A2O曝气生物滤池工艺处理低CN比生活污水脱氮除磷陈永志

3010201010　　　　　　ActaScientiaeCircumstantiaeVol.30,No.10Oct.,2010:“”(No.2008ZX07317-007-105,2008ZX07209-003);“”(No.QAK200802)SupportedbytheNationalKeyScienceandTechnologySpecialProjects(No.2008ZX07317-007-105,2008ZX07209-003)andtheStateKeyLaboratoryofUrbanWaterResourceandEnvironment(HIT)(No.QAK200802):(1969—),,,E-mail:[e-mail];＊(),E-mail:[e-mail]:CHENYongzhi(1969—),male,Ph.D.candidate,E-mail:[e-mail];＊Correspondingauthor,E-mail:[e-mail],,,.2010.A2/O-C/N[J].,30(10):1957-1963ChenYZ,PengYZ,WangJH,etal.2010.BiologicalphosphorusandnitrogenremovalinlowC/NratiodomesticsewagetreatmentbyaA2/O-BAFcombinedsystem[J].ActaScientiaeCircumstantiae,30(10):1957-1963A2/O-C/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,北京100124:2009-12-20　　　:2010-03-07　　　:2010-05-05:C/N,A2/O-.,A2/O,.,A2/O,A2/O,,,.,、.C/N4.2,R250%,COD、TN、TP239.9、57.35.1mg·L-1,COD、TN、TP34.1、13.30.1mg·L-1,85.8%、76.9%98.3%.100%.,40.5%.:A2/O-;;;;C/N;:0253-2468(2010)10-1957-07　　　:X703.1　　　:ABiologicalphosphorusandnitrogenremovalinlowC/NratiodomesticsewagetreatmentbyaA2/O-BAFcombinedsystemCHENYongzhi,PENGYongzhen＊,WANGJianhua,ZHANGLiangchangKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124Received20December2009;　　　receivedinrevisedform7March2010;　　　accepted5May2010Abstract:Thebehaviorofbiologicalphosphorus(P)andnitrogen(N)removalinalab-scaledanaerobic/anoxic/oxic(A2/O)-biologicalaeratedfilter(BAF)combinedsystemwereinvestigatedduringthetreatmentofrealdomesticsewagewithlowC/Nratio.Inordertosolvetheconflictofsludgeretentiontime(SRT)betweennitrifiersandpolyphosphate-accumulatingorganisms(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.Batchtestsshowedthatthepopulationofdenitrifyingphosphate-accumulatingorganisms(DPAOs)wasupto40.5%ofthetotalPAOs.Keywords:theA2/O-BAFcombinedprocess;biologicalphosphorusandnitrogenremoval;sludgeretentiontime(SRT);theinternalrecycleratio(R);thelowC/Nratio;denitrifyingphosphorusremoval1　(Introduction)、、,,、(Leeetal.,2009;,2009).,A2/ODOI:10.13671/j.hjkxxb.2010.10.007　　　　　　　　　　30(//)、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/O-A2/O、、(BAF),1.1　A2/O-Fig.1　SchematicdiagramoftheA2/O-BAFbiologicalsystem　　,240L.A2/O,30L,9,2,3,4.,,,.,20L.,2～3mm,,,.,D100mm,H1.67m,13L,r195810:A2/O-C/N20%.、、、.A2/O,,;,,;,;,,,A2/O,.2.2　A2/O反应器与试验用水A2/O.,,1,A2/O,,1,.,1.1　Table1　TheinfluentcharacteristicsT/℃pHCOD/(mg·L-1)NH+4-N/(mg·L-1)NO-2-N/(mg·L-1)NO-3-N/(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,HITACHIS-4300,).2b,,.,,、.2　(a.,b.)Fig.2　SEMimagesofceramsitemediaintheBAF(a.Beforebiofilm,b.Afterbiofilm)2.4　分析项目及方法NH+4-N、NO-2-N、NO-3-N、TN、TP、COD、(MLSS)(APHA,2005);pH、DOWTW340i().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,1959　　　　　　　　　　30,.,A2/O,.,,,.,A2/O10d.1～21d,R200%;25～45d,R250%;49～65d,R300%.2.7　A2/O-曝气生物滤池系统中缺氧段反硝化除磷量的计算,:ΔCano=Ceff×QR+Cana(Qin+Qslu)Qin+QR+Qslu-Cano,ΔCano(mg·L-1);CeffTP(mg·L-1);Qin、QRQslu、(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)3.1　A2/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,-β-(PHAs),,.,、COD73.0%、9.0%2.5%.3　CODFig.3　EvolutionofCODremovalintheA2/O-BAFsystem3.2　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,TN77.5%,20.6%,20%,,250%.,,,(PHAs),.196010:A2/O-C/N(200%250%),,,,,,,TN.300%,A2/O,,,TN250%0.6%.(2008),,PHAs,,,,.(2008),C/N.4　Fig.4　EvolutionofnitrogenremovalintheA2/O-BAFsystem　4bTN、A2/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5.5,3TP4.6、5.25.7mg·L-1,TP21.6、35.635.1mg·L