№5|2022

WASTEWATER TREATMENT

DOI 10.35776/VST.2022.05.03

UDC 628.35

# Comparison of the results of calculating aeration tanks according to the method of Danilovich–Epov and ASM2d model (part 1)

### Summary

The analysis of the method proposed by D. A. Danilovich and A. N. Epov for calculating aeration tanks that implement nitrogen and phosphorus removal technologies is carried out. A comparison of the results of calculations by this method and ASM2d method is given. It is shown that, in contrast to the ASM2d method that refers to theoretical models and describes the processes of biological wastewater treatment using the formulas of enzyme kinetics, the method under consideration is, in essence, an empirical calculation that contains constants that are invariable and, for the most part, not having the physical meaning. Since empirical models make a connection between the parameters obtained on the basis of the experimental data of a particular object under strictly limited conditions, these models can only be applied if all the parameters of another object exactly match the data of the object the proposed model was compiled for. Accordingly, using any empiric models, including the method under consideration, at the facilities that were not the objects for the compilation of these empiric models, leads to the risk of obtaining incorrect calculation results. Based on the performed calculations, the risks and constraints of using the method proposed by Danilovich and Epov for the calculation of biological treatment facilities are shown. In the first part of the paper, a design analysis was carried out to determine the values of the aerobic age of activated sludge that were the basic values for calculating the volume of aerobic zones of aeration tanks.

Key words

wastewater , biological treatment , nitrification , denitrification , activated sludge , kinetic constants , theoretical and empirical mathematical models , comparative calculation of the biological treatment facilities , ASM2d

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### REFERENCES

- Khar’kina O. V. [Terms of reference for the reconstruction of treatment facilities: how to avoid mistakes (part 1)]. Nailuchshchie Dostupnye Tekhnologii Vodosnabzheniia i Vodootvedeniia, 2021, no. 2, pp. 48–53. (In Russian).
- Khar’kina O. V. [Terms of reference for the reconstruction of treatment facilities: how to avoid mistakes (part 2)]. Nailuchshchie Dostupnye Tekhnologii Vodosnabzheniia i Vodootvedeniia, 2021, no. 3, pp. 53–59. (In Russian).
- Shvetsov V. N., Khar’kina O. V., Stepanov S. V. [Comparison of the calculation results for aeration tanks using the NII VODGEO/SAMGTU and ASM2d models]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2021, no. 5, pp. 18–29. (In Russian).
- Khar’kina O. V., Iskalieva K. R., Malich E. V. [Comparison of aeration tank calculations using ASM2d and ATV models]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2021, no. 7, pp. 13–22. (In Russian).
- Khar’kina O. V. [Method of calculating biological treatment facilities: comparative analysis]. Nailuchshchie Dostupnye Tekhnologii Vodosnabzheniia i Vodootvedeniia, 2021, no. 6, pp. 50–62. (In Russian).
- Danilovich D. A., Epov A. N. Raschet i tekhnologicheskoe proektirovanie protsessov i sooruzhenii udaleniia azota i fosfora iz gorodskikh stochnykh vod [Calculation and design of the processes of removing nitrogen and phosphorus from municipal wastewater. Moscow, 2020, 225 p.].
- Moizhes O. V. [Application of the dynamic model «OxiD» for the reconstruction of LWWTF aeration tanks using the technology of biological removal of nitrogen and phosphorus]. Proceedings of WasteTech–2005 International Congress. Moscow, 2005, pp. 112–116. (In Russian).
- Moizhes O. V. [OxiD dynamic model of wastewater biological treatment facilities]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2008, no. 10, pp. 52–57. (In Russian).
- Khar’kina O. V., Zakiev R. R. [Achieving the stable quality of effluent at the level of MPC for commercial fishing reservoirs]. Book of reports of International Scientific and Technical Conference Dedicated to the Memory of S. V. Iakovlev, Academician of RAS. – Moscow, 2020, pp. 198–201. (In Russian).
- Moizhes O. V. [OxiD mathematical model of wastewater treatment processes]. Proceedings of ECWATECH–2004 International Congress, Moscow, 2004, pp. 44–47. (In Russian).
- Moizhes O. V. [Dynamic modeling of aeration tanks based on the results of their lay out]. Proceedings of ECWATECH–2004 International Congress, Moscow, 2004, pp. 48–52. (In Russian).
- Moizhes O. V., Shotina K. V. [Dynamic simulation – a promising approach to the design of biological wastewater treatment facilities]. Ekologiia i Promyshlennost’ Rossii, 2009, no. 2, pp. 10–11. (In Russian).
- Shvetsov V. N., Morozova K. M., Stepanov S. V. [Designing facilities for municipal and industrial wastewater biological treatment in aeration tanks with nutrients removal]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2018, no. 9, pp. 26–39. (In Russian).
- Henze M., Gujer W., Mino T., van Loosdrecht V. Activated sludge models ASM1, ASM2, ASM2d and ASM3. London, IWA Publishing, 2000. 130 р.
- Henze M., Laslie Grady Jr. C. P., Gujer W., Marais GvR., Matsuo T. A general model for single-sludge wastewater treatment system. Water Research, 1987, no. 21 (5), pp. 505–515.
- Marais GvR., Ekama G. A. The activated sludge processes. Part 1. Steady state behavior. Water SA, 1976, no. 2 (4), pp. 163–200.
- Gujer W. Design of a nitrifying activated sludge process with the aid of dynamic simulation. Water Technology, 1977, no. 9 (2), pp. 323–336.
- Moizhes O. V. Razrabotka tekhnologii udaleniia biogennykh elementov iz gorodskikh stochnykh vod s defosfotatsiei v anoksidnykh usloviiakh [Development of a technology for the removal of nutrients from municipal wastewater with dephosphorization under anoxic conditions. Synopsis of a thesis for Ph. D.
- degree in Engineering. Volgograd, 2013, 136 p.].