低DO下的短程硝化及同步硝化反硝化张小玲

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DO张小玲, 李 斌, 杨永哲, 王 磊, 王志盈(西安建筑科技大学环境与市政工程学院,陕西西安710055)   : 研究了低溶解氧下序批式反应器(SBR)的短程硝化特征和控制条件以及碳源浓度、投加方式对同步脱氮效率的影响。试验结果表明,保持高、低溶解氧交替的环境是实现短程硝化的关键;当进水NH+4-N为300mg/L、COD为400~600mg/L时,采用半连续碳源投加方式可保证总同步脱氮效率达到80%。  : 序批式反应器; 短程硝化; 同步硝化反硝化; 低溶解氧:X703.1  :A  :1000-4602(2004)05-0013-04Short-cutNitrificationandSimultaneousNitrificationandDenitrificationinSBRatLowDOZHANGXiao-ling, LIBin, YANGYong-zhe, WANGLei, WANGZhi-ying(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTech-nology,Xi'an710055,China)  Abstract: Studywasmadeonthecharacteristicsandcontrolconditionofshort-cutnitrificationinSBRatlowDO,andtheeffectofcarbonsourceconcentrationanddosingmodeonefficiencyofsi-multaneousdenitrification.TheresultsshowedthattomaintainenvironmentinwhichhighandlowDOoccuralternatelyisthekeytoachievingshort-cutnitrification.WhenNH+4-Nis300mg/LandCOD400~600mg/Lininfluent,useofsemi-continuousdosingofcarbonsourcecanguaranteesi-multaneousdenitrificationefficiencyupto80%.  Keywords: SBR; short-cutnitrification; simultaneousnitrificationanddenitrification; lowDO  :(50178059)1 材料及方法1.1 1。SBR5L(4L),、、、,(5min)、。1.2 ,:NH4HCO3、NaHCO3、CH3COONa·3H2O、KH2PO4,NH+4-N300mg/L,COD400~600mg/L,PO3-4-P3mg/L;。1.3 :;:N-1-;:;COD:;。·13·      2004Vol.20          CHINAWATER&WASTEWATER           No.51 2 结果与讨论2.1 、,28~32℃。,50~100mg/L,5mg/L。100mg/L200mg/L,,。10d、,,5mg/L,0.62kg/(m3·d),98%,、。2.2 SBRSBR6h,5min、295min、30min、15min、15min,(70~80L/h)。2。2 SBR2,(150mg/L)(5~180min),(180~240min),(240~300min)。,Monod,15mg/L,,;15mg/L,,,,DO。DOpH3。3 SBRDO、pH2、3:①,,DO;15mg/L,,,DO,(6mg/L)。②,pHNaHCO3,20minpH,pH。pH,H+H+(CO2),CO2,pH。③20min,pH,。2.3 DO70~80L/h,SBR、(3),;50~60L/h,(0~0.2mg/L),;()。4、5。4、5,SBR,5mg/L,73%90%,·14·2004Vol.20                              No.5;SBR,8,80~140mg/L(12d),50%,10mg/L5mg/L,;SBR,4d。4 5 ,、3。① DO,,DO。,DO,[1],,,。② DO,10、60、120min,,1。1,、,,,。,,。NO-2NO-3,,,30min。1 DO(min)1060120[kgN/(kgMLSS·d)]0.1530.2280.311[kgN/(kgMLSS·d)]0.00830.01130.0198(mg/L)125.913097.76(mg/L)48.518.45  ③ 、DO,、———[2],(PHB),,PHB。,,[3]。,();SBR(),,、,。,103∶1,SBR、,。2.4 ,。(、、),。,。,、,,。·15·2004Vol.20                              No.5COD。:();;()。2(300mg/L)。2 CODCOD(mg/L)COD(%)COD(%)40054.2595.4160060.3895.8256469.6696.3389768.9796.7140880.0894.1560280.996.24  2,COD,COD,COD,,50%~60%;70%,COD,,,;,80%。2CODCODCOD(,1gNO-2-N1.71gCOD),COD5.71%、9.26%、18.56%、10.85%、37.82%、26.33%。COD,,,COD,,。2.5 DO,,(160mL/g50~60mL/g)。(55),:200μm,543μm。,,。3 结论① 21~25℃、300mg/L、70~80L/hSBR,90%。、,。② ,。NH+4-N300mg/L、COD400~600mg/L,80%。:[1] LaanbroekHJ.Competitionforlimitingamountsofoxy-genbetweennitrosomonaseuropaeaandnitrobacteriawinogradskyigrownincontinuouscultured[J].ArchMi-crobiology,1993,159:453-459.[2] CartaF,BeunJJ,VanLoosdrechtMCM,etal.Simul-taneousstorageanddegradationofPHBandglycogeninactivatedsludgecultures[J].WaterResearch,2001,35(11):2693-2701.[3] ,Nicolasbernet.[J].,1999,17(6):10-14.:(1976- ), , , , 。:13152173991:2003-12-18本期责任编辑: 江 荣   编辑: 衣春敏 孔红春 王领全·16·2004Vol.20                              No.5

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