title: A comprehensive model of simultaneous denitrification and methanogenic fermentation processes.
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 degrees 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.
authors.affiliation: Department of Environmental Engineering, Bahcesehir University, Istanbul, Turkey.
authors.forename: A Evren
authors.initials: AE
authors.lastname: Tugtas
authors.forename: U
authors.initials: U
authors.lastname: Tezel
authors.forename: Spyros G
authors.initials: SG
authors.lastname: Pavlostathis
mesh_terms: D001673:Biodegradation, Environmental; D005285:Fermentation; D008697:Methane / Q000737:chemistry*; D008954:Models, Biological; D009566:Nitrates / Q000737:chemistry*
chemical_list: D009566:Nitrates; D008697:Methane