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1、StudyonDisinfectionandAnti–microbialTechnologiesforDrinkingWaterZHUKun,FUXiaoYong(Dept.ofEnvironmentalEngineering,LANZhouRailwayUniversity,LANZhou,China)Abstract:Disinfectionby-productsproducedbythereactionbetweenchlorineanddissolvedorganiccompoundsand
2、otherchemicalsareconsideredasaworryingprobleminthedrinkingwatertreatmentprocesssinceaseriesofmutageniccarcinogensubstancesareformedincludingtrihalomethanes(THMs).Amongthetesteddisinfectants(chlorine,ozone,chlorinedioxide,potassiumpermanganate,chloramin
3、esandhydrogenperoxideetc.),chlorinedioxidehasprovedtobethemostfeasibleandeffectiveoxidantfordrinkingwatertreatmentandremovalofpathogensduetoitsoxidationefficiency,lowcostandsimplewayofutilization.Aseriesofexperimentsindicatethatchlorinedioxidecansignif
4、icantlyrestrainproductionoftrihalomethanes(THMs)andcontrolbacteriagrowthparticularlyforCryptosporidiumoocysts.Theexperimentsverifiedthatbothozoneandchlorinedioxideareabsolutelyvitaltoensurethtionofwaterstoragearedestroyed.Thepaperdiscussesoxidationcapa
5、cityofchlorinedioxide,especiallyforremovingpetroleumcompounds,whichisaffectedbyreactiontime,gasinjectionway,andpHoftreatedwater.Keywords:disinfection;oxidants;watertreatment;pathogens;chlorinedioxideCLCnumber:X523Documentcode:A1 IntroductionChemicaland
6、filtrationprocessesaretwomainmethodsusedinChinafortreatingdrinkingwatermeanwhileUVradiationhasbeenusedsuccessfullyforwatertreatmentwithrelativelylowflowrate.Ontheindividualfamilylevel,usuallychemicaltreatmentisafeasiblealternative.Thefollowingguideline
7、sexistfortheselectionofsuitablalofcontaminantsshouldbedonebydecomposition,evaporationorprecipitationetc,toeliminateordecreasethetoxicity,oxidantsorreactionby-productsshouldnotbeharmfultohumanhealth,andthepurificationprocessesshouldbepracticalandeconomi
8、cal.Theobjectiveofthispaperistoevaluateanddiscussavailabledisinfectantsfordrinkingwatertreatment.Thedifferentdisinfectantsarecomparedregardingpurificationefficienciesandapplicationapproaches.2 ComparisonofO3>ClO2>HOCl>OCl->NHCl2>NH2ClRe
