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4282487-2493Vol.42,No.8:2487-24932016831HighVoltageEngineeringAugust31,2016DOI:10.13336/j.1003-6520.hve.20160812005孙明，杜审言，徐海洋，朱志鹏（上海海事大学静电研究所，上海200135）(TiO2)TiO2−TiO231kV50Hz80mL/minTiO21.0cm10min99.88%TiO2−InactivationofE.coliinMultiphaseNanosecondPulsedDischargeCooperativeTiO2SystemSUNMing,DUShenyan,XUHaiyang,ZHUZhipeng(InstituteofElectrostatics,ShanghaiMaritimeUniversity,Shanghai200135,China)AbstractStrongoxidizingactivespecies,shockwave,ultraviolet-lightandstrongelectricfieldinmultiphasenanosecondpulsedischargecooperativetitaniumdioxidesystemcanbeeffectivelyappliedtoinactivatemicroorganisminthesewagebaseonprojectstudyofballastwatertreatmenttechnology.Weobtainedlow-temperatureplasmathroughmultiphasena-nosecondpulseddischargesandcombinedwithphoto-catalysisTiO2,conductinactivationexperimentswithE.coliasthetarget.Effectsofthepeakvoltageandrepetitionfrequencyofpulses,theventilationgasvolumeflowrate,thelengthoftheTiO2coatingfilm,thedischargetreatmenttimeandE.coliinitialconcentrationontheE.coliinactivationwereinvesti-gatedwithanozzle-cylinderelectrode.TheresultsshowthattheinactivationrateofE.colireached99.88%whentheparametersweresettobepulsepeakvoltageof31kV,pulserepetitionfrequencyof50Hz,ventilationgasflowrateof80mL/min,TiO2coatinglengthof1.0cmanddischargetreatmenttimeof10min.Withpeakvoltage,pulserepetitionfre-quencyanddischargetreatmenttimeincreasing,thesurplusofE.colireduced,butitincreasedwithE.coliinitialconcentration.Withtheriseofventilationgasvolumeflowrate,thesurplusofE.colireducedfirstly,andthenincreased,meanwhileitcouldkeepthesurplusofE.colireducedfirstly,andthenunchangedwithaddcoatinglengthoftheTiO2.Keywordsdischargeplasma;nozzle-cylinderreactor;E.coli;inactivation;TiO2;pulseddischarge01(51207089)(2015ycx012)ProjectsupportedbyNationalNaturalScienceFoundationofChina(51207089),GraduateInnovationFundofShanghaiMaritimeUniversity(2015ycx012).[1]20[2-4][5-6]24882016,42(8)[7]•OH•O•HO3H2O2[8-12]199845kV/cm401%[13]2002203040kV/cm[14]30s2.5%~10%2011101520253035kV/cm[15]20kV/cm200μsTiO2TiO2TiO2TiO2–[16]TiO2[17]TiO2[18]TiO2[19]TiO2TiO2[20]TiO2•OHO3H2O2[21]–TiO2TiO211.11−[22]19.5cm10cm1.8mm20cm1cmTiO210cm[23]P60D−0~60kV0~120Hz0~500ns0~200ns36nF2.4nF2489(P6015ATektronix)(TDS4014CTektronix)(TCP305Tektronix)(TCP300Tektronix)(TDS3014CTektronix)2[24]1.2331kV50Hz321kV28A2CMCC(B)441023724h3343724h6000r/min10min4.4×106CFU/mL400mL2.0cm31kV50HzNaOHHClpH2[25]μ=(C0–C)/C0(1)C0C1—2—3—4—561Fig.1High-voltagepulsedreactor1234562Fig.2Schematicofexperimentapparatus3Fig.3Waveformsofdischargevoltageandcurrent2.122~34kV50Hz80mL/minTiO21.0cm24902016,42(8)2.0cm10min442.220~60Hz31kV80mL/minTiO21.0cm2.0cm10min55O3H2O22.360~100mL/min31kV50HzTiO21.0cm2.0cm10min6680mL/min80mL/minOHOH2OO380mL/min4Fig.4EffectsofpositivepulsepeakvoltagevalueoninactivatedE.coli5Fig.5EffectsofpulserepetitionfrequencyoninactivatedE.coli6Fig.6EffectsofventilationgasvolumeflowrateoninactivatedE.coli2.44~12min31kV50Hz80mL/minTiO21.0cm2.0cm772491O3H2O22.5107106105104103CFU/mL31kV50Hz80mL/minTiO21.0cm2.0cm10min882223(OHHOOHOO)2.6TiO2TiO20.51.01.5cm31kV50Hz80mL/min10min99TiO29TiO20.5cm1.0cmTiO2OH−H2O•OHTiO2TiO2TiO2TiO2TiO2317Fig.7EffectsofdischargeprocessingtimeoninactivatedE.coli8Fig.8EffectsofdischargeprocessingtimeoninactivatedE.coli9TiO2Fig.9EffectsofTiO2coatinglengthofinactivatedE.coliTiO2231kV50Hz80mL/minTiO21.0cm10min24922016,42(8)99.88%−TiO2References[1].[D].2007.LIUFang.Experimentalstudyofcoronadischargeplasmasteriliza-tion[D].Guangzhou,China:GuangdongUniversityofTechnology,2007.[2]LukesP,ClupekM,SunkaP,etal.Degradationofphenolbyun-der-waterpulsedcoronadischargeincombinationwithTiO2photocatalysis[J].ResearchonChemicalIntermediates,2005,31(4/6):285-294.[3].[D].2007.HAOXiaolong.Studyofhigh-voltagepulsedplasmadischargetech-nologycatalyticdegradationoforganicpollutants[D].Hangzhou,China:ZhejiangUniversity,2007.[4]ClementsJS,SatoM,DavisRH.Preliminaryinvestigationofpre-breakdownphenomenaandchemicalreactionsusingapulsedhigh-voltagedischargeinwater[J].IEEETransactionsonIndustryAp-plications,1987,23(2):224-235.[5].[J].201541(8)2550-2561.BAOJiali.Healtheffectsofextremelylowfrequencyelectromagneticfields[J].HighVoltageEngineering,2015,41(8):2550-2561.[6].[J].201541(8)2625-2634.QUMin,BIZhuoyue,TANGYumeng,etal.Applicationofbio-electromagnetictechniqueanditsrelatedhealthriskassessmentstrategy[J].HighVoltageEngineering,2015,41(8):2625-2634.[7].[D].2012.ZHENGJiabo.Theoreticalandexperimentalstudyoftheeffectsofhigh-voltagepulsesterilization[D].Chongqing,China:ChongqingUniversity,2012.[8].[D].20073-6.LINan.Investigationongas-phasedischargeplasmareactorsforde-compositionoforganiccompoundsinwater[D].Dalian,China:DalianUniversityofTechnology,2007:3-6.[9]JinXL,BaiH,WangF,etal.Plasmadegradationofacidorange7withcontactglowdischargeelectrolysis[J].PlasmaScience,2011,39(4):1099-1103.[10]QuGZ,LiJ,WuY,etal.Regenerationofacidorange7-exhaustedgranularactivatedcarbonwithdielectricbarrierdischargeplasma[J].ChemicalEngineeringJournal,2009,146(1):168-173.[11].[J].201329(1)56-60.WANGYu,JINXing