A_2_O_曝气生物滤池工艺处理低C_N比生活污水脱氮除磷

3010201010ActaScientiaeCircumstantiaeVo.l30,No.10Oct.,2010:(No.2008ZX07317007105,2008ZX07209003);(No.QAK200802)SupportedbytheNationalKeyScienceandTechnologySpecialProjects(No.2008ZX07317007105,2008ZX07209003)andtheStateKeyLaboratoryofUrbanWaterResourceandEnvironment(HIT)(No.QAK200802):(1969!),,,Emai:[e-mail];*(),Emai:[e-mail]:CHENYongzhi(1969!),male,Ph.D.candidate,Emai:[e-mail];*Correspondingauthor,Emai:[e-mail],,,.2010.A2/OC/N[J].,30(10):1957-1963ChenYZ,PengYZ,WangJH,etal.2010.BiologicalphosphorusandnitrogenremovalinlowC/NratiodomesticsewagetreatmentbyaA2/OBAFcombinedsystem[J].ActaScientiaeCircumstantiae,30(10):1957-1963A2/OC/N陈永志,彭永臻*,王建华,张良长北京工业大学北京市水质科学与水环境恢复工程重点试验室,北京100124:20091220:20100307:20100505:C/N,A2/O.,A2/O,.,A2/O,A2/O,,,.,.C/N4.2,R250%,CODTNTP239.957.35.1mg∀L-1,CODTNTP34.113.30.1mg∀L-1,85.8%76.9%98.3%.100%.,40.5%.:A2/O;;;;C/N;:02532468(2010)10195707:X703.1:ABiologicalphosphorusandnitrogenremovalinlowC/NratiodomesticsewagetreatmentbyaA2/OBAFcombinedsystemCHENYongzh,iPENGYongzhen*,WANGJianhua,ZHANGLiangchangKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124Received20December2009;receivedinrevisedform7March2010;accepted5May2010Abstract:Thebehaviorofbiologicalphosphorus(P)andnitrogen(N)removalinalabscaledanaerobic/anoxic/oxic(A2/O)biologicalaeratedfilter(BAF)combinedsystemwereinvestigatedduringthetreatmentofrealdomesticsewagewithlowC/Nratio.Inordertosolvetheconflictofsludgeretentiontime(SRT)betweennitrifiersandpolyphosphateaccumulatingorganisms(PAOs),ashortSRTwasappliedintheA2/Oreactortowashoutthenitrifiers.Therefore,inthesystem,theA2/OreactorwasmainlyusedforPremovalanddenitrificationandtheBAFreactorwasusedfornitrification.TheexperimentalresultsclearlyshowedthatCOD,NandPcanbesimultaneouslyremovedinthiscombinedsystem.WhentheC/Nratiowas4.2andtheinternalrecycleratiowas250%,theconcentrationsofCOD,totalnitrogen(TN)andtotalphosphorus(TP)werereducedfrom239.9mg∀L-1,57.3mg∀L-1and5.1mg∀L-1intherawwastewaterto34.1mg∀L-1,13.3mg∀L-1and0.1mg∀L-1intheeffluent,respectively.TheremovalefficienciesofCOD,TNandTPreachedto85.8%,76.9%and98.3%,respectively.Inaddition,almost100%ammoniumnitrogenremovalefficiencywasachievedintheBAFreactor.Batchtestsshowedthatthepopulationofdenitrifyingphosphateaccumulatingorganisms(DPAOs)wasupto40.5%ofthetotalPAOs.Keywords:theA2/OBAFcombinedprocess;biologicalphosphorusandnitrogenremova;lsludgeretentiontime(SRT);theinternalrecycleratio(R);thelowC/Nratio;denitrifyingphosphorusremoval1(Introduction),,(Leeetal.,2009;,2009).,A2/O30(//)Bardenpho(///)UCT(//,)MUCT(///).,A2/O(Metcalfetal.,2003;Wangetal.,2006).,A2/O,,(,2003).