英文文献氧化沟工艺在污水处理中的应用与发展Word下载.docx
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ThistextexpatiatedprimarilytheCarrouseloxidizestheconstruction,craftmechanismoftheditchandcirculatetheproblemexsitedintheprocesswiththehomologousthemethodofsolution.Finally,introducetheCarrouseloxidizethelatestresearchprogressoftheditchandpointedoutthefutureandmainresearchdirection.
Keyphrase:
TheCarrouseloxidizestheditchdividedsbythephosphortakesoffthenitrogenconstructionmechanism
ApplicationandDevelopmentofCarrouselOxidationDitchProcessonWastewaterTreatment
Abstract:
Thestructureandthetechniquesofcarrouseloxidationditchprocessonnitrogenandphosphorremovalareintroducedinthispaper.Theproblemsinrunningandtheircorrespondingresolventarealsopointed.Atlast,Theauthorshowedtheuptodateresearchimprovementandthemainlyfutureresearchdire-ction.
Keywords:
Carrousel;
oxidationditch;
nitrogenandphosphorremoval;
structure;
techniques
1.Foreword
Oxidizetheditch(oxidationditch)againacontinuouscirculationspiritpond(Continuousloopreactor),isaliveanddirtymiremethodakindoftotransform.OxidizingthedirtywaterinditchhandlesthecraftberesearchedtomanufacturebythehygieneengineeringgraduateschoolofHollandinthe50'
sof20centuriessuccess.Sincein1954atDutchthrowintheusagefortheveryfirsttime.Becauseitsawaterfluidmattergood,circulatethestabilityandmanageconvenienceetc.techniquecharacteristics,alreadyatdomesticandinternationalandextensiveapplicationinlivethedirtywatertoisdirtytomanageaqueouslywiththeindustry[1].
Currentapplicationthanoxidizeextensivelytheditchtypeinclude:
The(Pasveer)oxidizestheditch,the(Carrousel)oxidizestheditch,(Orbal)oxidizestheditch,thetypeofToxidizestheditch(threeditchtypesoxidizetheditch),thetypeofDEoxidizestheditchtoturntooxidizetheditchwiththeintegralwhole.Theseoxidizetheditchbecauseofthedifferenceofesseinconstructionwithcirculating,thereforeeachcharacteristics[2].Thistextwillintroduceconstruction,mechanism,existentproblemanditslatestdevelopmentsthatCarrouseloxidizeditchesprimarily.
2.TheCarrouseloxidizestheconstructionoftheditch
TheCarrouseloxidizetheditchtoberesearchedtomanufacturebyDutchDHVcompanydevelopmentin1967.OxidizethelastthecompanyofDHVinfoundationoftheditchintheoriginalCarrouseltopermitedspeciallythecompanyEIMCOtoinventagainwithitspatentintheUnitedStatesCarrousel2000system(seethefigure),realizesthelivingcreatureofthehigherrequesttakesoffthenitrogenwithdividedbythefunctionof.Therehasbeenintheworlduptonowmorethan850CarrouselsoxidizetheditchwiththeCarrousel2000systemarecirculating[3].
Fromdiagramtherefore,theCarrouseloxidizestheditchtheusagethespiritofthatdefinitedirectioncontrolwithshakeupthedevice,facetomixwiththeliquiddeliverthelevelspeed,frombutmakedrivetheliquidofadmixturethatshakeupisinoxidizeditchshutmatchoutletcirculateflow.Thereforeoxidizetheditchhavethespecialhydraulicsflowsthe,currentcompletemixwiththecharacteristicsofthetypereactor,havethecharacteristicsthatpushtheflowtypereactoragain,theditchinsideexsitsobviouslyofdeliquescenceoxygendensitystepsdegree.Oxidizingtheditchcrosssectionisrectangleortrapezoids,theflatsurfaceshapeismanyforoval,theditchinternalwaterisdeepgeneralfor2.5~4.5m,thebreadthisdeepcomparefor2:
1,alsohavethedeepwateramountto7msof,ditchinsideaveragespeedinwatercurrentis0.3ms/s.Oxidizeditchspiritadmixtureequipmentscontainsurfacespiritmachine,thespiritofturntobrushorturnthedishandshoottoflowthespiritmachine,pipetypespiritmachinewithpromotetakecareoftypespiritmachineetc.,matchwithinrecentyearsusagestillcontainunderwaterpushmachine[4~6].
图1Carrousel2000系统平面结构图
3.TheCarrouseloxidizesthemechanismoftheditch
3.1TheCarrouseloxidizestheditchhandlesdirtyandaqueousprinciple
TheatthebeginningcommonCarrouseloxidizesthedirtywaterininsideincraftoftheditchdirectwithdirtymireinrefluxtogetherenteroxidizetheditchsystem.ThesurfacespiritmachinemakesfuseintheliquidofadmixturethedensityoftheoxygenDOincreasesabout2the3mgs/L.Underthiskindofwellthetermoftheoxygen,themicroorganismgetstheenoughdeliquescenceoxygencomesandgotodividedbytheBOD;
Atthesametime,theammoniaweretoooxidizednitratewithsecondnitrate,thistime,mixwiththeliquidbeplacedintheoxygenappearance.Inthespiritmachinedownstream,afterwatercurrentbebecomebytheswiftflowappearanceofthespiritDistrictofevenflowtheappearance,thewatercurrentmaintainsintheminimumcurrentvelocity,guaranteeingtheliveanddirtymirebeplacedinthefloatstheappearance.(averagecurrentvelocity>
0.3ms/s)Oxidizemicrobiallytheprocessconsumedtofusetheoxygeninthewater,untilthevalueofDOdeclinesforzero,mixingwiththeliquidreporttheanoxiaappearance.Versanitricthatturnthefunctionthroughanoxiaarea,mixwiththeliquidentertohavetheoxygenarea,completingoncecirculating.Thatsysteminside,theBODdeclinesthesolutionisacontinuousprocess,thenitricturnsthefunctiontoturnwiththeversanitricthefunctiontakeplaceinsamepond.Becauseofstructuralrestrict,thiskindofoxidizetheditchalthoughcanthenvalidwhereaboutsBOD,dividedbythephosphorustakeoffthenitrogenousabilitylimited[7].
