Model of Aeration System at Biological Wastewater Treatment Plant for Control Design Purposes
- 390 Downloads
The wastewater treatment plant (WWTP) is a dynamic, very complex system, in which the most important control parameter is the dissolved oxygen (DO) concentration. The air is supplied to biological WWTP by the aeration system. Aeration is an important and expensive activity in WWTP. The aeration of sewage fulfils a twofold role. Firstly, oxygen is provided as the main component for biological processes. Secondly, it supports mixing the sludge with the delivered sewage, which helps to treat the sewage. The paper proposes a model of the aeration system for biological WWTP located in Northeast Poland. This aeration system consists of the blowers, the main collector pipeline, three lines of the aeration with different diameters and lengths and diffusers. This system is a nonlinear dynamic system with faster dynamics compared to the internal dynamics of the DO at the biological WWTP. Control of the aeration system is also difficult in terms of control of the DO. A practical approach to model identification and validation is proposed. Simulation tests for aeration system at Matowskie Pastwiska WWTP are presented.
KeywordsAeration system Modelling Nonlinear system Wastewater treatment plant
The authors would like to thank the staff of the Matowskie Pastwiska WWTP for their help with access to the plant, information and data.
- 1.Wilderer, P.A., Irvine, R.L., Goronszy, M.: Sequencing Batch Reactor Technology. Scientific and Technical Report No. 10, IWA Publishing, London (2001)Google Scholar
- 6.Błaszkiewicz, K., Piotrowski, R., Duzinkiewicz, K.: A model-based improved control of dissolved oxygen concentration in sequencing wastewater batch reactor. Stud. Inf. Control 23(4), 323–332 (2014)Google Scholar
- 9.Piotrowski, R., Skiba, A.: Nonlinear fuzzy control system for dissolved oxygen with aeration system in sequencing batch reactor. Inf. Technol. Control 44(2), 182–195 (2015)Google Scholar
- 11.Piotrowski, R., Błaszkiewicz, K., Duzinkiewicz, K.: Analysis the parameters of the adaptive controller for quality control of dissolved oxygen concentration. Inf. Technol. Control 45(1), 42–51 (2016)Google Scholar
- 15.Krawczyk, W., Piotrowski, R., Brdyś, M.A., Chotkowski, W.: Modelling and identification of aeration systems for model predictive control of dissolved oxygen – Swarzewo wastewater treatment plant case study. In: Conference: Proceedings of the 10th IFAC Symposium on Computer Applications in Biotechnology, Cancun, Mexico, 4–6 June 2007 (2007)Google Scholar
- 16.Renouard, M.P.: Nouvelles règles à calcul pour la détermination des pertes de charge dans les conduites de gaz. Journal des Usines à Gaz, 337–339 (1952)Google Scholar