RT info:eu-repo/semantics/article
T1 Simultaneous biogas upgrading and centrate treatment in an outdoors pilot scale high rate algal pond
A1 Posadas Olmos, Esther
A1 Marín, David
A1 Blanco, Saúl
A1 Lebrero Fernández, Raquel
A1 Muñoz Torre, Raúl
K1 Aguas residuales
K1 Microalgas
AB 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.
PB Elsevier
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/23531
UL http://uvadoc.uva.es/handle/10324/23531
LA eng
NO Bioresource Technology , 2017, Volume 232, Pages 133–141
NO Producción Científica
DS UVaDOC
RD 18-nov-2024