低氧污泥丝状菌膨胀的呼吸图谱特征分析马智博

38920179ENVIＲONMENTALSCIENCEVol．38No．9Sep．201711*12111．7100552．7050．SBＲDO．DOSOUＲeSOUＲnSOUＲcKODOSOUＲnSOUＲcCODKSKODODO“”．．X703.1A0250-3301201709-3801-06DOI10．13227/j．hjkx．2017010822017-01-112017-04-012015-K63-2016063SF/SF091991～[e-mail]*[e-mail]haracteristicsofFilamentousBulkingCausedbyLowDissolvedOxygenMAZhi-bo1LIZhi-hua1*YANGCheng-jian1HEChun-bo2QIULiang1ZHANGJing11．KeyLaboratoryofNorthwestWaterＲesourceEnvironmentandEcologyMinistryofEducationSchoolofEnvironmentalandMunicipalEngineeringXi'anUniversityofArchitectureandTechnologyXi'an710055China2．DepartmentofCivilandEnvironmentalEngineeringNorwegianUniversityofScienceandTechnologyTrondheim7050NorwayAbstractThecurrentresearchonfilamentousbulkingfocusesontheeffluentqualityandthesettlingpropertiesbutthereportsonthemicrobialphysiologyunderfilamentousbulkingconditionsareseldom．Inthisstudythevariationsintherespirogramofmicroorganismsandaffinitycoefficientduringfilamentousbulkingwereexploredinasequencebatchreactor．Lowdissolvedoxygenregardedasthetypicalreasonforfilamentousbulkingwasappliedasthestimulationmethod．TheresultsshowedthatmicroorganismsenteredthephysiologicaladaptationstageintheearlyperiodoflowDO．Thefollowingpropertieswereobservedinthesystem①asuddenincreaseintheendogenousspecificoxygenuptakerateSOUＲeofactivatedsludge②anabruptdecreaseinthespecificoxygenuptakerateSOUＲnofautotrophicbacteria③arapidincreaseafteraslightdeclineinthespecificoxygenuptakerateSOUＲcofheterotrophicbacteriaandasuddenincreaseintheoxygenaffinitycoefficientKO．HowevermaintainingthelowDOlevelswoulddeterioratetheeffluentqualityandsedimentationpropertiesbuttheSOUＲnandSOUＲccouldrecovertohigherlevelsafterawhileandtheCODaffinitycoefficientKSandKOwoulddecreasegradually．InlowDOconditionsasufficienthydraulicretentiontimewillbenefittheeffluentqualityfromatheoreticalpointofview．MoreovermicroorganismscouldadapttolowDOconditionswhichverifiesthefeasibilityof“lowoxygenaerationtheory”fromtherespirationandkineticparameters．Theresultsfromthisstudyprovideatheoreticalsupportforenergysavingsofsewagetreatmentplantoperations．Keywordslowdissolvedoxygenfilamentousbulkingrespirogramspecificoxygenuptakerateaffinitycoefficient1、、．DO、23、F/M、、pH4．DO、．Insel5DO0.3mg·L－167．．838OUＲ．910．Friedrich11Pala-Ozkok12OUＲErgn13OUＲ．14．、、．DO、、、、DODO．11.1SBＲ20±1℃．PLC、、．10L4L．6h4min184min58min4min．DOpH7.0～8.0．1.2NaAcNH4ClKH2PO4．COD600～750mg·L－1NH+4-N60～70mg·L－1PO3－4-P6～8mg·L－10.4mL·L－1．