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1、word专业整理Applicationofmulti-soil-layersystem(MSL)inruralwastewatertreatmentAbstract:withthecontinuousimprovementoflivinginruralfarmers,thewaterconsumptionofresidentsisincreasing,ruralsewageemissionswillcontinuetoincrease,ifnottreateffectively,thewaterenvironmentinruralareaswillbeseriousdeter
2、iorated,andinfluencethelifequalityofruralresidents.Inthiscasethispaperpresentsadecentralizedsewagetreatmentsystem,multi-soil-layersystemtechnology(MSL)applicationintheruralsewagetreatment,thispapersummarizesthenewtechnology,youcanbetterunderstandandpractice,especiallyinthedevelopingcountrie
3、swhereisinneedofthistechnology.Intheforeseeablefuture,itcanprotectpublichealthandthesustainabledevelopmentoftheenvironment,anditalsoprovidesanewwayforruralsewagetreatment.Keywords:ruralsewage;multi-soil-layeringsystem;distributed学习资料整理分享word专业整理1.IntroductionInrecentyears,withthecontinuousd
4、evelopmentofeconomy,people'slivingstandardscontinuetoimprove,ruraleconomicdevelopmentisalsoveryrapid,buttheruraleconomicdevelopmentandenvironmentaldevelopmentisnotsynchronized,seriousruralwaterpollution.Whilehightechnicalsewagetreatmentplants,suchascentralizedsewagetreatmentplantsareinvolve
5、dinlargeinvestmentcosts,highoperatingcosts,Becauseofeconomicconstraints,suchsystemsarelesssuitableforlivestockfarmsandsmallcommunitiesinruralareas.Whilethemulti-media-soillayersystem(MSL)sewagetreatmentsystem,thisdecentralizedsewagetreatmentsystem,ithaslessinvestment,lowoperatingcosts,highh
6、andlingload.Besides,theutilitymodelovercomesthedefectsofthepriorsoilpercolationwhichiseasytobeblockedfromthespacestructure.Thesewagetreatmentsystemisonekindof学习资料整理分享word专业整理thepurificationtechnologyofseweragetreatmentsoildevelopedinJapanintwentiethCentury,thesoilsystemwillbemodularized,and
7、themoduleissetuparoundthewaterinthesoillayertoavoidclogging,andaddingnaturalorganicmaterialstosoilmodulescanimprovethepurificationabilityofthesystem.TheMSLsystemconsistsofaPermeablelayer(PL)andasoilmixinglayerblock(SMB),ThePermeablelayerisusuallycomposed
