AO脱氮工艺影响因素及其控制策略的研究彭永臻

37　820058　　　　　　　　　JOURNALOFHARBININSTITUTEOFTECHNOLOGY　Vol.37No.8Aug.2005　　　　　　A/O彭永臻1,2,王晓莲2,王淑莹2(1.,150090,E-mail:[e-mail];2.,100022)　:为有效提高A/O工艺脱氮效率,以淀粉废水为研究对象,系统考察了DO、硝化液回流量、污泥回流量、SRT、进水COD与TN质量质量浓度比和HRT等因素对脱氮效率的影响,并建立了相应的控制策略,如以出水氨氮质量浓度来控制好氧区DO值,以缺氧区硝酸氮质量浓度来控制内循环回流量,以进水COD与TN质量质量浓度比或出水总氮质量浓度来控制外碳源投量.最后根据上述分析建立了A/O工艺硝化与反硝化反应专家控制系统.:A/O脱氮工艺;淀粉废水;硝化反硝化:X506:A:0367-6234(2005)08-1053-05StudyoninfluencefactorsandcontrolstrategiesofA/OnitrogenremovalprocessPENGYong-zhen1,2,WANGXiao-lian2,WANGShu-ying2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China,E-mail:[e-mail];2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:HowtoeffectivelyimproveA/Oprocessnitrogenremovalefficiencyisalwaysaconcernedproblem.Nitrogenremovalinfluencefactors:DO,internalrecirculaitonflowrate,sludgerecycleflowrate,SRT,influ-entCOD/TNandHRT,wereclearlystudiedusingstarchwastewater,andcorrespondingcontrolstrategieswereestablished,suchas,usingeffluentammoniaconcentrationcontrolDO;usingnitrateconcentrationattheendofanoxiczonecontrolinternalrecirculationflowrate;usinginfluentCOD/TNoreffluenttotalnitrogenconcentrationcontrolexternalcarbondoserate.Basedontheaboveanalysis,improvingA/Onitrificationanddenitrificationrateexpertcontrolsystemwasestablished.Keywords:A/Onitrogenremovalprocess;starchwastewater;nitrificationanddenitrification:2003-11-21.:(2003AA601010);(KZ200310005003);.:(1949-),,,,.　　,:①,;②DO,DO;③,,;④,.A/O,,A/O50%～70%,[1],A/O,,.1　材料与方法1.1　,1.6(48L),2,4,(20L).、,21±1℃,:144L/d,HRT8h,SRT12～13d,MLSS2500±200mg/L,360mg/L,DO2mg/L,0.8,2.5,COD、BOD350mg/L、200mg/L55mg/L.DO、、、SRT、CODTNHRT.1　A/O1.2　,COD,NaHCO3pH6.5～8.(g/L):(0.2～0.6),(0.1～0.30),KH2PO4(0.02～0.033),NaHCO3(0.05～0.15),MgSO47H2O(0.09),CaCl22H2O(0.03),Fe-SO42H2O(0.003).,COD、NH4--N、NO3--N、NO2--N、PO4--P、pH、、DO、ORP、MLSS,.DOWTW-300i,pHORPHANNA.2　结果与分析2.1　DO2,DO,,DO1.5mg/L,3mg/L,94.5%,0.057mg/(mgMLSSd),.DO,,,;DO,DO,.,,[2].　　DO2.0mg/L,2DO1.5mg/L,GB18918-2002,25%,DO.A/ODO:DO,,,DO,;,DO,.2　DO、2.2　R3、.1.75,,,RRNRN=R/(R+1).、,,DO,DO,DO,,,DO.,,,,.,:1054　　　　　　　　　　　　　　　　　　　　　37　2～3mg/L,,,.3　、2.3　r4、,0.4,,,0.6,3.2mg/L,94.2%,75%,r,、,.,A/Or60%～100%,40%.4　、2.4　SRT5SRT、,SRT8d,,SRT,、,.,SRT,,A/OSRT8～12d,,,,,,.2.5　CODTNCOD,CODTN,6CODTN、.6,CODTN,,,,CODTN4,50%,,BOD,80%,ρ(COD)/ρ(TN)8.,0.05kg/(kgMLSSd),.,0.05kg/(kgMLSSd).CODTN,CODTN310,0.103kg/(kgMLSSd)0.042kg/(kgMLSSd).5　SRT、6　CODTN、　　,CODTN,,CODTN,,.CODTN,A/O,,[4],,:10558,:A/O,,,,,.2.6　7HRT、,HRT4h,,54.5%,,.HRT8h,,1.86mg/L,96.6%,74.54%.,HRT,,,.A/OHRT8h,HRT2.6h5.4h.,,,:GB18918-2002,,,DO,,,,;,100%,0,(,),,,,,.7　HRT、3　A/O工艺硝化反硝化专家系统,,[5],,(8),、,.A/O1mg/L,5mg/L;2mg/L(,,),10mg/L,15mg/L..　　:①,,DO.②,,.,,.③,,,,,.④,.,,;.⑤,.⑥,,.⑦,,.⑧,,.⑨DO,,.:①2mg/L,,,2mg/L.②,,.③,,,,1056　　　　　　　　　　　　　　　　　　　　　37　DO.④,,,,.⑤,,,,.⑥,,,,.8　A/O4　结　论A/O,,.参考文献:[1]OISSONG,NEWELLB.WastewaterTreatmentSystem:Modeling,DiagnosisandControl[M].London:IWAPublishing,1999.[2]KALKERTJ.Fuzzycontrolofaerationinanactivatedsludgewastewatertreatmentplant:Design,simulationandevaluation[J].WatSciTech,1999,39(4):71-78.[3]ZHIGUOY,ADRIANO,INGLLDSENP.Controlofni-traterecirculationflowinpredenitrificationsystems[J].WatSciTech,2002,45(4-5):29-36.[4]ZHIGUOY,HERWIGB.Controlofexternalcarbonad-ditiontopredenitrfyingsystems[J].JournalofEnviron-mentalEngineering,1997,123(11):1080-1086.[5]MANESISSA.Intelligentcontrolofwastewatertreatmentplants[J].ArtificialIntelligenceinEngineering,1998,12:275-281.(　刘　彤)10578,:A/O