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1、外文资料翻译Oxidationditches1.IntroductionOxidationditchandcontinuouscircularaerationtank,deformationisoneoftheactivatedsludgeprocess.OxidationditchsewagetreatmenttechnologyissuccessfullydevelopedbytheDutchinthe1950sandhealthengineering.PutintouseintheNetherlandsforthefirsttimesince1954.Duetoitsgoo
2、deffluentwaterquality,steadyoperation,convenientmanagementandothertechnicalcharacteristics,hasbeenwidelyusedbothathomeandabroadindomesticsewageandindustrialwastewatertreatment.Thetypesoftheoxidationditchhasbeenwidelyappliedatpresentinclude:pass,oxidationditch,theCarrouseloxidationditch,Mr.Bel
3、loxidationditch,Toxidationditch,threegroovetypeoxidationditch,andtheintegrationofDEtypeoxidationditchandoxidationditch.Theoxidationditchbecauseofthedifferencesonthestructureandoperation,soeachhasitscharacteristics.ThispaperwillmainlyintroduceCarrousel’sstructure,themechanismoftheoxidationditc
4、h,theexistencequestionanditslatestdevelopment.2.ThestructureofCarrouseloxidationditchCarrouseloxidationditchisDHVCompanydevelopedin1967bytheDutch.OnthebasisoftheoriginalCarrouseloxidationditchDHVEIMCOit’spatentedintheUnitedStatesCompanyandcreatedtheCarrousel2000System,realizesthehigherrequire
5、mentsofbiologicaldenitrificationandphosphorusremovalfunction.Byfartheworldhasmorethan850CarrouseloxidationditchandCarrousel2000Systemisrunning.Carrouseloxidationditchwithdirectionalcontrolofaerationandagitationdevice,themixturetransferhorizontalvelocity,whichwasstirringthemixtureofcirculating
6、intheoxidationditchchannelsclosed.Oxidationditchhasspecialhydraulicflowstate,therefore,hasthecharacteristicsofboththecompletelymixedreactorandhasthecharacteristicofpushflowreactor,grooveexistsobviousdissolvedoxygenconcentrationgradient.Oxidationditchcrosssectionisrectangularortrapezoidal,plan
7、eshapeisoval,moregroovedepthisgenerally2.5~4.5m,widthdepthratiois2:1,alsohaveadepthofupto7m,ditchwateranaveragespeedof0.3m/s.Oxidationditchaerationmixingequipmenthavesurfaceaerator,aerationbrushorturntable,jetaerator,cathetertypeaeratorandris
