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SBR刘秀红(北京城市排水集团有限责任公司,北京100038) : 采用SBR工艺处理生活污水,考察了短程硝化过程中可能存在的氮转化途径。结果表明,短程硝化过程中有52.6%的氨氮以非亚硝化的形式离开了反应系统,即存在52.6%的氮损失。其中,生成中间产物N2O、微生物合成作用以及同步硝化反硝化作用引起的氮损失分别占整体氮损失的15.5%、13.5%和71%。游离氨吹脱不是造成试验系统氮损失的原因。微生物种类、进水水质、环境条件和操作条件是影响氮转化途径的主要因素。 : SBR法; 短程硝化; 氮平衡; 氨氮:X703 :C :1000-4602(2010)01-0083-04NitrogenBalanceAnalysisduringShort-cutNitrificationinSBRLIUXiu-hong(BeijingDrainageGroupCo.Ltd.,Beijing100038,China) Abstract: Thepossiblepathwaysofnitrogentransformationduringshort-cutnitrificationofdomes-ticwastewaterwereinvestigatedusingSBRprocess.Theexperimentalresultsshowthat52.6%ofammo-niaisnottransformedintonitrite,thatis,52.6%ammoniaislostduringnitrification.Itisfoundthat15.5%,13.5%and71%ofthispartofammoniaareusedforN2Oproduction,microorganismgrowthandsimultaneousnitrificationanddenitrification,respectively.Freeammoniastrippingdoesnotcauseni-trogenloss.Themajorfactorsaffectingthepathwaysofnitrogentransformationaremicroorganismspe-cies,influentquality,environmentalconditionandoperationcondition. Keywords: SBRprocess; short-cutnitrification; nitrogenbalance; ammonianitrogen :“”(2006BAC19B03) ,。、。,(50%),,(),。[1、2],,“”;,[3]、[4]。SBR,,。1 材料和方法1.1 ,pH7.02~7.79,1。,COD·83·第26卷 第1期2010年1月 中国给水排水CHINAWATERWASTEWATER Vol.26No.1Jan.2010NH+4-N,。,NH4Cl,COD。1 Tab.1 Qualityofdomesticwastewatermg·L-1SCODNH+4-NNO-2-NNO-3-NTNPO3-4-P84~26628.84~90.220~1.550~2.3555.6~100.622.18~8.87340~400176.459.970.090.5469.324.42360 ,1.5,,SRT2000mg/L16d。1.2 1。1 Fig.1 Schematicdiagramofexperimentalset-upSBR,,,500mm,20cm,14L。10cm,;;,,;。,,()()pH。1.3 DO、pHORP;COD、NH+4-N、NO-2-N、NO-3-NMLSS;TOCTNmultiN/C3000TOC/TN;N2O[5]。2 结果与讨论,。2SBR。2,,NH+4-N1mg/L,0.52mg/LNO-3-N,100%。NH+4-N38mg/L0.5mg/L,NO-2-N18mg/L,,52.6%。2 NH+4-N、NO-2-N、NO-3-NSCODFig.2 ChangeofNH+4-N,NO-2-N,NO-3-NandSCODinshort-cutnitrification-denitrification,、N2O、N2、、,。2.1 N2O,N2ON2ON2O。,60minSCOD,,NH+4-N,N2O;,SCOD,NH+4-N,;,NH+4-N,NO-3-N0.52mg/L。,N2O;N2O、·84·第26卷 第1期 中国给水排水 。,,。,N2O,;,N2O。,N2O3.1mg/L,15.5%。2.2 ,,。2,60min,,38mg/L32mg/L,,。(AOB),。C5H7O2N,C10H19O3N,McCarty,(1)、(2)[6]。,,1/50;,。(1)(2),2.63mg/L,13.5%。① NH+4+1.38O2+1.98HCO-3AOB0.02C5H7O2N+0.98NO-2+1.89H2CO3+1.04H2O(1)② C10H19O3N+4.625O2+0.575NH+4+0.575HCO-31.575C5H7O2N+2.7CO2+5.425H2O(2),,。,。2.3 (SND),(、),,N2。,,,。,,,,,“”()。Third[7]2003“PHB”,。。,。Robertson[8],。,N2O、29%,71%。2.4 ,,。[4],,。(420mg/L),(38mg/L),,。3 氮转化途径的影响因素,。。3.1 。,。,N2。3.2 ·85·刘秀红:SBR法短程硝化过程的氮平衡分析第26卷 第1期,。,pH,,,。,,,,。3.3 、。,、、、、。,。3.4 DO、。DO,DO,,。,。。SBR,,。4 结论① ,,52.6%。② ,,N2O、15.5%、13.5%71%。。③ 、、。,SBR。:[1] ,,.[J].,2005,56(4):699-704.[2] ,,,.[J].,2007,23(3):102-105.[3] .[J].,2002,21(6):564-570.[4] ,.[J].:,2004,36(2):36-40.[5] ,,,.DON2O[J].,2008,29(3):660-664.[6] MetcalfEddy.WastewaterEngineering:TreatmentandReuse(4thed)[M].USA,NewYork:McGraw-Hill,2003.[7] ThirdKA,BurnettN,Cord-RuwischR.Simultaneousni-trificationanddenitrificationusingstoredsubstrate(PHB)astheelectrondonorinanSBR[J].BiotechnolBioeng,2003,83(6):706-720.[8] RobertsonLA,vanNeilEWJ,TorremansRAM,etal.SimultaneousnitrificationanddenitrificationinaerobicchemostatculturesofThiosphaeraPantotropha[J].ApplEnvironMicrobiol,1988,54(11):2812-2818.:15810645718E-mail:lxhfei@163.com:2009-07-17·86·第26卷 第1期 中国给水排水
本文标题:SBR法短程硝化过程的氮平衡分析刘秀红
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