ClO2三相催化氧化处理硝基苯生产废水的试验林鑫海

:,,1964,,、。ClO2三相催化氧化处理硝基苯生产废水的试验林鑫海1任炜冬2范　波2王学海2(1.,315200;2.,315200)　　(NB)NB,,。ClO2NB。,280、350mgClO2,56min,NB95%,COD90%。10.5。　　Catalyticoxidationfortreatmentofnitrobenzenemanufacturingwastewater　LinXinhai1,RenWeidong2,FanBo2,WangXuehai2.(1.NingboZhenhaiEnvironmentalProtectionBureau,NingboZhejiang315200;2.NingboHailiChemicalCo.Ltd.,NingboZhejiang315200)Abstract:　Toxicnitrobenzeneanditsderivativeswerepresentinthewastewaterofanitrobenzenemanufactur-ingplantanditsbiotreatedeffluent.Seriesofexperimentswereconductedtoevaluateeffectivenessofthree-phasecat-alyticoxidation,employingonsiteproducedClO2(fromequalvolumeof8.3%NaClO2and10.3%HClsolutions),inapilotscaletowerfilledwithCu-coatedactivatedcarbon(servingbothasanadsorbentandacatalyst)fortreatmentofboththewastewaterandthebiotreatedeffluent.Operatingatanemptybedresidencetimeof50minutesandusingaClO2doseof350mg/L,thecatalyticoxidationtreatmentaccomplishedexcellentremovalofCOD,nitrobenzeneandcolor(90%,95%and95%,respectively).Theestimatedcostfortreatingthewastewater(COD=1000mg/L,nitrobenzene=130mg/L)wasaboutRMB¥10.5/m3.Keywords:　ChlorinedioxideNitrobenzeneCatalyticoxidationWastewatertreatment　　(NB),,。,、[1,2],,NB,。NB,Fe2+、,。　　(NB)[3]。,。[4]12、[5](DSA)NB,,NB。[6]、[7]23NB,。[8]NB,pH10,NB83%。,[9],[10]282、O3[11]、-[12]、[13]、[14]、[15]NB。　　ClO2NB,。ClO2,2.9g/L。1。1　1)(%)Table1　ThecomparisonsofoxidecapacityofoxidantsClO2H2O2NaClO2KMnO4Cl2NaClO26320915711110093　　:1)Cl2100%。11.1试验装置与材料　　1。8.3%()NaClO210.3%()HCl1∶1()JSN-PWClO2208　　29　3　20073DOI:牨牥牨牭牴牳牭牤jcnki牨牥牥牨牫牳牰牭牪牥牥牱牥牫牥牨牬ClO2。GSC01,。NBNB,:NB(),COD900～1100mg/L,NB90～150mg/L,1000～4000;NB(),COD150～350mg/L,NB11～13mg/L,130～200。1　Fig.1　Chartofexperimentalflow1—;2—;3—;4—ClO2;5—NaClO2;6—HCl;7—;8—1.2试验方法　　,NB,,,ClO2,(),;,,“”;7～8min,35～100min。800、400L/h。1.3测试方法　　CODTOC-4100,TOC-COD;NB—[16];;pHpH;ClO2。2ClO2　　ClO2。ClO2,NB。,O2,ClO2、O2、H2O(HO),H,H,。,—NO2—NH2,,,[17,18]。—NO2—NH2HNO3N2,Cl(Ⅳ)Cl-。　　,ClO2NB,,,,。,,,。33.1　ClO2对NB的去除效果　　ClO2NB,NB95、132mg/L,ClO2350、280mg,2。NB14min,80%;70min,95%;98min,NB2.6、2.2mg/L。2　ClO2NBFig.2　TheNBremovalrateofwastewater　　NB,NBNB,;ClO2、O2NB。　　HONB,HO[4]11,HO10-9s[19],NBNB。NB,,NB。,ClO2NB[4]13,。NBClO2NBClO2,NBNB。ClO2350mg,NB,(3)。23,ClO2NBNB209　ClO2,NB。3　ClO2NBFig.3　TheNBremovalrateofwastewaterofbiochemicaltreatment3.2　ClO2对NB废水中COD的去除效果　　COD1000mg/LNB280mgClO2,56min,COD88%～92%,COD80～100mg/L;14～42min,COD,6%～10%(4)。4　ClO2NBCODFig.4　TheCODremovalrateofNBwastewater　　COD957mg/LNB,ClO2350mg,56min,COD88%～92%。