RT info:eu-repo/semantics/article
T1 Removal of contaminants of emerging concern from urban wastewater in novel algal-bacterial photobioreactors
A1 López Serna, Rebeca
A1 Posadas Olmos, Esther
A1 García Encina, Pedro Antonio
A1 Muñoz Torre, Raúl
K1 Algal-bacterial processes
K1 Procesos alga-bacteria
K1 Emerging pollutants
K1 Contaminantes emergentes
K1 Microalgae
K1 Microalgas
K1 Microcontaminants
K1 Microcontaminantes
K1 Wastewater treatment
K1 Tratamiento de aguas residuales
AB 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.
PB Elsevier
SN 0048-9697
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/37977
UL http://uvadoc.uva.es/handle/10324/37977
LA eng
NO Science of The Total Environment, 2019, vol. 662. p. 32-40
NO Producción Científica
DS UVaDOC
RD 25-nov-2024