Control performance is evaluated through a real-time implementation to track the desired pH target in comparison with a two-degree-of-freedom control scheme used as a compared case. The model is then used in the I/O feedback formulation. The first principles approach is employed for reactor modeling. To solve the problem, an input/output (I/O) linearization is applied because it provides excellent the setpoint trackability with a few numbers of tuning parameters required. Under a fed-batch operation mode, the reactor behavior has unstable dynamics resulting in a difficulty to achieve the pH target by manipulating the basic influent feed rate. A reactor pH is an important factor to enhance the gas absorption of carbon dioxide bubbles in an alkaline wastewater, and it needs to operate within a tight pH range. Carbon dioxide utilization, I/O feedback, eco pH regulation, physical model, CO2 for pH treatment, fed-batch operation AbstractĪ model-based application for pH regulation in a pilot unit of wastewater treatment by carbon dioxide gas is presented.
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