水污染处理文献综述英文
污水处理外文文献
污水处理外文文献Wastewater treatment is a critical process that involves the removal of pollutants and contaminants from water, making it safe for discharge back into the environment or for reuse. This process is important because it ensures that water resources are not polluted or depleted, which can have severe consequences on the environment and public health. In this document, we will explore some important foreign language literature on wastewater treatment, its different types, and the various techniques used in the process.Types of Wastewater TreatmentGenerally, wastewater treatment can be classified into two categories: primary treatment and secondary treatment. Primary treatment involves the physical removal of large, suspended solids from wastewater. This process primarily relies on sedimentation and filtration techniques. Secondary treatment, on the other hand, is a biological process that involves the use of microorganisms to break down organic matter in wastewater. It usually follows primary treatment and is more effective at removing pollutants than primary treatment.Techniques Used in Wastewater TreatmentThere are several techniques used in the treatment of wastewater. Some of these techniques include:1. Biological Treatment: This is the most commonly used method in secondary treatment, and it involves the use of biological agents such as bacteria and microorganisms to degrade organic matter in wastewater. The process involves aerobic or anaerobic degradation of pollutants in wastewater. During this process, microorganisms convert organic matter into carbon dioxide and water.2. Chemical Treatment: This method involves adding chemicals, such as coagulants and flocculants, to wastewater to remove suspended solids and other contaminants. Chemical treatment is commonly used in primary treatment processes.3. Physical Treatment: This method involves the removal of solids and other particles from wastewater using physical processes such as sedimentation, filtration, and screening. Physical treatment is usually used at the beginning of the treatment process.4. Membrane Technology: This is a newer process in wastewater treatment that uses filters with tiny pores to separate contaminants from wastewater. It is mainly used in tertiary treatment, which is the final stage of treatment before discharge.Foreign Language Literature on Wastewater TreatmentThere are several foreign language literature sources on wastewater treatment. Some of the most important ones include:1. The Water Environment Federation: This is a non-profit organization that provides publications and research on wastewater treatment. They offer peer-reviewed journals and books that provide valuable information on the latest research and technology in wastewater treatment.2. Water Research Journal: This is an international journal that publishes research on water treatment and related fields. It offers peer-reviewed articles on topics such as wastewater engineering, water quality, and water resources.3. Environmental Science and Technology Journal: This is a publication that covers various aspects of environmental science and technology, including water treatment. It providespeer-reviewed articles on research in environmental science and technology.ConclusionWastewater treatment is an essential process that ensures that water resources are not polluted or depleted. It involves different treatment methods, such as physical, chemical, and biological treatment. Among the different sources of literature on wastewater treatment, the Water Environment Federation, the Water Research Journal, and the Environmental Science and Technology Journal are valuable sources of information. Newadvances in technology mean that wastewater treatment is becoming more efficient and effective, ensuring the safe discharge of treated wastewater back into the environment or for reuse.。
水污染的解决英语作文
水污染的解决英语作文Title: Addressing Water Pollution。
Water pollution is a pressing issue that demands immediate attention and concerted efforts to mitigate its detrimental effects on both the environment and human health. In this essay, I will delve into various aspects of water pollution and propose effective solutions to tackle this global challenge.To begin with, it is imperative to comprehend the sources and causes of water pollution. Industrial discharges, agricultural runoff, improper disposal of waste, and urbanization are among the primary contributors towater contamination. Chemical pollutants, such as heavy metals, pesticides, and pharmaceuticals, as well as organic matter and pathogens, further exacerbate the problem. These pollutants not only degrade water quality but also endanger aquatic ecosystems and compromise access to safe drinking water.One of the most promising approaches to combat water pollution is implementing stringent regulations and policies. Governments and regulatory bodies must enforce laws that limit the discharge of pollutants into water bodies and establish strict standards for industrial and agricultural practices. Additionally, promoting eco-friendly technologies and sustainable practices can help industries reduce their environmental footprint and minimize pollution.Furthermore, public awareness and education play a crucial role in addressing water pollution. Educating communities about the importance of clean water, the consequences of pollution, and the actions they can take to protect water resources are essential steps towards fostering a culture of environmental stewardship. Schools, media campaigns, and community outreach programs can serve as effective platforms for disseminating information and raising awareness about water pollution.Innovative technologies also offer promising solutionsto combat water pollution. Advanced wastewater treatment systems, such as membrane filtration, reverse osmosis, and ultraviolet disinfection, can effectively remove contaminants from wastewater before it is discharged into water bodies. Furthermore, investing in research and development to develop new treatment technologies and sustainable water management practices is crucial for addressing emerging pollutants and ensuring long-term water quality.Another critical aspect of addressing water pollutionis international cooperation and collaboration. Given that water pollution transcends national borders, concerted efforts at the global level are essential to address this complex issue. International agreements, partnerships, and initiatives can facilitate knowledge sharing, capacity building, and coordinated action to mitigate waterpollution on a global scale.In addition to regulatory measures and technological innovations, promoting sustainable consumption andlifestyle choices is vital for reducing water pollution.Individuals can contribute to the conservation of water resources by minimizing their use of single-use plastics, adopting water-saving practices at home, and supporting businesses that prioritize environmental sustainability.In conclusion, water pollution is a multifaceted problem that requires a comprehensive and concerted response from governments, industries, communities, and individuals. By implementing strict regulations, raising public awareness, investing in innovative technologies, fostering international cooperation, and promoting sustainable practices, we can effectively mitigate water pollution and ensure access to clean and safe water for present and future generations. It is imperative that we act decisively and collectively to safeguard our precious water resources and preserve the health of our planet.。
处理水污染英文作文
处理水污染英文作文Water pollution is a serious problem that affects the health of people and the environment. It is caused by the discharge of industrial waste, agricultural runoff, and untreated sewage into rivers, lakes, and oceans.The pollution of water can have devastating effects on aquatic life. Fish, plants, and other organisms can be harmed or killed by toxins and chemicals in the water. This can disrupt the delicate balance of the ecosystem and lead to a decline in biodiversity.In addition to harming the environment, water pollution can also have serious consequences for human health. Contaminated water can spread diseases such as cholera, dysentery, and typhoid, leading to illness and even deathin affected communities.Efforts to combat water pollution include implementing stricter regulations on industrial and agricultural waste,improving sewage treatment facilities, and promoting sustainable practices that reduce the amount of pollutants entering waterways.It is important for individuals to be aware of their own impact on water quality and take steps to reduce pollution in their daily lives. This can include properly disposing of household chemicals, minimizing the use of fertilizers and pesticides, and conserving water to reduce the strain on treatment facilities.。
对于清河水污染的解决英语作文
对于清河水污染的解决英语作文【中英文实用版】Title: Addressing the Pollution of Qinghe RiverThe Qinghe River, once a source of pride for our city, has become a victim of its own success.Over the past few decades, the river has faced severe pollution, posing a significant threat to both the environment and public health.This essay will discuss the causes and consequences of Qinghe River pollution and propose solutions to address this pressing issue.The primary cause of Qinghe River pollution is industrial waste.Factories and businesses have been dumping untreated waste into the river, leading to an increase in chemical substances and pollutants.Urbanization and population growth have also contributed to the problem, as more domestic waste is being discharged into the river.In addition, agricultural runoff containing fertilizers and pesticides has further exacerbated the situation.The consequences of Qinghe River pollution are far-reaching.The water quality has deteriorated, making it unsafe for human use and killing off fish and other aquatic life.The river"s ecosystem has been disrupted, leading to a loss of biodiversity.Furthermore, the pollution has had negative impacts on the local economy, as tourism and fishing industries have suffered.To address the pollution of Qinghe River, a multi-pronged approach is necessary.Firstly, strict regulations should be implemented to control industrial waste disposal.Offenders should face heavy fines and other penalties to deter such practices.Secondly, wastewater treatment plants should be constructed to filter out pollutants before the water is discharged into the river.Thirdly, public awareness campaigns should be conducted to educate residents about the importance of proper waste disposal and the impact of pollution on the environment.Finally, sustainable agricultural practices should be promoted to reduce agricultural runoff.In conclusion, the pollution of Qinghe River is a serious issue that requires immediate attention and action.By implementing strict regulations, constructing treatment plants, raising public awareness, and promoting sustainable practices, we can work towards restoring the river to its former glory.It is our responsibility to protect our environment and ensure a healthy future for generations to come.。
