《英语环境保护》PPT课件.ppt

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1、没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任1Environmental science and engineeringAmosThomasDemonTEAM:408没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任2023/3/21These are the ideal environmentThese are the ideal environmentthat we that we dreamdream to live in to live in.没有明确的价值取向和人

2、生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任2023/3/21Wake up!These are the environment we live in now!没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任2023/3/21 pollutions没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任Water pollutionWater pollution is the contamination of water bodies suc

3、h as lakes,rivers,oceans,and groundwater.Water pollution没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任The heavy smoke piped from the factory chimneys.Air pullutionAutomobile exhaustAutomobile exhaust没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任The noise pollution没有明确的价值取向和人生目标，实现自我人

4、生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任The rubbish we produced没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任The White pollution 没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任In my wordsThe environment is the world we live in,and the na

5、tural surroundings.Every time we spread our citys,every garbage we produce,every drop of water we pollute，we hurt our“mother nature”.没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任We rely on the Earth for everything we need to survive,so lets take care of it.没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就

6、是人生目标，就是人生责任。每承担一次责任We cant live without water,but now the water was polluted.It is the biggest problem.It influences our daily life.So we should find a way to solve this problem.没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任14 Water Treatment Processes Water Treatment Processes没有明确的价值取向和人生目

7、标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任15Water Treatment没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任16 Water treatment operations fulfill one or three key tasks:removal of particulate substances such as sand and clay,organic matter,bacteria,and algae;removal of dissolved substances such

8、as those causing color and hardness;and removal or destruction of pathogenic bacteria and viruses.The actual selection of treatment processes depends on the type of water source and the desired water quality.水处理操作完成一个或三个关键任务：去除颗粒物如沙粒和粘土、有机物、水处理操作完成一个或三个关键任务：去除颗粒物如沙粒和粘土、有机物、细菌和藻类，去除溶解物质如那些产生颜色和硬度的，及除

9、去或消灭致病细细菌和藻类，去除溶解物质如那些产生颜色和硬度的，及除去或消灭致病细菌和病毒。处理工艺的实际选择依赖于水源的类型和水质要求。菌和病毒。处理工艺的实际选择依赖于水源的类型和水质要求。没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任17Screening to remove large solids such as logs,branches,rags,and small fish is the first stage in the treatment of water.Allowing such debris into th

10、e treatment plant could damage pumps and clog pipes and channels.For the same reasons,water intakes are located below the surface of the lake or river in order to exclude floating objects and minimize physical damage from ice.格栅是水处理的第一阶段，它能去除大块固体例如木头、树枝、破布和小格栅是水处理的第一阶段，它能去除大块固体例如木头、树枝、破布和小鱼。这些垃圾进入处理

11、厂会损害水泵并堵塞管道。同理，入水口设置在湖鱼。这些垃圾进入处理厂会损害水泵并堵塞管道。同理，入水口设置在湖泊或者河流表面以下，以排除漂浮物并最小化冰块的物理破坏。泊或者河流表面以下，以排除漂浮物并最小化冰块的物理破坏。没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任18SedimentationSedimentationSedimentation,the oldest and most widely used form of water and wastewater treatment,uses gravity settling t

12、o remove particles from water.It is relatively simple and inexpensive and can be implemented in basins that are round,square,or rectangular.As noted earlier,sedimentation may follow coagulation and flocculation(for highly turbid water)or be omitted entirely(with moderately turbid water).沉淀是水和废水处理中最古

13、老和应用最广的方法，利用重力沉淀去除水中颗沉淀是水和废水处理中最古老和应用最广的方法，利用重力沉淀去除水中颗粒物。它相对简便、廉价，可用通过圆形、方形或者矩形的水池来实现。如粒物。它相对简便、廉价，可用通过圆形、方形或者矩形的水池来实现。如前所述，沉淀池跟在混凝和絮凝（对于高度浑浊的水）或者被完全省略（中前所述，沉淀池跟在混凝和絮凝（对于高度浑浊的水）或者被完全省略（中度浑浊的水）。度浑浊的水）。没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任19Coagulation/flocculationCoagulation/floccula

14、tion Coagulation/flocculation is a chemical-physical procedure whereby particles too small for practical removal by plain sedimentation are destabilized and clustered together for faster settling.A significant percentage of particulates suspended in water are so small that settling to the bottom of

15、a tank would take days or weeks.These colloidal particles would never settle by plain sedimentation.混凝混凝/絮凝是一种化学物理过程，那些太小的用简单沉降法不能去除的颗粒絮凝是一种化学物理过程，那些太小的用简单沉降法不能去除的颗粒物会在这个过程中变得不稳定形成凝块，从而能较快的沉淀。水中大部分悬物会在这个过程中变得不稳定形成凝块，从而能较快的沉淀。水中大部分悬浮颗粒物太小，沉淀到水池底部会用数天甚至数周。这些胶体颗粒永远不会浮颗粒物太小，沉淀到水池底部会用数天甚至数周。这些胶体颗粒永远不会自然沉

16、淀。自然沉淀。没有明确的价值取向和人生目标，实现自我人生价值就无从谈起。人生价值就是人生目标，就是人生责任。每承担一次责任20DisinfectionDisinfectionTo ensure that water is free of harmful bacteria it is necessary to disinfect it.Chlorination is the most common method of disinfecting public water supplies.Sufficient quantities of chlorine from chlorine gas or

17、hypochlorites are added to treated water to kill pathogenic bacteria.Chlorination is a reliable,relatively inexpensive,and easy disinfection method to use.为确保水中没有有害细菌，消毒是必须的。氯化处理是消毒公共水源最常用为确保水中没有有害细菌，消毒是必须的。氯化处理是消毒公共水源最常用的方法。将氯气或次氯酸盐中足量的氯加入处理的水中杀死致病细菌。氯化的方法。将氯气或次氯酸盐中足量的氯加入处理的水中杀死致病细菌。氯化处理是一种可靠的、相对廉价、容易使用的消毒方法。处理是一种可靠的、相对廉价、容易使用的消毒方法。