VE生产废水的短程硝化反硝化研究陈立伟

VE＊陈立伟　蔡天明　李顺鹏(,,210095)肖　娅(,225400)　许敬亮(,210095)　应用短程硝化-反硝化工艺在维生素E废水生物脱氮处理中的实验研究。结果表明,当溶解氧浓度为0.85mgL时的亚硝化率(NO-2-NNO-x-N)为18.9%,远远溶解氧2.65mgL时的1.13%;通过对回流污泥12h的缺氧选择处理,出水中的NO-2由原来的2.5mgL上升到25.6mgL,相应的污泥中亚硝化细菌与硝化细菌的数量比值由0.45提高到2.44;在进水中投加5～10mgL的ClO-3能够使污泥中硝酸细菌的活性受到明显抑制,但污泥中硝酸细菌的数量却增加了。在停止向进水中投加氯酸根离子后硝酸细菌活性可以缓慢恢复,15d后系统的亚硝化率稳定在55%～58%。　VE废水　脱氮　短程硝化-反硝化　亚硝化率　　　　　　　　＊(B300013)。1　-,NH+4NO-2,N2[1]。-,25%、40%、[2,3],CODCrNH+4[4]。,pH、、[5],MulderSHARON(SinglereactorsystemforHighactivityAmmoniaRemovalOverNitrite),[6]。E(VE),,[NH+4]CODCr0.15～0.35,-,。VE,-。2　2.1　废水水样和污泥E,NH+4=250～280mgL,CODCr=850mgL,NO-2NO-3。400mgLNaHCO3,pH7.3～7.5,。2.2　实验装置与实验条件,,1。1　　,7.5L,5.0Ld,36h,;,0～2.8L,50%,。7　　　20048224DOI:10.13205/j.hjgc.2004.04.001。,29～31℃。3　3.1　溶解氧浓度对硝化过程的影响-。,。25d,NO-3-NNO-2-N2。2　　2:NH+4NO-3,NO-2。0.85mgLNO-2NO-2+NO-318.9%,2.65mgL1.13%。0.4mgL,45%～63%,,,,42d[NH+4-N]。,(NH+4-N、NO-2-N、NO-3-N),1。pH7.0,NH3,。,NO-2NO-3,,。3.2　缺氧选择对硝酸细菌的抑制1.20mgL,,3。1　mgL0.8515711146.01.20157128.528.52.65157132.324.73　　:4h,NO-3-N,NO-2-N。,NO3--N,,NO-2-N;12h,NO-3-N2,NO-2-N25.6mgL,。,NO-2,,NO-2。32d(12h),,2。2　mL4.9×1071.1×10812h7.9×1073.2×1078　　　20048224　　,12h,0.452.44。,,。,,。3.3　投加氯酸盐对硝酸细菌的抑制NaClO3,。:1.2～1.4mgL,12h。4。4　NaClO3　,5～10mgL,NO-3-N,,,,12h。ClO-310mgL5d,。5.8×107mL,ClO-37.9×107mL;1.7×108mL,ClO-33.2×107mL。:ClO-3,ClO-3[6],NO-2NO-3,。。,,5。10mgL,5d,NO-3,,,15d,55%～58%。5　NaClO3　4　(1)VE-,NO2-,,。(2),。12h,40.1%。(3)5～10mgL,,。,,15d55%～58%。1　,,.-.,2000.16(2):29～31.2　dosSantosVAPM,TramperJandWijffelsRH.BiotechnolAnnuRev,1998.4:321～394.3　ClmstineHelmet,SabineKunst.SimultaneousNitrificationDenitnficationinanAerobicBiofilmSystem.Wat.Sci.Tech.1998.37:183～187.4　,,.-.(),2002.34(3):239～242.5　,..,2003.24(1):84～90.6　MulderJW,RogiervanKempen.N-removalbySharon.Iawqconference,1997.30～31.　　210095　6　　(025)84396685E-mail　[e-mail]2003-09-109　　　20048224SHORT-RANGENITRIFICATION-DENITRIFICATIONINTHETREATMENTOFWASTEWATERFROMVEPLANTChanLiweietal(7)…………………………………………………………………………………………Abstract　Short-rangenitrification-denitrifcationtechniquewasemployedtoincreasethenitrificationefficiencyinthebiodenitrificationofwastewaterfromvitaminEplant.Theresultsshowedthatthenitrosationrate(NO2-NNOx-N)was18.9%undertheconditionofdissolvedoxygenbeing0.85mgL;however,theratewasonly1.13%withthedissolvedoxygenbeing26.65mgL.TheconcentrationofNO-2oftheeffluentwasincreasedfrom2.5mgLto25.6mgLthrough12hoursofanaerobictreatmentofrecyclingsludge,andtheratiobetweenthenumberofnitritebacteriaandnitratebacteriainthesludgewasalsoincreased(from0.45to2.44).Theadditionof5～10mgLClO-3totheinfluentcouldeffectivelyinhibittheactivityofnitritebacteria,buttheirnumberwasincreasedremarkably;theiractivitycouldberecoveredslowlyuponthestopofadditionandthesystemcouldregainandmaintainanitrosationrateof55%～58%after15daysofcontinuousoperation.Keywords　