治理水污染英语作文
治理水污染英语作文Water pollution is a serious problem that we need to address immediately. It is affecting not only the environment but also our health. We need to take action now to prevent further damage.One way to tackle water pollution is to reduce the useof harmful chemicals in agriculture and industry. These chemicals can seep into the water supply and contaminate it, causing harm to aquatic life and potentially to humans as well.Another important step is to improve wastewater treatment facilities. Many pollutants enter the water through sewage and industrial waste. By upgrading our treatment plants, we can remove these contaminants before they reach our rivers and oceans.Education is also key in fighting water pollution. By raising awareness about the issue and teaching people aboutthe importance of clean water, we can encourage individuals to take action in their own lives to reduce pollution.Government regulations play a crucial role in controlling water pollution. Strong laws and enforcement mechanisms are necessary to hold polluters accountable and ensure that they are taking steps to reduce their environmental impact.In addition to these measures, we also need to invest in research and innovation to find new ways to clean up polluted water and prevent further contamination. By supporting scientific advancements in this area, we can develop more effective solutions to protect our water resources for future generations.。
水污染处理文献综述英文
Application of multi-soil-layer system (MSL) in ruralwastewater treatmentAbstract: with the continuous improvement of living in rural farmers, the water consumption of residents is increasing, rural sewage emissions will continue to increase, if not treat effectively, the water environment in rural areas will be serious deteriorated, and influence the life quality of rural residents. In this case this paper presents a decentralized sewage treatment system, multi-soil-layer system technology (MSL) application in the rural sewage treatment, this paper summarizes the new technology, you can better understand and practice, especially in the developing countries where is in need of this technology. In the foreseeable future, it can protect public health and the sustainable development of the environment, and it also provides a new way for rural sewage treatment.Key words:rural sewage; multi-soil-layering system; distributed1.IntroductionIn recent years, with the continuous development of economy, people's living standards continue to improve, rural economic development is also very rapid, but the rural economic development and environmental development is not synchronized, serious rural water pollution.While high technical sewage treatment plants, such as centralized sewage treatment plants are involved in large investment costs, high operating costs, Because of economic constraints, such systems are less suitable for livestock farms and small communities in rural areas. While the multi-media-soil layer system(MSL) sewage treatment system, this decentralized sewage treatment system, it has less investment, low operating costs, high handling load. Besides, the utility model overcomes the defects of the prior soilpercolation which is easy to be blocked from the space structure. The sewage treatment system is one kind of the purification technology of sewerage treatment soil developed in Japan in twentieth Century, the soil system will be modularized, and the module is set up around the water in the soil layer to avoid clogging, and adding natural organic materials to soil modules can improve the purification ability of the system.The MSL system consists of a Permeable layer (PL) and a soil mixing layer block (SMB),The Permeable layer is usually composed of larger particles fillers such as gravel, pumice, perlite and zeolite.Higher porosity can effectively prevent clogging of the soil water layer.At the same time, the formation of aerobic environment is conducive to organic degradation.The mixed layer soil is mainly packing soil mixed with other 20%-30% other materials such as activated carbon, wood, iron and other material or soil with local resources.The organic material added in the soil mixed layer can improve the biological decomposition and adsorption capacity of the system, and can also improve the supply of hydrogen in the process of nitrogen removal and promote the removal of nitrogen.There are many researches on MSL system treating urbansewage, livestock wastewater and river water at home and abroad. Researchers in China, Ye Hai et al[1] studied the effect of surface load on polluted river water treated by multi-soil-layer system.Song Ying[2]had studied the treatment effect of multi medium soil infiltration system for turtle breeding wastewater.Zou Jun[3]also pointed out that multi-soil-layer material selection will have a certain impact on the domestic sewage treatment efficiency.In foreign countries, especially in Japan, Thailand and Indonesia, MSL systems have been used to handle various types of wastewater, but the domestic of this technology in sewage treatment in rural areas there is no comprehensive study,This article through to the MSL system technology processing rural domestic sewage research, in order to provide some technical support for the MSL system in the practical application of rural sewage treatment.2.1characteristics of rural sewageFor a long time,China's pollution control on rural attention and investment far less than the city,96% of the villages without drainage pipe network and sewage treatmentsystem,The random discharge of domestic sewage has become one of the main reasons for the deterioration of water quality in the basin, and is also an important factor causing the rural water environment pollution and lake eutrophication.At the same time, it seriously affects the safety of production and living in the rural areas, and seriously affects the economic development.The main features of rural sewage in China are:(1)The amount is huge and increases year by year. Statistics show that in 2002.There are 3.205 million tons of national rural domestic sewage daily emissions.The total nitrogen emission is about 283.1t, total phosphorus daily emission is about 56.6t, basically without any treatment directly discharged.(2)Water quality and water quantity fluctuation are huge. Rural sewage water is not stable, different periods have different water quality,generally do not contain heavy metals and toxic and harmful substances, but contains more synthetic detergent and bacteria, viruses.(3)More sources.In addition to human feces, kitchen generated sewage, there are household cleaning, domestic waste landfill leachate generated sewage, which will then enter theriver part of the sewage, will cause greater pollution.(4)Low treatment rate.Part of the system can not run low temperature, rural sewage daily variation coefficient and seasonal variation coefficient, the system a few time high load operation, if there is little sewage, it will stop running [4].(5)Wide and scattered.Scattered geographical distribution of villages caused sewage dispersion and it is difficult to collect.2.2 the main source of rural sewageRural sewage refers to the formation of sewage of the rural areas in the life and production process, including rural production wastewater and rural domestic sewage two aspects. Rural domestic sewage refers to the residents living in the process of toilet discharge of sewage, bath, laundry and kitchen sewage, etc.Rural production sewage refers to livestock and poultry breeding, aquaculture, agricultural products processing and other high concentration of organic wastewater.Because China's rural living is scattered, rural domestic sewage showed a small amount and wide ck of appropriate sewage collection, treatment facilities, domestic sewage without treatment will be free to discharge,the health of rural residents to bring greater harm.At the same time, rural sewage production also poses a greater threat to the rural ecological environment.2.3main technologies of decentralized domestic sewage treatmentBeginning in 1970s, Japan, the United States, Europe and other developed countries on the use of decentralized sewage treatment of rural sewage treatment, has accumulated a lot of experience, achieved good results.The United States since the mid-20th century began the construction of rural sewage treatment facilities, in 1972 promulgated the first complete clean water, then according to the distributed processing technology in 2002 promulgated the decentralized sewage treatment system application manual [5].1987, In Denmark promulgated a decentralized sewage treatment guidelines[6]. Germany from 2003 to implement the decentralized needle infrastructure system project research, use membrane bioreactor purification to treat remote rural sewage[7]. Australia proposed a sewage treatment land use system [8].While research and application of rural sewage decentralized treatment in China began in late 1980s,Compared with developedcountries and regions, there are still many gaps in laws and regulations system, technical standard system and management and service system.In recent years, domestic scholars have done a lot of research on rural domestic sewage,and puts forward some mature processing technology, including aerobic biological treatment, anaerobic biological treatment technology, soil infiltration technique and