复合式膜生物反应器去除城市污水中TN的研究刘强

TN刘　强1,2,　王晓昌1,　杨振锋3,　刘永军1,　袁宏林1(1.西安建筑科技大学环境与市政工程学院,陕西西安710055;2.济南水业集团有限责任公司,山东济南250012;3.西安市北石桥污水净化中心,陕西西安710086)　　　:　采用复合式膜生物反应器(HMBR)中试装置处理城市污水,考察了对TN的去除效果并探讨了脱氮机理。试验结果表明,HMBR能够显著提高脱氮效果,对TN的平均去除率为50.9%,比常规膜生物反应器(CMBR)提高了13.8%。由于生物膜对松散附着型胞外聚合物(LB-EPS)的吸附作用,HMBR中的LB-EPS与CMBR的相比明显降低。LB-EPS的降低使HMBR中絮体的粒径增加了近1倍,絮体密度明显增大,提高了同步硝化反硝化的效果。另外,一定厚度的生物膜同样可以进行同步硝化反硝化。与CMBR相比,HMBR中的活性污泥絮体和生物膜在提高脱氮效果上分别贡献了8%、5.8%。　　:　复合式膜生物反应器;　松散附着型胞外聚合物;　生物膜;　活性污泥;　同步硝化反硝化:X703.1　　:A　　:1000-4602(2008)21-0030-05StudyofTNRemovalfromMunicipalWastewaterbyHybridMembraneBioreactorLIUQiang1,2,　WANGXiao-chang1,　YANGZhen-feng3,　LIUYong-jun1,　YUANHong-lin1(1.SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China;2.JinanWaterSupplyGroupCo.Ltd.,Jinan250012,China;3.Xi'anBeishiqiaoSewagePurificationCenter,Xi'an710086,China)　　Abstract:　Apilot-scalehybridmembranebioreactor(HMBR)wasusedtotreatmunicipalwastewater,andtheremovalefficiencyofTNandthenitrogenremovalmechanismwereinvestigated.TheresultsshowthattheHMBRcansignificantlyimprovenitrogenremovalefficiency.TheaverageremovalrateofTNis50.9%,withriseof13.8%comparedwiththeconventionalmembranebioreactor(CM-BR).Duetotheadsorptioneffectofbiofilmonthelooselybondextracellularpolymericsubstances(LB-EPS),theLB-EPSintheHMBRarelessthanthoseintheCMBR.ThesizeofflocsintheHMBRisen-hancedbynearly100%,andthedensityofflocsisalsoenhanced,whichimprovestheeffectofsimulta-neousnitrificationanddenitrification(SND).Liketheflocs,theSNDalsooccursinthickbiofilm.ThecontributionsofflocsandbiofilmintheHMBRtotheimprovementofnitrogenremovalefficiencyare8%and5.8%respectively.　　Keywords:　hybridmembranebioreactor;　looselybondextracellularpolymericsubstances;　biofilm;　activatedsludge;　simultaneousnitrificationanddenitrification　　:(50621140001);　(863)(2006AA06Z328)·30·第24卷　第21期2008年11月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.24No.21Nov.2008　　(MBR)、、(SRT)、[1～3]。,MBR[4]。(CMBR),,。()CM-BR,(),(HMBR)。,CMBR,HMBR[5]。HMBRTN,。1　试验材料与方法1.1　,HMBR(1),CMBR。HMBR4.8m3/d,1.8m3,(0.2μm)。,25mm,12mm,50%。CMBRHMBR,。1　HMBRFig.1　SchematicdiagramofHMBRsystem1.2　,,1。1　Tab.1　CharacteristicsofrawwastewaterCOD/(mg·L-1)BOD5/(mg·L-1)TOC/(mg·L-1)NH+4-N/(mg·L-1)TN/(mg·L-1)TP/(mg·L-1)TSS/(mg·L-1)pH/℃235～891185～42720.1～49.820.3～46.822.5～54.14.1～13.7208～8577.0～7.617.8～24.21.3　CMBRHMBR,2。,。2　CMBRHMBRTab.2　OperationconditionsofCMBRandHMBRHRT/hSRT/dMLSS/(mg·L-1)MLVSS/(mg·L-1)/(mg·L-1)DO/(mg·L-1)CMBR10103850～4248(4058)2654～2960(2798)0.5～3.3(1.2)HMBR10103810～4350(4014)2630～2980(2796)1605～1750(1687)0.4～3.5(1.1)　:　。　　