An approach to control of bioreactors. Application of the gain-scheduling method

A control system based on a combination of the gain-scheduling control meth od and an adaptive PID controller was designed for the production of xylose from hardwood hemicellulose using a stirring tank reactor. Different opera ting conditions have been considered for estimating the adjustable paramete r (theta) to take into account the changes of energy of the system. The per formance of the control system was studied first by numerical simulation, a nd after implementation in the stirred tank reactor where the controller ac tually works.