Adaptive Control of Bromelain Precipitation in a Fed-batch Stirred Tank
نویسندگان
چکیده
In this work, bromelain is recovered from triturated pineapple stem and rind (usually kitchen waste) through the precipitation process with alcohol at low temperature. The temperature control is crucial to avoid the irreversible protein denaturation and consequently improving the precipitation yield. The process is carried out in a fed-batch system, so that its dynamic nature poses challenging control system design. Conventional and adaptive controllers are properly designed and on-line implemented through a fieldbus digital control system. Closed loop performance was improved under adaptive PID controller. Overshoot and response time decreased and no control action saturation occurred. Copyright © 2002 IFAC.
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