Predicting the Simultaneous Oxidation of Ammonia, Nitrite, and m -cresol and Microbial Growth in a Sequencing Batch Reactor with a Kinetic Model Using Inhibition and Inactivation Effects
Applied Biochemistry and Biotechnology(2023)
摘要
The kinetic model derived in this study was able to adequately predict the simultaneous oxidation of ammonia, nitrite, and m -cresol and microbial growth using nitrifying sludge in a sequencing batch reactor. Time-varying inhibition and inactivation effects were successfully incorporated in the process kinetics to account for the past cell exposure history to m -cresol increasing concentrations (up to 150 mg C L −1 ). The initial concentration of the microbial species (ammonia and nitrite oxidizers, heterotrophs) was evaluated using pyrosequencing of DNA samples of the consortium. These measurements allowed to establish a model that explicitly handles specific reaction rates and to enhance the practical identifiability of the model parameters. A single simulation run was used to adequately predict the kinetic behavior of the main variables throughout the 242 cycles using a single set of initial conditions in the first cycle. This kind of dynamic model may be used as a helpful predictive tool to improve nitrification by avoiding the occurrence of severely repetitive inhibitive conditions due to the presence of inhibitive/toxic aromatic compounds.
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关键词
Kinetic modeling, Nitrifying consortia, Wastewater treatment, Aromatic compounds, Sequencing batch reactor
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