Research On Fuzzy Control System For COD Of Wastewater Treatment

This paper introduces the development process of wastewater disposal. It was emphasized that the low lever of automatization of the civil wastewater treatment and problem faced. According to analyzing the characteristic of wastewater treatment system,the method of fuzzy control is applied in wastewater treatment because its process isn't denoted by precise mathematic model.In this paper,a fuzzy controller of two inputs and one output is designed to meet the COD online controlling of wastewater treatment. The design of fuzzy controller is consisted by fuzzification of inputs,making fuzzy control rules and defuzzification. The key of fuzzy controller design is the off-line calculation of fuzzy control table. So,the fuzzy control table is gotten by MATLAB software. Fuzzy inference system toolbox for MATLAB also validates the veracity of table. Then,anticipative results are attained by design and simulation of hardware circuit.Fuzzy control system for COD of wastewater treatment commendably solves the problem that the mathematic model is difficult to obtain in wastewater treatment,which offers a practical approach for COD concentration automatic control in the treatment of wastewater. Control request is met by off-line achievement of fuzzy control table,which can be modified conveniently according to object controlled and experiment results.