Lab-scale experimental strategy for determining micropollutant partition coefficient and biodegradation constants in activated sludge - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Environmental Science and Pollution Research Année : 2015

Lab-scale experimental strategy for determining micropollutant partition coefficient and biodegradation constants in activated sludge

Méthodologie de détermination du coefficient de partition et des constantes de biodégradation de micropolluants en boues activées

Résumé

The nitrifying/denitrifying activated sludge process removes several micropollutants from wastewater by sorption onto sludge and/or biodegradation. The objective of this paper is to propose and evaluate a lab-scale experimental strategy for the determination of partition coefficient and biodegradation constant for micropollutant with an objective of modelling their removal. Four pharmaceutical compounds (ibuprofen, atenolol, diclofenac and fluoxetine) covering a wide hydrophobicity range (log Kow from 0.16 to 4.51) were chosen. Dissolved and particulate concentrations were monitored for 4 days, inside two reactors working under aerobic and anoxic conditions, and under different substrate feed conditions (biodegradable carbon and nitrogen). We determined the mechanisms responsible for the removal of the target compounds: (i) ibuprofen was biodegraded, mainly under aerobic conditions by cometabolism with biodegradable carbon, whereas anoxic conditions suppressed biodegradation; (ii) atenolol was biodegraded under both aerobic and anoxic conditions (with a higher biodegradation rate under aerobic conditions), and cometabolism with biodegradable carbon was the main mechanism; (iii) diclofenac and fluoxetine were removed by sorption only. Finally, the abilities of our strategy were evaluated by testing the suitability of the parameters for simulating effluent concentrations and removal efficiency at a full-scale plant.
Fichier non déposé

Dates et versions

hal-02600989 , version 1 (16-05-2020)

Identifiants

Citer

Maxime Pomies, J.M. Choubert, Christelle Wisniewski, Cecile Miege, H. Budzinski, et al.. Lab-scale experimental strategy for determining micropollutant partition coefficient and biodegradation constants in activated sludge. Environmental Science and Pollution Research, 2015, 22 (6), pp.4383-4395. ⟨10.1007/s11356-014-3646-5⟩. ⟨hal-02600989⟩
33 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More