Forthesakeoftheacquisitionbetterdividedbythephosphorustakeoffthenitrogenousresult,Carrousel2000systemsincreasedaoxygenDistrictbeforecommonCarrouseloxidizeditchwiththeuniqueoxygenarea.(callagainthattheversanitricinfrontturnsthearea)ThedirtymireinallrefluxesenterstheanaerobicDistrictwith10-30%dirtywater,canundertheanoxiawith10-30%carbonsourcetermcompleteremainingofdirtymireinrefluxinsidenitricacidnitrogentoversanitrictoturn,createsfortheuniqueoxygenpondofhereafteruniqueoxygenterm.Atthesametime,anaerobicDistrictinsideofconcurrentlythesexgermsconvertthedissolubilityBODVFA,thegermacquiretheVFAitsassimilationPHB,theenergysourceneededsolvesinthephosphoricwaterandcausephosphaticreleasing.TheanaerobicDistrictawaterenterstheinnerpartinstallstheuniqueoxygenareathathavethemixer,theso-calleduniqueoxygenisapondinsidetomixwithliquidsincehavenothenumeratoroxygen,alsohavenothecompoundoxygen(nitricacidroot),thehereuniqueoxygenenvironmentisnext,70-90%dirtywatercanprovidetheenoughcarbonsource,canmakethegermofreleasedthephosphoruswell.TheuniqueoxygenareaconnectsbehindthecommonCarrouseloxidizestheditchsystem,furthercompletingtodoawaywiththeBODandtakeoffthenitrogenwithdividedbythephosphorus.Finally,mixwiththeliquidtransferthedirtymireinsideinoxidizeditchenrichoxygenareaeject,whileenrichingtheoxygenenvironmentgermsurfeit,phosphorusfromthewater,ejectingthesystemwiththedirtymireinsurplus.Likethis,inCarrousel2000systems,thancompletedtodoawaywiththeBOD,CODwithtakeoffatthesametimegoodlythenitrogendividedbythephosphorus.
SynthesizinganddirtywaterintheriverCity,longsandCitydecontaminationcenter[softhedirtythefactoryofwaterinthefirstinKunmingofadoptionthatcraftshandlesthemovementresultofthefactorytherefore:
ThroughCarrousel2000systemafterhandling,theBOD,COD,SSdoesawaywiththeratetoallcometoa90%above,theTNdoesawaywiththeratecomestoa80%,theTPdoesawaywiththeratetoalsocometoa90%.
3.2TheCarrouseloxidizestheditchdividedsbythephosphorustakesoffthenitrogenousinfluencefactor.
AffectingtheCarrouseloxidizestheditchdividedsbythephosphoricfactorisdirtymire,nitratedensityandqualitydensitiesprimarily.Theresearchexpresses,beingtotalanddirtymireas11%thatahourbiggestphosphorus4%withdealisitsfuckdirtymiredealwithinliveanddirtymire,keepforthethegermphysicalendowmentmeasures,butwhendirtymireover15dhourdirtymiretheinsideisbiggesttocontaintheobviousdescentindealinphosphorus,canningnotreachthebiggestdividedingbytheresultofphosphorusonthecontrary.Therefore,prolongpersistentlythedirtymire(forexample20ds,25ds,30ds)istohavenonecessary,properchoosetousewithinthescopeof8~15d.Atthesametime,highnitratedensitywithlowqualitydensitydisadvantageindividedbytheprocessofphosphorus.
AffectingtheCarrouseloxidizestheditchtakesoffthenitrogenousandmainfactorisDO,nitratedensityandcarbonsourcedensities.Theresearchexpresses,oxidizingtheditchinsideexsitsdeliquescenceoxygendensitystepsdegreenamelythegoodoxygenareaDOattains3~3.5mgs/L,theanoxiaareaDOattains0~0.5mgs/Lisapriorconditiontotakeplacenitricturnreactionandversanitricsturnthereaction.Atthesametime,amplecarbonsourceandhigherC/theNratiobenefitstotakeofftocompletenitrogenously[7].
4.TheCarrouseloxidizesproblemandsolutionmethodsoftheditchesse.
ThoughtheCarrouseloxidizestheditchhasawaterfluidmattergood,theanti-poundsattheburthenabilitystrong,dividedbythephosphorustakeoffthenitrogenefficiency.But,inphysicallyofmovementprocess,stillexsitsaseriesofproblem.
4.1Dirtymireinflationproblem
Whendiscardtheaquaticcarbohydratemore,theN,Pconta