Assessment of carbamazepine removal from hospital wastewater in a non conventional biofilter and the application of electro-oxidation as pre-treatment.

Navarro-Franco, Javier Alejandro ORCID: https://orcid.org/0000-0002-6067-7246; Garzón-Zúñiga, Marco A. ORCID: https://orcid.org/0000-0003-0124-0447; Drogui, Patrick ORCID: https://orcid.org/0000-0002-3802-2729; Barragán-Huerta, Blanca Estela ORCID: https://orcid.org/0000-0002-4988-6303; Vigueras-Cortés, Juan Manuel ORCID: https://orcid.org/0000-0001-5599-4944; Lozano-Guzmán, Eduardo ORCID: https://orcid.org/0000-0001-6760-2063 et Moreno-Cruz, Francisco Javier ORCID: https://orcid.org/0000-0002-9549-3498 (2022). Assessment of carbamazepine removal from hospital wastewater in a non conventional biofilter and the application of electro-oxidation as pre-treatment. Tecnología y ciencias del agua . 01-69. DOI: 10.24850/j-tyca-15-2-9.

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Résumé

Hospital wastewater (HWW) is characterized by a high drug concentration, which can cause endocrine effects and bacterial resistance, among others. For this study, carbamazepine (CBZ) was selected as a contaminant model to evaluate the removal efficiency from HWW of recalcitrant pharmaceuticals in a non-conventional biofilter (BF), packed with a mixture of wood chips (Prosopis) and porous rock (pouzzolane). The effect of electro-oxidation (EO) as pre-treatment was assessed as well. A biofilm adapted to the HWW was developed in the BF. The addition of high concentrations of CBZ (1,000 and 10,000 µg/L) to the influent HWW did not affect the removal efficiency of the BF to remove organic matter (73%) and ammonia nitrogen (99 %), proving that the biomass was not inhibited by the CBZ’s concentration. The BF showed a significant removal of CBZ by adsorption during the start-up. The bed filter showed an adsorption capacity of 19.84 µg/g (Co=10,000 µg/L). After the bed filter saturation operated in steady state, the BF removed by biotransformation 17.2 ± 7.4% of CBZ which, in terms of concentration (1,551 ± 664 µg/L), is bigger than the concentration in most of the reports for hospital, pharmaceutical and municipal WW effluents, which are between 0.1 and 890 µg/L. By applying electro-oxidation as a pretreatment, the global removal efficiency of CBZ increased to 55 ± 5.96 %. In the hybrid system, the EO biotransformed the CBZ, and in the BF the nitrogen and the COD were removed and showed CBZ desorption.

Type de document:	Article
Mots-clés libres:	biofiltration for EPs removal; natural supports for pharmaceutical removal; carbamazepine removal; pouzzolane and wood chips for pharmaceutical removal; electro-oxidation for EPs removal; hospital wastewater
Centre:	Centre Eau Terre Environnement
Date de dépôt:	02 nov. 2023 14:29
Dernière modification:	02 nov. 2023 14:29
URI:	https://espace.inrs.ca/id/eprint/13718

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