FUZZY CONTROL FOR AN ANAEROBIC DIGESTER

A fluidized bed reactor was used for the anaerobic digestion of wine d istillery wastewater and the capability of fuzzy logic to control this process was demonstrated. The output gas flow rate and the pH in the liquid phase were used as input parameters of the control and the inpu t how rate was used as the control variable. The controller was evalua ted on a quantitative model, and on a real process. The results obtain ed on the process are as good as those obtained with the model. The ea siness of the tuning and the possibility of evolution of the controlle r make it suitable for such processes. Copyright (C) 1997 Elsevier Sci ence Ltd.