Fault detection in a wastewater treatment plant

The wastewater treatment plants are very unstable and the waters to be treated are ill defined. The command of those processes needs to be done with advanced methods of control and supervision. Those methods have to take into account the bad knowledge of the processes. The most important situations that can imply problems for the plant are listed. The parameters that allow the comparison between the crisis situation and normal one are measured. The fuzzy logic method is used to distinguish the different situations in order to take a decision for the working of the plant. The method is tested in simulation and on a real plant.