Thermodynamic Model of Nitrification Kinetics
Publication: Journal of Environmental Engineering
Volume 118, Issue 4
Abstract
The ammonia oxidation rate of Nitrosomonas spp. is tested at various nitrite concentrations from 14 to 296 mg‐N/L in fresh water at 28.4 °C. The nitrite oxidation rate of Nitrobacter spp. is tested at various nitrate concentrations of 11–250 mg N/L. The oxidation rates of both bacteria are found to be linearly correlated to free‐energy changes with coefficients of determination of 0.841 and 0.934. It is shown that the Monod kinetic model with end‐product inhibition can be more simply and precisely modeled by a proposed thermodynamic model. At the same ratio of ammonia/nitrite and nitrite/nitrate over the range of 0.001–0.1, the ammonia conversion rate is about double that of the nitrite conversion rate. Management strategies can be devised to maximize the nitrite removal rate. Further, by knowing the thermodynamic model's parameters, the reactor's performance can be optimized during the peak loading period while minimizing nitrite pulses in the effluent.
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 118 • Issue 4 • July 1992
Pages: 568 - 584
Copyright
Copyright © 1992 ASCE.
History
Published online: Jul 1, 1992
Published in print: Jul 1992
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