JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, vol.93, no.6, pp.1722-1732, 2018 (SCI-Expanded)
BACKGROUND: This study investigated utilization kinetics of ammonia-nitrogen induced by chronic sulfamethoxazole (SMX) exposure on biomass with an enriched nitrifying community. A lab-scale activated sludge system was supplied with 100 mg COD L-1 of peptone mixture and 50 mg N L-1 of ammonia nitrogen at a SRT of 15 days. At steady-state, the reactor was operated with additional daily SMX dosing of 50 mg L-1 for 35 days. Profiles of oxygen uptake rates and nitrogen fractions obtained in respirometric/batch experiments were used for estimation of nitrification kinetics.