A2O与ALO工艺处理低CN值城市污水的对比邱兆富

A2/OALOC/N邱兆富1，王晓霞1，吕树光1，周琪2，杨殿海2(1．华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室，上海200237;2．同济大学污染控制与资源化研究国家重点实验室，上海200092)为解决A2/O工艺处理低碳氮比值城市污水时存在的脱氮除磷效果差的问题，将中试规模A2/O工艺的缺氧区及好氧区80%的容积改为低氧区，而其厌氧区按缺氧区运行，该缺氧/低氧/好氧工艺称为ALO工艺。当水温为19～23℃、进水COD为148．4mg/L、HRT为8h时，控制低氧区的DO为0．2～0．6mg/L，在ALO工艺中实现了短程硝化反硝化。当进水C/N值为3．5左右时，ALO工艺对TN的去除率为73．8%，对TN和TP的去除率比A2/O工艺分别高出30%和20%以上，但其消耗的空气量仅为A2/O工艺的50%。ALO工艺的活性污泥存在轻微的非丝状菌膨胀。A2/O工艺;ALO工艺;城市污水;低溶解氧;短程硝化反硝化X703A1000－4602201215－0012－0551108181ComparisonbetweenA2/OandALOProcessesforTreatmentofMunicipalWastewaterwithLowC/NRatioQIUZhao-fu1WANGXiao-xia1LVShu-guang1ZHOUQi2YANGDian-hai21．StateEnvironmentalProtectionKeyLaboratoryofEnvironmentalRiskAssessmentandControlonChemicalProcessSchoolofResourcesandEnvironmentalEngineeringEastChinaUniversityofScienceandTechnologyShanghai200237China2．StateKeyLaboratoryofPollutionControlandResourceReuseTongjiUniversityShanghai200092ChinaAbstractToimprovethelowefficiencyofnitrogenandphosphorusremovalfrommunicipalwastewaterwithlowC/Nratioapilot-scaleanaerobic-anoxic-oxicA2/Oprocesswasmodifiedtoan-oxic-lowoxygen-oxicALOprocess．Theanoxictankandtheoxictank80%ofvolumeoftheA2/Oprocesswereoperatedatlowoxygenlevels．Theanaerobictankwaschangedintoanoxiccondition．WhentheinfluentCODwas148．4mg/LHRTwas8handwastewatertemperaturewas19to23℃short-cutnitrificationanddenitrificationinALOprocesswasachievedbycontrollingDOconcentrationinthelowoxygentankatbetween0．2and0．6mg/L．AstheinfluentC/Nratiowasabout3．5theTNremovalrateofALOprocesswasupto73．8%andtheremovalefficienciesofTNandTPwereabove30%and20%higherthanthoseintheA2/Oprocessrespectively．ThevolumeofairconsumedbytheALOprocesswas50%ofthatbytheA2/Oprocess．Howevernon-filamentousactivatedsludgebulkingwasfoundintheALOprocess．KeywordsA2/OprocessALOprocessmunicipalwastewaterlowDOshort-cutnitri-·21·第28卷第15期2012年8月中国给水排水CHINAWATER＆WASTEWATERVol．28No．15Aug．2012ficationanddenitrification。CarreraC/N7．11。C/N7．02。40%325%。NO－2－N。NO－2－N、pH、、DO、、4～6。DONO－2－N7。A2/OA2/O。1材料与方法1.11100m3/d、。Ⅰ、Ⅱ、Ⅲ、Ⅳ7．92、6．00、18．904．62m3。2．85m2．0m。1Fig．1Flowchartofpilot-scalesystem1.21。1Tab．1CharacteristicsofinfluentwastewaterpHCOD/mg·L－1SS/mg·L－1NH3－N/mg·L－1NO－2－N/mg·L－1NO－3－N/mg·L－1TN/mg·L－1TP/mg·L－17．28～7．865～26612～4562．1～45．40～0．960～2．593．2～51．00．4～6．47．421065724．00．080．6726．72．81.3pH、DOWTW330ipHOxi330iDO。1.4A2/OA/OⅠ、ⅡⅢ、ⅣⅠR150%r100%HRT8h。A/ONH3－NTN55%、36%。Ⅰ、Ⅱ。HanakiDO0．5mg/L。DO＜0．2mg/LⅠ、Ⅱ、ⅢDO0．2～0．6mg/L。200%。ⅣDO2．0mg/L。“”NH3－N、NO－2－NNO－3－N2。760%1290%8d。NO－2－N50%8。·31·．watergasheat．