2024-03-28T09:26:01Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/235492021-06-24T07:35:02Zcom_10324_1173com_10324_931com_10324_894com_10324_31059com_10324_954col_10324_1371col_10324_31061
García Guzmán, Dimas Alberto
Alcántara Pollo, Cynthia
Blanco, Saúl
Pérez Fernández, Rebeca
Bolado Rodríguez, Silvia
Muñoz Torre, Raúl
2017-06-19T14:27:50Z
2017-06-19T14:27:50Z
2017
Chemical Engineering Journal, 2017, Volume 313, Pages 424–434
http://uvadoc.uva.es/handle/10324/23549
https://doi.org/10.1016/j.cej.2016.12.054
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.
eng
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 International
Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading
info:eu-repo/semantics/article