水处理英语演讲 ppt

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Water_Pollution水污染英文PPT幻灯片课件

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For government
1To establish the urban sewage treatment system (城市污水处理系统的建立 )
2 To restructur the Industrial（调整产业结构）
3.To develop the new water sources
There are many influence that we can’t describe them by words. So I will
show you some pictures.
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Discharging sewage into water
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Water hyacinth
水葫芦
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4.To strengthen the planning and management of water resources
5.To control the agricultural non-point source pollution （控制农业面源污染）
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For Business
1. To reduce water consumption(减少耗水量)
2. To buy equipment of sewage treatment (买污水处理设备)
3. Don‘t discharge sewage into water. (不要乱排污水)
4. To estiblish the water recycling system
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For individual
• Damage Harm to human 's health
• Destruction of Marine fishery resources and aquatic products

爱护水资源英语ppt课件

Water saving technologies
Water saving technologies, such as low flow show heads, faucet aerosols, and water saving tools, can effectively reduce water consumption without affecting daily life
03
Measures to protect water reset
Measures taken by the government
Water resource protection plans
The government should formulate comprehensive plans for the protection of water resources, including the assessment of protected areas, the regulation of water use, and the supervision of pollution sources
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The importance of water resource
Definition of water resources
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Surface water
Water found on the surface of the earth, such as rivers, lakes, and streams
Environmental protection actions
Individuals can take actions to protect the environment, such as not writing garbage into the water, not using pests or fertilizers around rivers and lakes, and planning trees to prevent soil erosion

水污染--英语课上演讲ppt文稿

Water pollution
The last drop of human, will be tears of remorse after environmental damage
PART1
1.what is the problem we are facing now?
2.Is this water in your hometown clean?
pollution which has long ignored by us.It is high time we
take actions.
知识回顾 Knowledge Review
祝您成功！
problem,water resources are so scarce, water pollution is also very serious.I want to say: when the water of life, the source of life is all dirty water, what can we drink?
In my mind, the water environment of my hometown is not as good as before, may be your hometown also faces the
same situation.
Groundwater accounts for water resources in China118citiesFra bibliotekclean
Light pollution Serious pollution
The proportion of national drinking Groundwater

给水排水专业英语课件(李田)13

Unit 13 Selection of Processes for Water Treatment Sludges
给水处理污泥工艺的选择
1

Historically, settled coagulation wastes and backwash waters had been disposed of without treatment. 过去，沉淀的混凝废弃物与反冲水是不经处理而直接排放的。 The practice was justified on the basis that the returned material had originally been present in the river or lake. 基于这些返回的物质是河流与湖泊中原本就有的，这种做法曾经被认为正确的。

Emphasis is placed on preventing magnesium hydroxide precipitation, since it inhibits dewaterability and processing for recovery of lime. 应当强调的是，由于氢氧化镁抑制脱水性能和回收石灰的处理，要防止形成氢氧化镁沉淀。

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Table 2-2 Treatment and Disposing of Water Treatment Sludges Storage prior to processing Sedimentation basins Separate holding tanks F1occulator-c1arifier basins Thickening prior to dewatering Gravity settling Chemical conditioning prior to dewatering Polymer application Lime addition to alum sludges

英文材料 --污水处理和回用新技术参考课件

wetland
technology
Predation with class
Constructed Wetland for Sewage Treatment
3
Flow Diagram of System of Constructed Wetland for Sewage Treatment
Pre-treatment facility
Water outlet BOD5
October 1997
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Selection of Plants for Constructed Wetland
Main Plants to choose
Ornamental plant
Reed Canna
Typha Iris
10
Technical features of Constructed Wetland
phosphorus
11
Project Example of Constructed Wetland （1)
Domestic Sewage in Rural Area
Sewage
Septic pool
Grill
Pre-treatment
IrrigationFra bibliotekMedium water pool
Emission
New Technology and Application Examples on Sewage Treatment and
Reclamation
New Technology on Sewage Treatment and Reclamation
➢ Underground SBR sewage treatment technology

给水排水专业英语课件(李田)20

In some circumstances, these pollutants may be of major concern.
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In these cases, processes capable of removing pollutants not adequately removed by secondary treatment are used in what is called tertiary wastewater treatment (these processes have often been called advanced wastewater treatment, or AWT for short). The following processes. sections describe available AWT
Unit 20
Advanced Wastewater Treatment
污水深度处理
1

Although secondary treatment processes, when coupled with disinfection, may remove over 85 percent of the BOD and suspended solids and nearly all pathogens, only minor removal of some pollutants, such as nitrogen, phosphorus, soluble COD, and heavy metals, is achieved .

The biological process is called nitrification/ denitrification. The chemical process is called ammonia stripping.

