APPLICATION OF FUZZY CONTROLS IN SEWAGE TREATMENT

模糊控制在污水处理中的应用APPLICATIONOFFUZZYCONTROLSINSEWAGETREATMENTWEI-LUZHU,HUI-QIONGDENG,SHUAIWANGCollegeofElectricalEngineering,HebeiUniversityofScienceandTechnology,Shijiazhuang050018,ChinaE-MAIL:zhuwl1888@126.com,denghuiqiong66@126.com,wangshuai0103@yahoo.cnAbstract:Fortheshortagesofthetraditionalflowprogramcontrolandtimeprogramcontrolintheprocessofsewagetreatment,thispaperadoptsaFuzzyprogrammingmethodbasedonPLC.ThePLCanditsgeneralI/OmoduleareinvolvedinformingtheModuleControllerinhardware.WeusetheDOandthesludgerefluxratioasthemaincontrolparameters,andinferthebestcontrolvariablesbyPLCdiscretecalculationandlook-uptableonline.Notonlycanweensurethequalityofpurifiedwater,butalsosaveenergybyusingthisfuzzycontrollerintheprocessofsewagetreatment.Keywords:SewageTreatment;ProgramControl;FuzzyControl;DO;Sludgerefluxratio1.IntroductionBiologicalSewageTreatmentSystemisacomplexdynamicsystem,whichregardsmicrobetreatmentascorpusandhasmultipleinputsandoutputs.Ithasseveralcontroltasks,suchaswaterquality,BNR,p