Influence of Biogas Flow Rate on Biomass Composition During the Optimization of Biogas Upgrading in Microalgal-Bacterial Processes

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Influence of Biogas Flow Rate on Biomass Composition During the Optimization of Biogas Upgrading in Microalgal-Bacterial Processes

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Title: Influence of Biogas Flow Rate on Biomass Composition During the Optimization of Biogas Upgrading in Microalgal-Bacterial Processes
Author: Leite Serejo, Mayara;Posadas, Esther;Árpád Boncz, Marc;Blanco Lanza, Saúl;Garía Encina, Pedro;Muñoz, Raúl
xmlui.dri2xhtml.METS-1.0.item-contributor: Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad de la Universidad de Léon
xmlui.dri2xhtml.METS-1.0.item-area: Ecologia
Abstract: The influence of biogas flow rate (0, 0.3, 0.6, and 1.2 m3 m−2 h−1) on the elemental and macromolecular composition of the algal-bacterial biomass produced from biogas upgrading in a 180 L photobioreactor interconnected to a 2.5 L external bubbled absorption column was investigated using diluted anaerobically digested vinasse as cultivation medium. The influence of the external liquid recirculation/biogas ratio (0.5 < L/G < 67) on the removal of CO2 and H2S, and on the concentrations of O2 and N2 in the upgraded biogas, was also evaluated. A L/G ratio of 10 was considered optimum to support CO2 and H2S removals of 80% and 100%, respectively, at all biogas flow rates tested. Biomass productivity increased at increasing biogas flow rate, with a maximum of 12 ± 1gm−2 d−1 at 1.2 m3 m−2 h−1, while the C, N, and P biomass content remained constant at 49 ± 2%, 9 ± 0%, and 1 ± 0%, respectively, over the 175 days of experimentation. The high carbohydrate contents (60−76%), inversely correlated to biogas flow rates, would allow the production of ≈100 L of ethanol per 1000 m3 of biogas upgraded under a biorefinery process approach
xmlui.dri2xhtml.METS-1.0.item-desfisica: P. 3228-3236
xmlui.dri2xhtml.METS-1.0.item-peerreviewed: SI
Publisher: American Chemical Society
xmlui.dri2xhtml.METS-1.0.item-citation: Environmental Science & Technology, 2015, Mar 3;49(5)
URI: http://hdl.handle.net/10612/6993
Date: 2015-02-23
xmlui.dri2xhtml.METS-1.0.item-tipo: info:eu-repo/semantics/article
Subject: Biología
Ecología. Medio ambiente
xmlui.dri2xhtml.METS-1.0.item-palclave: Biogás
Biomasa
Bacterias
Algas
xmlui.dri2xhtml.METS-1.0.item-accessRights: info:eu-repo/semantics/openAccess
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