Pulicharla, Rama; Zolfaghari, Mehdi; Brar, Satinder Kaur; Drogui, Patrick 
ORCID: https://orcid.org/0000-0002-3802-2729; Auger, Serge; Verma, Mausam P. et Surampalli, Rao Y.
(2018).
Acute Impact of Chlortetracycline on Nitrifying and Denitrifying Processes.
Water Environment Research
, vol. 90
, nº 7.
pp. 604-614.
DOI: 10.2175/106143017X15131012153095.
Résumé
In the current study, sequential nitrification and anoxic experiments in synthetic municipal wastewater were exposed to 0.5 to 100 mg/L of chlortetracycline for 24 h to evaluate acute impact on the nitrification, and denitrification processes of biological treatment. Both processes were significantly (p < 0.05) inhibited at >50 mg/L of chlortetracycline, and the results revealed that nitrification was adversely affected by chlortetracycline compared with the anoxic process. In nitrification, chemical oxygen removal (COD) and ammonia oxidation kinetics were 50% inhibited at 10 mg chlortetracycline/L, and nitrite oxidation kinetics at 0.5 mg chlortetracycline/L. Likewise, in the anoxic process, 14 and 10 mg/L of chlortetracycline inhibited 50% of COD removal and nitrate reduction kinetics, respectively. In nitrification and denitrification, 90% of chlortetracycline was removed by adsorbing onto sludge suspended solids. In addition, a higher chlortetracycline concentration in anoxic effluent, compared with aerobic effluents, indicated a dissimilarity in the composition of sludge solids, pH, and biomass production for both processes.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | anoxic process; chlortetracycline; inhibition; kinetics; nitrification; toxicity |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 25 oct. 2018 19:20 |
| Dernière modification: | 15 févr. 2022 15:57 |
| URI: | https://espace.inrs.ca/id/eprint/7714 |
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