2024-03-29T10:38:49Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/379772021-06-24T07:49:09Zcom_10324_35294com_10324_952com_10324_894com_10324_1173com_10324_931col_10324_35295col_10324_1371
Removal of contaminants of emerging concern from urban wastewater in novel algal-bacterial photobioreactors
López Serna, Rebeca
Posadas Olmos, Esther
García Encina, Pedro Antonio
Muñoz Torre, Raúl
Algal-bacterial processes
Procesos alga-bacteria
Emerging pollutants
Contaminantes emergentes
Microalgae
Microalgas
Microcontaminants
Microcontaminantes
Wastewater treatment
Tratamiento de aguas residuales
Producción Científica
This work evaluates the removal of five pharmaceuticals and personal care products, i.e., ibuprofen, naproxen, salicylic acid, triclosan and propylparaben, from urban wastewater under two novel algal-bacterial photobioreactor settings. The first configuration (phase A) consisted of an anoxic-aerobic photobioreactor operating at a hydraulic retention time (HRT) of 2 d at different concentrations of total organic carbon (TOC) (90 mg L−1–200 mg L−1). In the second configuration (phase B) an anaerobic step was introduced before the anoxic tank to set a photosynthetic A2O process. In this phase, the HRT varied between 3 and 4 d and the TOC was kept constant at 200 mg L−1. In addition, the impact of external aeration in the aerobic photobioreactor was assessed. The maximum removals for ibuprofen, naproxen, salicylic acid, triclosan and propylparaben (94 ± 1%, 52 ± 43%, 98 ± 2%, 100 ± 0%, 100 ± 0%, respectively) were recorded during phase B. In phase A, low TOC concentrations triggered higher ibuprofen and naproxen removals likely due to the high contribution of biological oxidation on their removal. In phase B, total or very high removal efficiencies were observed for ibuprofen, propylparaben and triclosan independently on the operating conditions. In contrast, the removal efficiency of naproxen and salicylic acid decreased when the HRT dropped from 4 to 3 d in the absence of external aeration, which suggests that biodegradation played a key role in their removal. In addition, sorption might have contributed to the elimination of triclosan and propylparaben from the wastewater.
Junta de Castilla y León (Projects UIC71 / CLU 2017-09 )
Ministerio de Ciencia, Innovación y Universidades (projects RED NOVEDAR / CTQ2017-84006-C3-1-R and grant Juan de la Cierva Incorporación JCI-2015-23304)
2019-09-17T08:26:38Z
2019-09-17T08:26:38Z
2019
info:eu-repo/semantics/article
info:eu-repo/semantics/submittedVersion
Science of The Total Environment, 2019, vol. 662. p. 32-40
0048-9697
http://uvadoc.uva.es/handle/10324/37977
https://doi.org/10.1016/j.scitotenv.2019.01.206
eng
https://www.sciencedirect.com/science/article/pii/S0048969719302256
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2019 Elsevier
application/pdf
Elsevier
https://uvadoc.uva.es/bitstream/10324/37977/4/Removal-contaminants-of%20concern-prep.pdf.jpg
Hispana
TEXT
http://creativecommons.org/licenses/by-nc-nd/4.0/
UVaDOC. Repositorio Documental de la Universidad de Valladolid
http://uvadoc.uva.es/handle/10324/37977