Seyhi, Brahima; Drogui, Patrick; Buelna, Gerardo et Blais, Jean-François 
ORCID: https://orcid.org/0000-0003-3087-4318
(2012).
Removal of bisphenol-A from spiked synthetic effluents using an immersed membrane activated sludge process.
Separation and Purification Technology
, vol. 87
.
pp. 101-109.
DOI: 10.1016/j.seppur.2011.11.029.
Résumé
With the recent emergence of estrogenic contaminants as reclaimed wastewater quality issue, our study has investigated the removal of bisphenol-A (BPA) using a submerged membrane bioreactor. Experiments were performed at initial BPA concentrations ranging from 1.0 to 15 mg/L. A very low sludge mineralization occurred in the bioreactor (with a VSS/TSS ratio around 0.8–0.9), irrespective of the variation of biomass concentration and a long retention time of solids. The specific oxygen uptake rate values recorded did not reveal any significant change in the microbial respiratory activity in the absence (2.00 mg O₂/g VSS h) and in the presence (1.4 mg O₂/g VSS h) of BPA in the synthetic effluent. The performance of the bioreactor in terms of COD removal remained constant and reached 99% irrespective of the hydraulic retention time imposed (3–6 h), whereas 66–99% of COD removal was recorded while using conventional activated sludge system. The limit of the toxicity (21.6 g BPA/m³/d) determined for the bioreactor membrane system was higher than that recorded for the conventional activated sludge (2.5 g BPA/m³/d). BPA was effectively removed in the membrane bioreactor (abatement ⩾98% was reached) due to adsorption and biodegradation/transformation processes. Residual BPA concentrations recorded in the mixed liquor remained low (0.017–0.004 mg/L), when the raw wastewater contained a concentration of 1.0 mg BPA/L. This indicates that BPA was not accumulated in the membrane bioreactor, but bacteria oxidized it. Likewise, the membrane bioreactor was found to be effective in removing ammonia–nitrogen (>99% of N–NH₄ removed), whereas 61% of phosphate (P–PO₄) could be simultaneously removed. The membrane bioreactor was a total barrier for total suspended solid and turbidity was effectively removed (residual turbidity was lower than 1.0 NTU).
| Type de document: | Article |
|---|---|
| Mots-clés libres: | membrane bioreactor; synthetic effluent; bisphenol-A; estrogenic contaminants |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 19 oct. 2018 15:11 |
| Dernière modification: | 18 févr. 2022 20:07 |
| URI: | https://espace.inrs.ca/id/eprint/7319 |
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