physical and chemical processing technology etc.There are many scholars in the multi-soil-layer system improvement and application development of the Japanese, it has also done a lot of research, some scholars found through experiments: to earthworm soil infiltration layer can also solve the problem of blockage of MSL system, but also can guarantee the winter operation effect in winter [9-10].2.4 Multi-soil-layer system (MSL) technology2.4.1Structural characteristics of multi-media-soil layer systemMulti-soil-layer treatment (MSL) system is a kind of land sewage treatment system.Mainly composed of Permeable layer (PL) and a soil mixing layer block (SMB),From top to bottom are waterproof layer, gravel layer, soil layer and mixed layer (twoalternately arranged), in addition, the MSL technology has a certain terrain fall from the inlet to the outlet, mainly by the drop let water can automatically flow in the system, at the same time to purify [11].2.4.2Purification mechanism of multi-soil-layer systemWastewater contains high concentrations of BOD, COD, ammonia nitrogen, phosphate ions and organic matter.When the wastewater into the MSL system, the organic matter in wastewater can be adsorbed on the surface of zeolite and soil through physical and chemical effects, followed by decomposition of soil layer in microorganism, and phosphorus removal is mainly through the soil layer of iron is oxidized to ferric hydroxide after the formation of insoluble iron, then adsorption in wastewater the formation of phosphate coprecipitation.Nitrogen removal is mainly through nitrification and denitrification by ammonia ion, and finally reduced to nitrogen discharge system.2.4.3Advantages of multi-soil-layer systemMulti-media-soil layer system is used to treat wastewater from traditional soil infiltration system.It has the disadvantages of low treatment load, large ground, easy toblock nitrogen and phosphorus removal and other shortcomings [12].The MSL system with "soil modular" as the core concept, its unique brick type internal structure can form a plurality of aerobic and anaerobic environment in order to promote the removal of pollutants,Among them, the permeable layer greatly improves the water permeability of the system to prevent clogging, adding natural materials in the soil increases the purification capacity of the system.3.ConclusionsWith the economic reform and development, China's environmental awareness is also improving, water pollution in rural areas have also obtained more and more attention,The MSL system applicable to the small population, scattered in rural areas, the decentralized sewage treatment system can be widely installed and used in the rural society, especially in rural areas of developing countries such as Chinese, Chinese is in need of such technology, sustainable development can protect the public health and the environment.4.Reference[1] Ye Hai Ye et al. Effect of surface load on polluted river water treatedby multi-soil- layer system[J]. China water supply and drainage, 2012,28 (19): 74-77[2]Ying Song et al.Treatment of turtle aquaculture effluent by anmulti-soil-layer system[J].Journal of Zhejiang University ScienceB.2015,16(2):145-154[3]Zou Jun, Chen Xin et al. Effect of material selection ofmulti-soil-layer system on domestic wastewater treatment efficiency[J]. Journal of ecology and rural environment, 2010,26 (1): 14-18[4]Zhang Keqiang et al. Rural sewage treatment technology[M]Beijing:China Agricultural Science and Technology Press, 2006.10[5] Chen Jinming et al.Policy and experience of managing decentralizedwastewater treatment systems in the United States [J]. China water supply and drainage, 2004,20 (6): 104-106[6] Hans B.Danish guidelines for small-scale constructed wetland systemsfor onsite treatment of domestic sewage[C].Proceedings of the 9th International Conference on Wetland Systems for Water Pollution Control, Avignon, France,2004:1-8[7] Li Wushuang, Wang Hongyang. Status and treatment technology of ruraldecentralized domestic wastewater [J]. Tianjin Agricultural Sciences, 2008,14 (6): 75-77[8] Zhang Jiawei, Zhou Zhiqin. Application of decentralized treatmenttechnology for rural domestic sewage [J]. environmental science and management, 2011,36 (1):95-99[9] Wang Xixi, Guo Feihong, et al. A new improved capillary infiltrationditch for domestic wastewater treatment. [J].environmental chemistry,2011,30(3): 721-722[10]Zhang Xiaowei, Li Jianchao, et al. Experimental study on earthwormenhanced land treatment of rural wastewater [J]. Journal of agro environmental science,2009,28 (6): 1225-1229[11]Hu Hongqi, Yang Yong et al. Analysis of practical application of twoefficient rural sewage treatment technologies [J]. Heilongjiang environmental bulletin, 2016, 40 (1): 20-24[12] Xin Chen et al.An introduction of a multi-soil-layering system:anovel green technology for wastewater treatment in rural areas[J].Water and Environment Journal.2009:255-262。
水污染处理文献综述英文上课讲义
水污染处理文献综述英文Application of multi-soil-layer system (MSL) in ruralwastewater treatmentAbstract: with the continuous improvement of living in rural farmers, the water consumption of residents is increasing, rural sewage emissions will continue to increase, if not treat effectively, the water environment in rural areas will be serious deteriorated, and influence the life quality of rural residents. In this case this paper presents a decentralized sewage treatment system, multi-soil-layer system technology (MSL) application in the rural sewage treatment, this paper summarizes the new technology, you can better understand and practice, especially in the developing countries where is in need of this technology. In the foreseeable future, it can protect public health and the sustainable development of the environment, and it also provides a new way for rural sewage treatment.Key words: rural sewage; multi-soil-layering system; distributed1.IntroductionIn recent years, with the continuous development of economy, people's living standards continue to improve, rural economic development is also very rapid, but the rural economic development and environmental development is not synchronized, serious rural water pollution.While high technical sewage treatment plants, such as centralized sewage treatment plants are involved in large investment costs, high operating costs,Because of economic constraints, such systems are less suitable for livestock farms and small communities in rural areas. While the multi-media-soil layer system(MSL) sewage treatment system, this decentralized sewage treatment system, it has less investment, low operating costs, high handling load. Besides, the utility model overcomes the defects of the prior soil percolation which is easy to be blocked from the space structure.The sewage treatment system is one kind of the purification technology of sewerage treatment soil developed in Japan in twentieth Century, the soil system will be modularized, and the module is set up around the water in the soil layer to avoid clogging, and adding natural organic materials to soil modules can improve the purification ability of the system.The MSL system consists of a Permeable layer (PL) and a soil mixing layer block (SMB),The Permeable layer is usually composed oflarger particles fillers such as gravel, pumice, perlite and zeolite.Higher porosity can effectively prevent clogging of the soil water layer.At the same time, the formation of aerobic environment is conducive to organic degradation.The mixed layer soil is mainly packing soil mixed with other 20%-30% other materials such as activated carbon, wood, iron and other material or soil with local resources.The organic material added in the soil mixed layer can improve the biological decomposition and adsorption capacity of the system, and can also improve the supply of hydrogen in the process of nitrogen removal and promote the removal of nitrogen.There are many researches on MSL system treating urban sewage, livestock wastewater and river water at home and abroad.Researchers in China, Ye Hai et al[1] studied the effect of surface load on polluted river water treated by multi-soil-layer system.Song Ying[2] had studied the treatment effect of multi medium soil infiltration system for turtle breeding wastewater.Zou Jun[3] also pointed out that multi-soil-layer material selection will have a certain impact on the domestic sewage treatment efficiency.In foreign countries, especially in Japan, Thailand and Indonesia, MSL systems have been used to handle various types of wastewater, but the domestic of this technology in sewage treatment in rural areas there is no comprehensive study,This article through to the MSL system technology processing rural domestic sewage research, inorder to provide some technical support for the MSL system in the practical application of rural sewage treatment.2.1characteristics of rural sewageFor a long time,China's pollution control on rural attention and investment far less than the city,96% of the villages without drainage pipe network and sewage treatment system,The random discharge of domestic sewage has become one of the main reasons for the deterioration of water quality in the basin, and is also an important factor causing the rural water environment pollution and lake eutrophication.At the same time, it seriously affects the safety of production and living in the rural areas, and seriously affects the economic development.The main features of rural sewage in China are:(1)The amount is huge and increases year by year.Statistics show that in 2002.There are 3.205 million tons of national rural domestic sewage daily emissions.The total nitrogen emission is about 283.1t, total phosphorus daily emission is about 56.6t, basically without any treatment directly discharged.(2)Water quality and water quantity fluctuation are huge.Rural sewage water is not stable, different periods have different water quality, generally do not contain heavy metals and toxic and harmful substances,but contains more synthetic detergent and bacteria, viruses.(3)More sources.In addition to human feces, kitchen generated sewage, there are household cleaning, domestic waste landfill leachate generated sewage, which will then enter the river part of the sewage, will cause greater pollution.