Bioremediation of emerging micropollutants in irrigation water. The alternative of microalgae-based treatments

Vassalle, Lucas; Sunyer-Caldú, Adrià; Uggetti, Enrica; Díez-Montero, Rubén; Díaz˗Cruz, M. Silvia; García, Joan

doi:10.1016/j.jenvman.2020.111081

Cited by 23 publications

(15 citation statements)

References 75 publications

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“…The elimination of BP3 was variable, with removals ranging from −28% to 51%. This results agree with those obtained by Díaz-Garduño et al [47], using HRAP as tertiary treatment for WWTPs effluents, with RE% ranging from −50% to 70%, and also with those obtained in a closed photobioreactor operating as tertiary treatment (40% removal on average) [58]. BP3 has been even found in tap water at concentrations up to 290 ng L −1 [64] and also in sewage sludge (0.79 µg g −1 ) [65].…”

Section: Uv Filterssupporting

confidence: 91%

“…Ketoprofen was eliminated by 33% in average, with RE ranging from negative to 100%. Previous studies also obtained elimination efficiencies, ranging from 0% to 50% in HRAPs [47], also in closed photobioreactors [58]. Similarly, naproxen was only moderately removed (45% on average), with RE% ranging from −3% to 100%.…”

Section: Pharmaceuticalsmentioning

confidence: 67%

“…Negative RE% were obtained for trimethoprim in the HRAP (−32% in average), meaning that higher concentrations were found in the effluent than in the influent. Previous studies also obtained negative and low RE% for trimethoprim (3.7%) in HRAPs [47], but elimination efficiencies up to 78% have been obtained in a closed photobioreactor working as tertiary treatment [58,67,68]; in that same study, however, the elimination of sulfapyridine was negative, whereas a 4% removal in average has been obtained in his work. On the other hand, sulfathiazole was fully removed within the HRAP.…”

Section: Pharmaceuticalsmentioning

confidence: 69%

“…Last of all, caffeine was efficiently removed (63-80%), except for one day (14%). Matamoros et al [17] obtained RE% > 90% for this compound, but lower and even negative RE% have been also reported [47,58]. Table S5B gives more detailed information on the pharmaceutical levels detected on each sampling day.…”

Section: Pharmaceuticalsmentioning

confidence: 86%

“…To the author's knowledge, only Matamoros et al [17] had previously studied the removal of BZT in HRAPs, obtaining eliminations in the range of 33-74% under the same HRT (4 d). Vassalle et al [58] investigated the removal of this compound in closed photobioreactors, obtaining similar efficiencies (15% removal in average). The results obtained in different conventional WWTPs are highly variable and can range from negative RE up to 70% [40].…”

Section: Benzotriazolesmentioning

confidence: 95%

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Behavior of UV Filters, UV Blockers and Pharmaceuticals in High Rate Algal Ponds Treating Urban Wastewater

Vassalle

Sunyer-Caldú

Díaz-Cruz

et al. 2020

Water

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The present study evaluated the efficiency of a high rate algal pond (HRAP) at pilot scale to remove pharmaceuticals and personal care products (PPCPs) from urban wastewater, including UV-filters and parabens (10), benzotriazoles (4), antibiotics (15), anti-inflammatories (3) and other pharmaceuticals (3). A total of 35 compounds were targeted, of which 21 were detected in the influent wastewater to the HRAP. Removals (RE%) for pharmaceuticals were variable, with efficient eliminations for atenolol (84%) and sulfathiazole (100%), whereas the anti-inflammatories naproxen and ketoprofen were only partially removed <50%. Benzotriazoles showed elimination rates similar to those of conventional WWTPs, with RE% ranging from no elimination to 51% for the UV filter benzophenone-3 (BP3) and 100% for 4-methylbenzilidenecamphor (4MBC). Hazard quotients (HQs) were estimated for those compounds not fully eliminated in the HRAP, as well as the cumulative ecotoxicity in the resulting effluent. The majority of the compounds yielded HQs < 0.1, meaning that no environmental risk would be derived from their discharge. Overall, these results clearly indicate that HRAPs are a reliable, green and cost-effective alternative to intensive wastewater treatment, yielding promising results removing these contaminants.

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