城市污水处理技术（英文课件）

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1、AnIntroductiontoUrbanWaterandWastewaterTreatmentTechnologiesContents1.ContaminantsinWater2.ContaminantSourcesandTreatability3.BestAvailableTechnologies4.TrendofDevelopment21.ContaminantsinWater1.1TargetofWaterQualityControlWastewaterDischargeRegulationKeypoint:Protectionofhumanhealth31.2

2、CapacityofWaterEnvironmentAsimplecalculationCi:ConcentrationofcontaminantiMi:MassofcontaminantiinwaterV:WatervolumeMi0:MassofcontaminantireceivedMir:Massofcontaminantiassimilated(removed)bythewaterbodyitself(selfpurification)41.2CapacityofWaterEnvironmentWaterqualitycriteriaThisisequival

3、enttoMirisameasureoftheenvironmentalcapacityCis:StandardforcontaminantiMis:Maximumpermissiblemassofcontaminantiinwater51.3WaterEnvironmentalStandardAmericanstandard:CleanWaterAct(CWA)AmbientWaterQualityCriteriafortheProtectionofHumanHealthAquaticLifeCriteriaNutrientCriteria61.3WaterEnvir

4、onmentalStandardAmericanstandard:CleanWaterAct(CWA)TheNRWQC2002includesCriteriaforprioritytoxicpollutants:120items(15forinorganic,105fororganicpollutants)Criteriafornonprioritypollutants:45itemsCriteriafororganoleptic(tasteandodor)effects:23itemsDownloadableathttp://www.epa.gov/waterscie

5、nce/criteria/wqcriteria.html71.3WaterEnvironmentalStandardChinesestandard:EnvironmentalQualityStandardsforSurfaceWater(GB3838-2002)Fundamentalparameters(地表水环境质量标准基本项目标准限值):24itemsSupplementalparametersforsourcewaterforcommunitywatersupply(集中式生活饮用水地表水源地补充项目标准限值):5itemsSpecificparametersfo

6、rsourcewaterforcommunitywatersupply(集中式生活饮用水地表水源地特定项目标准限值):80items8表1地表水环境质量标准基本项目标准限值(单位:mg/L)9表1地表水环境质量标准基本项目标准限值(单位:mg/L)10表1地表水环境质量标准基本项目标准限值(单位:mg/L)11表2集中式生活饮用水地表水源地补充项目标准限值(单位：mg/L)12表3集中式生活饮用水地表水源地特定项目标准限值(单位：mg/L)13表3集中式生活饮用水地表水源地特定项目标准限值(单位：mg/L)14表3集中式生活饮用水地表水源地特定项目标准限值(单位：mg/

7、L)151.4PollutantsofPublicConcernIndicativeparametersSuspendedsolids:SSDissolvedsolids:TDS(salinity)Organicsubstances:COD,BOD,TOC,UV…Dissolvedoxygen:DOAcidity:pHNutrientsNitrogen:TN,NH3-N,NO3-N,NO2-N…Phosphorous:TP,Portho,Ppoly,Poranic…161.4PollutantsofPublicConcernSynthet