This work deals with the methodology put in place to fit and validate the parameters of a biofiltration model (BAF) in tertiary nitrification treatment and dynamic conditions. For an average loading rate of 0.65 kg NH4-N/m3 media/d, different time loading rates are applied inside a filtration-backwash run using a semi-industrial pilot. Comparisons between predicted and observed values on the NH4-N, NO3-N and TSS in treated water and the total head loss ΔP are carried out firstly using default values of BAF parameters. Model predictions overestimate values measured but trends are well reproduced. A sensitivity analysis is carried out and the hierarchy of BAF parameters has been set up classifying them into strong and low influence on the effluent concentrations. Among parameters revealing the strongest influence are those of the filtration module and the mean density of biofilm for the TSS effluent and the total ΔP, the specific autotrophic growth rate, the maximum biofilm thickness and the reduction coefficient of diffusivity in the biofilm for the NH4-N, NO3-N effluent. Finally, this classification leads to setting a calibration procedure, thanks to specific experimental tests directly measuring some BAF parameters.
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Research Article|
April 01 2007
Toward an operational dynamic model for tertiary nitrification by submerged biofiltration Available to Purchase
E. Vigne;
*Civil Engineering Department, Faculty of Sciences and Engineering, Pavillon Adrien-Pouliot, Laval University, Quebec, (Quebec) G1K 7P4, Canada (E-mail: [email protected]; [email protected])
**CEMAGREF – Water Quality Research Unit (QELY), 3 bis quai Chauveau - CP 220, 69336 , Lyon, Cedex 09, France (E-mail: [email protected]; [email protected])
E-mail: [email protected]
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J.M. Choubert;
J.M. Choubert
**CEMAGREF – Water Quality Research Unit (QELY), 3 bis quai Chauveau - CP 220, 69336 , Lyon, Cedex 09, France (E-mail: [email protected]; [email protected])
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J.P. Canler;
J.P. Canler
**CEMAGREF – Water Quality Research Unit (QELY), 3 bis quai Chauveau - CP 220, 69336 , Lyon, Cedex 09, France (E-mail: [email protected]; [email protected])
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A. Héduit;
A. Héduit
***CEMAGREF - Hydrosystems and Bioprocesses Research Unit (HBAN), Parc de Tourvoie – BP 44, 92163 , Antony, Cedex, France (E-mail: [email protected])
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P. Lessard
P. Lessard
*Civil Engineering Department, Faculty of Sciences and Engineering, Pavillon Adrien-Pouliot, Laval University, Quebec, (Quebec) G1K 7P4, Canada (E-mail: [email protected]; [email protected])
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Water Sci Technol (2007) 55 (8-9): 301–308.
Citation
E. Vigne, J.M. Choubert, J.P. Canler, A. Héduit, P. Lessard; Toward an operational dynamic model for tertiary nitrification by submerged biofiltration. Water Sci Technol 1 April 2007; 55 (8-9): 301–308. doi: https://doi.org/10.2166/wst.2007.271
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