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2000,6(6):581585ChinJApplEnvironBiol=ISSN1006-687X2000212225:2000206209:2000209227SBR(610041).SBRSBRSBR,SBR.,NH3-N,766.54mgL-1d-1;11.0%38.7%30%40%.tHR24h,SBRIn(NH3-N)600760mgL-1,NH3-NTN98.5%98%,NH3-N.277SBR;;;CLCX780.3:X172TREATMENTOFCHEMICALINDUSTRIALWASTEWATERCONTAININGHIGHNH32NBYATWO2STAGESBRPROCESSCAIMulin,JIANGYueLin,PEIJian,GONGGe&ZHANGBenlan(ChengduInstituteofBiology,ChineseAcademyofSciences,Chengdu610041,China)AbstractThetreatmentofchemicalindustrialwastewatercontaininghighconcentrationofNH3-Nwasstudiedwithatwo-stageSBRprocess.Thereactorswerestartedbythedirectactivatedsludge.Thetwo-stageSBRprocessiscomposedofnitrificationSBRanddenitrificationSBRreactors,andsuspendedsludgeandfixedbiofilmwereusedinnitrificationSBRsystemforcomparison.TheresultsuggestedthatthelaterhadahigherNH3-Nvolumeloadingof766.54mgL-1d-1andtheconsumptionofalkaliandcarbonresourcewas11.0%38.7%and30%40%lessthanthatoftheformer.UndertheoperatingconditionoftHR24h,thetwo-stageSBRprocesscouldtreatthechemicalindustrialwastewatercontaininghighconcentrationofNH3-Nof600760mg.L-1,andtheremovalrateofNH3-N,TNwasmorethan98.5%and98%.Fig2,Tab7,Ref7Keywordstwo-stageSBRprocess;wastewatertreatment;nitrification;denitrificationCLCX780.3:X172.,,NH+4NO-X,NO-XN2,[1,2].,,.,,COD/N-NH3..SBRAB,SBR,,.SBRAB,[3].SBR.11.1SBRSBR:6L,,SBR,SBR(SBBR).SBRSBRZH-I,1538m2/m3,d=8cm,33.5cm,67cm(2).SBR:8L,,,(DO)0.5mgL-1,.1SBRFig.1Thetwo-stageSBRprocess2Fig.2Configurationofcombinedmedia1.2,1.1Table1QualitiesofchemicalindustrialwastewaterItemsCODcrBOD5NH3-NTKNTP(pH)/mgL-1220.0596.016.1246.30725.301271.20937.291890.801.223.58(9.010.5)1.3CODcrTKNTNNH3-NNO2-NNO3-N,[4].1.41.4.1SBR.,,SBRI.(NH3-N),70mgL-1280mgL-1,.(tHR)20h36h,2128d,,NH3-N.1.4.2SBR,.14d,NO-X87.5%.285622.1SBRSBR2.2SBRTable2Theoperationalparametersofthetwo-stageSBRprocessTypeofreactorsOperatingstagesInfluentAerationSettleEfluentt/hCyclet/hDischangingratioMLSS/gL-1/pHSBRNitrifiationSBRmodelreactor10.5520.581/2.54.31257.5-8.020.5830.5121/2.55.84257.5-8.0SBRNitrifiationSBRmodelreactor10.5610.581/20.40310.243257.5-8.020.51010.5121/20.56311.363257.5-8.0SBRDenitrificationSBR0.510.512-243/414.06257.0-7.530.400.56MLSS,10.2411.36MLSS(0.40and0.56aresuspendedgrowthMLSS,10.24and11.36areattachedgrowthMLSS.)2.2SBR,(NH3-N).SBR,CODcr/TKN0.51.0,CODcr,.5%NaH2PO4TKN:TP=20:1TP,.NH3-N1421d,3.3SBRTable3TheconversionbetweenthenitrogencompoundsinthenitrificationSBRmodelIreactorOperatingstagesNo.