(4)Low treatment rate.Part of the system can not run low temperature, rural sewage daily variation coefficient and seasonal variation coefficient, the system a few time high load operation, if there is little sewage, it will stop running [4].(5)Wide and scattered.Scattered geographical distribution of villages caused sewage dispersion and it is difficult to collect.2.2 the main source of rural sewageRural sewage refers to the formation of sewage of the rural areas in the life and production process, including rural production wastewater and rural domestic sewage two aspects.Rural domestic sewage refers to the residents living in the process of toilet discharge of sewage, bath, laundry and kitchen sewage, etc.Rural production sewage refers to livestock and poultry breeding, aquaculture, agricultural products processing and other high concentration of organic wastewater.Because China's rural living is scattered, rural domestic sewage showed a small amount and wide ck of appropriate sewage collection,treatment facilities, domestic sewage without treatment will be free to discharge, the health of rural residents to bring greater harm.At the same time, rural sewage production also poses a greater threat to the rural ecological environment.2.3main technologies of decentralized domestic sewage treatmentBeginning in 1970s, Japan, the United States, Europe and other developed countries on the use of decentralized sewage treatment of rural sewage treatment, has accumulated a lot of experience, achieved good results.The United States since the mid-20th century began the construction of rural sewage treatment facilities, in 1972 promulgated the first complete clean water, then according to the distributed processing technology in 2002 promulgated the decentralized sewage treatment system application manual [5].1987, In Denmark promulgated a decentralized sewage treatment guidelines [6].Germany from 2003 to implement the decentralized needle infrastructure system project research, use membrane bioreactor purification to treat remote rural sewage [7]. Australia proposed a sewage treatment land use system [8].While research and application of rural sewage decentralized treatment in China began in late 1980s,Compared with developed countries and regions, there are still many gaps in laws and regulations system, technical standard system and management and service system.In recent years, domestic scholars have done a lot of research on rural domestic sewage,and puts forward somemature processing technology, including aerobic biological treatment, anaerobic biological treatment technology, soil infiltration technique and physical and chemical processing technology etc.There are many scholars in the multi-soil-layer system improvement and application development of the Japanese, it has also done a lot of research, some scholars found through experiments: to earthworm soil infiltration layer can also solve the problem of blockage of MSL system, but also can guarantee the winter operation effect in winter [9-10].2.4 Multi-soil-layer system (MSL) technology2.4.1Structural characteristics of multi-media-soil layer systemMulti-soil-layer treatment (MSL) system is a kind of land sewage treatment system.Mainly composed of Permeable layer (PL) and a soil mixing layer block (SMB),From top to bottom are waterproof layer, gravel layer, soil layer and mixed layer (two alternately arranged), in addition, the MSL technology has a certain terrain fall from the inlet to the outlet, mainly by the drop let water can automatically flow in the system, at the same time to purify [11].2.4.2Purification mechanism of multi-soil-layer systemWastewater contains high concentrations of BOD, COD, ammonia nitrogen, phosphate ions and organic matter.When the wastewater into the MSL system, the organic matter in wastewater can be adsorbed on the surface of zeolite and soil through physical and chemical effects,followed by decomposition of soil layer in microorganism, and phosphorus removal is mainly through the soil layer of iron is oxidized to ferric hydroxide after the formation of insoluble iron, then adsorption in wastewater the formation of phosphate coprecipitation.Nitrogen removal is mainly through nitrification and denitrification by ammonia ion, and finally reduced to nitrogen discharge system.2.4.3Advantages of multi-soil-layer systemMulti-media-soil layer system is used to treat wastewater from traditional soil infiltration system.It has the disadvantages of low treatment load, large ground, easy to block nitrogen and phosphorus removal and other shortcomings [12].The MSL system with "soil modular" as the core concept, its unique brick type internal structure can form a plurality of aerobic and anaerobic environment in order to promote the removal of pollutants,Among them, the permeable layer greatly improves the water permeability of the system to prevent clogging, adding natural materials in the soil increases the purification capacity of the system. 3.ConclusionsWith the economic reform and development, China's environmental awareness is also improving, water pollution in rural areas have also obtained more and more attention,The MSL system applicable to the small population, scattered in rural areas, the decentralized sewage treatment system can be widely installed and used in the rural society,especially in rural areas of developing countries such as Chinese, Chineseis in need of such technology, sustainable development can protect thepublic health and the environment.4.Reference[1] Ye Hai Ye et al. Effect of surface load on polluted river water treated by multi-soil-layer system[J]. China water supply and drainage, 2012,28 (19): 74-77[2]Ying Song et al.Treatment of turtle aquaculture effluent by an multi-soil-layersystem[J].Journal of Zhejiang University Science B.2015,16(2):145-154[3]Zou Jun, Chen Xin et al. Effect of material selection of multi-soil-layer system ondomestic wastewater treatment efficiency[J]. Journal of ecology and rural environment, 2010,26 (1): 14-18[4]Zhang Keqiang et al. Rural sewage treatment technology[M]Beijing: ChinaAgricultural Science and Technology Press, 2006.10[5] Chen Jinming et al.Policy and experience of managing decentralized wastewatertreatment systems in the United States [J]. China water supply and drainage, 2004,20 (6): 104-106[6] Hans B.Danish guidelines for small-scale constructed wetland systems for onsitetreatment of domestic sewage[C].Proceedings of the 9th International Conference on Wetland Systems for Water Pollution Control, Avignon, France,2004:1-8[7] Li Wushuang, Wang Hongyang. Status and treatment technology of ruraldecentralized domestic wastewater [J]. Tianjin Agricultural Sciences, 2008,14(6): 75-77[8] Zhang Jiawei, Zhou Zhiqin. Application of decentralized treatment technology forrural domestic sewage [J]. environmental science and management, 2011,36 (1): 95-99[9] Wang Xixi, Guo Feihong, et al. A new improved capillary infiltration ditch fordomestic wastewater treatment. [J].environmental chemistry,2011,30(3): 721-722[10] Zhang Xiaowei, Li Jianchao, et al. Experimental study on earthworm enhancedland treatment of rural wastewater [J]. Journal of agro environmental science,2009,28 (6): 1225-1229精品文档[11] Hu Hongqi, Yang Yong et al. Analysis of practical application of two efficientrural sewage treatment technologies [J]. Heilongjiang environmental bulletin, 2016, 40 (1): 20-24[12] Xin Chen et al.An introduction of a multi-soil-layering system:a novel greentechnology for wastewater treatment in rural areas[J].Water and Environment Journal.2009:255-262收集于网络，如有侵权请联系管理员删除。
关于水污染和解决方法的英语作文
关于水污染和解决方法的英语作文Title: Tackling Water Pollution: A Call to Action.Water, the essence of life, is facing an unprecedented crisis. The quality of our water resources is deteriorating at an alarming rate due to various anthropogenic activities, leading to widespread water pollution. This epidemic is not confined to any region or country; it is a global issuethat demands immediate attention and concerted efforts from all stakeholders.The primary sources of water pollution can beattributed to industrial waste, agricultural runoff, urban sewage, and oil and chemical spills. Industrial waste often contains toxic chemicals and heavy metals that, when dumped into water bodies, disrupt the ecological balance and posea significant threat to aquatic life and human health. Agricultural runoff, enriched with pesticides andfertilizers, contaminates surface water and groundwater, affecting drinking water quality. Urban sewage, containinguntreated waste from households and industries, adds to the pollution load, especially in densely populated areas. Oil and chemical spills from accidents or illegal discharges further compound the problem, causing widespread environmental degradation.The impact of water pollution is profound and far-reaching. It affects aquatic ecosystems, destroyinghabitats and killing marine life. It contaminates drinking water, leading to various health issues like diarrhea, cholera, and even cancer. Water pollution also has economic implications, affecting agriculture, fishing, and tourism industries that depend on clean water resources.Addressing water pollution requires a multifaceted approach that encompasses legislative measures, technological advancements, and community engagement. Firstly, strict environmental laws and regulations must be enacted and enforced to limit industrial and agricultural pollution. Industries must be made responsible for their waste and be required to adopt sustainable practices and waste treatment methods. Agricultural practices should bemodified to reduce runoff and promote soil conservation.Secondly, technological advancements play a crucialrole in water pollution control. Innovations in water treatment and waste management can significantly reduce pollution levels. For instance, advanced water treatment facilities can purify contaminated water, making it safefor drinking and other uses. Similarly, new waste disposal methods, such as waste-to-energy technologies, can convert waste into useful energy, reducing the amount of waste disposed into water bodies.Moreover, community engagement is essential in thefight against water pollution. Public awareness and education programs can raise awareness about the importance of water conservation and pollution prevention. Communities can be encouraged to adopt water-saving practices, such as rainwater harvesting and water-efficient irrigation systems, to reduce the demand for water and减轻the pollution load.In conclusion, water pollution is a pressing issue that requires urgent action from all stakeholders. By enforcingstrict laws, harnessing technological advancements, and engaging communities, we can combat this menace and secure a sustainable water future for ourselves and future generations. The time to act is now; let us come together to protect and preserve our most precious resource water.。
