Fractional Order Control for Aeration of Activated Sludge Wastewater Treatment Processes

Abstract

Abstract. In this paper, the design scheme of fractional order proportional integral (FOPI) controller for the second order plus time delay model of aeration of activated sludge wastewater treatment process are presented. It is found that the two controllers designed by the proposed tuning method not only make the system stable, but also improve the performance for the aeration control of activated sludge wastewater treatment processes. Simulation results are presented to validate the proposed tuning schemes. Furthermore, from the simulation results, it can be seen that the fractional order PI controller outperforms the integer order PID controller.

Integrated Intelligent Supervisory Controller with Fractional Controller Design for Plant-wide Wastewater Treatment Plants

“…Barbu and Ceanga (2015) used feedback theory to design a robust non-integer order controller for urban systems. Using FO controls, Meng et al, (2017) examined the effectiveness of aeration in an activated sludge-based WWTP. Tejaswini et al, (2020) developed FO controllers for a WWTP using an integer order plant model, which they then integrated with a two-level hierarchical adaptive control framework.…”

“…For the same FOM model, the fractional proportional integral (FPI) controller is used. FPID parameters can be developed by tuning certain parameters, such as controller gain (K C ), integral time constant (T i ), and fractional order (β)(Meng et al, 2016). Table2Control application, FOTF model, fractional controllers of control schemes are reported.…”