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1、外文资料翻译Oxidationditches1.IntroductionOxidationditchandcontinuouscircularaerationtank,deformationisoneoftheactivatedsludgeprocess.OxidationditchsewagetreatmenttechnologyissuccessfullydevelopedbytheDutchinthe1950sandhealthengineering.PutintouseintheNetherlandsfo
2、rthefirsttimesince1954.Duetoitsgoodeffluentwaterquality,steadyoperation,convenientmanagementandothertechnicalcharacteristics,hasbeenwidelyusedbothathomeandabroadindomesticsewageandindustrialwastewatertreatment.Thetypesoftheoxidationditchhasbeenwidelyappliedat
3、presentinclude:pass,oxidationditch,theCarrouseloxidationditch,Mr.Belloxidationditch,Toxidationditch,threegroovetypeoxidationditch,andtheintegrationofDEtypeoxidationditchandoxidationditch.Theoxidationditchbecauseofthedifferencesonthestructureandoperation,soeac
4、hhasitscharacteristics.ThispaperwillmainlyintroduceCarrousePsstructure,themechanismoftheoxidationditch,theexistencequestionanditslatestdevelopment.2.ThestructureofCarrouseloxidationditchCarrouseloxidationditchisDHVCompanydevelopedin1967bytheDutch.Onthebasisof
5、theoriginalCarrouseloxidationditchDHVEIMCOit/spatentedintheUnitedStatesCompanyandcreatedtheCarrousel2000System,realizesthehigherrequirementsofbiologicaldenitrificationandphosphorusremovalfunction.Byfartheworldhasmorethan850CarrouseloxidationditchandCarrousel2
6、000Systemisrunning.Carrouseloxidationditchwithdirectionalcontrolofaerationandagitationdevice,themixturetransferhorizontalvelocity,whichwasstirringthemixtureofcirculatingintheoxidationditchchannelsclosed・Oxidationditchhasspecialhydraulicflowstate,therefore,has
7、thecharacteristicsofboththecompletelymixedreactorandhasthecharacteristicofpushflowreactor,grooveexistsobviousdissolvedoxygenconcentrationgradient.Oxidationditchcrosssectionisrectangularortrapezoidal,planeshapeisoval,moregroovedepthisgenerally2.5〜4.5m,widthdep
8、thratiois2:1,alsohaveadepthofupto7m,ditchwateranaveragespeedof0.3m/s.Oxidationditchaerationmixingequipmenthavesurfaceaerator,aerationbrushorturntable,jetaerator,cathetertypeaeratorandrise