水污染处理问题英语作文
水污染处理问题英语作文Water Pollution: A Global Crisis.Water is the elixir of life, a precious resource essential for human survival and the flourishing of allliving ecosystems. However, the pervasive problem of water pollution poses a grave threat to the health of our planet and its inhabitants. Sources of water pollution are diverse, ranging from industrial effluents and agricultural runoffto domestic wastewater and plastic waste.Industrial Effluents.Industrial facilities discharge vast amounts of wastewater containing toxic chemicals, heavy metals, and other pollutants into water bodies. These effluents can contaminate drinking water supplies, harm wildlife, and disrupt aquatic ecosystems. The impacts can range from physical deformities and impaired reproduction to outright mortality.Agricultural Runoff.Agricultural practices, such as the use of fertilizers and pesticides, can lead to water pollution when these chemicals are carried away by surface runoff into nearby streams and rivers. Nitrogen and phosphorus fromfertilizers can cause algal blooms, suffocating aquaticlife and creating "dead zones" where oxygen levels are too low to sustain fish and other organisms. Pesticides can bioaccumulate in the food chain, posing risks to humans and wildlife.Domestic Wastewater.Untreated or inadequately treated domestic wastewater from homes, businesses, and institutions contains harmful bacteria, viruses, and other contaminants. Discharge ofthis wastewater into water bodies can cause waterborne diseases, contaminate shellfish beds, and create unpleasant odors and aesthetic problems.Plastic Waste.Plastic waste, a pervasive pollutant, wreaks havoc on aquatic environments. Plastic bags, bottles, and otheritems can entangle marine life, block waterways, and leach harmful chemicals into the water. Microplastics, tiny fragments of plastic, are ingested by aquatic organisms and can accumulate in the food chain, potentially posing risksto human health.Impacts of Water Pollution.Water pollution has far-reaching impacts on human health, aquatic ecosystems, and socioeconomic well-being.Human Health: Consuming contaminated water can cause a range of health problems, including diarrhea, vomiting, and other gastrointestinal ailments. Long-term exposure to certain pollutants, such as heavy metals and some chemicals, can lead to developmental problems, organ damage, and even cancer.Aquatic Ecosystems: Water pollution disrupts the delicate balance of aquatic ecosystems, harming fish, shellfish, and other aquatic life. Pollution can alter food chains, reduce biodiversity, and create conditions that favor invasive species.Socioeconomic Impacts: Water pollution can damage fisheries and tourism, both of which rely on clean water. Contamination of water supplies can also increase the cost of treating water for drinking and other uses.Addressing the Water Pollution Crisis.Addressing the water pollution crisis requires a multifaceted approach involving government regulations, technological innovations, and changes in individual behavior.Government Regulations: Governments can implement stricter water quality standards and enforce penalties for polluters. They can also provide incentives for businesses and individuals to adopt sustainable practices that reducewater pollution.Technological Innovations: Research and development efforts are essential to develop more efficient and cost-effective water treatment technologies. Advanced filtration systems, membrane technologies, and bioremediation techniques offer promising solutions for removingpollutants from water.Changes in Individual Behavior: Individuals can make a significant difference by reducing their water consumption, using eco-friendly products, and properly disposing of waste. Avoiding the use of plastic straws, bags, andbottles can help reduce plastic pollution in waterways.Conclusion.Water pollution is a pressing global crisis that threatens the health of our planet and its inhabitants. It requires urgent action from governments, businesses, and individuals to implement solutions that reduce pollution, protect water resources, and ensure a sustainable futurefor all. By prioritizing water quality, we can safeguard the health of our communities, preserve aquatic ecosystems, and ensure that future generations have access to clean, safe water.。
污水处理-英文文献2
污水处理-英文文献2Wastewater treatment is an essential process in modern society, which aims to remove pollutants and other harmful contaminants from wastewater. It is important for maintaining environmental, public health, and water quality standards. The following article provides an overview of wastewater treatment, including its processes, technologies, and benefits.Wastewater treatment is the process of removing pollutants, viruses, bacteria, and other harmful contaminants from wastewater before it is released back into the environment or reused for other purposes. The importance of wastewater treatment cannot be underestimated, as untreated wastewater can cause serious environmental and health problems. For example, if wastewater containing human waste is discharged into rivers, lakes, or oceans, it can lead to the outbreak of waterborne diseases such as cholera, typhoid, and dysentery.The wastewater treatment process consists of several stages, including primary, secondary, and tertiary treatment. The primary treatment process involves the removal of large particles, such as rocks, sticks, and other debris. This is usually done through the use of screens and grit chambers. After this stage, the wastewater undergoes secondary treatment, which involves the removal of organic matter and suspended solids. This is primarily achievedthrough biological processes, such as aeration and settling. Once this stage is complete, tertiary treatment may be used to remove any remaining contaminants, including nitrogen and phosphates.Wastewater treatment utilizes various technologies to help remove contaminants and pollutants. These technologies include biological treatment such as activated sludge process, anaerobic digesters, sequencing batch reactors; physical treatment such as sedimentation, filtration, and disinfection treatment such as chlorination, ozonation, and UV treatment.There are numerous benefits of wastewater treatment. First, it helps to protect public health, particularly against waterborne diseases caused by untreated wastewater. Second, it helps to maintain environmental standards by preventing pollutants from entering rivers, lakes, and oceans. Third, wastewater treatment enables recycled water to be reused for industry, irrigation, and other purposes, conserving scarce water resources.In conclusion, wastewater treatment is a critical process for protecting public health, preserving the environment, and ensuring a sustainable future. It requires the use of advanced technologies and processes to remove contaminants and pollutants from wastewater before it is released back into the environment or reused for other purposes. By investing in wastewater treatment, we can create healthy and sustainable communities for generations to come.。
水污染怎么解决英文作文
水污染怎么解决英文作文Water pollution is a serious problem that needs to be addressed. One way to solve it is by implementing stricter regulations on industrial waste disposal. Industries should be required to treat their wastewater before releasing it into the environment.Another solution is to educate the public about the importance of keeping our water sources clean. People need to be aware of the impact of their actions on the environment and take responsibility for their own waste.Investing in new technology for water treatment is also crucial in solving water pollution. There are advanced methods available that can effectively remove pollutants from water, and it's important to make these technologies more accessible and affordable.Government intervention is essential in addressing water pollution. Policies and laws need to be implementedand enforced to hold polluters accountable for their actions. This includes penalties for those who violate environmental regulations.Community involvement is key in solving water pollution. Local organizations and individuals can work together to clean up water sources and prevent further contamination. This can be done through clean-up events, educational programs, and advocacy for cleaner water policies.Finally, promoting sustainable practices in agriculture is important in reducing water pollution. This includes using organic farming methods, reducing the use of chemical fertilizers and pesticides, and implementing better soiland water management techniques.In conclusion, addressing water pollution requires a multi-faceted approach that involves government intervention, technological advancements, public education, and community involvement. By taking action on multiple fronts, we can work towards cleaner and safer water for future generations.。
水污染处理文献综述英文