0.15g·L－1H3BO30.03g·L－1CuSO4·5H2O0.18g·L－1KI0.12g·L－1MnCl2·4H2O0.06g·L－1Na2MoO4·2H2O0.12g·L－1ZnSO4·7H2O0.15g·L－1CoCl2·6H2O1.54g·L－1FeSO4·7H2O12.74g·L－1EDTA．A2/OMLSS4000mg·L－1．1.3DO、、pH、．DODO0.5mg·L－1．1.4DOpHHQ40dDOHACHCOD、NH+4-N、NO－3-N、NO－2-N、、MLSSSVI15．．Nikon90iNikon．OUＲenc、OUＲe、OUＲn、OUＲc4OUＲen=OUＲe+OUＲnOUＲenc=OUＲe+OUＲn+OUＲc．WBM450．①0.3L0.9LPBS32h②DO7mg·L－1DOOUＲOUＲe③NH4Cl②OUＲen④NaAc②OUＲenc．OUＲnOUＲc4．pHHClNaOHpH．SOUＲSOUＲ=OUＲ/MLSS．CODKS、KO1617．22.1DO2～4mg·L－1SVI．SVI200mL·g－1．6d208390～0.5mg·L－1DO1．2DOSVI200mL·g－1400mL·g－1MLSS4000mg·L－12000mg·L－1．aDObDO100μm1Fig．1Morphologyofsludge2DOFig．2Settlingpropertiesofthelowoxygenprocess、DO．3DOCOD、NH+4-N、COD90%40%NH+4-N10%．NH+4-N＞＞COD．NO－3-NDO．Guo18DO．Fan19DO．．DO．2.2DO3DOFig．3Variationineffluentqualityinthelowoxygenprocess．4DO．SOUＲeO2/SS4a0.496±0.098mg·g·h－11.488mg·g·h－131.241±0.101mg·g·h－1．DO308338．DOSOUＲe4c．SOUＲe2021NaClOOUＲeOUＲe/OUＲt．．DO4bSOUＲn1.219±0.167mg·g·h－10.168mg·g·h－11.231±0.190mg·g·h－1．SOUＲcDO10d．SOUＲencSOUＲc．4dSOUＲnDO．DOSOUＲcDO．SOUＲc2223．NH+4-N．a、bDOc、d4DOFig．4VariationofrespirograminthelowoxygenprocessDOSOUＲeSOUＲn24．DODO．Park25DODO0.12mg·L－1．CODNH+4-NDO．26．2.3DO5DOKO0.096±0.013mg·L－1DOKO0.134mg·L－10.073±0.00540839mg·L－1DO．KODODO4b、4dDO27NH+4-NCOD2223．KODO．DOKODO4b．CODKSDODOCOD．1DO．DO28．DOCODDOCOD．“DO”296．5DOFig．5Variationsintheaffinitycoefficientandsludgedensityinthelowoxygenprocess31DODO．2DODO．DO．3DO．DOKOKS“”．1MiobdzkaAWiteskaAMuszyńskiA．FactorsaffectingpopulationoffilamentousbacteriainwastewatertreatmentplantswithnutrientsremovalJ．WaterScience＆Technology2016734790-797．2XieBDaiXCXuYT．Causeandpre-alarmcontrolofbulkingandfoamingbyMicrothrixparvicella-acasestudyintripleoxidationditchatawastewatertreatmentplantJ．JournalofHazardousMaterials20071431-2184-191．3．J．20163731070-1074．DuanZHPanLMChenXOetal．ChangesofmicrobialcommunitystructureinactivatedsludgebulkingatlowtemperatureJ．EnvironmentalScience20163731070-1074．4．pHSBＲJ．2016353508-515．QuSLSunBSZhaoSHetal．pHactivatedsludgesedimentationperformanceandthestructureofthemicrobeofSBＲtechnologyJ．EnvironmentalChemistry2016353508-515．5InselGErolSvezS．Effectofsimultaneousnitrificationanddenitrificationonnitrogenremovalperformanceandfilamentousmicroorganismdiversityofafull-scaleMBＲplantJ．BioprocessandBiosystemsEngineering201437112163-2173．6GuoJHPengYZWangSYetal．Stablelimitedfilamentousbulkingthroughkeepingthecompetitionbetweenfloc-formersandfilamentsinbalanceJ．BioresourceTechnology201210317-15．7SuYMZhangYLZhouXFetal．Effectofnitrateconcentrationonfilamentousbulkingunderlowlevelofdissolvedoxygeninanairliftinnercircul