Modeling and comparative study of PID Ziegler Nichols (ZN) and Cohen-Coon (CC) tuning method for Multi-tube aluminum sulphate water filter (MTAS)

Floods are a natural phenomenon that frequently occur in Malaysia. Flooding will cause water to become cloudy or turbid. In this situation, the supply of clean drinking water is the most affected component. Therefore, many researchers have designed a water filter system to overcome these problems. One of them is used chemical as purifying agen, or known as coaguland and flocculation process. In this study researcher used Aluminium Sulphate Al 2 (SO 4 ) 3 as a coagulant agent, and Multi-tube aluminum sulphate water filter (MTAS) pilot plan as flocculation process. Thus, the MTAS pilot plan will be control by open loop controller and a discrete plan modelling transfer function be developed in light of, the open loop controller output. Subsequently, PID simulation controller be implemented based on Ziegler Nichols (ZN) and Cohen-Coon (CC) tuning method. Conclusively, the robusness and efficiencies of PID controller is evaluated, and a comparative study has done. Finally, researcher proposed the best PID tunning controller that will be adopted in real time process control for further investigation.