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 29-mar-2024