Design A PID Controller For An Activated Sludge Process

Muhamad Afiq, Bachok (2013) Design A PID Controller For An Activated Sludge Process. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Activated sludge process is a process of aerobic wastewater treatment. This process is used to reduce the amount of dissolved organic matter from the wastewater by using the microorganism in aeration tank. The water that has been produced after the process can be used again without effecting or damaging the environment to avoid pollution. The main objective of this project is to design the PID controller for the plant to control the substrate concentration and dissolved oxygen concentration contained in the water. Besides that, the performance of the controller also will be analysed to make the process of the system better. This project covered the design of the PID controller based on the non-linear equation obtained from the online system. The result will be analysed and the controller will be redesign to meet the specification of the performance. The non-linear equation must obtain first from the online system. Then the equation will go through linearization process to get the linear equation before design the controller. The controller design process will be repeated based on the performance result of the controller. The performance that has been considered was settling time, percent overshoot and steady-state error.

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