CODClO2。　　5CODNB350mgClO2。,21min,COD65%～75%,COD100mg/L。,ClO2,COD(5)NB(3)。5　ClO2CODFig.5　TheCODremoavalrateofNBwastewaterofbiochemicaltreatment3.3　催化氧化处理中pH的变化　　ClO2pHNB,pH。6,ClO2280mg,pH14～28min,。,ClO2(350mg),pH28min,。6　ClO2pHFig.6　TheeffectofClO2quantityonpHvalue　　ClO2pH。,pH[7]23,[10]284,。2、4,ClO2NBCOD。,NBCOD+;pH,OH—,HONBCOD。,-NO2HNO3(HCl),6,14～28min,90%NBCOD,pH;,pH,,pH(pH=6.4pH=7.9),pH,。　　6,ClO2,pH()。ClO2HCl。3.4　ClO2的脱色效果　　NB,ClO2(7)。56min,95%,NB、、。。3.5　运行成本　　,ClO2NB10.5,210　　29　3　200737　ClO2NBFig.7　ThecolorremovalrateofNBwastewater2.5()。NB,ClO215,NB0.18%。,ClO2NB。4　　　(1)ClO2NB,NB95%,COD90%。　　(2)NB,ClO2280mg,40～60min。　　(3)ClO2,,NB、COD《》,NB。[1]　,,.[J].,2002,3(5):31-35.[2]　,.[J].,2004,29(2):30-34.[3]　,,.[J].,2002,3(5):49-53.[4]　,,,.DSA[J].,2002,15(5).[5]　,,.Ti/SnO2-Sb2O5[J].:,2005,44(4):614-617.[6]　,.[J].,2004,4(6):90-92.[7]　,,,.“-UASB-PACT”[J].,2002,20(3).[8]　,,,.[J].,2005,25(6):455-458.[9]　,,.、[J].,2004,21(10):772-774,784.[10]　.Fenton[J].,2002,24(5).[11]　.O3、[J].,1997,23(3):12-14.[12]　,.-、[J].,2002,12(4):4-6.[13]　.[J].,2002,25(6):13-14.[14]　,,,.[J].,2004,26(4):250-252.[15]　,,,.[J].,2003,26(6):15-17.[16]　.[M].4.:,2002:467-470.[17]　,,.—ClO2[J].,2004,5(4):76-79.[18]　,,.()[M].:,2000:92-95.[19]　,,,.[J].,2006,7(1):136-141.责任编辑:赵　多　(:2006-08-30)(上接第207页)[3]　,.[M].:,2004.[4]　,,.[J].,2006,22(2):9-13.[5]　RITTMANBE,MCCARTYPL.Designoffixed-filmprocesseswithsteady-statebiofilmmodel[J].Prog.Wat.Tech.,1980,12:271-281.[6]　AVAEVAA.Modelingmassexchangeinthetreatmentoffluidinbiologicalfilter[J].SorietJ.Wat.Chem.Tech.,1985,7:7-9.[7]　CAPDEVILLEB,NGUYENKM.Kineticsandmodelingofaerobicandanaerobicfilmgrowth[J].Wat.Sci.Tech.,1989,2(1/2):149-170.[8]　SONGMINGZ,SHULINC.Theimpactoftemperatureonni-trificationrateinfixedfilmbiofilters[J].Aqua.Eng.,2002,26:221-237.[9]　MANNA,FITZPATRIKCSB,STEPHENSONT.Compari-sonoffloatingandsunkenmediabiologicalaeratedfiltersusingtracerstudytechniques[J].ProcessSafetyandEnvironmentalProtection,1995,73(2):137-143.[10]　CHUDOBAJ,CECHJS,CHUDOBAP.Theeffectoftankconfigurationonnitrificationkinetics[J].JournalWaterPollu-tionControlFederation,1985,57(11):1078-1083.[11]　AZIMIA,HORANJ.Theinfluenceofreactormixingcharac-teristicsontherateofnitrificationinactivatedsludgeprocess[J].Wat.Res.,1991,25(12):419-423.[12]　MANNAT,STEPHENSONT.Modelingbiologicalaeratedfiltersforwastewatertreatment[J].Wat.Res.,1997,31(10):2443-2448.[13]　.[M].3.:,1997.责任编辑:陈泽军　(:2006-12-18)211　ClO2