Ouarda, Yassine; Tiwari, Bhagyashree; Azaïs, Antonin; Vaudreuil, Marc-Antoine; Ndiaye, Sokhna Dieng; Drogui, Patrick 
ORCID: https://orcid.org/0000-0002-3802-2729; Tyagi, Rajeshwar Dayal; Sauvé, Sébastien; Desrosiers, Mélanie; Buelna, Gerardo et Dubé, Rino
(2018).
Synthetic hospital wastewater treatment by coupling submerged membrane bioreactor and electrochemical advanced oxidation process: Kinetic study and toxicity assessment.
Chemosphere
, vol. 193
.
pp. 160-169.
DOI: 10.1016/j.chemosphere.2017.11.010.
Résumé
In this work, the combination of membrane bioreactor (MBR) and electro-oxidation (EO) process was studied for the treatment of a synthetic hospital wastewater fortified with four pharmaceutical pollutants namely carbamazepine (CBZ), ibuprofen (IBU), estradiol (E-E) at a concentration of 10 μg L ⁻¹ venlafaxine (VEN) at 0.2 μg L⁻¹. Two treatment configurations were studied: EO process as pre-treatment and post-treatment. Wastewater treatment with MBR alone shows high removal percentages of IBU and E-E (∼90%). Unlikely for CBZ and VEN, a low elimination percentage (∼10%) was observed. The hydraulic and the solid retention times (HRT and SRT) were 18 h and 140 d respectively, while the biomass concentration in the MBR was 16.5 g L⁻¹. To enhance pharmaceuticals elimination, an EO pretreatment was conducted during 40 min at 2 A. This configuration allowed a 92% removal for VEN, which was far greater than both treatments alone, with lower than 30% and 50% for MBR and EO, respectively. The MBR-EO coupling (EO as post-treatment) allows high removal percentages (∼97%) of the four pharmaceutical pollutants after 40 min of treatment at a current intensity of 0.5 A with Nb/BDD as electrodes. This configuration appears to be very effective compared to the first configuration (EO-MBR) where EO process is used as a pre-treatment. Toxicity assessment showed that the treated effluent of this configuration is not toxic to Daphnia magna except at 100% v/v. The MBR-EO coupling appears to be a promising treatment for contaminated hospital effluents.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | hospital wastewaters; pharmaceutical pollutants; electrochemical advanced oxidation process; membrane bioreactor; Daphnia toxicity test |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 12 févr. 2018 20:59 |
| Dernière modification: | 15 févr. 2022 15:50 |
| URI: | https://espace.inrs.ca/id/eprint/6572 |
Gestion Actions (Identification requise)
 |
Modifier la notice |