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当前位置:首页 > 商业/管理/HR > 质量控制/管理 > 电化学氢自养与硫自养集成去除饮用水中的硝酸盐王海燕
:0253-2468(2002)-06-0711-05 :X131 :A王海燕,曲久辉,雷鹏举 (, 100085):,2,SO2-4,H+.,pHCaCO3,.,(HRT)1.9—5h,3—16mA,NO-3-N90%,NO-3-NSO2-43.0mgL170mgL,NO-2-N,pH.:;;;SO2-4;CaCO3ElectrochemicalhydrogenandsulfurautotrophicdenitrificationcombinedprocessindrinkingwatertreatmentWANGHaiyan,QJiuhui,LEIPengju (StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-En-vironmentalSciences,ChineseAcademyofSciences,Beijing 100085)Abstract:Anelectrochemicalhydrogenandsulfurautotrophicdenitrificationintegratedprocesswasstudied.Inthisprocessthesulfateproduc-tioncouldbedecreasedintheeffluent.TheH+producedinthesulfurpartcouldmigratetotheelectrochemicalpartandformhydrogengasatthecathode,whichwashelpfultohydrogendenitrification.ThelimestoneusedtoadjustpHinthesulfurpartwasnotnecessary,thehardnessincreasecanbeavoidedaccordingly.Theresultsshowedthat.WhentheHRTwas1.9to5handthecorrespondingminimumcurrentwas16and3mA,thereactorcouldyieldexcellentresultsasfollows.TheNO-3-Nremovalefficiencywasabove90%andevenupto100%andthenitratewaslowerthan3.0mg(N)LandSO2-4waslowerthan170mgL,moreover,nonitritewasdetectedintheeffluent.Thesulfurandelectrochemicalparteffluentwaskeptneutral.Keywords:electrochemicalhydrogenandsulfurcombined;drinkingwater;autotrophicdenitrification;SO2-4;CaCO3:2001-11-03;:2001-12-07:(NKBRSF-G1999045710),(59978050):(1976—),,,,,30mg(N)L[1,2].,.,.,,.,、,.,、,100%200%[3—5].[6],,,,226200211 ACTASCIENTIAECIRCUMSTANTIAEVol.22,No.6Nov.,2002DOI:10.13671/j.hjkxxb.2002.06.005SO2-4.,CaCO3pH,.,NO-3-N,SO2-4,H+,,CaCO3pH.1 1.1 1 Fig.1 Theexperimentalset-up1.(),().,2.5cm,14cm;,7.28cm,16cm;2.4cm;0.52L;321cm2.7.28cm,35cm,(),3.0~4.0mm.1.23L,,30℃.1.2 ,2V,10mA,3d,.、.,3∶1,K2HPO4KH2PO4,pH7.,,,..NO-3-N30mgL.1.3 NO-3-N、NO-2-N、SO2-4、TOC、COD、ORP、pH.NO-3-N、NO-2-N、SO2-4Dionex4500i;TOCTekmarDohrmannApplo9000TOC;CODCTL-12;ORPOrion720ApH,9778BNORP;pHOrion828pH.2 2.1 :55S+50NO-3+38H2O+20CO2+4NH+44C5H7O2N+25N2+55SO2-4+64H+(1):: 2H++2eH2 (e0=0.828V)(2) 2H2O+2e-H2+2OH-(e0=0V)(3)712 22: C+2H2OCO2+4H++4e- (e0=0.207V)(4) 2OH-12O2+H2O+2e (e0=1.229V)(5): 2NO-3+5H2+2H+N2+6H2O(6) (1),NO-3N2,H+.H+,(2)H2(6).,(2),H2;(4),CO2,.2.2 TOC、COD、ORP、pH,2V,10mA,HRT0.5—14h,NaNO330mg(NO-3-N)L.,0.5h,(ORP)+200mV-200mV,.TOC、COD,TOC、COD,TOC3.5mgL,COD10mgL,pH7,(4)CO2pH,pH6.8—7.2,pH,.2.3 SO2-4,,HRT,,SO2-4.HRT2.5h,1.8—4.0V、2—18mA,2.NO-3-N74%—80%,2mgLNO-2-N,HRT,NO-3-N.,,,,NO-3-N、NO-2-N.10mA,NO-3-N90%;NO-3-N3mgL.12mA,NO-3-N92%,NO-2-N.18mA,NO-3-N100%.,1.8—4.0V,HRT,,NO-3-N90%,NO-2-N.NO-3-NNO-2-NN2,NO-3-NNO-2-NENO-3ENO-2,,E.3NO-3-N、NO-2-NENO-3、ENO-2E,,ENO-3ENO-2,NO-3-N、NO-2-N,NO-3-NNO-2-N.12mA,E100%;12mA,E100%,NO-2-N.7136:2 NO-3-NNO-2-NFig.2 NO-3-NremovalandNO-2-Nconcentrationintwopartseffluent3 ENO-3,ENO-2EFig.3 ENO-3,ENO-2andEtotalinelectrochemicalpart2.4 4 HRTNO-3-NFig.4 MinimumcurrentandNO-3-NremovalratioatdifferentHRTHRT,NO-3-N92%,NO-3-N、SO2-43.0mgL170mgL,NO-2-N,NO-3-N4.,HRT,.HRT1.9h、16mA,.HRT,NO-3-N、NO-2-N,.HRT5h,3mA,HRT,HRT5h,HRT5h.3mA,HRT,3mA(≥3mA).5 pHFig.5 pHofinfluentandeffluent2.5 SO2-4pH,SO2-4170mgL,(250mgL),SO2-4[7],,SO2-4NO-3-N(),5.20—5.80,7.452,NO-3-N,.pH,pH,5,、pH,pH.pH[8]2pH,2H++2e※H2,H+,CaCO3pH,.714 223 1.,NO-3-N,SO2-4,H+,.2.H+,CaCO3pH,pH,pH..3.,SO24170mgL,(250mgL),SO24.4.HRT1.9—5h,3—16mA,,(≥3mA),NO-3-N90%,NO-3-NSO243.0mgL170mgL,NO-2-N.:[1] .[M].:.1988[2] 、.[J].,2000,1(3):44—46[3] Melloretal.Reductionofnitrateandnitriteinwaterbyimmobilizedenzymes[J].Nature,1992,20(2):355—367[4] SakakibaraY.Numericalmodelingofabiofilm-electrodereactorusedforenhanceddenitrification[J].WaterScienceandTechnology,1994,29(10-11):517—524[5] 、.-.[J].,2001,21(1):39—43[6] BatchlorB,LawrenceAW.Akineticmodelforautotrophicdenitrificationusingelementalsulfur,[J].JWaterPollutionControlFed,1978,50(8):1986—2001[7] JoelM,TianCZhang.Nitrateremovalwithsulfur-limestoneautotrophicdenitrificationprocesses,[J].JournalofEnvironmentalEngi-neering,1999,125(8):721—729[8] TianCZhang.Sulfer:limestoneautotrophicdenitrificationprocessesfortreatmentofnitratecontaminatedwater:batchexperiments,[J].WaterResearch,1999,33(3):599—6087156:
本文标题:电化学氢自养与硫自养集成去除饮用水中的硝酸盐王海燕
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