Dynamical Modeling for Improvement of Water Treatment System using Bond Graph Method

Ehsan Hadizadeh and Kourosh H. Shirazi


Water treatment, dynamic modeling, the bond graph method, optimization on energy consumption, purified water


Water treatment systems (WTS) play an important role in providing drinking water to cities. They are mainly composed of mechanical, hydraulic, chemical, and electrical subsystems. The purpose of this work is to evaluate and improve the performance of a real WTS based on its dynamical model. The bond graph method is utilized to derive the dynamical model of the WTS. The periodical backwashing process of the filters and empirical relation between the required coagulation material and turbidity of raw water in the chemical unit are considered. The electrical energy consumption and hydraulic waste in the circuits are evaluated through the established dynamic model. It is shown that by modifying the outlet pipeline design and employing an adaptive timing in the clarifier unit, the energy consumption as well as the hydraulic wastes can be reduced significantly.

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