Online identification and control of pH in a neutralization system

Date

2008-07-02

Author

Obut, Salih
Özgen, Canan

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pH control of a neutralization system for wastewater, where the input waste stream has variable properties in terms of acid concentration and flow rate, is investigated with different control algorithms utilizing an online identification technique. Performances of the designed controllers (model predictive (MPC), fuzzy logic (FLC), and conventional PI controller) are tested and compared mainly for disturbance rejection, set-point tracking, and robustness issues theoretically and experimentally on a laboratory-scale pH neutralization system. Additional experiments are done with original wastewater samples taken from an electronic-circuits manufacturing plant. All controllers' performances are found to be close, while adaptive MPC can be considered better compared to others due its constraint handling capabilities and FLC can be preferred because it can be used without an identification step.

Subject Keywords

Reactor, Fuzzy-Logic, Nonlinear Control, Strong Acid Equivalent, Model-Predictive Control

URI

https://hdl.handle.net/11511/32150

Collections

Graduate School of Natural and Applied Sciences, Article