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Por favor, use este identificador para citar o enlazar este ítem: http://uvadoc.uva.es/handle/10324/23454
Título: Photosynthetic biogas upgrading to bio-methane: Boosting nutrient recovery via biomass productivity control
Autor: Toledo Cervantes, Alma
Serejo, Mayara L.
Blanco, Saúl
Pérez Fernández, Rebeca
Lebrero Fernández, Raquel
Muñoz Torre, Raúl
Año del Documento: 2016
Editorial: Elsevier
Descripción: Producción Científica
Documento Fuente: Algal Research, 2016, Volume 17, pg.46–52
Resumen: A pilot high rate algal pond (HRAP) interconnected to an external CO2–H2S absorption column via settled broth recirculation was used to simultaneously treat a synthetic digestate and to upgrade biogas to a bio-methane with sufficient quality to be injected into natural gas grids. An innovative HRAP operational strategy with biomass recirculation based on the control of algal-bacterial biomass productivity (2.2, 4.4 and 7.5 g m− 2 d− 1) via settled biomass wastage was evaluated in order to enhance nutrient recovery from digestate at a constant hydraulic retention time. The influence of the recycling liquid to biogas (L/G) ratio on the quality of the upgraded biogas was assessed. The bio-methane composition under a L/G ratio of 1 (0.4 ± 0.1% CO2, 0.03 ± 0.04% O2, 2.4 ± 0.2% N2 and 97.2 ± 0.2% CH4) complied with the technical specifications of most European bio-methane legislations regardless of the biomass productivity established. The HRAP operational strategy applied allowed increasing the N and P recovery from 19 and 22% to 83 and 100%, respectively, when the biomass productivity was increased from 2.2 to 7.5 g m− 2 d− 1. Finally, the dynamics of microalgae and bacteria population structure were characterized by morphological identification and Denaturing Gradient Gel Electrophoresis analysis.
Palabras Clave: Biogás
Aguas residuales
Revisión por Pares: SI
DOI: https://doi.org/10.1016/j.algal.2016.04.017
Patrocinador: Ministerio de Economía, Industria y Competitividad (Proyect CTM2015-70442-R)
Version del Editor: https://www.journals.elsevier.com/algal-research
Idioma: eng
URI: http://uvadoc.uva.es/handle/10324/23454
Derechos: info:eu-repo/semantics/openAccess
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