常温下低DO和高pH短程硝化过程研究傅金祥

NO3--NNO3--NN2TN。NO2--NNO2--NN2[1-2]。[3]25%40%C/NTN50%。、、30～36℃、pH7.5。DOpH[4-5]。DOpH。(23℃)pH。11.11。1.2(SequencingbatchreactorSBR)12LDO23±1℃。SBR、、、5。30s、6h、20min、5min。DOpH11234511101682.4000453.06300041300215.063000SBRDOpHDOpH、NO2--N。DOpHNO2--NpH=7.5DO=0.84mg·L-1、0.52mg·L-1NO2--N73%、90%DO=0.52mg·L-1pH=7.5、8.5NO2--N90%、96%。。SBRTQ424A1000-3700(2008)12-019-042008-03-271955-13889122866E-mail:[e-mail]。CODTNNH4+-NNO2--NNO3--N100～20022.3～32.650～700.02～0.920.26～1.961／mg·L-1Table1originalwaterquality3412200812TECHNOLOGYOFWATERTREATMENTVol.34No.12Dec.,200819DOI:10.16796/j.cnki.1000-3770.2008.12.0061.3[6]CODNO2--NN-1--NO3--NMLSSpHDODO。。22.12.1.1、、HRT6h、150L·h-1DO2mg·L-1、pH7.510。1。1NO2--N1.78mg·L-1NO3--N23.53mg·L-1NO2--N7%50%。2.32mg·L-1·h-110mg·L-1。。2.1.250L·h-1DO0.84mg·L-1,NO2--N2。26.23mg·L-1NO2--N30.83mg·L-1NO3--N11.8mg·L-1NO2--N73%50%。88%2.25mg·L-1·h-1。2.1.3DO50、30L·h-1DO0.84、0.52mg·L-1、NO2--N、NO3--N3。DO0.84mg·L-10.5mg·L-16.23mg·L-110.38mg·L-12.25mg·L-1·h-12.18mg·L-1·h-1DODO。NO2--NDO0.84mg·L-10.52mg·L-1NO2--N30.83mg·L-142.11mg·L-1DONO2--N。NO3--NDODO0.84mg·L-10.52mg·L-1NO3--N11.8mg·L-14.64mg·L-1NO2--N73%90%。(KN=0.2～0.4mg·L-1)(KN=1.2～1.5mg·L-1)DODONO2--NNO3--N0123456701020304050607080
 3DOFig.3EffectofDOchangeonNcontent01234560102030405060
 2Fig.2ChangeofNcontentinsub-nitrationprocess01234560102030405060
 1Fig.1ChangeofNcontentinperiod341220NO2--N。DONO2--N。2.2pH2.2.1pH30L·h-1pH、NO2--N、NO3--N4。455mg·L-1NaHCO3pH7.58.56h2.18mg·L-1·h-12.30mg·L-1·h-1pHOH-NH4+。NO2--NpH7.58.5NO2--NpHpHpH。NO3--NpHNO3--NNO3--N4.64mg·L-11.63mg·L-1pH。pHpHpHFAFA0.6mg·L-1FAFA5mg·L-140mg·L-1。pH7.5～8.5SBRNO2--N。2.2.2pHpH5。530minpH7.37.860min,90min270min7.4。30minpHCODCO2CO2pH。pHCODCO2。4pH。2、NO2--N、NO3--N60.04mg·L-14h48.05mg·L-112mg·L-120%。、pH、4h4%。。3DODOpH。DONO2--NDO=0.52mg·L-1DO=0.84mg·L-1NO2--N15%。pHNO2--NpH=8.5NO2--N96%。。4pHFig.4EffectofpHonNcontentinsystem01234567010203040506070
mgLt0601201802403003607.27.47.67.88.0pH
min5pHFig.5ChangeofpHinsub-nitrationprocess21ADVANCEINREMOVALOFHEXAVALENTCHROMIUMBYLOW-COSTBIOSORBENTSCHENGuan-lan,CHENYin-guang(StateKeyLaboratoryofPollutionControlandResourcesReuse,TongjiUniversity,Shanghai200092,China)Abstract:Nowadays,withtheexponentiallyincreasingpopulationtheneedforcontrollinghexavalentchromiumemissionsintotheenvironmentisevenmorepronounced.Accordingtotheeconomicfeasibility,low-costbiosorbentsaregainedmoreattention.Applicationprogressofbiosorbentsinpurifi-cationofwastewatercontainingchromiumcompoundswasreviewedanditsmechanismsaswellasfactorsassociatedwithabsorptionperformancesandwaystoimprovementsofbiosorbentswereanalyzed.Thefutureprospectiveforthetechnologydevelopmentwasgiven.Keywords:biosorbent;hexavalentchromium;low-costchromium(VI)anionicspeciessorptionontosurfactant-modifiedmontmorilloniteclay[J].JournalofColloidandInterfaceScience,2000,229(1):230-236.[32]ZLi,RSBowman.Retentionofinorganicoxyanionsbyorgano-kaolinite[J].WaterResearch,2001,35(16):3771-3776.[33]CNamasivayam,MVSureshkumar.Removalofchromium(VI)fromwaterandwastewaterusingsurfactantmodifiedcoconutcoirpithasabiosorbent[J].BioresourceTechnology,2008,99(7):2218-2225.[34]PAKumar,MRay,SChakraborty.Hexavalentchromiumremovalfromwastewaterusinganilineformaldehydecondensatecoatedsilicagel[J].JournalofHazardousMaterials,2007,143(1-2):24-32.[35]PAKumar,SChakraborty,MRay.Removalandrecoveryofchromiumfromwastewaterusingshortchainpolyanilinesynthe-sizedonjutefiber[J].ChemicalEngineeringJournal,2008,141(1-3):130-140.[36]RAnsari,NKFahim.ApplicationofpolypyrrolecoatedonwoodsawdustforremovalofCr(VI)ionfromaqueoussolutions[J].Re-activeandFunctionalPolymers,2007,67(4):367-374.STUDYONTHESHORTCUTNITRIFICATIONPROCESSUNDERLOWDOANDHIGHPHCONDITIONINNORMALTEMPERATUREFUJin-xiang1,HANJin-ying1,QIJian-hua2,SONGYu-yu3,LIUYu4,BAIXia5（1.SchoolofMunicipalandEnvironmrntalEngineering,ShenyangjianzhuUniversity,Shenyang110168,china;2.FacultyofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing400045,china;3.TangshanDivisionofUrbanDesignandResearchInstitute,Baoding063000,china;4.ChinaNortheastMunicipalEngineeringDesignandResearchInstitute,Changchun130021,china;5.HeadOfficeofHousingIndustryadjustmentEngineeringofTangshan,Tangshan063000,china;）Abstract:UsingthetraditionalactivatedsludgeasakindofdomesticatedmudsludgetodomesticintheSBRreactor,andwithsimulateddomesticwastewaterastreatmentobject,thechangesofnitrogenelementandNO2--NaccumulationrateinthesystemtypicalcyclewereinvestigatedbychangingthedynamictestsystemDOandpH,andthecausesofnitrogendeficiencyduringsystem'soperationcyclewerealsodiscussed.Theresultsshowedthat,duringStableOperationofthesystem,thesystem'sNO2--NaccumulationratecanbeimprovedbyreducingDOandenhancingpH;OnsystemcyclePe-riod,pH=7.5,DO=0.84mg·L-1、0.52mg·L-1,thedegradationrateofammonia-nitrogendidnotchangedandNO2--Naccumulatio