Application of multi-soil-layer system (MSL) in ruralwastewater treatmentAbstract:with the continuous improvement of living in rural farmers, the water consumption of residents is increasing, rural sewage emissions will continue to increase, if not treat effectively, the water environment in rural areas will be serious deteriorated, and influence the life quality of rural residents. In this case this paper presents a decentralized sewage treatment system, multi-soil-layer system technology (MSL) application in the rural sewage treatment, this paper summarizes the new technology, you can better understand and practice, especially in the developing countries where is in need of this technology. In the foreseeable future, it can protect public health and the sustainable development of the environment, and it also provides a new way for rural sewage treatment.Key words: rural sewage; multi-soil-layering system; distributed1.IntroductionIn recent years, with the continuous development of economy, people's living standards continue to improve, rural economic development is also very rapid, but the rural economic development and environmental development is not synchronized, serious rural water pollution.While high technical sewage treatment plants, such as centralized sewage treatment plants are involved in large investment costs, high operating costs,Because of economic constraints, such systems are less suitable for livestock farms and small communities in rural areas. While the multi-media-soil layer system(MSL) sewage treatment system, this decentralized sewage treatment system, it has less investment, low operating costs, high handling load. Besides, the utility model overcomes the defects of the prior soil percolation which is easy to be blocked from the space structure.The sewage treatment system is one kind of the purification technology of sewerage treatment soil developed in Japan in twentieth Century, the soil system will be modularized, and the module is set up around the water in the soil layer to avoid clogging, and adding natural organic materials to soil modules can improve the purification ability of the system.The MSL system consists of a Permeable layer (PL) and a soil mixing layer block (SMB),The Permeable layer is usually composed oflarger particles fillers such as gravel, pumice, perlite and zeolite.Higher porosity can effectively prevent clogging of the soil water layer.At the same time, the formation of aerobic environment is conducive to organic degradation.The mixed layer soil is mainly packing soil mixed with other 20%-30% other materials such as activated carbon, wood, iron and other material or soil with local resources.The organic material added in the soil mixed layer can improve the biological decomposition and adsorption capacity of the system, and can also improve the supply of hydrogen in the process of nitrogen removal and promote the removal of nitrogen.There are many researches on MSL system treating urban sewage, livestock wastewater and river water at home and abroad.Researchers in China, Ye Hai et al[1] studied the effect of surface load on polluted river water treated by multi-soil-layer system.Song Ying[2]had studied the treatment effect of multi medium soil infiltration system for turtle breeding wastewater.Zou Jun[3]also pointed out that multi-soil-layer material selection will have a certain impact on the domestic sewage treatment efficiency.In foreign countries, especially in Japan, Thailand and Indonesia, MSL systems have been used to handle various types of wastewater, but the domestic of this technology in sewage treatment in rural areas there is no comprehensive study,This article through to the MSL system technology processing rural domestic sewage research, inorder to provide some technical support for the MSL system in the practical application of rural sewage treatment.2.1characteristics of rural sewageFor a long time,China's pollution control on rural attention and investment far less than the city,96% of the villages without drainage pipe network and sewage treatment system,The random discharge of domestic sewage has become one of the main reasons for the deterioration of water quality in the basin, and is also an important factor causing the rural water environment pollution and lake eutrophication.At the same time, it seriously affects the safety of production and living in the rural areas, and seriously affects the economic development.The main features of rural sewage in China are:(1)The amount is huge and increases year by year.Statistics show that in 2002.There are 3.205 million tons of national rural domestic sewage daily emissions.The total nitrogen emission is about 283.1t, total phosphorus daily emission is about 56.6t, basically without any treatment directly discharged.(2)Water quality and water quantity fluctuation are huge.Rural sewage water is not stable, different periods have different water quality, generally do not contain heavy metals and toxic and harmful substances, but contains more synthetic detergent and bacteria, viruses.(3)More sources.In addition to human feces, kitchen generated sewage, there are household cleaning, domestic waste landfill leachate generated sewage, which will then enter the river part of the sewage, will cause greater pollution.(4)Low treatment rate.Part of the system can not run low temperature, rural sewage daily variation coefficient and seasonal variation coefficient, the system a few time high load operation, if there is little sewage, it will stop running [4].(5)Wide and scattered.Scattered geographical distribution of villages caused sewage dispersion and it is difficult to collect.2.2 the main source of rural sewageRural sewage refers to the formation of sewage of the rural areas in the life and production process, including rural production wastewater and rural domestic sewage two aspects.Rural domestic sewage refers to the residents living in the process of toilet discharge of sewage, bath, laundry and kitchen sewage, etc.Rural production sewage refers to livestock and poultry breeding, aquaculture, agricultural products processing and other high concentration of organic wastewater.Because China's rural living is scattered, rural domestic sewage showed a small amount and wide ck of appropriate sewage collection, treatment facilities, domestic sewage without treatment will be free to discharge, the health of rural residents to bring greater harm.At the sametime, rural sewage production also poses a greater threat to the rural ecological environment.2.3main technologies of decentralized domestic sewage treatmentBeginning in 1970s, Japan, the United States, Europe and other developed countries on the use of decentralized sewage treatment of rural sewage treatment, has accumulated a lot of experience, achieved good results.The United States since the mid-20th century began the construction of rural sewage treatment facilities, in 1972 promulgated the first complete clean water, then according to the distributed processing technology in 2002 promulgated the decentralized sewage treatment system application manual [5].1987, In Denmark promulgated a decentralized sewage treatment guidelines[6].Germany from 2003 to implement the decentralized needle infrastructure system project research, use membrane bioreactor purification to treat remote rural sewage[7]. Australia proposed a sewage treatment land use system [8].While research and application of rural sewage decentralized treatment in China began in late 1980s,Compared with developed countries and regions, there are still many gaps in laws and regulations system, technical standard system and management and service system.In recent years, domestic scholars have done a lot of research on rural domestic sewage,and puts forward some mature processing technology, including aerobic biological treatment, anaerobic biological treatment technology, soil infiltration technique andphysical and chemical processing technology etc.There are many scholars in the multi-soil-layer system improvement and application development of the Japanese, it has also done a lot of research, some scholars found through experiments: to earthworm soil infiltration layer can also solve the problem of blockage of MSL system, but also can guarantee the winter operation effect in winter [9-10].2.4 Multi-soil-layer system (MSL) technology2.4.1Structural characteristics of multi-media-soil layer systemMulti-soil-layer treatment (MSL) system is a kind of land sewage treatment system.Mainly composed of Permeable layer (PL) and a soil mixing layer block (SMB),From top to bottom are waterproof layer, gravel layer, soil layer and mixed layer (two alternately arranged), in addition, the MSL technology has a certain terrain fall from the inlet to the outlet, mainly by the drop let water can automatically flow in the system, at the same time to purify [11].2.4.2Purification mechanism of multi-soil-layer systemWastewater contains high concentrations of BOD, COD, ammonia nitrogen, phosphate ions and organic matter.When the wastewater into the MSL system, the organic matter in wastewater can be adsorbed on the surface of zeolite and soil through physical and chemical effects, followed by decomposition of soil layer in microorganism, and phosphorus removal is mainly through the soil layer of iron is oxidized toferric hydroxide after the formation of insoluble iron, then adsorption in wastewater the formation of phosphate coprecipitation.Nitrogen removal is mainly through nitrification and denitrification by ammonia ion, and finally reduced to nitrogen discharge system.2.4.3Advantages of multi-soil-layer systemMulti-media-soil layer system is used to treat wastewater from traditional soil infiltration system.It has the disadvantages of low treatment load, large ground, easy to block nitrogen and phosphorus removal and other shortcomings [12].The MSL system with "soil modular" as the core concept, its unique brick type internal structure can form a plurality of aerobic and anaerobic environment in order to promote the removal of pollutants,Among them, the permeable layer greatly improves the water permeability of the system to prevent clogging, adding natural materials in the soil increases the purification capacity of the system.3.ConclusionsWith the economic reform and development, China's environmental awareness is also improving, water pollution in rural areas have also obtained more and more attention,The MSL system applicable to the small population, scattered in rural areas, the decentralized sewage treatment system can be widely installed and used in the rural society, especially in rural areas of developing countries such as Chinese, Chinese is in need of such technology, sustainable development can protect thepublic health and the environment.4.Reference[1] Ye Hai Ye et al. Effect of surface load on polluted river water treated by multi-soil-layer system[J]. China water supply and drainage, 2012,28 (19): 74-77[2]Ying Song et al.Treatment of turtle aquaculture effluent