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当前位置:首页 > 商业/管理/HR > 管理学资料 > 低溶解氧下活性污泥法的短程硝化研究张小玲
张小玲, 王志盈, 彭党聪, 王晓昌(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(DO)下,在SBR和CSTR反应器内实现短程硝化的条件及其污泥性状的变化。试验结果表明,当SBR进水氨氮浓度为260mg/L时,氨氧化期间反应器内DO接近零,出水中亚硝酸盐氮占到亚硝酸盐氮和硝酸盐氮总和的80%以上,污泥沉降性能良好(SVI100mL/g);当CSTR的DO为0.2~0.3mg/L、SRT≤30d时实现了亚硝酸的积累,但运行50d后发生了污泥膨胀,导致污泥流失,硝化效率下降。 : 短程硝化; 亚硝酸盐氮积累率; 低DO; SBR; CSTR:X703.1 :A :1000-4602(2003)07-0001-04StudyonShort-cutNitrificationofActivatedSludgeProcessatLowDissolvedOxygenZHANGXiao-ling, WANGZhi-ying, PENGDang-cong, WANGXiao-chang(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitecturalScienceandTechnology,Xi'an710055,China) Abstract: Studywasmadeontheconditionsinwhichshort-cutnitrificationwasachievedandonthevariationofsludgecharacteristicsatlowDOinSBRandCSTR.ItwasshowedthatinSBR,wheninfluentam-monianitrogenis260mg/LandDOapproachestozeroduringammoniaoxidation,nitritenitrogenineffluentamountstoover80%ofthesumofnitratenitrogenandnitritenitrogen,withgoodsludgesettleability(SVI100mL/g).InCSTR,whenDOis0.2~0.3mg/LandSRT≤30d,nitriteaccumulationoccurs.However,af-teroperationof50d,sludgebulkingtakesplace,whichleadstolossofsludgeandreductionofnitrificationeffi-ciency. Keywords: short-cutnitrification; accumulationrateofnitritenitrogen; lowDO; SBR; CSTR :(50138020)1 试验材料和方法1.1 (SBR)(CSTR)。5L,4L。SBR、、、,25℃,CSTR,25℃。1.2 ·1· 2003Vol.19 CHINAWATER&WASTEWATER No.7,50~260mg/L(SBR)、200~300mg/L(CSTR),COD100~300mg/L,PO3-4-P1~3mg/L,12gNaH-CO3/g,。。1.3 :;:N-1-;:;COD:;。2 结果与讨论2.1 SBR2.1.1 SBR,(50~80mg/L),(200~260mg/L)20d。SBR、、1。1 SBR、2。2,,,。,,,。80mg/L140mg/L,57.2%,200mg/L,80%(1)。3。C/N(C/N=1∶2),(62.5%);,20mg/L。2 3 ,,50~80mg/L,,,;200~260mg/L,,,DO(),DO12.5mg/L。DO,,,,,·2·2003Vol.19 No.7,,。2.1.2 SBR(50~80mg/L)(COD100mg/L),3000mg/L2400mg/L。,,,SS20mg/L。,,。,300mg/L,,、。,12d3000mg/L。,SRT30d,3000mg/L。SBR,SVI100mL/g。2.2 CSTR2.2.1 CSTR200~300mg/L、25℃、pH7~8,DO。CSTR,、4。4 CSTRDOSRT4,,,SRT100d。620mg/L,CSTRDO1.5mg/L,,。14,DO0.2mg/L87.1%。DO0.2~0.3mg/L,,,,244.5%。,SRT30d,COD300mg/L,50%~60%,80%。,DO(0.2~0.3mg/L)SRT(30d)。DO:DO1.0~0.5mg/L,,,80%。,DO,。,,DO;,,30%。,DO0.5~1.0mg/L,DO0.15~0.3mg/L,,DO(0.15~0.3mg/L)。(KN=0.2~0.4mg/L)(KN=1.2~1.5mg/L),DO0.3mg/L,50%,20%,SRT,,。2.2.2 CSTR50d,COD≤300mg/L[0.25kgCOD/(kgMLSS·d)]、DO1.5mg/L0.2mg/L,SVI50~150mL/g,;COD400mg/L[0.33kgCOD/(kgMLSS·d)],DOSVI(6d120mL/g300mL/g),,。·3·2003Vol.19 No.713d,CSTR1800mg/L。,。CSTR(10mg/L,),DO,,,,SVI。,,SBR,SBR,,。SVI,13dSVI100mL/g。3 结论① SBR200~260mg/L,DO,(≥80%),。② DOCSTR,SRT。DO=0.2mg/L、SRT30d、0.25kgCOD/(kgMLSS·d),70%~80%;0.25kgCOD/(kgMLSS·d)。:[1] ,,,.[J].,2000,20(3):207-210.[2] ,,,.MBRDO[J].,2001,17(6):10-14.[3] LaanbroekHJ.CompetitionforlimitingamountsofoxygenbetweenNitrosomonaseuropaeaandNitrobacteriawinograd-skyigrownincontinuouscultured[J].ArchMicrobiology,1993,159:453-459.:(1976- ), , , , 。:13152173991E-mail:Zhangxiaoling2384@263.net:2003-03-04··湖北省武汉市污水处理厂工程 武汉市拟利用亚行贷款建设汉口的三金潭污水处理厂、青山的落步咀污水处理厂、武昌的黄家湖污水处理厂及三个水厂的污水收集系统。设计单位:武汉市市政工程设计研究院。(×104m3/d)(hm2)(km2)()()3040A/O※18.661.484884.812181020※※8.4730.139391.97.856.558641.6( )·4·2003Vol.19 No.7
本文标题:低溶解氧下活性污泥法的短程硝化研究张小玲
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