Journal of Food, Agriculture and Environment

Vol 10, Issue 3&4,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Simulation and control of pasteurization process with inlet product temperature as disturbance


W. M. F. Wan Mokhtar *, F. S. Taip, N. Abdul Aziz, S. B. Mohd Noor

Recieved Date: 2012-06-27, Accepted Date: 2012-09-29


Effective operation of pasteurization process involves optimum control of pasteurized product temperature. However, the presence of disturbance directly change the pasteurized product temperature and consequently, the product may not be pasteurized properly and contains unwanted microorganisms. In this study, several proportional-integral-derivative (PID) tuned by different tuning methods were applied on the obtained disturbance model (inlet product temperature) and simulated using SIMULINK in order to determine the best control system. The empirical model of process used in simulation work was also developed. The model obtained can be represented by the first-order plus time delay (FOPTD) form with R2 more than 0.918. Simulation results revealed that the minimization of integral absolute error (IAE) tuning method is satisfactorily adaptable for disturbance rejection with faster settling time and good robustness, whereas, ideal PID outperforms the other PID structures with lower settling time (less than 2 min). Thus, this controller tuned by minimization of IAE tuning method was good control scheme in controlling pasteurization process. In conclusion, the results obtained are recommended as a suitable control strategy for the pasteurization process of pink guava puree in the industry. 


Pasteurization, process control, simulation, PID controller

Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Food and Health
Pages: 124-128

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