RT info:eu-repo/semantics/article
T1 Photosynthetic biogas upgrading to bio-methane: Boosting nutrient recovery via biomass productivity control
A1 Toledo Cervantes, Alma
A1 Serejo, Mayara L.
A1 Blanco, Saúl
A1 Pérez Fernández, Rebeca
A1 Lebrero Fernández, Raquel
A1 Muñoz Torre, Raúl
K1 Biogás
K1 Aguas residuales
AB 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.
PB Elsevier
YR 2016
FD 2016
LK http://uvadoc.uva.es/handle/10324/23454
UL http://uvadoc.uva.es/handle/10324/23454
LA eng
NO Algal Research, 2016,  Volume 17, pg.46–52
NO Producción Científica
DS UVaDOC
RD 18-nov-2024