1. The kinetics for ammonium and nitrite oxidation under the effect of hydroxylamine.
- Author
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Xinyu Wan, Pengying Xiao, Daijun Zhang, Peili Lu, Zongbao Yao, and Qiang He
- Subjects
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HYDROXYLAMINE , *AMMONIUM & the environment , *NITRIFICATION kinetics , *SEWAGE analysis , *SEWAGE purification - Abstract
The kinetics for ammonium (NH4+) oxidation and nitrite (NO2–) oxidation under the effect of hydroxylamine (NH2OH) were studied by respirometry using the nitrifying sludge from a laboratoryscale sequencing batch reactor. Modified models were used to estimate kinetics parameters of ammonia and nitrite oxidation under the effect of hydroxylamine. An inhibition effect of hydroxylamine on the ammonia oxidation was observed under different hydroxylamine concentration levels. The self-inhibition coefficient of hydroxylamine oxidation and noncompetitive inhibition coefficient of hydroxylamine for nitrite oxidation was estimated by simulating exogenous oxygen-uptake rate profiles, respectively. The inhibitive effect of NH2OH on nitrite-oxidizing bacteria was stronger than on ammonia-oxidizing bacteria. This work could provide fundamental data for the kinetic investigation of the nitrification process. [ABSTRACT FROM AUTHOR] more...
- Published
- 2016
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