Robust control of an activated sludge wastewater treatment process

This paper presents the application of the Quantitative Feedback Theory (QFT) method to a wastewater treatment plant with activated sludge. The control strategy contains two control loops, with different dynamics, the controlled variables being the dissolved oxygen in the aerobic tank and the nitrate concentration in the effluent. The control strategy was validated on a ASM1 based wastewater treatment plant implemented in SIMBA® and considering a time-varying profile of the influent both in terms of the flow and the concentrations of wastewater compounds.

[1]  Mogens Henze,et al.  Activated sludge models ASM1, ASM2, ASM2d and ASM3 , 2015 .

[2]  I. Takács.  A dynamic model of the clarification-thickening process , 1991 .

[3]  Ramon Vilanova,et al.  Digital Control of a Waste Water Treatment Plant , 2011, Int. J. Comput. Commun. Control.

[4]  Marian Barbu,et al.  Predictive Control of a Wastewater Treatment Process , 2007, Int. J. Comput. Commun. Control.

[5]  Marian Barbu,et al.  QFT ROBUST CONTROL OF A WASTEWATER TREATMENT PROCESS , 2005 .

[6]  Isaac Horowitz,et al.  Optimum loop transfer function in single-loop minimum-phase feedback systems† , 1973 .

[7]  Constantine Garcia-Sanz,et al.  Wind Energy Systems: Control Engineering Design , 2012 .

[8]  Steven J. Rasmussen,et al.  Quantitative feedback theory: fundamentals and applications: C. H. Houpis and S. J. Rasmussen; Marcel Dekker, New York, 1999, ISBN: 0-8247-7872-3 , 2001, Autom..

[9]  Ramón Vilanova,et al.  Multi-loop PI-based control strategies for the Activated Sludge Process , 2009, 2009 IEEE Conference on Emerging Technologies & Factory Automation.

[10]  M. Barbu,et al.  QFT Robust Control of Wastewater Treatment Processes , 2012 .

[11]  Ulf Jeppsson,et al.  Application of multivariate virtual reference feedback tuning for wastewater treatment plant control , 2012 .

[12]  Fatiha Nejjari,et al.  Non-linear multivariable adaptive control of an activated sludge wastewater treatment process , 1999 .

[13]  Mario Garcia-Sanz,et al.  NON-DIAGONAL MULTIVARIABLE ROBUST QFT CONTROL OF A WASTEWATER TREATMENT PLANT FOR SIMULTANEOUS NITROGEN AND PHOSPHORUS REMOVAL , 2006 .