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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References
1.
Argaman, Y. (1991). “Chemical reaction engineering and activated sludge—A research no.” Water Res., 25(12), 1583–1586.
2.
Argaman, Y. (1995). “A steady-state model for the single-sludge activated sludge system. 1. Model description.” Water Res., 29(1), 137–145.
3.
Argaman, Y., Eckenfelder, W. W. Jr., and O'Reilly, A. J. (1998). “Applicability of batch tests data for industrial wastewater continuous flow process design.” WEFTEC'98, Vol. 3, 453–461.
4.
Chai Sung Gee, Pfeffer, J. T., and Suidan, M. T. (1990). “Nitrosomonas and nitrobacter interactions in biological nitrification.”J. Envir. Engrg., ASCE, 116(1), 4–17.
5.
Daigger, G. T., and Grady, C. P. L. Jr. (1995). “The use of models in biological process design.” 68th Annu. Conf., Water Environment Federation, Alexandria, Va.
6.
Drtil, M., Nemeth, P., and Bodik, I. (1993). “Kinetic constants of nitrification.” Water Res., 27(1), 35–39.
7.
Eckenfelder, W. W. Jr. (1990). “Estimating oxygen requirements and waste sludge from activated sludge with and without primary clarifiers treating municipal wastewater.” Envir. Technol., 11(5), 793–798.
8.
Ekama, G. A., Dold, P. L., and Marais, G. V. R. (1986). “Procedures for determining influent COD fractions and the maximum specific growth rate of heterotrophs in activated sludge system.” Water Sci. and Technol., 18(6), 91–114.
9.
Grau, P., Dohanyos, M., and Chudoba, J. (1975). “Kinetics of multi-component substrate removal by activated sludge.” Water Res., 9(7), 637–642.
10.
Gujer, W., Henze, M., Mino, T., Matsuo, T., Wentzel, M. C., and Marais, G. V. R. (1995). “The activated sludge model no. 2: Biological phosphorus removal.” Water Sci. and Technol., 31(2), 1–11.
11.
Hanaki, K., Wantawin, C., and Ohgaki, S. (1990). “Effects of the activity of heterotrophs on nitrification in a suspended-growth reactor.” Water Res., 24(3), 289–296.
12.
Henze, M. (1986). “Nitrate versus oxygen utilization rates determination.” Water Sci. and Technol., 18(6), 115–122.
13.
Kappeler, J., and Gujer, W. (1992). “Estimation of kinetic parameters of heterotrophic biomass under aerobic conditions and characterization of wastewater for activated sludge modeling.” Water Sci. and Technol., 25(6), 125–139.
14.
Knowless, G., Downing, A. L., and Barrett, M. J. (1965). “Determination of kinetic constants for nitrifying bacteria in mixed culture, with the aid of an electronic computer.” J. Gen. Microbiol., 38(2), 208–219.
15.
Kroiss, H., and Ruider, E. (1977). “Comparison of the plug-flow and completely mixed activated sludge process.” Progress in Water Technol., 8(6), 169–173.
16.
Metcalf and Eddy. (1991). Wastewater engineering treatment, disposal and reuse, 3rd Ed., McGraw-Hill, New York.
17.
Nitrogen control. (1993). EPA/625/R-93/010. U.S. Environmental Protection Agency, Washington, D.C.
18.
PEST. (1997). “Parameter estimation.” http://www.0zemail.com.au/%7Ewcomp/pcstsoft.html
19.
Quirk, T. P., and Eckenfelder, W. W. Jr. (1986). “Active biomass in activated sludge analysis and design.” J. WPCF, 58(9), 932–936.
20.
Standard methods for the examination of water and wastewater, 19th Ed. (1996). American Public Health Association, American Water Works Association, and Water Pollution Control Federation, Washington, D.C.
21.
Stenstrom, M. K., and Song, S. S. (1991). “Effect of oxygen transport limitation on nitrification in the activated sludge process.” J. WPCF, 63(3), 208–219.
22.
Tischler, L. F., and Eckenfelder, W. W. Jr. (1969). “Linear substrate removal in the activated sludge process.” Advances in water pollution research. Pergamon, Tarrytown, N.Y.
23.
van Niekerk, A., Jenkins, D., and Richard, M. G. (1987). “Application of batch kinetic data to the sizing of continuous flow activated sludge reactors.” Water Sci. and Technol., 19(3/4), 505–516.
24.
Williamson, K., and McCarty, P. L. (1975). “Rapid measurement of Monod half-velocity coefficients for bacterial kinetics.” Biotechnol. Bioengrg., 17(6), 915–924.
25.
Wolfbauer, O., Klettner, H., and Moser, F. (1978). “Reaction engineering models of biological waste water treatment and the kinetics of the activated sludge process.” Chemical Engrg. Sci., 33(8), 953–960.
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Received: Jun 12, 1998
Published online: Jul 1, 1999
Published in print: Jul 1999
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