INTELLIGENT DECISION MAKING IN WASTEWATER TREATMENT PLANT SCADA SYSTEM

In this paper a SCADA system for a primary wastewater treatment control system with fuzzy controller is presented. As local controllers Programible Logical Controllers have been used, special attention has been dedicated to connection with SCADA. The main problem considered in this paper is the development of remote monitoring and controlling of systems for wastewater treatment and its improvement by adding a module for intelligent decision making. The usage of intelligent sensors and actuators, as well as the control of the dislocated facilities and transportation systems for wastewater treatment is discussed. Furthermore, a simplified system for web control is developed, which is an excellent basis for further improvement in order to develop a complete system of control and supervision of wastewater. The problem of communication between local controllers and central SCADA system, which is located in the dispatch center, was solved in several ways using modern wireless technologies. The developed intelligent module of SCADA application based on Sugeno type fuzzy algorithm makes decisions at a higher control level, while the local PLC controls the appropriate dislocated facilities. The PLC used in this work has no fuzzy module or software. The proposed fuzzy-SCADA system is flexible and applicable in other industrial applications and it is characterized by an optimal system performance and faulty safety.