biogas in stage I and II. The highest flow rate in stage III induced a deterioration in the desulfurization activity of C. limicola. Overall, the high H2S tolerance of A. vinosum and C. limicola supports their use in H2S desulfurization from biogas.
PB Elsevier
SN 0304-3894
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/56797
UL https://uvadoc.uva.es/handle/10324/56797
LA eng
NO Journal of Hazardous Materials, 2022, vol. 443, part B, 130337
NO Producción Científica
DS UVaDOC
RD 11-jul-2024