com邱兆富，等:A2/O与ALO工艺处理低C/N值城市污水的对比第28卷第15期。2Fig．2VariationsofNH3－NNO－2－NandNO－3－Nduringsludgeacclimatization1.5A2/O80%//ALOⅠⅡ、ⅢⅣⅠ。A2/OALO2HRT8h100%200%。2Tab．2ProcessconditionsA2/OALO/d2314/℃21～2519～23C/N3．43．6MLVSS/mg·L－112391876SVI/mL·g－150．2206．9/d44．723．5DO/mg·L－1Ⅰ0．110．03Ⅱ0．170．21Ⅲ3．390．44Ⅳ4．573．302结果与讨论2.1A2/OALO3。A2/OALOCODCOD＜30mg/L。＞20dNH3－N＜1．5mg/L。3A2/OALOTab．3OperatingresultsofA2/OandALOprocessesA2/OALOCOD/mg·L－182．4148．4/mg·L－119．929．9/%75．979．9TN/mg·L－124．3741．20/mg·L－114．4410．80/%40．773．8TP/mg·L－12．384．01/mg·L－12．172．73/%8．832．0NH3－N/mg·L－119．4734．10/mg·L－11．420．63NO－2－N/mg·L－10．240．02/mg·L－10．107．91NO－3－N/mg·L－10．840．77/mg·L－112．131．23/%0．886．53。ALOⅡ、ⅢⅣ86．5%。Ⅰ。3Fig．3VariationsofNH3－NNO－2－NandNO－3－NalongwithHRTA2/OⅠⅠCODSCODⅡTN。ALOⅠ·41·第28卷第15期中国给水排水．watergasheat．com40%3CODSCODⅡTN4。34ALOⅡ、ⅢDOSCODSCODTNTNA2/O。C/NALOTNA2/O30%。Ⅱ、ⅢDOSCODTNⅠ。4SCODTNFig．4VariationsofSCODandTNalongwithHRT2.23A2/OSCODVFA5。5PO3－4－PFig．5VariationofPO3－4－PalongwithHRTALOⅠNO－2－N。ALOA2/OTP32%。ⅣHRTTP。2.33A2/OALO1．5mg/LTKNCOD＜30mg/LCODCODCOD/TKNCODTKN。ALOCODTKNA2/O50%。ALOA2/OALOⅠCODSCODALOⅡ、Ⅲ。2.4SVISVI50～150mL/g。2ALOSVI200mL/gA2/O4。RittmannSVI＞200mL/g9。DO。A2/OALO、。3结论19～23℃、COD148．4mg/L、HRT8hDO0．2～0．6mg/LALO。ALOTN73．8%TNTPA2/O30%20%。COD/TKNALOCODTKNA2/O50%。DOSVI(下转第20页)·51·．watergasheat．com邱兆富，等:A2/O与ALO工艺处理低C/N值城市污水的对比第28卷第15期CODTOC。②25mg/L。COD93～133mg/L100～125O3/BACCOD50mg/L5B。③。TOCUV254MW＜1ku60．7%58．8%66．8%65．7%。1．J．2009327125－127．2LiLaishengZhuWanpengZhangPengyietal．Com-parisonofAC/O3－BACandO3－BACprocessesforre-movingorganicpollutantsinsecondaryeffluentJ．Chemosphere20066291514－1522．3．/J．2009251335－37．4．—J．200824742－44．5．－J．201036888－93．6WangXGuXZhouXetal．TreatmentofwastewatercontainingacidrosereddyebybiologicallyaeratedfilterafterchemicaloxidationJ．EnvironTechnol2007288831－839．7．—J．20081216－20．8．BAF－O3－BACJ．2007375873－877．9．J．200523433－36．10．O3－GACJ．2008341046－50．1973－、。[e-mail]櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵2012－03－19(上接第15页)200mL/g。1CarreraJVicentTLafuenteJ．EffectofinfluentCOD/NratioonbiologicalnitrogenremovalBNRfromhigh-strengthammoniumindustrialwastewaterJ．ProcessBiochem200439122035－2041．2．J．200319419－22．3YooHAhnKHLeeHJetal．NitrogenremovalfromsyntheticwastewaterbysimultaneousnitrificationanddenitrificationSNDvianitriteinanintermittently-aera-tedreactorJ．WaterRes1999331145－154．4VillaverdeSFdz-PolancoFGarciaPA．Nitrifyingbio-filmacclimationtofreeammoniainsubmergedbiofiltersStart-upinfluenceJ．WaterRes2000342602－610．5．J．20001641－4．6．—J．200016229－31．7．J．200220238－