吹脱去除氨氮99a4b933c77da26925c5b0f5

93Vol．9No．320153ChineseJournalofEnvironmentalEngineeringMar．20151111222221．2000902．201203、pH、、pH。pH。pH。Ca2+CaCO3。X703A1673-9108201503-1093-05AmmoniaremovalbyairstrippingforrejectwaterfromadvancedsludgedewateringprocessZhouZhen1HuDalong1GuYuting1QiaoWeimin1DuXingzhi2LiZhen2JiangLingyan2WeiHaijuan2LüYan21．CollegeofEnvironmentalandChemicalEngineeringShanghaiUniversityofElectricPowerShanghai200090China2．ShanghaiChentouWastewaterTreatmentCo．Ltd．Shanghai201203ChinaAbstractＲejectwaterfromadvancedsludgedewateringprocesswascharacterizedbyhighconcentrationsofammonianitrogenhighpHandhighalkalinity．Theeffectsofair-liquidratiotemperatureandstrippingtimeontheremovalofammonianitrogenfromtherejectwaterwereinvestigatedandthephenomenaofpHdecreaseandscalingduringthestrippingprocesswereanalyzed．HighpHandhighalkalinityoftherejectwaterwerecon-ducivetotheprogressofstrippingwhiletheincreaseofair-liquidratioandtemperaturecouldbothimprovethestrippingefficiency．AmmoniaairstrippingalsoresultsinthesimultaneousdecreaseofpHandCa2+concentra-tion．ThedecreaseofpHwasinfavorofsubsequentbiologicaltreatmentoftherejectwaterwhilethelatterde-creasecausedtheprecipitationofCaCO3inthestrippingequipment．Keywordsrejectwaterammonianitrogenstrippingadvancedsludgedewateringscaling8632012AA063403122505009002014－02－122014－03－011981—。[e-mail]。80%1。、60%2。50%。、。FeCl32-5。、、、6-89。6、910、11、12、13。。、9pH。11．11500t/d80%、、。93%CaO20%FeCl38%60%。5000m3/d。1．21。20cm42cm1L。pH。Ca2+。1Fig．1Deviceofammoniastrippingforrejectwater1．3COD、、14。CODSCOD0．45μmCOD。pHPHB-1pHUnico2802。Ca2+Shimadzu7510EDSHitachiSU1500。1．41．4．171115。Ct=C0exp－KT1CtC0tmg/LKh－1Th。1lnCt/C0=－KT21．4．2NH+4NH3NH+4+OH－=NH3+H2O312CFA=1714KhCNHKh+1014－pH4CFACNHmg/L。Kh16lnKh=32．24－6344/273．15+t5t℃。54CFA=1714CNH10pHe6344273．15+t+10pH622．11。1pHCOD、。CODSCOD57．8%90．1%。SCODC/N11．81718。pH-710。1Table1CharacteristicsofrejectwaterfromBailonggangadvancedsludgedewateringsystempHCODmg/LSCODmg/Lmg/Lmg/LmgCaCO3/L12．8375444362308．5368．635780．431374130658．075．51022。βpHβ=－dC/dpH7Cmol/L。pH2。2pH9．0～13．0、6．0～9．04．3～6．0β17．11、1．65490132pHFig．2pHtitrationandbuffercapacityofrejectwaterfromadvancedsludgedewateringprocess4．72mmol/L。。12．1～13．0β30．11mmol/L。18。2．220℃pH14．3pH3。3a。3bpH。NH33OH－。CO2pH19。620℃pH＞10．0NH380%pH1。720、1500、30003600m3/m3·hK0．16、0．25、0．540．57h－1Ｒ20．96。K3000m3/m3·h。710。2．33600m3/m3·hpH14．3pH4。4pH。16、20、253pHFig．3AmmoniaremovalkineticsandpHvariationsofrejectwaterbyairstrippingatvariousair-liquidratios30℃1h46．3%、49．2%、55．8%65．1%pH11．45、10．74、10．449．36。6。20。pH＞10．016、20、2530℃K0．38、0．50、0．620．70h－1Ｒ20．95。4aKK=0．0237T+0．0062Ｒ2=0．98098。2．43000m3/m3·h25℃SEMEDS5。590194pHFig．4AmmoniaremovalkineticsandpHvariationsofrejectwaterbyairstrippingatvarioustemperaturesCa、CO15．31%、20．91%63．00%CaCO3。SEM。CO。Ca2+2。pH=8．04b2Ca2+。Ca2+。5000m3/d20℃Ca2+813mg/LCaCO310．2t/d。CO272122。、7。5SEMEDSFig．5SEMimageandEDSanalysisofsedimentsofrejectwaterafterairstripping2Ca2+Table2ConcentrationsofCa2+insludgewaterunderdifferentwatertemperatures℃16202530Ca2+mg/L33142492250526372537Ca2+mg/L·h—234．9269．7270．8518．031、pH、。pH10。260%pH9．0。3、pH。。4CaCO3。690131TchobanoglousG．BurtonF．L．StenselH．D．WastewaterEngineeringTreatmentandＲeuse4thed．．NewYorkMetcalf＆EddyIncorporation20032．．201127883-85ChenBoxiaoZhangChenWangGuohuaetal．Applica-tionofadvancedsludgedewateringprocessatQigeWWTPHangzhou．ChinaWater＆Wastewater201127883-85inChinese3．．2010265138-140XieXiaoqingHuangZhenyiDaiLanhuaetal．StudyondeepdewateringandrecyclingofmunicipalsludgeinXia-men．ChinaWater＆Wastewater2010265138-140inChinese4．．201137540-43KeMingyong．Probeintoadvancedsludgedewateringtechnol-ogyinJimeiwastewatertreatmentplant．Water＆WastewaterEngineering201137540-43inChinese5．．2012682787-2792YaoMengChengGuodanXieXiaoqingetal．Mechanismofchemicalconditioningforsludgedewateringinamunicipalwastewatertreatmentplant．ChineseJournalofEnvironmen-talEngineering2012682787-2792inChinese6OzturkI．AltinbasM．KoyuncuI．etal．Advancedphysico-chemicaltreatmentexperiencesonyoungmunicipallandfillleachates．WasteManagement2003235441-4467QuanXuejunWangFupingZhaoQinghuaetal．Airstrippingofammoniainawater-spargedaerocyclonereac-tor．JournalofHazardousMaterials20091702-3983-9888．UASB-FEO--CASS．20104139-43XiongHongbinGuLiangpingZhangZheng．ApplicationofUASB-FEO-ammoniastripping-CASSprocessintreat-mentoflandfillleachate．ChineseJournalofEnvironmentalEngineering20104139-43inChinese9BonmatíA．FlotatsX．Airstrippingofammoniafrompigslurrycharacterisationandfeasibilityasapre-orpost-treatmenttomesophilicanaerobicdigestion．WasteMan-agement2003233261-27210GutinS．Marinsek-LogarＲ．EffectofpHtemperatureandairflowrateonthecontinuousammoniastrippingoftheanaerobicdigestioneffluent．ProcessSafetyandEnvi-ronmentalProtection201189161-6611ZhangLeiLeeY．W．JahngD．Ammoniastrippingforenhancedbiomethanizationofpiggerywastewater．JournalofHazardousMaterials2012199-20036-4212AlitaloAKyrAAuraE．Ammoniastrippingofbiologi-callytreatedliquidmanure．JournalofEnvironmentalQuality2012411273-28013DelaＲubiaM．á．WalkerM．HeavenS．etal．Pre-liminarytrialsofinsituammoniastrippingfrom