CMBR、HMBR(LB-EPS),LB-EPS,。HMBR,TN,、HMBR。1.4　COD:;BOD5:;:;TN:;TP:;TSS、MLSS、MLVSS:[6];:[5];TOC:TOC;DO:;pH:pH。:1L,(15r/min)10min30min,(ST);:SVI;:;:。LB-EPS:5mL0.2μm,(SMP);5mL,(12000r/min,20min),0.2μm,·31·刘　强,等:复合式膜生物反应器去除城市污水中TN的研究第24卷　第21期SMPLB-EPS,SMPLB-EPS。LB-EPSVSSTOC。2　结果与讨论2.1　TN,HMBR,TN50.9%,CMBR13.8%。,,,,,,,。,,,,[7、8]。DO,(SND),[9]。,SND。NO-3-N,HMBRNO-3-NCMBR,HMBR(2)。2　CMBRHMBRNO-3-NFig.2　ConcentrationsofNO-3-NinCMBRandHMBR2.2　CMBRHMBRLB-EPS,CMBRHMBRLB-EPS12、8mg/g,[10],HMBRLB-EPSCMBR39%。2.3　LB-EPSHMBR,,LB-EPS。LB-EPSEPS,。,LB-EPS,LB-EPS,,[11]。ST、SVILB-EPS3、4。3　LB-EPSFig.3　RelationshipbetweenLB-EPSandactivatedsludgebioflocculation4　LB-EPSFig.4　RelationshipbetweenLB-EPSandactivatedsludgesettleability3,LB-EPS。LB-EPS,ST,。4,LB-EPS。LB-EPS,SVI,。2.4　CMBR、HMBR5。5,HMBRCMBR,1。HMBRLB-EPS,LB-EPS,·32·第24卷　第21期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　。5　Fig.5　ActivatedsludgeflocssizedistributioninCMBRandHMBR2.5　,CMBR,HMBR。HMBRLB-EPSCMBR,,,,。2.6　、HMBR,,TN5.8%,,。,,HMBRTNCMBR8%,HMBR,DO,HMBR,。3　结论HMBR,TN50.9%,CMBR13.8%。LB-EPS,HMBRLB-EPSCMBR。LB-EPS、,HMBR1,,。DO,HMBR,。,、,CMBR,HMBR8%。DO,。,CMBR,HMBR5.8%。:[1]　MengFangang,YangFenglin,XiaoJingni,etal.Anewinsightintomembranefoulingmechanismduringmem-branefiltrationofbulkingandnormalsludgesuspension[J].JMembrSci,2006,285(1-2):159-165.[2]　YamamotoK,HiasaM,MahmoodT,etal.Directliquid/solidseparationusinghollowfibermembraneinanacti-vatedsludgeaerationtank[J].WaterSciTechnol,1998,21(1-3):43-54.[3]　vanDijkL,RonchenGCG.Membranebioreactorsforwastewatertreatment:thestateoftheartandnewdevel-opments[J].WaterSciTechnol,1997,35(10):35-41.[4]　ZhangShoutong,QuYanbo,LiuYihui,etal.Experimen-talstudyondomesticsewagetreatmentwithametalmembranebioreactor[J].Desalination,2005,177(1):83-93.[5]　,,.MBR[J].,2007,23(5):10-17.[6]　.(4)[M].:,2002.[7]　,,./[J].,2003,22(12):878-882.(下转第37页)·33·刘　强,等:复合式膜生物反应器去除城市污水中TN的研究第24卷　第21期,UV/H2O2/TiO2UV/O3/TiO2120、90min。,UV/H2O2/O3/TiO22h,TOC8.5mg/L0.18mg/L,97.9%,UV/H2O2/TiO2、UV/O3/TiO240%。UV/TiO2。,UV/H2O2/O3/TiO22.7272h-1,,UV/TiO27;UV/H2O2/TiO2UV/O3/TiO22h-1,UV/TiO24～5。:UV/H2O2/O3/TiO2UV/O3/TiO2UV/H2O2/TiO2UV/O3UV/H2O2UV/TiO2。2.4　UV/TiO2H2O2O3,H2O2O3,UV/TiO2·OH,,[3],。3　结论①　“”UV/TiO2,UV/TiO2,。②　UV/TiO2,。③　:UV/H2O2/O3/TiO2UV/O3/TiO2UV/H2O2/TiO2UV/O3UV/H2O2UV/TiO2。:[1]　,,,.“”[J].,2007,23(13):15-19.[2]　,,.[J].,1999,15(2):14-17.[3]　LogemannFP,AnneeJHJ.Watertreatmentwithafixedbedcatalyticozonationprocess[J].WaterSci