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Título
Photobioreactors based on microalgae-bacteria and purple phototrophic bacteria consortia: A promising technology to reduce the load of veterinary drugs from piggery wastewater
Autor
Año del Documento
2019
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Science of The Total Environment, 2019. In Press
Résumé
Traditional swine manure treatments are not fully effective in the removal of veterinary drugs. Moreover, they are costly and entail a significant carbon footprint in many cases. Innovative biological approaches based on phototrophic microorganisms have recently emerged as promising alternatives to overcome those limitations. This work evaluated the removal of 19 veterinary drugs (i.e., 16 antibiotics, 1 analgesic, 1 anti-parasitic and 1 hormone) from piggery wastewater (PWW) in two open photobioreactors (PBR) operated with a consortium of microalgae-bacteria (AB-PBR) and purple photosynthetic bacteria (PPB-PBR). Multiple hydraulic retention times (HRT), in particular 11, 8 and 4 days, were tested during stage I, II and III, respectively. Ten out of 19 target compounds were detected with inlet drug concentrations ranging from ‘non-detected’ (n.d.) to almost 23,000 ng L−1 for the antibiotic oxytetracycline. Moreover, three of the antibiotics (i.e., enrofloxacin, sulfadiazine and oxytetracycline) were found at concentrations above the analytical linearity range in some or all of the samples under study. AB-PBR supported higher removal efficiencies (REs) than PPB-PBR, except for danofloxacin. Overall, REs progressively decreased when decreasing the HRT. The highest REs (>90%) were observed for doxycycline (95 ± 3%) and oxytetracycline (93 ± 3%) in AB-PBR during stage I. The other drugs, except sulfadimidine that was the most recalcitrant, showed REs above 70% during stage I in the same photobioreactor. In contrast, no removal was observed for danofloxacin in AB-PBR during stage III, sulfadimidine in PPB-PBR during stage III or marbofloxacin in PPB-PBR during the entire experiment.
Palabras Clave
Algal-bacterial processes
Procesos algal-bacterianos
Emerging pullutants
Contaminantes emergentes
Microcontaminants
Microcontaminantes
Swine manure
Estiércol porcino
ISSN
0048-9697
Revisión por pares
SI
Patrocinador
Gobierno regional de Castilla y León- FEDER (CLU 2017-09 and UIC71)
EURICA program (Erasmus Mundus Action 2, Strand 1, Lot 15, grant 2013-2587)
Ministerio de Ciencia, Innovación y Universidades (projects JCI-2015-23304, RED NOVEDAR and CTQ2017-84006-C3-1-R)
EURICA program (Erasmus Mundus Action 2, Strand 1, Lot 15, grant 2013-2587)
Ministerio de Ciencia, Innovación y Universidades (projects JCI-2015-23304, RED NOVEDAR and CTQ2017-84006-C3-1-R)
Version del Editor
Propietario de los Derechos
© 2019 Elsevier
Idioma
eng
Tipo de versión
info:eu-repo/semantics/acceptedVersion
Derechos
openAccess
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