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1、外文资料翻译Oxidationditches1.IntroductionOxidationditchandcontinuouscircularaerationtank,deformationisoneoftheactivatedsludgeprocess.OxidationditchsewagetreatmenttechnologyissuccessfullydevelopedbytheDutchinthe1950sandhealthengineering.PutintouseintheNetherlandsforthefirsttimesince1954.Du
2、etoitsgoodeffluentwaterquality,steadyoperation,convenientmanagementandothertechnicalcharacteristics,hasbeenwidelyusedbothathomeandabroadindomesticsewageandindustrialwastewatertreatment.Thetypesoftheoxidationditchhasbeenwidelyappliedatpresentinclude:pass,oxidationditch,theCarrouseloxi
3、dationditch,Mr.Belloxidationditch,Toxidationditch,threegroovetypeoxidationditch,andtheintegrationofDEtypeoxidationditchandoxidationditch.Theoxidationditchbecauseofthedifferencesonthestructureandoperation,soeachhasitscharacteristics.ThispaperwillmainlyintroduceCarrousel’sstructure,the
4、mechanismoftheoxidationditch,theexistencequestionanditslatestdevelopment.2.ThestructureofCarrouseloxidationditchCarrouseloxidationditchisDHVCompanydevelopedin1967bytheDutch.OnthebasisoftheoriginalCarrouseloxidationditchDHVEIMCOit’spatentedintheUnitedStatesCompanyandcreatedtheCarrouse
5、l2000System,realizesthehigherrequirementsofbiologicaldenitrificationandphosphorusremovalfunction.Byfartheworldhasmorethan850CarrouseloxidationditchandCarrousel2000Systemisrunning.Carrouseloxidationditchwithdirectionalcontrolofaerationandagitationdevice,themixturetransferhorizontalvel
6、ocity,whichwasstirringthemixtureofcirculatingintheoxidationditchchannelsclosed.Oxidationditchhasspecialhydraulicflowstate,therefore,hasthecharacteristicsofboththecompletelymixedreactorandhasthecharacteristicofpushflowreactor,grooveexistsobviousdissolvedoxygenconcentrationgradient.Oxi
7、dationditchcrosssectionisrectangularortrapezoidal,planeshapeisoval,moregroovedepthisgenerally2.5~4.5m,widthdepthratiois2:1,alsohaveadepthofupto7m,ditchwateranaveragespeedof0.3m/s.Oxidationditchaerationmixingequipmenthavesurfaceaerator,aerationbrushorturntable,jetaerator,cathetertypea
8、eratorandris