城市污水处理技术英文 PPT

1.0
1.0
1.0
1.5
1.5
13 硒
0.01
0.01
0.01
0.02
0.02
表114 地砷表水环境质量标0.0准5 基本0.项05 目标0准.05限值 0(.单1 位: m0.1g/L)
15 汞
0.00005 0.00005 0.0001 0.001 0.001
16 镉
0.001 0.005 0.005 0.005
0.2
0.3
0.3
23 硫化物
0.05
0.1
0.05
0.5
1.0
24 粪大肠菌群(个/L)
200
2000 10000 20000 40000
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)
序号 1 2 3 4 5
项目硫酸盐(以 SO4²-计)
氯化物(以 Cl-计) 硝酸盐(以 N 计)
表1 地表水环境质量标准基本项目标准限值 (单位: mg/L)
序号项目
类别
1 水温(oC)
2 pH 值(无量纲)
3 溶解氧
4 高锰酸盐指数 5 化学需氧量(COD)
五日生化需氧量 6
(BOD5) 7 氨氮(NH3-N)
I类
II 类
III 类
IV 类
V类
人为造成的环境水温变化应限制在：周平均最大温升≤1 周平均最大温降≤2
Aquatic Life Criteria Nutrient Criteria
1、3 Water Environmental Standard
American standard: Clean Water Act (CWA) The NRWQC 2002 includes Criteria for priority toxic pollutants: 120 items

水污染-英文演讲ppt

Thank you !
WATER POLLUTION
Yangzhou, China Miles
The four basic natural resources are water, air, land and energy. We need water for multiple uses and a certain quality is required. Its use leads to the generation of wastewater that can cause an impact on the environment.
As far as future prospect is concerned, I am sure that good results will be achieved in this respect. Rivers which used to be contaminated by industrial wastes will be cleaned and fish which could not live there a few years ago will be again. To conclude, it seems obvious that tomorrow will be better and brighter only if everyone does his part and tries hard to seek solutions for its control.
In addition, factories in towns and cities must be prohibited from draining waste liquids into rivers before they are totally treated and purified. I feel if they violate relevant rules or laws, they should be fined heavily. Certainly, there are some other cures which are worth adopting.

给排水专业英语报告PPT

然而，今天的情况，少量的新鲜水，这是不断的被降雨，对我们来说还是足够。但我们对水的需求增长迅速——几乎一天一天。如果我们采取措施来处理这个问题，现在我们可以避免严重的全球水资源短缺后。限量供水会对农业和工业产生坏的影响。让我告诉你一个工业对于水需求的简单例子。你知道，生产一吨钢，大约需要91，000公升的水么？
Professional English of water and wastewater engineering
Saving Water
The world is not only hungry, but also thirsty for water. This may seem strange to you, since nearly 75 % of the earth's surface is covered with water. But about 97% of this huge amount is sea water, or salt water. Man can only drink and use the other 3% -- the fresh water that comes from rivers, lakes,underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been polluted. 世界不仅饥饿，而且因为缺水而干渴。你可能会觉得奇怪，因为近75%的地球表面被水覆盖着。但是大约97%的数量庞大的海水，或盐水。人只能喝，用其他3%——来自河流，湖泊，地下淡水，和其他来源。我们甚至不能使用，因为它的一部分是在冰山和冰川的形成。更糟糕的是，其中一些已经被污染了。

水处理演讲稿英语范文

Good morning! It is my great honor to stand before you today to talk about an issue that is of great concern to us all – water treatment. Water is essential to life, and the quality of our water resources directly affects the health of our planet and its inhabitants. Therefore, it is our responsibility to ensure that we protect and preserve ourwater resources, and that we implement effective water treatment methods.Water treatment is a crucial process that removes impurities and contaminants from water, making it safe for drinking, industrial use,and environmental protection. With the rapid development of industrialization and urbanization, the demand for clean water has increased significantly. However, water pollution has also become a severe problem, posing a threat to our health and the environment.The primary sources of water pollution include industrial waste, agricultural runoff, and domestic sewage. Industrial waste contains a wide range of harmful chemicals and heavy metals that can cause serious health problems. Agricultural runoff carries fertilizers, pesticides,and other pollutants into water bodies, leading to eutrophication andfish kills. Domestic sewage contains organic matter, bacteria, and viruses that can contaminate water sources and cause waterborne diseases.To address these challenges, various water treatment methods have been developed. The most common methods include physical, chemical, and biological treatments.Physical treatment involves the removal of suspended solids andparticles from water through processes such as sedimentation, filtration, and flocculation. This method is relatively simple and cost-effective, making it suitable for small-scale water treatment plants.Chemical treatment involves the use of chemicals to remove contaminants from water. Coagulants and flocculants are commonly used to remove suspended solids, while disinfectants such as chlorine and ozone are used to kill bacteria and viruses. Chemical treatment is effective for removing a wide range of contaminants, but it can be expensive and may produce harmful by-products.Biological treatment utilizes microorganisms to break down organicmatter in water. This method is highly efficient and can remove up to 95% of organic pollutants. However, it requires a longer treatment time and can be affected by temperature and pH levels.In addition to these methods, there are other innovative water treatment technologies that can help us address the challenges of water pollution. These include nanofiltration, reverse osmosis, and advanced oxidation processes. These technologies are more expensive and complex, but they offer a higher level of purification and can be used in conjunction with other methods to achieve the best results.To promote sustainable water treatment, we need to take a holistic approach. This includes:1. Implementing strict regulations on industrial and agricultural waste disposal to minimize pollution.2. Encouraging the reuse of treated wastewater for non-potable purposes, such as irrigation and industrial processes.3. Investing in research and development to improve water treatment technologies and make them more affordable and accessible.4. Raising public awareness about the importance of water conservation and pollution prevention.In conclusion, water treatment is a critical process that plays a vital role in protecting our water resources and ensuring the health and well-being of our planet. By adopting effective water treatment methods, implementing sustainable practices, and promoting public awareness, we can create a brighter future for ourselves and future generations.Thank you for your attention.。

