SBR污水处理工艺的模糊控制

上海交通大学硕士学位论文SBR污水处理工艺的模糊控制姓名：李骏申请学位级别：硕士专业：机械电子工程指导教师：冯正进2003.2.1SBRSBRSBRSBRSBRSBRSBRSBRSBRSBRSBRSBRDODOMATLABSBRInordertoprotectthelimitedfreshwaterresourceofourcountry,weshoulddeveloptheworkofsewagewatertreatment.Sequencingbatchreactorprocessisoneofadvancedsewagewatertreatmentprocessesanditsuitstheconditionsofourcountry.ButthekeyofapplyingtheSBRprocessisitsautomationsystemwhichstillhasalotofunsolvedproblems.Sotheresearchofauto-controlofSBRprocessisveryimportant.Theprocessoftreatingthesewagewaterisverycomplexprocesswhichhascharactersofrandomicity,couplingandchangeswithtime.Thetraditioncontrolwaycan'tbeappliedintheprocessduetothelackoftheaccuratemathmodeloftheprocessandthesensorswhichcanreflectprocessparametersdirectly.ThepaperappliesthefuzzycontrolwhichisoneofintelligencecontrolmethodstoSBRprocessofsewagewatertreatmenttoimprovetheefficiencyanddecreasetheconsumeofenergy.Thepaperanalysestheparameterswhichaffecttheprocessoftreatmentandespeciallyputforwardtherelationshipbetweentheorganicdegradationanddoconcentration.ThenusetherelationshiptodesigntwofuzzycontrollerstocontroltheprocessandthetimeofaeratecourseSBRtreatment.ThecontrolmethodhasbeensimulatedinMatlab.ThefuzzycontrolarithmetichasbeenprogrammedandintegratedintheconfiguresoftwarewhichisWinCCproducedbySIEMENStobeappliedintheprojectofautomationsystemofHaiNingcitysewagewatertreatmentproject.SBR,FuzzyControl,sewagewatertreatment,DO12.823001216684001182300580001051%90%32713042%50%200133.2%m31500~200055555624%63.5%2A-BA-OA-A-OSBRA-BA-OA-A-OA-BA-OA-A-OSequencingBatchReactorActivatedSludgeProcess)SBR3SBRSBRSBRSBR15SBRICEASSBRCOD1999178SBR-CAST10/14.1km12km51.38SBR-CASTSBRSCADASupervisorControlAndDataAcquisition4SBR1)SBR242)3)PHDOCODSSORP4)“PLC”“”“”PLC5)6)1)52)3)4)5)6)7)SBR18SBRSBRPID6SBRSBRSBRSBRSBRSBRSBRDODOMATLABWinCCSBR71)2)3)1SBR82PHBOD5CODTODTOC13~4mg/LO2BOD5BOD51002020BOD2020205BODBOD5BOD2070~80%90~95%CODCODcrCODTOD2“”NH3NH4+NH3SBR90.2~2.0mg(NH3)/L——PO43-HPO42-H2PO4-——P2O74-P3O105-HP3O92-(PO3)63-34SBR1914ArdernLocket70NatreDameR.IrvineSBR1980EPACulwerSBRSBRSBRSBRSBR10SBRFillAerateSettleDischargeIdle2-112BODFig.2-1thePhasesofSBRTreatmentSBR11,;BOD3SBRSBR1/320%~25%5SRBSBR30%4SBRSBRSBR5MLSS8000~20000mg/L4~10F/MSBRSBR12115~40BODCOD2CO2H2O3H2CO2H2CO2CH4SBR134NH3RCHNH2COOH+O2RCOOH+CO2+NH3NH4++3/2O2NO2-+H2O+2H+-2FNO2-+1/2O2NO3--FSBR5141965L.A.ZadehFuzzySet196819731974E.H.Mamdani1)2)3)15901590159016173-13-11)PLC2)A/DD/A3)4)CR+A/DD/AFig.3-1theStructureofFuzzyControl18PDE[-e+e]e{}nnnnX,1,,1,-+--