by an multi-soil-layersystem[J].Journal of Zhejiang University Science B.2015,16(2):145-154[3]Zou Jun, Chen Xin et al. Effect of material selection of multi-soil-layer systemon domestic wastewater treatment efficiency[J]. Journal of ecology and rural environment, 2010,26 (1): 14-18[4]Zhang Keqiang et al. Rural sewage treatment technology[M]Beijing: ChinaAgricultural Science and Technology Press, 2006.10[5] Chen Jinming et al.Policy and experience of managing decentralized wastewatertreatment systems in the United States [J]. China water supply and drainage, 2004,20 (6): 104-106[6] Hans B.Danish guidelines for small-scale constructed wetland systems for onsitetreatment of domestic sewage[C].Proceedings of the 9th International Conference on Wetland Systems for Water Pollution Control, Avignon, France,2004:1-8[7] Li Wushuang, Wang Hongyang. Status and treatment technology of ruraldecentralized domestic wastewater [J]. Tianjin Agricultural Sciences, 2008,14 (6): 75-77[8] Zhang Jiawei, Zhou Zhiqin. Application of decentralized treatment technology forrural domestic sewage [J]. environmental science and management, 2011,36 (1): 95-99[9] Wang Xixi, Guo Feihong, et al. A new improved capillary infiltration ditch fordomestic wastewater treatment. [J].environmental chemistry,2011,30(3): 721-722 [10]Zhang Xiaowei, Li Jianchao, et al. Experimental study on earthworm enhancedland treatment of rural wastewater [J]. Journal of agro environmental science,2009,28 (6): 1225-1229[11]Hu Hongqi, Yang Yong et al. Analysis of practical application of two efficientrural sewage treatment technologies [J]. Heilongjiang environmental bulletin, 2016, 40 (1): 20-24[12] Xin Chen et al.An introduction of a multi-soil-layering system:a novel greentechnology for wastewater treatment in rural areas[J].Water and Environment Journal.2009:255-262。
关于治理水污染的英语作文
关于治理水污染的英语作文英文回答：Water pollution is a significant environmental concern that affects the health of both humans and aquatic ecosystems. It results from the introduction of harmful substances into water bodies, such as industrial effluents, sewage, agricultural runoff, and chemicals from household use.The consequences of water pollution are far-reaching and severe. Contaminants can accumulate in aquatic organisms, posing threats to human health when consumed as food sources. Additionally, water pollution disrupts the ecological balance of water bodies, leading to fish kills, eutrophication, and habitat degradation.Addressing water pollution requires a comprehensive approach involving various stakeholders. Governments play a crucial role in setting regulations, implementingenforcement mechanisms, and promoting sustainable practices. Industries can adopt environmentally friendly technologies, reduce waste generation, and ensure proper disposal of wastewater. Individuals can make a difference by adopting water-saving measures, using eco-friendly cleaning products, and disposing of waste responsibly.Local and international cooperation is essential to address transboundary water pollution and mitigate the effects of climate change, which can exacerbate waterquality issues. By sharing knowledge, resources, and best practices, countries can work together to find effective solutions to this pressing environmental challenge.中文回答：水污染。
解决水污染的办法英语作文
解决水污染的办法英语作文全文共3篇示例，供读者参考篇1With the rapid industrialization and urbanization, water pollution has become a severe environmental issue worldwide. Water pollution not only affects aquatic ecosystems but also poses a threat to human health. Therefore, it is crucial to find effective solutions to combat water pollution. In this essay, I will discuss several methods to address water pollution and protect our precious water resources.The first and foremost solution to tackle water pollution is to implement stricter regulations and enforcement. Governments should establish and enforce laws and regulations to control the discharge of pollutants into water bodies. Industries should be required to treat their wastewater before releasing it into rivers or oceans. Additionally, penalties for violating environmental regulations should be increased to deter polluters from committing further environmental harm. By enforcing strict regulations, we can prevent water pollution at the source and protect our water resources.Another effective way to address water pollution is to promote sustainable practices in agriculture. Farmers should be encouraged to adopt practices that reduce the use of chemical fertilizers and pesticides, which are major sources of water pollution. Implementing organic farming methods, rotating crops, and using natural fertilizers can help prevent agricultural runoff from contaminating water bodies. By promoting sustainable agriculture, we can minimize the impact of farming activities on water quality and protect our water resources for future generations.In addition to regulations and sustainable practices, investing in wastewater treatment infrastructure is essential to combat water pollution. Municipalities should upgrade and expand their wastewater treatment plants to ensure that sewage is properly treated before being discharged into water bodies. Advanced treatment technologies, such as membrane filtration and ultraviolet disinfection, can remove a wide range of pollutants from wastewater and improve water quality. By investing in wastewater treatment infrastructure, we can reduce the amount of pollutants entering our water bodies and maintain clean and healthy water resources.Furthermore, public awareness and education play a vital role in addressing water pollution. People should be educated about the causes and effects of water pollution, as well as the ways they can contribute to its prevention. Simple actions, such as properly disposing of household chemicals, picking up litter, and conserving water, can have a significant impact on reducing water pollution. By raising public awareness and promoting environmental education, we can empower individuals to take action and protect our water resources.In conclusion, water pollution is a pressing environmental issue that requires immediate action. By implementing stricter regulations, promoting sustainable practices, investing in wastewater treatment infrastructure, and raising public awareness, we can effectively address water pollution and safeguard our water resources. It is essential for governments, industries, and individuals to work together to protect our precious water bodies for present and future generations. Only by taking collective action can we ensure clean and healthy water for all.篇2Water pollution is a growing problem around the world, caused by various factors such as industrial waste, agriculturalrunoff, and improper disposal of garbage. The contamination of water sources poses a serious threat to the environment, public health, and aquatic life. Therefore, it is crucial to take immediate action to address this issue and work towards solutions to resolve water pollution.One of the key solutions to combat water pollution is to implement strict regulations and policies on industries and businesses that release harmful chemicals and waste into water bodies. Governments should enforce laws that require companies to treat their wastewater before discharging it into rivers, lakes, and oceans. By holding companies accountable for their actions and imposing strict penalties for non-compliance, we can reduce the amount of pollutants entering our water sources.In addition to regulating industrial pollution, we must also tackle the issue of agricultural runoff, which contributes to water pollution through the use of fertilizers and pesticides. Farmers should be encouraged to adopt sustainable farming practices that minimize the use of chemicals and protect the soil and water from contamination. Government subsidies and incentives can be offered to farmers who implement measures such as croprotation, cover cropping, and proper waste management to prevent runoff from entering water bodies.Another effective way to address water pollution is through public education and awareness campaigns. By educating the public about the importance of clean water and the impact of pollution on our health and environment, we can empower individuals to take action in their daily lives. Simple measures such as reducing plastic waste, properly disposing of household chemicals, and conserving water can make a significant difference in reducing pollution and protecting our water sources.Investing in water treatment infrastructure is also essential to combat water pollution. By upgrading existing wastewater treatment plants and building new facilities in areas with inadequate infrastructure, we can improve the quality of water that is discharged back into the environment. Advanced treatment technologies such as filtration, disinfection, and nutrient removal can help remove harmful contaminants and pollutants from wastewater, ensuring that our water sources remain clean and safe for consumption.Furthermore, cooperation and collaboration are key to solving the global challenge of water pollution. Governments,businesses, non-profit organizations, and communities must work together to develop comprehensive strategies and initiatives to address the root causes of pollution and protect our water resources for future generations. By sharing knowledge, resources, and best practices, we can achieve greater impact and make a lasting difference in the fight against water pollution.In conclusion, water pollution is a serious and pressing issue that requires immediate attention and action. By implementing regulations, promoting sustainable practices, raising awareness, investing in infrastructure, and fostering collaboration, we can work towards effective solutions to prevent and reduce water pollution. It is up to all of us to take responsibility for protecting our water sources and ensuring a clean and healthy environment for all. Only by working together can we overcome this challenge and safeguard our precious water resources for the future.