wastewaterfromVEplant,biodenitrification,short-rangenitrification-denitrificationandnitrosationrateSTUDYONAPPLICATIONOFMEMBRANECHEMICALTECHNOLOGYINADVANCEDTREATMENTOFPAPERMILLWASTEWATERZhangKefengetal(10)…………………………………………Abstract　Amembranechemicalreactorwasusedtotreatthesecondarybiochemicaleffluentofpapermillwastewater.Theimpactofthemainfactors,suchastemperature,pH,doseoftheoxidantAKandaerationrateontheremovalrateofCODCrwasdiscussedwhenwastewaterflowedthroughthemembranechemicalreactor.TheresultsshowedthattheremovalrateofCODCrandcolouritywere87.1%,95%,andCODCrintreatedwaterwaslowerthan100mgLontheoptimumtechnologicalcondition.Thetreatedwatercouldalsobereused.Keywords　membranechemicalreactor,AKreagent,papermillwastewater,advancedoxidationandimpingememntstreamRESEARCHONOXYGENTRANSFERCHARACTERISTICSOFNEWINTERNALCIRCULATINGBIO-FLUIDIZEDBEDREACTORLiuJinetal(12)………………………………………………………………………Abstract　Anoptimalstructurehasbeenselectedbycomparingtheoxygentransfercoefficientsofseveralstructuresforanewinternalcirculatingbio-fluidizedbedreactor.Basedonwhich,theeffectofairflow,solidcontentandaeratoronoxygentransfercharacteristicsisstudied.Theexpermentalresultshowsthatagoodoxygentransfereffectcanbeobtainedusinglargesizebaffle,shorterdistancetothebottomofthereactor,aswellaslargeamountofgas;andtheoxygentransferisalsoaffectedbysolidcontent.Keywords　internalcirculatingbio-fluidizedbed,oxygentransfercoefficient,utilizationrateofoxygenandaeratorTREATMENTOFBREWERYWASTEWATERWITHUASB-OXIDATIONDITCHPROCESSLiJingcunetal(15)………………………………………………………………………………………………………………………Abstract　UASB-oxidationditchprocesswasusedtotreatbrewerywastewater.TheplantoperationshowedthatundertheinfluentconditionsofSS=325mgL,CODCr=1360mgLandBOD5=810mgL,afterthewastewaterwastreatedbytheprocess,SS,CODCrandBOD5oftheellfluentwouldbe60mgL,51mgLand15.1mgLrespectively.Comparedwithotherbiotreatmentprocesses,theprocesshassuchadvantagesaslesslandoccupation,higherremovalefficiencyofCODCrandloweroperatingexpense.Keywords　brewerywastewater,wastewatertreatment,UASB,oxidationditchandemissionsconformingwithstcrdardsREFORMINGWASTEWATERTREATMENTSYSTEMOFRUBBERPLANTPanXianfengetal(17)…………………………………………………………………………………………………………………………………………Abstract　Adetectionoftherunning