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A,,,,(,200092):A2/O,,A,A2/O,,,,A:A2/O;;;;:X703:A:1000-4602(2009)09-0029-05Pilot2scaleStudyonPerformanceOptimizationofBailonggangWWTPYAOHai2feng,YINMing,LITian,LUBin,RUANDa2kang(StateKeyLaboratoryofPollutionControlandResourcesReuse,TongjiUniversity,Shanghai200092,China)Abstract:TheinvertedA2/Oprocesshasbeenwidelyadoptedinnewlyconstructedwastewatertreatmentplantsandthereconstructionofnitrogenandphosphorusremovalprocesses.Inpractice,theef2fluentphosphorusdoesnotalwaysmeetAlevelofthenationaldischargestandardduetounreasonableop2erationcontrolandlowcarbonsourceintheinfluent.UsinginfluentfromtheBailonggangWWTP,api2lot2scalestudywascarriedouttoinvestigatetheimpactofinternalreturnratio,aerationrateandinfluentflowdistributiononphosphorusremovalintheinvertedA2/Oprocess.Theresultsindicatethatwhentheinternalreturnratioandaerationratearelowered,andinfluentflowdistributionareadopted,betterphos2phorusremovalefficiencyisachievedonthepremiseofadequateTNremovalfromtheinfluentwithlowercarbonsource.TheeffluentqualityisabletomeetAlevelofthenationaldischargestandard.Keywords:invertedA2/Oprocess;carbonsource;phosphorusremoval;internalreturnra2tio;aerationrate:(2007-007),,[12],,,,AA2/O,[34]A2/O,2009225920095CHINAWATER&WASTEWATERVol.25No.9May2009104m3/d,,A2/O,A1111A2/O,11A2/OFig.1Pilot2scaleequipmentofinvertedA2/Oprocess,//50.7m3,,11.4111.4127.86m3,112.44,YLD,PLC,,DO,DOMLSSCODNH+4-N,,,,(20d)112,CODNH+4-N,2h;COD,NH+4-NNO-3-NTNPO3-4-PTPMLSSMLVSS;DODO,YSI550ADODODO,2h11Tab.1InfluentqualityandeffluentqualityofprimarysedimentationtankmgL-1CODBOD5NH+4-NTNPO3-4-PTPSS245.161.5102.421.322.24.028.95.71.50.32.90.6137.459.8233.169.6105.618.922.94.428.47.11.60.32.80.7115.245.91,,BOD5/TN=3.5,BOD5/TP=35.3,,,2008510,,BOD5/TNBOD5/TP,BOD5/TNBOD5/TP,MLSS2500mg/L221120d9.7h0.5,,MLSS2700mg/L,DO2.03.0mg/L22Tab.2EffluentqualityunderdifferentinternalreturnratiosT/COD/(mgL-1)TN/(mgL-1)TP/(mgL-1)1.026.5203.325.325.994.32.790.31.527.4234.421.127.434.63.380.52.029.9226.021.129.765.73.400.42.530.3264.627.721.985.12.620.43.030.9230.724.821.123.22.710.6TP203259(mgL-1)CODb/(mgL-1)CODa/CODb(CODa+CODb)COD/%1.0120.030.83.974.21.5118.427.24.462.12.0153.723.36.678.32.5171.418.89.171.93.0149.713.511.170.7:CODaCODbCOD3,,COD,1.030.8mg/L3.013.5mg/L;CODa/CODb,3.911.13TN,TN10.0mg/L1.02.5,,TN,,2.5,,3TNFig.3TNremovalunderdifferentinternalreturnratios2.02.53.0,COD,,CODCOD78.3%71.9%70.7%,,COD(COD70.0%80.0%),,TPA2/O,,,,,1.0,TNTP9.50.2mg/L,A23,1.02.021215d1012h1.50.5,,413:A2594Tab.4PerformanceunderthreeaerationratesTPTNNH3-NCOD/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%2.670.350.280.1289.3927.804.929.150.9667.0921.972.691.520.1593.07232.119.321.47.890.82.990.220.450.2185.1135.233.798.903.5274.7425.212.700.490.2398.06245.423.128.05.988.62.540.181.060.2858.3724.654.967.433.4069.8717.901.760.550.3396.93206.518.722.38.189.2:DO(0.40.6)(1.41.9)(4.75.7)mg/L,28.329.527.94,,TNCOD;NH3-N,A(NH3-N5mg/L)TP,TP0.28mg/L,90%;TP,85.11%;DO4.75.7mg/L,TP1.06mg/L,31.02%,,,DO,[5]BrdjanovicPHB,,[6],A,A2/O,,,DO,DO,,,DO1.02.0mg/L213,,30%,15dHRT910hDO1.83.1mg/L0.51.5,55Tab.5PerformancebeforeandafterinfluentdistributionTPTNCOD/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%/(mgL-1)/(mgL-1)/%3.020.150.590.1680.0534.664.4811.421.3767.05258.440.726.810.289.63.090.190.310.1189.9632.112.8310.942.2765.93275.653.829.08.089.55,TNCOD,TNCODA;TP,TP0.59mg/L0.31mg/L,9.91%,,,DO1.02.0mg/L,,,,NO-3-N,,NO-3-N,3A2/O1.02.0,TN10.0mg/L,TP0.2mg/L;2.5,,1.0(36)23259:[1],.pH[J].,1998,17(2):163-169.[2]LiXiaoYan,LoganBruce.Settlingandcoagulatingbe2havioroffractalaggregates[J].WaterSciTechnol,2002,42(3-4):253-258.[3],,.[J].,2001,21():10-16.:(1962-),,,,,:13904512510E-mail:hitlwg@126.com:2009-01-09(32)2.0DO1.41.9mg/L85.11%,TP2.99mg/L,TP0.45mg/L,DO,,DO1.02.0mg/L,30%,TP9.91%,TP0.59mg/L0.31mg/L,TN,,A2/O,HRT910h,A:,!:[1],.A2/O[J].,2006,22(16):84-86.[2],,.[J].,2008,34(1):12-15.[3],,.[J].,2008,34(4):16-19.[4],,,.//[J].,2007,23(22):61-63.[5].A2/O[J].,2007,23(20):93-97.[6]BrdjanovicD,SlametA,VanLoosdrechtMCM,etal.Impactofexcessiveaerationonbiologicalphosphorusre2movalfromwastewater[J].WaterRes,1998,34(1):200-208.:(1984-),,,,:(021)6598107015921538270:2008-12-0363259