WASTE-WATER NEUTRALIZATION CONTROL-BASED IN FUZZY-LOGIC - SIMULATION RESULTS

Neutralization is a technique widely used as a part of wastewater trea tment processes. Due to the importance of this technique, extensive st udy has been devoted to its control. However, industrial wastewater ne utralization control is a procedure with a lot of problems-nonlinearit y of the titration curve, variable buffering, changes in loading-and d espite the efforts devoted to this subject, the problem has not been t otally solved. In this paper, the authors present the development of a controller based in fuzzy logic (FLC). In order to study its efective ness, it has been compared, by simulation, with other advanced control lers (using identification techniques and adaptive control algorithms using reference models) when faced with various types of wastewater wi th different buffer capacity or when changes in the concentration of t he acid present in the wastewater take place. Results obtained show th at FLC could be considered as a powerful alternative for wastewater ne utralization processes.