RT info:eu-repo/semantics/article
T1 Influence of alkalinity and temperature on photosynthetic biogas upgrading efficiency in high rate algal ponds
A1 Rodero Raya, María del Rosario
A1 Posadas Olmos, Esther
A1 Toledo Cervantes, Alma
A1 Lebrero Fernández, Raquel
A1 Muñoz Torre, Raúl
A1 Rodero, María del Rosario
A1 Posadas, Esther
A1 Toledo-Cervantes, Alma
A1 Lebrero, Raquel
A1 Muñoz, Raúl
AB Algal-bacterial photobioreactors have emerged as a cost-effective platform for biogas upgrading. The influence on biomethane quality of the inorganic carbon concentration (1500, 500 and 100 mg L−1) and temperature (12 and 35 °C) of the cultivation broth was evaluated in a 180 L high rate algal pond (HRAP) interconnected to a 2.5 L absorption column via settled broth recirculation. The highest CO2 and H2S removal efficiencies (REs) from biogas were recorded at the highest alkalinity (CO2-REs of 99.3 ± 0.1 and 97.8 ± 0.8% and H2S-REs of 96.4 ± 2.9 and 100 ± 0% at 12 and 35 °C, respectively), which resulted in CH4 concentrations of 98.9 ± 0.2 and 98.2 ± 1.0% at 12 and 35 °C, respectively, in the upgraded biogas. At the lowest alkalinity, the best upgrading performance was observed at 12 °C (CO2 and H2S-REs of 41.5 ± 2.0 and 80.3 ± 3.9%, respectively). The low recycling liquid to biogas ratio applied (0.5) resulted in a negligible O2 stripping regardless of the alkalinity and temperature, which entailed a biomethane O2 content ranging from 0 to 0.2 ± 0.3%.
PB Elsevier
SN 2211-9264
YR 2018
FD 2018
LK https://uvadoc.uva.es/handle/10324/83067
UL https://uvadoc.uva.es/handle/10324/83067
LA spa
NO Algal Research, July 2018, Volume 33, Pages 284-290
NO Producción Científica
DS UVaDOC
RD 27-feb-2026