反硝化新工艺生物膜电极反应器张少辉

反硝化新工艺生物膜-电极反应器张少辉,郑　平,华玉妹(,　310029)　:--(BER),BER,。:-;　;　:X703　　:A　　:1003-6504(2004)04-0096-03　　、,NO-3,[1]。,,,NO-3,。,1992Mellor[2]-(Electro-bioreactor),(),H2NO-3N2。,Sakakibara[3-4],-BER(Biofilm-electrodeReactor),,-。BER,、,、、,NO-3。1　-1。(:Paracoccusdenitrificans,Micrococcusdenitrifi-cans)H2,,H2,H2NO-3NO-2,N2,1mol0.2molNO-3N2。[3]:　　　　2H2O+2e-※H2+2OH-　　　　2NO-3+2H++5H2※N2+6H2O:(1972-),,,。1　-　　[5]:　　2NO-3+6H2O+10e-※N2+12OH-:(1)NO-3,,(2),,(3)Monod(Km,Kmax)pH,(4)。Monod,、、,Sakakibara[5]BER,JN=0.2LAF,:JN=EfKmaxXLCKm+C,:A,F,L,X,KmaxNO-3,KmNO-3,CNO-3,Ef。,。2　BER。BER[3],,,。,,BER,、;BER,。BER,·96·　　　　　　　　　　　27　4　20047　　　　　DOI:10.19672/j.cnki.1003-6504.2004.04.039,,,2Sakakibara2001-,,,,,,H2O2。,,[5]。,H2,BER,3～60。2　-3　BER3.1　电流密度及电压BER,,NO-3。:,,,,;,NO-3,,,;,NO-3,,,,[6]。,。,,N2。10mA40mA,N24,N2(95%)CO2H2,NO、N2O[3]。Islam[6]BER,NO-3-N15mmol/L,20mA,NO-3-N98%,0.08mgNO-3-N/cm2·d,,,。3.2　pH值及其缓冲系统pH7.0～7.5,pH6.08.0,。BER,H+,pH,,。BER,,,CO2pH。,。NO-3-N(20mg/L),25mA,NO-3-N82%～87%,NO-3N2O[7]。Feleke[4],NO-3-N23mg/L,,NO-3-N,pH6.4～7.4,,pH,。3.3　原水水质NO-3,Na+、K+、Ca2+、Mg2+、SO2-4、Cl-。,Ca2+、Mg2+,pH,,,。,BERNO-3,,Na+、K+、SO2-4、Cl-PO3-4,,,,[4]。,,,。Kuroda[8]3.8,NO-2。BER,BER,,24℃NO-3-N40mg/L,10.68g/m3·h,,NO-2,BER[9]。·97·-　,3.4　温度Arrhnius,,。BER30℃。[10]BER,HRT=4h,24～32℃,,4℃0.36mg/L·h,32℃。3.5　其它因素BER,,,30d[11],,。,,,10d[12]。、、、。、、。BER,,,。4　(1)BER,BER,。(2)BER,。(3)BER,-,。[][1]　VitousekPM,AberJD,HowarthRW,etal.HumanAlterationsoftheGlobalNitrogenCycle:SourcesandCon-sequences[J].EcolAppl,1997,7(3):737-750.[2]　MellorRB,RonnenbergJ,CampbellWH,etal.Reduc-tionofNitrateandNitrateinWaterbyImmobilizedEn-zymes[J].Nature,1992,355(20):717-719.[3]　SakakibaraY,KurodaM.ElectricPromptingandControlofDenitrification[J].BiotechnolBioeng,1993,42:535-537.[4]　FelekeZ,ArakiK,SakakibaraY,etal.SelectiveReduc-tionofNitratetoNitrogenGasinaBiofilm-ElectrodeReac-tor[J].WatRes,1998,32(9):2728-2734.[5]　SakakibaraY,NakayamaT.ANovelMulti-ElectrodeSystemforElectrolyticandBiologicalWaterTreatments:ElectricChargeTransferandApplicationtoDenitrification[J].WatRes,2001,35(3):768-778.[6]　FloraJRV,SuidanMT,IslamS,etal.NumericalModelingofaBiofilm-electrodeReactorUsedforEnhancedDenitrification[J].WatSciTech,1994,29(10-11):517-524.[7]　IslamS,SuidanMT.ElectrolyticDenitrification:LongTermPerformanceandEffectofCurrentIntensity[J].WatRes,1998,32(2):528-536.[8]　KurodaM,etal.High-rateDenitrificationofNitratePol-lutedWaterbyaBioelectroReactorProcess[J].JournalofJapanSocietyonWaterEnvironment,1994,17(10):623-631.[9]　,,,.--[J].,2001,21(3):257-262.[10]　,.