=ΛΛn0~en67XeKenKeΔ=eKeX()()⎪⎪⎪⎩⎪⎪⎪⎨⎧≥--≤++≤≤++≤≤neneKneneKentteKtentteKtiieiieiieiie,,1t,121t,21unuKuΔ=[]uu,-n33PB19PMPSONSNMNB7132~10PBPMPSONSNMNBPONO78()xmn=61()61+=⇔=xxPBm()41+=⇔=xxPMm()21+=⇔=xxPSm()010+=⇔=xxPm()010-=⇔=xxNm()21-=⇔=xxNSm()41-=⇔=xxNMm()61-=⇔=xxNBm()2⎟⎠⎞⎜⎝⎛--=baxexmBP~~MP~~SP~~0~~P0~~NSN~~MN~~BN~~a+6+4+2+0-0-2-4-6b20EECUPBPMBP~~MP~~1ABIfAThenB2ABCIfAThenBElseC3ABCIfAANDBThenC1IfAThenBABabRabο=BAR×=()()()[]yxyxBARmmm,min,=2IfAThenBElseCABCabcRab′=οRac′′=ο21()BAR×=′()CAR×=′′()()()[]yxyxBARmmm,min,=′()()()[]yxyxCARmmm,min,=′′RRR′′∪′=3IfAANDBThenCA0xxE-=BdtdEEC=UE1EC1,U1E2EC2,U2E3EC3,U3iR()UECERTiο×=si,,2,1ΛΛ=sΥsiiRR1==()RCEEUο×=REECU12223()nixi,,2,1Λ=,1~U()iUx1~m()()nixxiUi,,2,11~Λ=m()∑=niiUixx1~1m()∑iUx1~m0x0x1~U0x()xU1~mxU0x1u3SBR23SBR()SBRSBRSBR191480SBRSBRSBRSBRSBRSBRSBR24SBRSBRSBRSBRSBRPIDSBRIAWQASM1activatedsludgemodleNo.1ASM2activatedsludgemodleNo.2ASM3activatedsludgemodleNo.3ASM219192242IAWQASMSBR25FuzzyControlSBR1)SBR2)3)4)SBR5)6)SBRSBRSBR26SBR1DOSBR2mg/L215~30106~73PHPH6.5~8.5PH4.5PH9.0PHPHPHPHPHSBR27490~97%3~10%50%5H2S1+100~-100mV-150~-400mV-330mV220~253PHPHPH6.8~7.2PH6.58.2PH45SBR2811mg/LH+PHPHPHPHPH8.0~8.4BOD515~20mg/LBOD20~30155NH4-NNOX--N2PH6.5~7.5PH8620~30150.5mg/L5~30PH6~8BOD5CODBODSBR29BODCODCODBODBOD55CODCOD4SBRDOORPPHSSSBRSBR-CASTSBRPHOPRSBR-CASTDOPHORP,SS,CODSSSBRPHSBR30DO31SBRSBR30DO5-1DODODODODOFig.5-1theVariationofDOwithtimeunderthesymmetricalaerationrate32SBRSBRDOSBRSBRMLSSCODDOCOD1DOCODSBR,COD5-21DOSBRDOFig.5-2theVariationofDOandCODwithtimeunderthedifferentaerationrate——--DO(AR=1200L/h)—×DO(AR=1000L/h)—DO(AR=1100L/h)—DO(AR=900L/h)—33DO2CODDO“DO”DODOCODDODO3CODDODO5.56.8mg/LDOCODSBR8-10DODODODODODODODODODO1-2mg/LDODO2mg/LDODO1.5mg/LDODODO2MLSSDOCODFig.5-3theVariationofDOwithtimeundertheinitialMLSSof2690mg/L345-3SBRMLSS2000mg/LMLSS2690mg/LDOCODMLSSDOSBRSS3CODDOCOD5-4DOCODCODDOCOD10DOCODDODODOMLSSCODDODOCODDODO5-4CODDOCODFig.5-4theVariationofDOwithtimeunderthedifferentinitialCOD——DO(COD=230mg/L)—DO(COD=490mg/L)—×DO(COD=650mg/L)—35DODOSBRDODODODOSBRDODODODO5-5PD1CODSBR10DOmDORuU~CE~~E~ye&ed/dtFuzzyFuzzyFuzzyFuzzy5-5Fig.5-5theSystemStructureofFuzzyControllerwithdoulbeinputsandsingleoutput36DOsDODOE()ΛΛ3,2,1=-=iDODOEsmiiii2ECE()ΛΛ3,2,11=-=-iEECEiii1-iEi-1DO2USBRiUΔii1EDOERe=[]ee+-,EXe={-6-5-4-3-2-10+1+2+3+4+5+6}Eeke6=ek[]()eeeReXnken∈′∈×′=,ePBPMPSPZNZNSNMNBeXBNBP~~,,~~Λ()xmeX()()222baxex--=m37PZNZa1b1a2b2a1b1a2b2PBa=6b=1PMa=4b=1PSa=2b=1PZa1=0b1=1a2=0.0001b2=0.0001NZa1=0.0001b1=0.0001a2=0b2=1NSa=-2b=1NMa=-4b=1NBa=-6b=1