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Identification of Data Requirements for Calibration of a Steady State ASM2d Model at GBWWTP Open Access


Other title
Modeling, ASM2d, Steady State, GBWWTP, Calibration, GPS-[X]
Type of item
Degree grantor
University of Alberta
Author or creator
Ghanesh , Ayishvaryaa
Supervisor and department
Dr. Ian Buchanan (Civil and Environmental Engineering)
Examining committee member and department
Dr. Warren Kindzierski (Public Health Sciences)
Dr. Tong Yu (Civil and Environmental Engineering)
Civil and Environmental Engineering

Date accepted
Graduation date
Master of Science
Degree level
An attempt was made to calibrate a steady state activated sludge model (ASM2d) for the biological nutrient removal process at the Gold bar wastewater treatment plant. This calibrated model could be used on a regular basis to test various operational strategies and predict effluent quality under different scenario. To achieve this historic data from the plant database was collected based on 24 composite samples. A trial and error method of wastewater characterization of the primary effluent was attempted using the influent advisor module of the GPS-[X] software. Sensitivity analysis of kinetic parameters was carried out and the most important ones identified were calibrated (default values were modified) based on literature. After calibration it was observed that the model was overestimating the concentrations of carbonaceous biological oxygen demand, total suspended solids and orthophosphate in the effluent, compared to the actual value measured at the plant. Similarly the effluent ammonia concentration was underestimated for most days along with the nitrate and nitrite concentration. This clearly indicated the need for a more accurate calibration based on experimental data to improve prediction capabilities and the reliability of the model.
License granted by AYISHVARYAA GHANESH ( on 2010-01-29 (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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