AO工艺N2O的产生与释放的影响因素

86Vol．8No．620146ChineseJournalofEnvironmentalEngineeringJun．2014A/ON2O1211*1．1000832．A/ODO、SＲTＲA/ON2O。SＲTA/ON2ODOＲ。N2OSＲTSＲT10d20dN2O0．319%0．002%。N2ODODO0．6mgO2/L、1．2mgO2/L、2．5mgO2/LN2O0．306%、0．007%0．013%。ＲN2ON2O300%0．007%。N2OSＲT20d、DO1．2mgO2/L、Ｒ300%。A/ON2OX703A1673-9108201406-2515-08InfluencingfactorsofnitrousoxideproductionandemissioninA/OprocessGuoHuiwen1ZhangZhenan2SunShichang1SunDezhi11．BeijingKeyLaboratoryforSourceControlTechnologyofWaterPollutionCollegeofEnvironmentalScienceandEngineeringBeijingForestryUniversityBeijing100083China2．PyongyangUniversityofArchitectureDPＲKAbstractAnA/OreactorwasusedunderacontinuousoperationconditiontostudytheinfluenceofDOSＲTandnitrificationrefluxratioＲonN2Oemissionduringartificialsewagetreatment．Theorthogonalexperi-mentresultsshowedthatSＲTowedthegreatestinfluenceonN2OemissioninA/OprocessfollowedbyDOandＲhadaminimumeffect．ThetotalN2OconversionrateinA/OreactordecreasedwhentherewasalongerSＲTfrom0．319%to0．002%onaveragewhenSＲTincreasedfrom10dto20d．AstoDOtheaveragetotalN2Oconversionratedecreasedfrom0．306%to0．007%firstlyandthenitincreasedslightlyto0．013%whenDOincreasedfrom0．6mgO2/Lto2．5mgO2/Lvia1．2mgO2/L．Noapparentrelationshipwasfoundbe-tweenN2OemissionandＲwhereasalowestaveragetotalN2OconversionwasfoundatＲof300%．TheoptimalcombinationoftheoperationalconditionswasDOfor1．2mgO2/LSＲTfor20dandＲfor300%．KeywordsA/OnitrousoxideDOSＲTnitrificationrefluxratio2010090532013－05－312013－07－101989～。[e-mail]*[e-mail]2OCO23101501N2O。。N2ON2O23。N2ODO、Ｒ、SＲT4-6。N2OAboobakar6DO1．0mgO2/LN2O0．0035kgN2O/hDO2．0mgO2/LN2O0．001kgN2O/h。N2O。N2O7-9。8、、N2O。N2O。N2OSBＲA/ON2O。A/O10A/ON2O。A/ODO、SＲT、ＲN2OA/ON2OA/ON2O。11．1A/O1、。1．6L。4．8L3。。。3L。、。HＲT12hMLSS1500～3000mg/L50%20．0±2．0℃。、。5d。3d、、3。20min80minN2O3。N2ONoda11。1．2A/O。24h。。12C6H12O6220mg/LCH3COONa250mg/LNH4Cl160mg/LKH2PO414．6mg/LK2HPO418．6mg/LNaHCO3300mg/LMgSO4·7H2O13．34mg/LFeSO4·7H2O13．34mg/LCaCl2·2H2O13．34mg/L1mL/L。NaHCO3。CoCl2·6H2O0．05g/LCuCl20．03g/LMnSO4·H2O0．31g/LZnCl20．05g/LH3BO40．05g/LAl2SO43·18H2O0．03g/L。1．31．3．1COD、NH+4-N、NO－2-N、NO－3-NMLSS1A/OFig．1SchematicdiagramoftheA/Oexperimentalsystem61526A/ON2O。DOpHMulti3420WTWDO、pH。1．3．2N2OAgilent7890AAgilentN2OHP-530m×320μm×0．25μm100℃60℃EDC300℃。3。1．3．3N2ON2O。0．5mL1mol/LH2SO4N20．5hN2O。N2ON2O11。1．420N2ON2ODO、SＲT、pH、C/N13-16pH、C/NDO、SＲT、。DO、SＲTＲN2O。DO1mgO2/L41116。Xie16DO2mgO2/LN2ODO0．5mgO2/LN2O。DO0．6、1．22．5mgO2/L。SＲT3SＲT10d17。5SＲT9dN2OSＲT15d1．2。SＲT10、1520d。ＲA/OＲ200%～300%。Ｒ18。N2O。Ｒ200%、300%400%。L934DO、SＲT、Ｒ33N2ON2OTNA/ON2O。1。