给排水专业英语Unit3ppt课件.ppt

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1、SpecializedEnglishforWaterandWastewaterEngineering给排水专业英语1Lesson3WastewatercollectionandSewerageSystemDesign污水收集与排水系统设计23.1WordsandexpressionsReviewchlorination氯化格栅barscreenaeration曝气sedimentation沉淀clarification澄清saturation饱和度，（达到）饱和状态消毒disinfections

2、toragereservoir贮水池streetlayout街道布局extract抽出，吸取环状管网loopsystem33.2NewwordsandexpressionsDomesticwastewater生活污水Drainagesystem排水系统Combinedsewers合流制Separatesewers分流制Untreatedwater未处理水Finishedwater出水Organicpollutant有机污染物Biochemicaloxygendemand(BOD)生化需氧量43.

3、2NewwordsandexpressionsDepletion消耗，损耗Sludge污泥Receivingwater收纳水体Exfiltration漏出、渗漏Nitrification硝化作用Denitrification反硝化作用Eutrophication富营养化53.3Importantsentences1.(第一段)Wastewatermaybeclassifiedintothefollowingcomponents:Domesticorsanitarywastewater.Wast

4、ewaterdischargedfromresidences,commercial(e.g.,banks,restaurants,retailstores),andinstitutionalfacilities(e.g.,schoolsandhospitals)Industrialwastewater.Wastewaterdischargedfromindustries(e.g.,manufacturingandchemicalprocesses).Infiltrationandinflow

5、.Waterthatentersthesewersystemfromgroundwaterinfiltration,stormwaterthatentersfromroofdrains,foundationdrains,andsubmergedmanholes.④Stormwater.Runofffromrainfallandsnowmelt..生活污水译：污水可分为以下几组分:①生活污水。从住宅，商业体（如银行，餐馆，零售商店）和公立机构（如学校和医院）排放的污水。②工业废水。从工厂（制造业和

6、化工）排放的污水。③渗透和入流。由渗透进入排水系统的地下水和由雨水斗，基础排水沟和淹没的人孔进入排水系统的雨水。④雨水。下雨和雪融引起的地表径流。制造业，工业住宅融化，溶解63.3Importantsentences1.(第四段)Thedepletionanddegradationofurbanwaterresourcesrecentlyhasledtotheadvocacyofasustainableurbanwatersystem,characterizedbylowerwaterconsu

7、mption,preservationofnaturaldrainage,reducedgenerationofwastewaterthroughwaterconservationandreuse,advancedwaterpollutioncontrol,andpreservationand/orenhancementofthereceivingwaterecosystem.消耗，枯竭译：城市水资源的枯竭和退化近来推动了可持续发展城市水系统的发展，其主张低水耗，自然排水保护，通过水资源保护和再

8、利用减量废水，先进的水污染控制和水生态系统保护和优化。NewWords&Expressions:sustainable可持续的preservation保护保存制造业，工业恶化，毁坏融化，溶解73.3Importantsentences1.(第五段)BasicelementsoftheurbanwatersystemareshowninFigures5.1(a)and5.1(b).Threemajorwaterpollutioncontrolcomponentsareidentified;urba