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RIGHT CHOICE
Biological contact oxidation tank
(生物接触氧化池)
microorganism
少量污泥
The advantage
• ①Can effectively remove organic contaminants , and maintain good treatment effect • ②Simple and convenient operation , easy to manage , needless sludge return , sludge bulking phenomenon does not produce . • ③Generate less sludge , sludge particles larger , easy to precipitate
The belt thickener-press filter can squeeze sludge into filter cake with two belts after flocculation.
Its operation is simple, general staff can handle the entire process after a short period of training.
Valveless gravity filter (重力式无阀滤池）
Pressure filter (压力滤池)
Ordinary rapid filter (普通快滤池)
Low cost simple and mature process easy maintenance Higher surface load stable operation
• ①More economical for large-scale wastewater treatment plant • ②The Mechanical sludge facilities have been produced stereotyped in series • ③Large volume, commonly used in large water sedimentation process
Sludge Thickening and Dewatering
We choose belt thickenerpress filter in sludge thickening and dewatering. The solids concentration of the sludge from belt thickener-press filter can be as high as 16% to 40%.
1. Elimination of microorganisms efficiently 2. Does not lose efficacy over time 3. No harmful byproducts 4. Disinfection power is independent of pH 5.Be economical
sewage Grille Remove larger or floating debris suspended solids Grit chamber Primary settling Remove ss 50%~60%, BOD 15%~20% , COD10%~15% Biological contact oxidation Secondary settling filter Remove sludge from the water, COD≈5% Free of disease-causing microorganism disinfection Clean water tank Water reuse Remove BOD≈90%, COD≈80% Remove suspended impurities and reduce water turbidity . organic compounds , bacteria and even viruses Remove a large proportion of inorganic particles
The disadvantage
• Filler may cause blocked phenomenon , water distribution and aeration are not uniform ,which makes appear dead in the some area . • PS：Through the reasonable design and operation , these shortcoming can be avoided .
The Flow Chart of Waste Water Treatment Processes
primary settling Grit chamber Grille sewage
Sludge Thickening and Dewatering Biological contact oxidation Secondary settling Filter Disinfection
Clean water tank
Grille (格栅）
--------To retain larger or floating debris suspended solids，such as fiber, broken skin, hair, wood, fruit, vegetables, and other plastic products。In order to reduce the processing load of the follow-up treatment structures, and make it work 。
The secondary sedimentation tank
——The Radial-flow sedimentation (辐流式沉淀池)
The secondary sedimentation tank
——The Radial-flow sedimentation (辐流式沉淀池)
• The advantage :
(COD—200mg/L，refractory OM—20%) 姓 Team members: 名
Considering water reuse , we designed the sewage treatment processes include pretreatment, biochemical treatment and tertiary treatment . Biological treatment of domestic sewage in the present is the most economical and appropriate sewage treatment process . After sewage treatment processes , COD must be reduced to less than 50mg/L , which comply with water quality standards .
Medium gille（中格栅） Pump（泵房） Fine grille（细格栅）
Grit chamber（沉砂池）
--------Remove a large proportion of inorganic particles (such as sand, cinder, etc.)
Advection-type grit chamber （平流沉砂池） Aeration-type grit chamber （曝气沉砂池）
Ordinary rapid filter (普通快滤池)
Disinfection Chlorine dioxide(Clo2)
• Chlorine dioxide，Clo2，is a greenishyellow gas at ordinary room temperature and pressure. • Clo2 is effective in destroying or preventing the spread of communicable disease Mechanism： Clo2 can through in cell and prevent the metabolism by oxidizing DNA or RNA, microoganism died.
Bell type grit chamber （钟式沉砂池）
Centripetal Radial-flow Sedimentation Tank
Strong Points
• • • • Using mechine to shovel the sludge Stable operation easy to manage There are Ready-made equitment of Scraping machine to choose
• The disadvantage :
• Sludge equipment is huge, complex structures and high cost. • High quality construction.
Filter（滤池）
Through the processes of sewage treatment above, waste water has reached the effluent standard .
Contain COD—200mg/L， refractory OM—20%
reuse water quality meeting the GB85 standard .
COD＜50mg/L , BOD＜10mg/L , refractory almost be removed