1Table1AnalysisofregressiveorthogonalmethodDOmgO2/LSＲTdＲ%N2Oyi%10．6102000．9120．6153000．004630．6204000．003441．2103000．01551．2154000．002461．2202000．002372．5104000．03382．5152000．003392．5203000．0015T1j0．3060．3190．305T2j0．0070．0030．007∑yi=0．9755T3j0．0130．0020．013y=0．1084Ｒi0．2990．3170．298S2i0．05840．06680．0580Tijij。22．1A/OA/ON2O2。2A/OCOD。9COD92%COD27～40mg/L。NH+4-N1DO=0．6mgO2/LSＲT=10dＲ=200%98%NH+4-N1．0mg/L。1NH+4-N90．03%NH+4-N6．33mg/LDOSＲT。9TN66．18%～82．62%21TN66．18%NO－2-N715282Table2Ｒesultofregressiveorthogonalmethod%NO－2-Nmg/LNO－3-Nmg/LN2O%CODNH+4-NTN193．1690．0366．180．0351．1160．367．630．0110．9292．9699．3782．620．0190．0180．436．680．00460394．9798．9481．820．0280．0220．485．770．00330493．8699．0376．610．0390．0550．368．170．00360．012593．2498．882．310．0290．0260．406．500．00240692．8199．2479．930．0190．0180．188．010．00230794．299．1678．961．2060．1000．497．740．00540．028893．9899．0178．320．0230．0190．399．470．00340993．598．8479．450．0200．0180．368．160．001501．116mg/LSＲT、DOＲ。TN75%。NO－2-N71．206mg/LDOＲDO。NO－3-N89．47mg/LDOＲNO－3-N。A/O1920《》AGB18918-2002。2．2A/ON2O2．2．121A/ON2O。2Fig．2Visualanalyticalchartoforthogonalmethod2N2OSＲT20dDO1．2mgO2/LＲ300%。1ＲSＲT＞ＲDO＞ＲＲS2SＲT＞S2DO＞S2ＲSＲTA/ON2ODOＲ。2．2．2A/ON2O1SＲTSＲTA/ON2O3。3Ｒ200%300%SＲT10、1520dN2O0．91%、0．0034%、0．0023%0．015%、0．0046%、0．0015%。N2O3SＲTN2OFig．3EffectofSＲTonproductionandemissionofN2OSＲT。N2O2。Noda11。Noda11SＲT7、1020dA/ON2OSＲTN2O。9SＲT10d31、4、7N2O。23NO－2-N1．116、0．0550．100mg/L。81526A/ON2O。AOBNOB。SＲTNOBAOB。AOBNH+4-NNO－2-N2NH+4+3O2→2NO－2+2H2O+4H+NOBNO－2-NNO－3-N2NO－2+O2→2NO－3NO－2-N。N2ON2ONosN2NosN2O21。O2NO－2-NNos22。3NO－2-N0．035、0．0391．206mg/LN2O。5SＲTN2O。347N2ON2ODO=0．01mgO2/LNO－3-NNO－2-NDO。N2ON2ON2ON2O30minN2OSＲTNO－2-NDON2O。47N2ON2O。3Ｒ400%N2OSＲTSＲT20dN2OSＲT15dN2ODO。Ｒ400%SＲT20dDO0．6mgO2/LN2O。Ｒ200%SＲT10dN2O100DO0．6mgO2/LDOSＲTNO－2-NN2O。A/ON2OSＲT10d。23。2DODOA/ON2O4。DON2ON2O42425。4ＲDO0．6mgO2/L2．5mgO2/LN2ODON2O0．306%、0．007%0．013%。Ｒ=300%、DO=1．2mgO2/LN2ODOSＲT10dN2O4Quan25。4DO0．4、0．9、1．52．0mgO2/LN2ON1．6mg/L0．44DON2OFig．4EffectofDOonproductionandemissionofN2Omg/L。Quan25C/N1∶0．220．2、0．61．0L/minN2O8．2%6．1%3．8%。DON2ODOO2O2O2。O2NosN2ON291528N2O。DO0．6mgO2/L1N2ODOSＲT。AOB0．2～0．4mg/LNOB1．2～1．5mg/LDOO223NO－2-N。1NO－2-N1．15mg/LNH+4-N4．5mg/LAOBNO－2-NNH+4-NNO－2-NN2O。N2O。NH+4-N40mg/LDODONO－2-N0．1mg/L。Ｒassamee26NO－2-NO2。DONO－2-NN2O。DONO－2-N2N2O。3Ｒ4DO0．6mgO2/LN2OＲ。Ｒ200%400%N2O0．91%0．0033%。DO2．5mgO2/LＲN2O0．0034%0．0015%0．033%DOＲN2ON2O。ＲDON2O。SＲT10d31、4、7N2O。1DO=0．6mgO2/LＲ=200%N2O4DO=1．2mgO2/LＲ=300%7DO=2．5mgO2/LＲ=400%N2ON2ON2O。18N2O。1、47Ｒ200%、300%400%N2O0．91%、0．015%0．033%。4Ｒ300%N2ODO1．2mgO2/L。1ＲN2ODO0．6mgO2/L。N2OＲ