低DO紊动床内有机物对硝化过程的影响张小玲

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DO张小玲, 彭党聪, 王志盈, 袁林江(西安建筑科技大学环境与市政工程学院,陕西西安710055)   : 利用生物紊动床在低溶解氧(DO)和有机物存在的条件下研究了氨氮的亚硝化、硝化和有机物氧化的规律,分析了异养菌与自养菌竞争的特点。试验结果表明,DO为2~3mg/L、有机物浓度(TOC)为200mg/L、C/N=1∶1.5时对硝化作用影响不大;DO为0.5~1mg/L、TOC≥100mg/L、C/N=1∶3时硝化系统即受到破坏。  : 生物紊动床; 有机物; 硝化; DO:X703  :A  :1000-4602(2002)05-0010-04InfluenceofOrganicMattersonNitrificationatLowDOinBiologicalTurbulentBedReactorZHANGXiao-ling, PENGDang-cong, WANGZhi-ying, YUANLin-jiang(SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitecturalScienceandTechnology,Xi'an710055,China)  Abstract: StudywasmadeonnitrificationandorganicmatteroxidationundertheconditionoflowDOandexistenceoforganicsinbiologicalturbulentbedreactor,andanalysiswasconductedonthecompetitionbetweenheterotrophicandautotrophicbacteria.Thetestresultsshowthatunderthecon-ditionsofDO=2~3mg/L,TOC=200mg/L,andC/N=1∶1.5,thereislessimpactonnitrifica-tion;However,nitrificationsystemisdestroyedwithDO=0.5~1mg/L,TOC≥100mg/LandC/N=1∶3.  Keywords: biologicalturbulentbedreactor; organicmatters; nitrification; DO  :(59878042)  DO。(0.2~0.4mg/L)(1.2~1.5mg/L),DO,,。,(),,,DO,、、。、、、、,A/O,NO2-N,,,NO3-NNO2-NN2,NO2-NNO3-N,,。—。1 试验方法1.1 ·10·   2002Vol.18          CHINAWATER&WASTEWATER          No.51。1 2090,,。,12cm,44.6cm,3L,。120∶266,,,(、)。,,。(shell),4500m2/m3,0.69kg/L,0.41kg/L,0.25~0.3,1.512kg/(m3·d)。1.2 :CH3COONa、NH4Cl、K2HPO4、NaHCO3,N∶P(10~20)∶1,NaHCO3,pH。1.3 :;NO2-N:N-1-;NO3-N:;TOC:5000ATOC;DO:Metller-Toledo4100DO;MLVSS:;:MPN。2 结果与分析2.1 DO2.1.1 DO=2~3mg/LDO2~3mg/L,25℃,pH7.0~7.5,HRT5h,,(19)NO-2(60mg/L,N),,,,NO-2NO-3。,NO-3-N,NO-2-N。15,180mg/LNO-3-N155mg/L,5mg/L,,DO,,NO-3。2.1.2 DO=0.5~1mg/L[1.4kg/(m3·d),5mg/L],DO0.5~1mg/L,NO-2,NO-2(2)。2 DO=0.5~1mg/L2,(116)(1731),:80%,NO-2,,DO,(O2),NO-2,,,(DO),NO-2;:90%,NO-280%,,DO,,,NO-2,NO-2。2.2 2.2.1 DO=2~3mg/LDO,(NO3-N/(NO2-N+NO3-N)≥80%,≤5mg/L),50mg/L·11·2002Vol.18                              No.5(TOC),3。3 DO3,,(70%,。TOC50mg/L200mg/L,70%DO,DO。2.2.2 DO=0.5~1mg/L300mg/L、,,、(4)。4 DOTOC50mg/L,,70%;TOC100mg/L,20%,。20NO2-N14mg/L,NO3-N0.1mg/L,。,DO=0.5~1mg/L,TOC50mg/L,,,,。TOC100mg/L,,,,,,,。2.3 1。1 DO,DO,DO,DO,(/mL)1×10107.5×1095×10102.4×1083×1095.3×1081.8×1098×1054.8×10102.7×109,(、)。,、、。。,。,,,。(g/L)2.74.02.53.5  ① DO,1×1010/mL,3×109/mL;,4.8×1010/mL,7.5×109/mL(1/4),5.3×108/mL(4/5),,,。② DO,5×1010/mL,1.8×109/mL;,2.7×109/mL,2.4×108/mL(0.5%),8×105/mL(0.1%),,DO。③ DO,1×1010/mL,3×109/mL。DO0.5~1mg/L,5×1010/mL(DO5);·12·2002Vol.18                              No.51.8×109/mL(DO1/2),DO,,DO,。。3 结论① DO:300mg/L、DO0.5~1.0mg/L,,,NO-2,。② :TOC200mg/L(C/N=1∶1.5),(,pH,DO),,。③ DO:DO。(30℃0.3~0.5h-1)(30℃0.085h-1),DO,DO。99.5%99.9%,,、—,。:[1] ,,.[M].:,1990.[2] HaanakiK,etal.Influenceofdissolvedoxygenwithandwithoutorganicloadinginasuspended-growthreactor[J].WaterRes,1990,24(3):379-402.[3] LaanbroekHJ,etal.Competitionforlimitingamountsofoxygenbetweennitrosomonaseuropaeaandnitrobacteriawinogradskyigrownincontinuouscultured[J].ArchMi-crobiology,1993(159):453-459.[4] ,,.—[J].,2000,16(2):29-31.[5] ,.[J].,1995,8(1):20-23.[6] LazarovaV,MannemJ.Aninnovativeprocessforwastertreatment:circulatingfloatingbedreacter[J].WatSci&Tech,1996,34(9):89-99.[7] LazarovaV,NogueiraR,MannemJ,etal.Controlofni-trificationeffiencyinanewbiofimmreacter[J].WatSci&Tech,1997,36(1):31-41.:(1976- ), , , , 。:13087516949E-mail:zhangxiaoling2384@263.net:2001-10-04··安徽省合肥某养猪厂废水处理工程  该工程处理规模:50m3/d,总投资额:15万元,占地面积:500m2,处理流程:格栅※调节池※水解酸化池※人工湿地※水生生物塘※清水池※紫外消毒※回用冲洗场舍,设计单位:北京师范大学环境科学与工程系。目前该工程已开始施工。(   )·13·2002Vol.18                              No.5

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