改进分段进水AO生物脱氮工艺强化生物除磷王伟

AO,,,(,　100124):AOCN.,AO.AOTN66.52%,TP29.74%;AO,0.45∶0.35∶0.20,TP89.81%,,TN73.61%,7.09%.,、,,,.,[P(MLSS·t)]2.34mg(g·h)10.67mg(g·h),0.33mg(g·h)2.81mg(g·h).:;;;;AO:X703.1　:A　:0250-3301(2009)10-2968-07:2008-11-09;:2008-12-20:“”(2008ZX07317-007-105,2008ZX07314-008-01);(PHR20090502);2008:(1979～),,,,E-mail:[e-mail]＊,E-mail:[e-mail]-feedAOBiologicalNitrogenRemovalProcessforEnhancedPhosphorusRemovalWANGWei,PENGYong-zhen,YINFang-fang,WANGShu-ying(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:Apilot-scalestep-feedAOsystemwasusedtotreatlowCNmunicipalwastewater.Toobtainhighqualitysimultaneousnitrogenandphosphorusremoval,amodifiedstep-feedAOsystemwasdevelopedandthenitrogenandphosphorusremovalefficiencywasevaluatedbetweentheoriginalandmodifiedsystem.TheresultshowedthatTNremovalefficiencywas66.52%andTPremovalefficiencywasonly29.24%beforethemodifiedconfigurationwasapplied.Whenthemodifiedsystemwasadopted,thesatisfiedsimultaneousnitrogenandphosphorusremovalwasachieved.TPremovalefficiencyincreasedto89.81%andTNremovalefficiencywas73.61%whentheoptimalfeedingratio(0.45∶0.35∶0.20)wasapplied.Comparedtotheoriginalconfiguration,TNremovalefficiencyincreasedabout7.09%duetotheenhanceddenitrifyingphosphorusremoval,whichsavedthecarbonsourcefordenitrification.Toevaluatetheselectionanddominanceofpolyphosphate-accumulatingorganisms(PAOs)anddenitrifyingpolyphosphate-accumulatingorganisms(DNPAOs),batchtestwasexploredtoexaminetheanaerobicphosphorusrelease,aerobicandanoxicphosphorusuptake.TheresultshowedthatbothPAOsandDNPAOswereaccumulatedgraduallywhenthemodifiedsystemwasapplied.ThemaximalaerobicPuptakerate[P(MLSS·t)]wasincreasedfrom2.34mg(g·h)to10.67mg(g·h)andtheanoxicPuptakeratewasincreasedfrom0.33mg(g·h)to2.81mg(g·h)whenthemodifiedsystemwasoperated.Keywords:nitrogenremoval;phosphorusremoval;denitrifyingphosphorusremoval;step-feed;AO　　(AO).,,,;,,[1～5].AO,AO,.,AO(PAOs).,,.,(BNR).,BNR,,[6～8].,、,.BNR,Bardenpho、A2O、UCT、MUCT、JHB,.,,3010200910　　　　　　ENVIRONMENTALSCIENCEVol.30,No.10Oct.,2009DOI:10.13227/j.hjkx.2009.10.023,,、.,AOCN,AO,,,,.CODN,.,,,,(COD),[9,10],,,“”,.、,,,.1　1.1　1.AO1(a).3,,3.3,,.(D1)Q1,(N11、N12、N13),(D2),Q2,.3Q3,3,,,3(TN).AO,,,CN.,,AO,A2O1(b).1,,,,,,,.,.1Q1,,PHA,D1,PHA,.1,1Q1,,PHA.2,CN,2,,.1.2　1　AOFig.1　Schematicdiagramofpilot-scalestep-feedAOsystem　1.2.1　.320L,3,20.,90L.5、,,.4.22℃.3,Ⅰ1(a)3AO,Ⅱ、Ⅲ1(b)296910:AOA2O+2AO.1.Q,960Ld,(HRT)8h.(Qr)0.6Q,Ⅱ、Ⅲ(Qc)0.3Q.