Fuzzy logic based dissolved oxygen control for SBR wastewater treatment process

The wastewater treatment process is a kind of complex large-scale system, and also an energy intensive process. For the urban wastewater treatment plan, about 50 to 70 percent of the total power energy is consumed in the aeration stage, and meanwhile the actual control method for the aeration process usual simple and crude. So it is possible to reduce the running cost of the entire wastewater treatment system effectively by using more accuracy control method. A kind of fuzzy logic control method to control the aeration process of the urban wastewater treatment plant was presented in this paper. It can control the aeration process by regulating the oxygen transmission coefficient according to the dissolved oxygen index. Simulation results show its validity.