张小玲, 彭党聪, 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) : 分别研究了传统反硝化中硝酸盐氮负荷、CODN、pH值对反硝化速率及效率的影响,得出传统反硝化时最大硝酸盐氮负荷为0.08kg(kgMLSS·d),合适的CODN为6~7,适宜的pH值为7.5~8。对分别以NO-3和NO-2为初始基质的反硝化速率进行的对比试验结果表明,在温度为25℃、pH值为7、基质浓度300mgL时以NO-2为初始基质的反硝化速率较快,但当基质浓度300mgL后反而是以NO-3为初始基质的反硝化速率较快。 : 传统反硝化; 短程反硝化; CODN; pH值:X703.1 :A :1000-4602(2002)09-0001-03StudyontheAffectingFactorsandCharacteristicsofConventionalDenitrificationandShort-cutDenitrificationZHANGXiao-ling, PENGDang-cong, WANGZhi-ying(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitecturalScienceandTechnology,Xi'an710055,China) Abstract: StudywasmaderespectivelyontheinfluenceofNitratenitrogenloading,CODNra-tioandpHvalueontherateandefficiencyofconventionaldenitrification.Theresultshowedthatintheconventionaldenitrification,themaximumnitratenitrogenloadingcanreach0.08kg(kgMLSS·d)withtheproperCODNratioof(6~7)∶1andtheoptimalpHvalueof7.5~8.ThecomparativestudyonthedenitrificationratebyusingNO-3andNO-2asinitialsubstratesindicatedthatattemperatureof25℃,pHvalueof7,andsubstrateconcentration300mgL,morerapiddenitrificationratecanbeachievedbasedonNO-2ofsubstrate;whereasatsubstrateconcentration300mgL,thedenitrificationrateisfasterbasedonNO-3. Keywords: conventionaldenitrification; short-cutdenitrification; CODN; pHvalue :(59878042)1 材料和方法1.1 。,,。∶100∶1,:;:;:。1.2 :;NO-2-N:N-1-;NO-3-N:;TOC:·1· 2002Vol.18 CHINAWATER&WASTEWATER No.95000ATOC;。2 结果与分析2.1 2.1.1 1。1 [kg(kgMLSS·d)][kg(kgMLSS·d)](%)10.12(0.045)0.28(0.032)5020.1(0.078)0.36(0.08)7030.08(0.065)0.53(0.109)8340.06(0.09)0.56(0.129)8550.05(0.12)0.64(0.022)8960.04(0.011)0.7(0.09)92 : 25℃,CODN=6,pH=7.5;3;( )。 1,,NO-3。0.08kg(kgMLSS·d),80%;0.08kg(kgMLSS·d),。2.1.2 CODN(COD),NO-3。,;COD,。,CODN。,CODN=6.4NO-3-N85%,COD97%;CODN6.4NO-3-NCOD,NO-3,(CODN=5NO-382%,CODN=4NO-3-N74%);CODN6.4NO-3-N。2.1.3 pHpH1。1pH,pH7.5~8.0。pH,pH7.7。1 pH2.2 NO-3NO-2(NO-3-NNO-2-N50、100、200、300mgL),。2.2.1 2~5。2 50mgL3 100mgL4 200mgL·2·2002Vol.18 No.95 300mgL2~5,50、100、200mgL,NO-2NO-3;300mgLNO-2NO-3,80%,NO-3285min,NO-2380min。NO-3-NNO-2-N200mgLr[NO-2]=0.79kg(kgMLSS·d)、r[NO-3]=0.53kg(kgMLSS·d),300mgLr[NO-2]=0.35kg(kgMLSS·d)、r[NO-3]=0.40kg(kgMLSS·d)。2.2.2 pHNO-2,,,pH。pH6(),pH8pH(MgCa),pH6、7、8。3(MLSS=3000mgL,NO-2-N250mgL,t=25℃),pH=6[0.02kg(kgMLSS·d)],pH=70.12kg(kgMLSS·d),pH=80.48kg(kgMLSS·d),pH68,HNO2,pH、NO-2-NHNO2,。2.2.3 HNO2pH6、7、8NO-2-N26.7、267、2670mgL,HNO2。HNO2,NO-2NO-3,NO-2-NHNO2。3 结论① 、CODN、pH,[0.08kg(kgMLSS·d)]、CODN(6~7)pH(7.5~8)。② (NO-2NO-3)300mgL;HNO2,pH。③ NO-3-NNO-2-N300mgL,HNO2,CharlesGlass。④ NO-2-N,NO-2NO-3,。:[1] ,,,.[J].,2000,16(4):1-4.[2] ,,,.[J].,2000,20(3):207-210.[3] .[J].,1994,14(4):445-453.[4] CharlesGlass,JoAnnSilvestein,JeillOh.Inhibitionofdenitrificationinactivatedsludgebynitrite[J].WaterEnvironmentResearch,1996,69(6):1086-1093.:(1976- ), , , , 。:13087516949E-mail:zhangxiaoling2384@263.net:2002-03-07·3·2002Vol.18 No.9