A comprehensive model of simultaneous denitrification and methanogenic fermentation processes |
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| Authors: | A. Evren Tugtas U. Tezel Spyros G. Pavlostathis |
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| Affiliation: | 1. Department of Environmental Engineering, Bahcesehir University, Istanbul, Turkey;2. School of Civil and Environmental Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332‐0512;3. telephone: 404‐894‐9367;4. fax: 404‐894‐8266 |
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| Abstract: | The denitrification process was incorporated into the IWA Anaerobic Digestion Model No. 1 (ADM1) in order to account for the effect of denitrification on the methanogenic fermentation process. The model was calibrated and optimized using previously published experimental data and kinetic parameter values obtained with a mixed, mesophilic (35°C) methanogenic culture. Model simulations were used to predict the effect of nitrate reduction on the methanogenic fermentation process in batch, semi‐continuous, and continuous flow reactors experiencing operational changes and/or system disturbances. The extended model clearly revealed the importance of substrate competition between denitrifiers and non‐denitrifiers as well as the impact of N‐oxide inhibition on process interactions between fermentation, methanogenesis, and denitrification. Biotechnol. Bioeng. 2010;105: 98–108. © 2009 Wiley Periodicals, Inc. |
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| Keywords: | competition denitrification inhibition kinetics mathematical model methanogenesis |
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