土木工程专业英语课件.ppt

Lesson5EnvironmentalEngineering环境工程Newwordsandphrases:perturbationecosystemsubdisciplinedepletionanaerobicscumgreasecoagulationsedimentationemanatecolloidalfiltrationpesticideherbicidefertilizercentrifugeaquiferimpoundmentozonecarcinogeniceutrophicalgaerunoffrefusedisposal垃圾处理by-product副产品,出乎意料的结果dealwith安排,处理,涉及Environmentalengineeringisabranchofengineeringthatisconcernedwithpollutionbythestructures,machines,systems,、机械、系统,以及涉及到人类活动的过程所产生的污染有关的一个工程学的分支。ThedevelopmentofcivilizationhascausedperturbationofmuchoftheEarth’secosystem,resultinginpollutionoftheair,,造成空气、陆地和水的污染。,而且还要教育人们保护他们周围的环境免遭额外的污染。。Environmentalengineering环境工程Inmanycases,rivers,lakes,mercial,,河流、湖泊和海洋已经被由住宅、商业、和工业源点排放的废液所污染。。Bothphysical-。anicmatterthatcausesadepletionofoxygeninriversandlakes,,形成导致鱼类死亡的厌氧环境并产生有害气体。Thephysical-。Chemicaldisinfectioninactivatesbacteria,viruses,、病毒和原生动物钝化。Thephysicalandchemicalprocessesusedforremovingsolidsfromthewastestreamincludescreening,sandandgritseparation,chemicalcoagulation,、砂和粗砂分离、化学凝结和简单沉淀。Watertreatmentanddisposal水处理Biologicalprocessesincludeactivatedsludge,contacttowe