(NH3-N)/mgL-1(NO2-N)/mgL-1(NO3-N)/mgL-1(TN)/mgL-1NaHCO33NaHCO3requirementInEfRE/%InEfInEfInEfRE/%/mLL-1174.030.5899.200.0603.21183.1235.7780.55.02142.130.9199.300.47038.48213.6584.4060.510.4Stage13200.590.6299.709.300145.67434.00224.1448.420.84320.6039.9887.5013.040214.25503.44387.9822.929.25416.644.0399.103.780284.56582.41349.3440.033.36548.801.0199.805.700375.32632.10442.5330.050.0Stage27641.209.5998.5049.940442.20847.20550.0935.162.58730.20157.6978.4092.630361.54894.15670.2625.085.4In=InfluentEf=EffluentRE=RemovalEfficiency(Thesamebelow)(NaHCO3)=50gL-1(Thesamebelow)3,In(NH3-N)320.60mgL-1,T=8h,,Ef(NH3-N)39.98mgL-1,,(tHR).T=12h,In(NH3-N)641.20mgL-1,Ef(NH3-N)9.59mgL-1,98.5%,NO-2.In(NH3-N)730.20mgL-1,NH3-N,Ef(NH3-N)157.69mgL-1,NO-2,.,,SBRNH3-N.2.3SBRSBR,(NH3-N)1421d,4.4,SBR,Ef(NH3-N)12mgL-1,98.5%,In(NH3-N)820.40mgL-1,Ef(NH3-N)106.82mgL-1,NH3-N3856:SBR,.,NO-2,NO-X70%80%,NO-3.,DO,DO,(DO),.,NH3,NO-2.4SBRTable4TheconversionbetweenthenitrogencompoundsinthenitrificationSBRmodelIIreactorOperatingStagesNo.(NH3-N)/mgL-1(NO2-N)/mgL-1(NO3-N)/mgL-1(TN)/mgL-1NaHCO3NaHCO3requirementInEfRE/%InEfInEfInEfRE/%/mlL-1Stage11170.241.1399.4067.70020.38254.53120.7552.510.02220.740.8499.6098.71026.44351.71182.1448.215.03314.052.8099.10149.12050.16425.50269.3636.725.04451.921.9099.60204.80065.41513.84317.2138.330.05532.002.5299.50243.54081.24594.16382.0035.740.06646.245.4999.20334.740105.08682.40493.4027.750.0Stage27694.408.4798.80361.200127.10764.43589.8322.866.78766.5411.8198.50436.420135.60921.63656.1028.875.09820.40106.8286.90448.730121.241126.3876.7922.283.32.4SBRSBRNO-2NO-3,.((DO)0.30.5mgL-1),,.(CH3OH),.[5]:Cm=2.47[NO3-N]+1.53[NO2-N]+0.87DO:Cm(mgL-1)[NO3-N](mgL-1)[NO2-N](mgL-1)DO(mgL-1)SI:(CH3OH)=2.47(NO3-N)+1.53(NO2-N)+0.87(DO)(NOx-N),,SBR,,25,(DO)0.5mgL-1,4h,5.5SBRTable5TheoperationresultsofthedenitrificationSBRprocesstHR/h04812162024CH3OHCH3OHrequirement/mLL-1(NO2-N)/mgL-190.3852.9025.8511.43-2.360.12Nitrifyingliquidof(NO3-N)/mgL-1428.10308.55205.7096.31-24.501.980.90SBRmodelIreactor(CODcr)/mgL-11043.06919.30727.78506.02-153.4146.15(NO3-N)/mgL-1132.6363.3437.2014.70-0.810Nitrifyingliquidof(NO2-N)/mgL-1413.42257.66141.2862.62-31.623.220.57SBRmodelIIreactor(CODcr)/mgL-1736.30590.27463.78310.85-86.4331.70SBR,,N2N2O.SBRNO-2,.CODcr,,.CODcr,,.33.1SBR(1)NH3-N20%50%.48566SBRINH3-NTable6ThecomparisonofthenitrificationSBRmodelIandonNH3-NvolumeloadingNO.1234567SBRI/mgL-1d-1NitrificationSBRmodelI170.56240.71384.72331.31439.04512.96584.16SBR/mgL-1d-1NitrificationSBRmodel255.36331.11471.08451.92532.00646.24766.54(%)Outrangedpercentage(%)49.737.622.436.421.126.031.2,,.1538m2/m3,,(ML