A2O活性污泥工艺去除污水中雌激素的试验李咏梅

37820098()JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Vol.37No.8　Aug.2009:0253-374X(2009)08-1055-05DOI:10.3969/j.issn.0253-374x.2009.08.013:2008-04-25:(50578114,50878165):(1968-),,,,,.E-mail:[e-mail]2O李咏梅,杨诗家,曾庆玲,顾国维(,200092):——(A2O)(E2)(EE2).,A2O、.,A2O.20℃、100%,:8h,20d,300%.,,PO3-4-P,COD81%,95%,84%;E2,、、E272%,6%,22%;EE280%,、、EE245%,21%,34%.:——;;;:X703　:ALab-ScaleStudyonRemovalofEstrogenfromSewagebyA2OActivatedSludgeProcessLIYongmei,YANGShijia,ZENGQingling,GUGuowei(StateKeyLaboratoryofPollutionControlandResourcesReuse,TongjiUniversity,Shanghai200092,China)Abstract:Lab-scaleexperimentswereconductedtoinvestigatethedegradationpotentialof17β-estradiol(E2)and17α-ethinyl-estradiol(EE2)byanaerobic-anoxic-oxic(A2O)activatedsludgeprocess.Basedontheremovalofnutrientsandestrogen,theoperationalparameterssuchashydraulicretentiontime(HRT),sludgeretentiontime(SRT)andtherecycleratioofmixedliquor(r)wereoptimized.TheresultsindicatethatestrogensaredramaticallyremovedbytheA2Oprocess.Atthefixedtemperatureof20℃andsludgerecycleratioof100%,theoptimumoperationalparametersforHRT,SRTandrare8h,20dand300%,respectively.Undertheaboveoptimumconditions,theremovalefficienciesofTN,PO3-4-PandCODare82%,95%and84%,respectively.E2inthefinaleffluentisbelowthedetectionlimit;ofthetotallyremovedE2,72%,6%and22%areremovedintheanaerobic,anoxicandoxictanks,respectively.EE2removalefficiencyismorethan80%;theanaerobic,anoxicandaerobictankscontribute45%,21%and34%ofthetotallyremovedEE2,respectively.Keywords:anaerobic-anoxic-oxicprocess;E2;EE2;operationalparameters　　(E2,17β-estradiol)(EE2,17α-ethinylestradiol).E2,EE2.,,[1-3].E2EE2[4-5],E2EE2ng·L-1[6-7].,E213.4～41.3ng·L-1,8.6ng·L-1[8].A2O(——),.,,、,A2O、A2O.,COD()、TN()、TP(),,.,,A2O　　　()37　thr、tsrr,,、E2EE2,A2O,,.1　1.1　17β-(CAS50-28-2,≥98%)17α-(CAS57-63-6,≥98%),Sigma,,.,、、,NH4Cl,Mg,Ca,P,Fe,ρ,:ρ(COD)=375mg·L-1,ρ(TN)=35mg·L-1,ρ(TP)=6mg·L-1,ρ(E2)=15μg·L-1,ρ(EE2)=5μg·L-1.1.2　A2O1.,、1∶2.5∶4.5,16L,20℃.(/),60d,COD,.,ρ(MLSS)()3000mg·L-1,ρ(MLVSS)()2500mg·L-1,SVI()100,.(100%).、、、、,、、、、.1　A2OFig.1　SchematicdiagramofA2Oprocess1.3　1.3.1　250mL,0.45μm,,.5mL10mL,,5mL·min-1,.5min,.4mL,8.5mL,,40℃,1mL,,[9].1.3.2　,[10]:ρ(COD),;ρ(TN),;ρ(PO3-4—P),;ρ(E2)ρ(EE2),.VARIANProstar;ODSHYPERSIL,250mm,4.6mm,5μm;∶(35∶65),1mL·min-1;280/307nm;20μL;5ng·L-1;95%～104%.2　2.1　A2OA2O,20074～7thr,tsr,r.,0～0.2mg·L-1,0～0.4mg·L-1,2.5～3.8mg·L-1.