污水处理外文翻译带原文

Study on Disinfection and Anti – microbial Technologies for Drinking WaterZHU Kun, FU Xiao Yong(Dept

StudyonDisinfectionandAntimicrobialTechnologiesfor – DrinkingWater ZHUKun,FUXiaoYong (Dept.ofEnvironmentalEngineering,LANZhouRailwayUniversity,LANZhou, China) Abstract:Disinfectionby-productsproducedbythereactionbetweenchlorine anddissolvedorganiccompoundsandotherchemicalsareconsideredasaworrying probleminthedrinkingwatertreatmentprocesssinceaseriesofmutagenic carcinogensubstancesareformedincludingtrihalomethanes(THMs).Amongthe testeddisinfectants(chlorine,ozone,chlorinedioxide,potassiumpermanganate, chloraminesandhydrogenperoxideetc.),chlorinedioxidehasprovedtobethemost feasibleandeffectiveoxidantfordrinkingwatertreatmentandremovalofpathogens duetoitsoxidationefficiency,lowcostandsimplewayofutilization.Aseriesof experimentsindicatethatchlorinedioxidecansignificantlyrestrainproductionof trihalomethanes(THMs)andcontrolbacteriagrowthparticularlyforCryptosporidium oocysts.Theexperimentsverifiedthatbothozoneandchlorinedioxideareabsolutely vitaltoensurethtionofwaterstoragearedestroyed.Thepaperdiscussesoxidation capacityofchlorinedioxide,especiallyforremovingpetroleumcompounds,whichis affectedbyreactiontime,gasinjectionway,andpHoftreatedwater. Keywords:disinfection;oxidants;watertreatment;pathogens;chlorinedioxide CLCnumber:X523Documentcode:A 1Introduction ChemicalandfiltrationprocessesaretwomainmethodsusedinChinafor treatingdrinkingwatermeanwhileUVradiationhasbeenusedsuccessfullyforwater treatmentwithrelativelylowflowrate.Ontheindividualfamilylevel,usually chemicaltreatmentisafeasiblealternative.Thefollowingguidelinesexistforthe selectionofsuitablalofcontaminantsshouldbedonebydecomposition,evaporation orprecipitationetc,toeliminateordecreasethetoxicity,oxidantsorreaction