Minimization of combined sewer overflows using fuzzy logic control

The use of fuzzy logic control in minimizing the combined sewer overflows (CSOs) for a small but representative section of the Seattle Metro collection system is discussed. Combined sewers carry both sanitary sewage and storm runoff. The problem considered is the real-time control of the CSOs, which consist of about 160 km of interconnected pipes ranging from 0.3 m to 3.6 m in diameter. A fuzzy logic controller has been designed for a three-reservoir subsystem representing the most common connection in the combined sewer systems. This application of fuzzy logic control on the three-reservoir system suggests that ii is quite promising for online control and minimization of CSOs