Single-Sludge Nitrogen Removal Model: Calibration and Verification
Publication: Journal of Environmental Engineering
Volume 125, Issue 7
Abstract
The objective of this work was to calibrate and verify a modified version of a mathematical model of a single-sludge system for nitrification and denitrification. The new model is based on long-term experimental results, and the main modifications are related to the biological oxygen demand removal kinetics and biomass activity expressions. The model consists of 22 equations with 54 parameters, including 19 kinetic and stoichiometric coefficients. Experiments were performed on four bench-scale units and one pilot plant fed with domestic wastewater. Six sets of runs were carried out under different operational conditions. In the calibration procedure, a mathematical algorithm was implemented, in which an optimal set of coefficients was selected. Several coefficients were directly determined experimentally. Model verification was based on the comparison of experimental results with the values predicted by the mathematical model using a fixed set of model coefficients for each set of runs. From the verification results, the model is considered to be a useful one for the design of a new treatment system and operation of an existing one.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 125 • Issue 7 • July 1999
Pages: 608 - 617
History
Received: Jun 12, 1998
Published online: Jul 1, 1999
Published in print: Jul 1999
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