(Mooreetal.,2001;Tairaetal.,2003;Jinwooetal.,2006;Haetal.,2007),(,2008;,2009).,C/N,,95%A.,A2/O,A2/O,A2/O,,A2/O,,;,,A2/O.,,C/N(Kubaetal.,1996;Barkeretal.,1996;Huetal.,2003),,,.,C/N,A2/O.,A2/O,;,,,.2(Materialsandmethods)2.1试验装置及运行程序A2/OA2/O(BAF),1.1A2/OFig.1SchematicdiagramoftheA2/OBAFbiologicalsystem,240L.A2/O,30L,9,2,3,4.,,,.,20L.,2~3mm,,,.,D100mm,H1.67m,13L,r195810:A2/OC/N20%..A2/O,,;,,;,;,,,A2/O,.2.2A2/O反应器与试验用水A2/O.,,1,A2/O,,1,.,1.1Table1TheinfluentcharacteristicsT/#pHCOD/(mg∀L-1)NH+4N/(mg∀L-1)NO-2N/(mg∀L-1)NO-3N/(mg∀L-1)TN/(mg∀L-1)C/NTP/(mg∀L-1)21~277.3~7.6188.0~311.442.5~59.80~0.220~0.9446.7~64.53.1~5.94.2~7.0247.4239.952.60.0040.0157.34.25.12.3曝气生物滤池反应器,24h,,1,A2/O.20d,80%,1100%.2(SEM,HITACHIS4300,).2b,,.,,.2(a.,b.)Fig.2SEMimagesofceramsitemediaintheBAF(a.Beforebiofilm,b.Afterbiofilm)2.4分析项目及方法NH+4NNO-2NNO-3NTNTPCOD(MLSS)(APHA,2005);pHDOWTW340i().2.5试验条件与运行环境A2/O(25~30#).A2/O126L∀d-1,(HRT)5.7h,100%,MLSS3.0g∀L-1,DO1~2mg∀L-1,DO0.1mg∀L-1.HRT0.5h,DO4~5mg∀L-1.2.6试验运行方案A2/O,,.A2/O,195930,.,A2/O,.,,,.,A2/O10d.1~21d,R200%;25~45d,R250%;49~65d,R300%.2.7A2/O曝气生物滤池系统中缺氧段反硝化除磷量的计算,:Cano=Ceff∃QR+Cana(Qin+Qslu)Qin+QR+Qslu-Cano,Cano(mg∀L-1);CeffTP(mg∀L-1);QinQRQslu(L∀d-1);CanaCanoTP(mg∀L-1).2.8反硝化聚磷菌占聚磷菌比例的序批试验,Wachtmeister(1997),.:A2/O2L,2,COD;2L,,COD100mg∀L-1,120min;,,2,COD.2,1,DO2~3mg∀L-1;1KNO3,NO-350mg∀L-1,,120min..3(Experimentalresults)3.1A2/O曝气生物滤池生化系统对有机物的去除特性COD3.3,COD188.0~311.4mg∀L-1,COD239.9mg∀L-1,COD34.1mg∀L-1,COD85.8%,.CODA2/O,84.5%1.3%.,CODA2/O3,(PHAs),,.,COD730%9.0%2.5%.3CODFig.3EvolutionofCODremovalintheA2/OBAFsystem3.2氮在A2/O曝气生物滤池生化系统中的转化规律4.4a,,,52.6mg∀L-1,0.2mg∀L-1,99.6%,;TN3,1(1~21d)200%,TN17.3mg∀L-1,TN69.7%,TNA;2(25~45d)250%,TN13.3mg∀L-1,TN76.9%,17.2%,25%,TNA;3(49~65d)300%,TN12.9mg∀L-1,TN775%,20.6%,20%,,250%.,,,(PHAs),.196010:A2/OC/N(200%250%),,,,,,,TN.300%,A2/O,,,TN250%0.6%.(2008),,PHAs,,,,.(2008),C/N.4Fig.4EvolutionofnitrogenremovalintheA2/OBAFsystem4bTNA2/O().4b,,,((100%),1~21d,200%;25~45d,250%;49~65d,300%).,,(0mg∀L-1),,14.0mg∀L-1,100%;,,,,TN,.4b,C/N,,,3.0mg∀L-1.,.3.3磷在A2/O曝气生物滤池生化系统内的转化规律5.5,3TP465.25.7mg∀L-1,TP21.635.635.1mg∀L-1,TP5.62.31.4mg∀L-1,,,TP0.20.10.2mg∀L-1.,35.215.216.2mg∀L-1,,.Hu(2002),,,3,,;,.5TPFig.5EvolutionofTPremovalintheA2/OBAF,3:%A2/O,196130;&,A2/O,,,PHAs;∋,,,.C/N.C/N,70%COD,,PHAs;,,PHAs,,.3.4反硝化聚磷菌占聚磷菌比例的序批试验结果/6,(