[J].,1996,15(6):25-27.[11]　.[J].,1999,16(6):21-23.(:2003-02-17;:2003-04-07)(上接第75页)[6]　,.[M].:,2001.[7]　AGil,LMGandia.Recentadvancesinthesysthesisandcatalyticapplicationofpillaredclay[J].Catal.Rev-Sci.Eng.,2000,42(1-2):145-212.[8]　SASolin.Claysandclayintercalationcompounds:proper-tiesandphysicalphenomena[J].Annu.Rev.Mater.Sci.,1997,27:89-115.[9]　SMBradley,RAKydd.Ga13、Al13、GaAl12andChromium-pillaredmontmorillonites:AcidityandReactivityforCumeneConversion[J].J.Catal.,1993,141:239-249.[10]　HlDelCastillo,AGil,PGrange.Influenceofthenatureoftitaniumalkoxideandoftheacidofhydrolysisinthepreparationoftitanium-pillaredmontmorillonites[J].JPhysChemSolids,1997,58(7):1053-1062.[11]　DingZ,KloproggeJT,FrostRL,etal.Porousclaysandpillaredclays-basedcatalysts:Part2.Areviewofthecatalyticandmolecularsieveapplications[J].JPorousMater,2001,8(4):273-293.[12]　MaesN,HeylenI,CoolP,etal.Theoreticalevaluationofpillaredclayadsorbent:PartI.ThemicroporosityofAlandTi-pillaredmontmorillonite[J].JPorousMater,1996,3(1):47-59.[13]　KanekoT,ShimotsumaH,KajikawaM,etal.Synthesisandphotocatalyticactivityoftitaniapillaredclays[J].JPorousMater,2001,8(4):295-301.(:2002-12-09;:2003-04-28)·98·　　　　　　　　　　　27　4　20047　　　　　traditionalalkaline-absorptionprocess.Thesmellofmethylmer-captanwaseliminatedunderreactiontemperature25～55℃,mo-larratioofchlorineandmethylmercaptan1.05～1.15andpHvalue2～3.Thetechniqueisfitformiddleandsmallsizedchemi-calworkstotreattailgasofmethylmercaptan.Keywords:methylmercaptan;mercaptan;chlorineoxidation;techniqueoftailgastreatmentBiodiversityConservationinUrbanEnvironmentalConstructionHUYu-jie1,ZHANGGuang-sheng2,ZHUYi-bo1,ZHOUQing1,2(1.SchoolofBiotechnology,JiangnanUniversity,Wuxi214036;2.KeyLaboratoryofIndustrialBiotechnologyofMinistryofEducation,JiangnanUniversity,Wuxi214036)Abstract:Urbanenvironmentalconstructionisoneofcentralpartofurbanconstruction,andurbanbiodiversityconservationisoneofimportantindicatortoassessenvironmentalconstructionandurbanenvironmentalquality.Theimportanceandsolutionsofbiodiversi-tyconservationweredescribedbasedonanalysisofurbanenviron-mentalconstructioninChina.Keywords:urbanenvironmentalconstruction;biodiversityconser-vation;problemsandsolutionsStudyonEcologicalRestorationofMangroveEcosystemHEFen-lin(ShenzhenMunicipalEnvironmentalMonitoringCentre,Shenzhen518001)Abstract:Mangroveisaecosystemwithparticularstructureandfunction,andrestoringdegradedmangroveecosystemiseffectivetoimprovebiodiversityofmangrove.ThedegradedconditionandrestorationobjectivesofthisecosysteminFutian