Automatic Control System For Sewage Treatment Research

At present,the environmental problems of the constraints become an important factor in sustainable development,especially the water environment pollution,seriously affecting people's physical and mental health,speed up the shortage of water resources. As we all know,a serious shortage of water resources in China is the world's one of 13 water-scarce countries,how effective recycling of water resources has become an important issue in society.In this way,the sewage treatment system is particularly important.China Sewage Treatment emerging new technology and the introduction of foreign technology-driven.At the same time,with the development of automation technology, advances in programmable logic controller,PLC programmable logic controller to the sewage treatment system as the control system has been widely used.In this paper,the use of PLC as a controller based on fieldbus and industrial Ethernet control technology into the sewage treatment system.The article in accordance with the actual sewage treatment plant,the choice of the oxidation ditch sewage treatment process,using the Siemens Profibus-DP fieldbus and industrial Ethernet networks to form.And the detailed design of the hardware and software design,In this paper,the target selection algorithm Chamber of aeration the oxygen content of the sewage system,using fuzzy control and PI control of a combination of methods, put forward concrete solutions.And the use of Matlab's Simulink tool,the control of the oxygen content of the sewage system simulation,simulation results show that the program has good results and feasibility.