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Title: Simultaneous biogas upgrading and centrate treatment in an outdoors pilot scale high rate algal pond
Authors: Posadas, Esther
Marín, David
Blanco, Saúl
Lebrero Fernández, Raquel
Muñoz Torre, Raúl
Issue Date: 2017
Publisher: Elsevier
Description: Producción Científica
Citation: Bioresource Technology , 2017, Volume 232, Pages 133–141
Abstract: 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.
Classification: Aguas residuales
Peer Review: SI
Sponsor: Ministerio de Economía, Industria y Competitividad (Project CTM2015-70442-R and Red Novedar)
Publisher Version:
Language: eng
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:GTA - Artículos de revista
DEP48 - Artículos de revista

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