RT info:eu-repo/semantics/article
T1 Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading
A1 García Guzmán, Dimas Alberto
A1 Alcántara Pollo, Cynthia
A1 Blanco, Saúl
A1 Pérez Fernández, Rebeca
A1 Bolado Rodríguez, Silvia
A1 Muñoz Torre, Raúl
K1 Biogás
K1 Microalgas
AB This work evaluated the performance of an innovative anoxic-aerobic algal-bacterial photobioreactor coupled with biogas upgrading for the treatment of domestic wastewater via nitrification-denitrification. The process, which incorporated a biomass settling step followed by recycling to the anoxic tank, was operated at a hydraulic retention time of 2 days, a sludge retention time of ≈11 days under a 12 h/12 h light/dark irradiation cycle at 392 μE m−2 * s−1. An increase in the removal efficiency of TN from 38% to 81%, NH4+ from 39% to 97%, and P-PO43− from 59% to 64% were recorded when additional CO2 was supplied to the photobioreactor via biogas scrubbing, which supported an almost complete nitrification of the NH4+ to NO3− and promoted microalgae growth (with the subsequent enhancement in N and P assimilation). TOC removal remained constant at 90 ± 2% regardless of the addition of CO2, while the effluent biomass concentration averaged 26 ± 12 mg TSS/L. A DGGE-sequencing analysis of the bacterial community revealed the occurrence of 10 phyla, Proteobacteria being the dominant phylum. Finally, the morphological characterization of the microalgae population dynamics revealed a gradual dominance of the genus Scenedesmus, which accounted for 94–100% at the end of the experiment.
PB Elsevier
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/23549
UL http://uvadoc.uva.es/handle/10324/23549
LA eng
NO Chemical Engineering Journal, 2017, Volume 313, Pages 424–434
NO Producción Científica
DS UVaDOC
RD 28-nov-2024