、ρ(COD)1.1,thr,tsr,r,ρ(COD)(53.7mg·L-1),86%.,,E2;EE277%.2.2　thr、,,thr1056　8,:A2O　　.,,r=100%,200%,tsr=15d,2,A2Othr6,8,10,12h.2.1　ρ(COD)Tab.1　CODandestrogenconcentrationsineachunitoftheA2Osystemduringtheoperationalparametervariationperiodthrrtsr350～420(389)369～421(392)335～416(371)75～88(83.5)83～102(89.5)73～92(83.2)ρ(COD)/(mg·L-1)65～69(68.1)60～78(70.2)62～75(69.0)54～56(55.2)46～55(51.5)50～57(54.4)53～57(55.4)45～55(51.6)51～59(54.2)11133～12817(12080)12513～16391(14432)10016～14793(13234)1489～1768(1625)1769～2398(1985)1698～3588(2443)ρ(E2)/(ng·L-1)227～565(422)559～817(679)548～2253(1193)4268～5224(4786)4268～5255(4835)4455～5186(4876)1208～2424(1613)1455～2166(1835)2066～2876(2444)ρ(EE2)/(ng·L-1)470～3600(1446)919～1690(1322)1646～2093(1825)537～3034(1294)675～1285(939)1257～1538(1424)670～2037(1059)665～1026(833)1328～1599(1490)　　　　:、,..2　thrCOD、、Fig.2　EffectofHRTontheremovalofCOD,nutrientsandestrogens　　2,COD,TNPO3-4-P,thr,.thr,A2OE2,E2;EE2,6h61%,81%～86%,.、、、,thr,.,thr=8h,N,P,.2.3　tsrr=200%,thr=8h,A2Otsr10,12,15,20,25d.3.3　tsrCOD、、Fig.3　EffectofSRTontheremovalofCOD,nutrientsandestrogens　　3,tsr10d25d,COD85%,,TN,PO3-4-P,TN53%(tsr=10d)84%(tsr=25d),PO3-4-P98%(10d)71%(25d).,tsr.,tsrTNPO3-4—P.,E21057　　　()37　;EE2tsr=20d(81%);tsr20d,EE2.tsr,tsrEE2,EE2,EE2;,EE2.tsr,tsr20d,,COD,TN,PO3-4—P,E2EE2,86%,80%,89%,100%81%.2.4　rthr=8h,tsr=20d,A2Or=0.75,1,2,3.4.4　rCOD、、Fig.4　Effectoftherecycleratioofmixedliquor(r)ontheremovalofCOD,nutrientsandestrogens　　4,rCOD,PO3-4—P,TN.r,TN.r,E2;EE2r,r=300%,(82%).,r=300%.2.5　20℃,r=100%,thr=8h,tsr=20d,300%,A2O2,COD5.25,,COD84%,、、57%,7%,36%;E2,、、72%,6%,22%;EE283%,、、45%,21%,34%.E2EE2.JohnsonWilliams,80%E2EE2[11];Vader,,EE26d[12];,EE264%～78%,E292%～99.9%[2];JohnsonSumpter,85%E2EE2[13].,E2,EE2.2　A2OTab.2　RemovalefficienciesofCOD,nutrientsandestrogensbyA2Osystemundertheoptimizedconditionsρ(COD)ρ(TN)ρ(PO3-4—P)ρ(E2)ρ(EE2)/%848195100835　CODFig.5　Removalpercentagesoftheanaerobic,anoxicandoxictanksofthetotalremovedCODandestrogensundertheoptimizedconditions　　5,,COD,E2.,EE2,.E2,,.EE2,,,.,COD.3　(1)A2O.20℃、100%1058　8,:A2O　　,,:thr=8h,tsr=20d,r=300%.,TN,PO3-4—P,COD81%,95%,84%.(2)6～12h,10～25d,A2OE2;thr=6,EE261%,thr=8～12h,EE281%～86%;EE220d81%,20d,EE2;.(3),A2OE2,、、72%,6%,22%;EE283%,、、45%,21%,34%.(4)COD,,COD.:[1]　HintemannT,SchneiderC,ScholerH,etal.Fieldstudyusingtwoimmunoassaysforthedeterminationofestradiolandethinylestradiolintheaquaticenvironment[J].WaterResearch,2006,40(12):2287.[2]　DorabawilaN,GuptaG.Endocrinedisrupter-estradiol-inchesapeakebaytributaries[J].JournalofHazardousMaterials,2005,120(1-3):67.[3]　ShappellNW.Estrogenicactivityintheenvironment:Municipalwastewatereffluent,river,ponds,andwetlands[J].JournalofEnvironmentalQuality,2006