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The sludge produced by treating the urban sewage needs thickening and dewatering and it is important to reduce the quantity of discharging sludge by controlling dewatering ratio in the process of sludge thickening and dewatering. In this paper, the fuzzy adaptive PID control algorithm is designed to replace the common PID control to be used to control dewatering ratio in sludge process. The results of the simulation show that the method is effective in improving the control of the dewatering ratio in sludge process

Research on Controlling Dewatering Ratio Based on Fuzzy PID in Sludge Process