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Biodegradation of endocrine disruptors in solid-liquid two-phase partitioning systems by enrichment cultures

Villemur, Richard; Dos Santos, Silvia Cristina Cunha; Ouellette, Julianne; Juteau, Pierre; Lépine, François; Déziel, Éric (2013). Biodegradation of endocrine disruptors in solid-liquid two-phase partitioning systems by enrichment cultures Applied and Environmental Microbiology , vol. 79 , nº 15. p. 4701-4711. DOI: 10.1128/aem.01239-13.

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Résumé

Naturally occurring and synthetic estrogens and other molecules from industrial sources strongly contribute to the endocrine disruption of urban wastewater. Because of the presence of these molecules in low but effective concentrations in wastewaters, these endocrine disruptors (EDs) are only partially removed after most wastewater treatments, reflecting the presence of these molecules in rivers in urban areas. The development of a two-phase partitioning bioreactor (TPPB) might be an effective strategy for the removal of EDs from wastewater plant effluents. Here, we describe the establishment of three ED-degrading microbial enrichment cultures adapted to a solid-liquid two-phase partitioning system using Hytrel as the immiscible water phase and loaded with estrone, estradiol, estriol, ethynylestradiol, nonylphenol, and bisphenol A. All molecules except ethynylestradiol were degraded in the enrichment cultures. The bacterial composition of the three enrichment cultures was determined using 16S rRNA gene sequencing and showed sequences affiliated with bacteria associated with the degradation of these compounds, such as Sphingomonadales. One Rhodococcus isolate capable of degrading estrone, estradiol, and estriol was isolated from one enrichment culture. These results highlight the great potential for the development of TPPB for the degradation of highly diluted EDs in water effluents.

Type de document:
Mots-clés libres: Waste-water treatment, Sewag-treatment plant, Polycyclic aromatic-hydrocarbons, Estrogen-degrading bacteria, Activated sludge, Microbial consortium, Biological TREATMENT, SUBSTITUTED PHENOLS, ENHANCED DELIVERY; BISPHENOL-A
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 29 avr. 2014 18:54
Dernière modification: 29 avr. 2014 19:17
URI: http://espace.inrs.ca/id/eprint/2185

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