Ⅰ(SRT)15d,Ⅱ、ⅢSRT10d.1.1.2.2　1　1)Table1　Experimentdesignandoperationalparameters-1-1-2-2-3-3Q1∶Q2∶Q3L·d-1SRTdQrQcⅠ(0～30d)—2325802324642325800.33∶0.33∶0.33320320320150.6-Ⅱ(31～60d)2322324642324642324640.33∶0.33∶0.33320320320100.60.3Ⅲ(61～90d)2322324642324642324640.45∶0.35∶0.20432336192100.60.31):()(L)　　():COD228.5～307.6mgL,TN59.9～88.7mgL,NH+4-N58.42～85.7mgL,BOD5110.7～150.5mgL,NO-x-N0.07～1.48mgL,(TP)5.14～7.3mgL.CODTN3.06～4.41,CODTP35.7～55.1.,.,,(3h4h)SBR30d.1.2.3　(PAOs)(DNPAOs),.0、20、50、80d,,210LSBR.,COD(200±10)mgL,6mgL.180min,.2,5LSBR,,25mgL.2300min.30min1.WTW340iDOpH,,HClNaOHpH7.0～7.15.WTW730iORP.22℃.1.3　COD、NH+4-N、NO-2-N、NO-3-N、MLSS[11],TKNBehr,DO、pHWTW340i,ORPWTW730i.2　2.1　2　Fig.2　PhosphorusremovalefficiencyofsystemunderdifferentoperationalconditionsTP2.,(0～10d),,TP47.75%,,TP,Ⅰ,TP20%.,TPPAOs1,,,.,PAOs,PAOs,.(3),ⅠD1,PHA,,2970　　　　　　303　Fig.3　Phosphorusconcentrationateachstageunderdifferentoperationalconditions　,.Ⅱ,,.A2O,,.4,ⅡTP,TPⅠ29.74%51.75%.(3),Ⅱ12.04mgL,D1.,Ⅱ,,,.,.Ⅱ,D14～5mgL,,,[10,12,13],,,Ⅲ145%,.Ⅲ,1,,,24.01mgL,Ⅱ1.,PHA,,0.5mgL,TP89.81%.,(3),D1,1.58mg(g·h),2.04mg(g·h),77.45%.,20%～40%[14],PHA,,;,PHA,,;,PHA,,(),.2.2　3,4.,3,,,3,98.25%、98.65%98.0%.3,、5.,,2mgL,.Ⅲ,133%45%,11,17.62mgL,,,2mgL.4　Fig.4　Nitrogenremovalefficiencyofsystemunderdifferentoperationalconditions3TN66.52%、72.18%73.61%.TN,4,75d,,TN297110:AO80.18%.CN(CODTN3.06～4.41),,、.TPTN.ⅡⅢ,TP,TN.,,1D1,.、(5),Ⅲ,D10.4mgL,,,,,2、3,TN.,、、TN、TP2.5　、Fig.5　Ammoniaandnitrateconcentrationindifferentstageunderdifferentoperationalconditions　2　,、、TN、TPTable2　Ammonia,nitrate,TNandTPremovalunderdifferentoperationalconditionsⅠⅡⅢNH+4-NNO-3-NTNTPNH+4-NNO-3-NTNTPNH+4-NNO-3-NTNTP70.150.9971.146.1768.021.2269.247.36610.7961.796.86A()————41.180.4041.5812.0443.710.7544.4624.01D1()22.444.7725.208.3428.374.7433.117.6931.110.4031.5111.74N11()14.6412.2826.926.4110.0719.3229.385.3824.103.3427.447.5N13()0.91521.3722.285.051.2227.0928.314.457.6221.4129.045.14D2()11.5910.6622.256.5117.089.7126.796.8918.606.5625.162.04N21()8.5415.3723.915.8810.6815.9326.604.1114.3311.3925.731.93N23()0.6118.8219.435.011.8323.0724.903.604.2719.7924.061.29D3()8.8513.6222.465.508.8511.0519.894.0111.287.8719.161.86N31()6.4117.2423.654.786.7112.5219.233.497.0210.6617.670.92N33()0.9222.2123.134.040.6118.8419.453.180.9215.3216.240.981.2222.6023.824.340.91518.3519.263.551.2215.0916.310.69%98.25—66.5229.7498.65—72.1851.7598.00—73.6189.812.3　　　3,,,.PAOsDNPAOs,.Wachtmeister[13]Meinhold[15].,[16].0、20、5080d,6.6(a)0d,.,.120min,,180min,28.3mgL.,,480min,0.2mgL,[P(