Title :
Model Reduction Based on Time-Scale Decomposition for Wastewater Treatment Process
Author :
Xie, Shenggang ; Zhou, Lifang ; Ma, Ailiang ; Zhao, Linling
Author_Institution :
Dept. of Syst. Eng., Zhejiang Univ., Hangzhou
Abstract :
The wastewater treatment process (WWTP) based on activated sludge model NO.2 (ASM2) with anaerobic/anoxic/aerobic (A2/O) technology is a nonlinear multi-input-multi-output (MIMO) system. It is difficult to directly use ASM2 for the control. In this paper, time-scale decomposition is used to reduce the WWTP. First we determine the time-scale property of different components of the WWTP with mathematics homotopy method, and then the components dynamics with fast mode and slow mode are reduced. The simulation demonstrates that the error between the reduced model and the original model is satisfied with seven differential equations are omitted for every tank.
Keywords :
MIMO systems; differential equations; nonlinear control systems; reduced order systems; wastewater treatment; activated sludge model NO.2; anaerobic-anoxic-aerobic technology; differential equations; mathematics homotopy method; model reduction; nonlinear multiinput-multioutput system; time-scale decomposition; wastewater treatment process; Aerodynamics; Biological system modeling; Mathematical model; Mathematics; Nitrogen; Nonlinear dynamical systems; Reduced order systems; Sludge treatment; Systems engineering and theory; Wastewater treatment; activated sludge model; mathematics homotopy method; time-scale decomposition;
Conference_Titel :
Natural Computation, 2008. ICNC '08. Fourth International Conference on
Conference_Location :
Jinan
Print_ISBN :
978-0-7695-3304-9
DOI :
10.1109/ICNC.2008.501