篇3Title: Solutions to Water PollutionIn recent years, water pollution has become a serious issue that threatens human health and ecosystems. Industrial activities, agricultural runoff, and inadequate waste management are some of the main contributors to water pollution. In order to tackle thisgrowing problem, it is essential to implement effective solutions to prevent further contamination and restore the quality of our water resources.One of the key strategies to combat water pollution is to improve wastewater treatment processes. Many industries discharge untreated or poorly treated wastewater into rivers and lakes, leading to contamination of water sources. By investing in advanced treatment technologies and enforcing stricter regulations on effluent discharge, we can significantly reduce the amount of pollutants entering our water bodies.Another important step in addressing water pollution is to promote sustainable agriculture practices. Excessive use of chemical fertilizers and pesticides in agriculture contributes to nutrient pollution and toxic algal blooms in water bodies. Encouraging farmers to adopt organic farming methods, practice crop rotation, and use eco-friendly pest control measures can help to reduce the amount of pollutants reaching our water sources.Furthermore, public awareness and education play a crucial role in preventing water pollution. By educating the public about the importance of preserving water quality and the negative impacts of pollution, we can foster a sense of responsibility andencourage individuals to take actions to protect our water resources. Initiatives such as community clean-up events, water conservation campaigns, and school education programs can help raise awareness and promote sustainable behaviors.In addition to prevention measures, it is also essential to implement remediation techniques to clean up polluted water bodies. Technologies such as bioremediation, chemical oxidation, and sediment dredging can be used to remove contaminants and restore the ecological balance of affected water systems. Collaborative efforts between government agencies, environmental organizations, and local communities are crucial to successfully implement these remediation projects.Overall, addressing water pollution requires a multi-faceted approach that includes prevention, remediation, and public participation. By implementing effective solutions and working together to protect our water resources, we can ensure a clean and healthy environment for future generations. It is crucial that we take action now to safeguard our water sources and preserve the biodiversity of our ecosystems. Remember, every drop counts in the fight against water pollution. Let's act now before it's too late.。
水污染解决英语作文
水污染解决英语作文Water pollution is a serious issue that affects ecosystems, human health, and the environment as a whole.It is caused by various factors such as industrial waste, agricultural runoff, and improper disposal of household chemicals. 。
One way to address water pollution is through stricter regulations and enforcement of laws. By holding polluters accountable for their actions and imposing fines for violations, we can deter companies and individuals from contaminating our water sources.Another solution is to invest in technology and infrastructure that can help prevent water pollution. This includes upgrading wastewater treatment plants, implementing green infrastructure projects, and developing new filtration systems to remove pollutants from water.Education and awareness are also key in combating waterpollution. By teaching people about the importance of clean water and the impact of pollution, we can encourage individuals to make more sustainable choices in their daily lives.Community involvement is essential in addressing water pollution. By organizing clean-up events, advocating for clean water policies, and supporting local conservation efforts, we can work together to protect our water resources for future generations.In conclusion, water pollution is a complex issue that requires a multi-faceted approach to solve. By implementing stricter regulations, investing in technology, educating the public, and engaging with communities, we can make a positive impact on the health of our waterways. It is up to all of us to take action and protect this vital resourcefor the well-being of our planet.。
解决水污染的办法英语作文
解决水污染的办法英语作文In recent years, water pollution has become an increasing concern all around the world. The contamination of our water sources not only affects the health of humans, but also harms the environment and wildlife. It is imperative that we take immediate action to address this serious issue.There are several effective solutions to combat water pollution. One of the most important measures is to ensure that all industrial and agricultural waste is properly treated before being released into water bodies. This can be achieved through the implementation of strict regulations and policies that require businesses to use proper disposal methods and technologies. Additionally, governments can provide incentives for industries to adopt environmentally friendly practices and invest in water treatment facilities.Another important strategy is to raise awareness about the importance of protecting our water sources. This can be done through educational programs in schools, community outreach campaigns, and advertising initiatives. By educating the public about the detrimental effects of water pollution and the steps that can be taken to prevent it, we can instill a sense of responsibility and encourage individuals to take action.Furthermore, investing in water infrastructure and technology is crucial in addressing water pollution. This includes upgrading water treatment plants, increasing the capacity of sewage systems, and implementing advanced filtration and purification techniques. By improving our water infrastructure, we can better protect our water sources and ensure that clean water is readily available to all.Another effective approach is to implement watershed management plans to protect and preserve the quality of our water sources. This involves coordinating efforts from multiple stakeholders, including government agencies, non-profit organizations, and local communities, to monitor water quality, identify sources of pollution, and implement conservation measures. By taking a holistic approach to watershed management, we can effectively safeguard our water resources for future generations.In conclusion, water pollution is a pressing issue that requires immediate action. By implementing strict regulations, raising awareness, investing in water infrastructure, and implementing watershed management plans, we can effectively combat water pollution and protect our precious water sources.It is our responsibility to take action now to ensure a clean and sustainable water supply for future generations.。
水污染解决英语作文
水污染解决英语作文Water Pollution and Its Solutions。
Water pollution is a major issue that affects not only the environment but also the health and well-being of all living organisms. It occurs when harmful substances such as chemicals, waste, and other pollutants contaminate bodies of water, making them unsafe for consumption and damaging the ecosystems that rely on them. In this essay, we will explore the causes and effects of water pollution and discuss potential solutions to this pressing problem.There are many sources of water pollution, including industrial waste, agricultural runoff, and improper disposal of household chemicals. Factories and industrial facilities often release toxic chemicals and waste into nearby waterways, contaminating them and harming the plants and animals that rely on them. Similarly, agricultural runoff, which includes pesticides, fertilizers, and animal waste, can seep into rivers and lakes, causing algal bloomsand other harmful effects. In addition, improper disposal of household chemicals, such as cleaning products and pharmaceuticals, can also contribute to water pollution.The effects of water pollution are far-reaching and can have serious consequences for both the environment and human health. Contaminated water can harm aquatic life, leading to a decline in fish populations and the destruction of fragile ecosystems. In addition, polluted water can also have negative effects on human health, causing illnesses and diseases such as gastrointestinal problems, skin rashes, and even cancer. Furthermore, water pollution can also have economic impacts, as it can lead to the closure of fisheries, the loss of tourism revenue, and the need for costly clean-up efforts.Despite the serious nature of water pollution, there are several potential solutions that can help mitigate this problem. One of the most important steps is to regulate and monitor industrial and agricultural activities to ensure that they are not releasing harmful substances into waterways. This can be achieved through the implementationof strict environmental regulations and the enforcement of penalties for non-compliance. In addition, the development and use of eco-friendly alternatives to harmful chemicals and waste products can also help reduce water pollution.Another important solution to water pollution is the improvement of wastewater treatment facilities. Byinvesting in advanced treatment technologies and infrastructure, we can ensure that harmful substances are removed from wastewater before it is released back into the environment. This can help prevent the contamination of water bodies and protect the health of both aquatic life and human populations. Furthermore, promoting public awareness and education about the importance of water conservation and pollution prevention can also help reduce the amount of harmful substances that are released into the environment.In conclusion, water pollution is a serious issue that has far-reaching consequences for the environment, human health, and the economy. However, by implementing strict regulations, investing in advanced treatment technologies,and promoting public awareness, we can work towards reducing and preventing water pollution. It is essential that we take action now to protect our water resources and ensure a sustainable and healthy future for all.。
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Application of multi-soil-layer system (MSL) in ruralwastewater treatmentAbstract:with the continuous improvement of living in rural farmers, the water consumption of residents is increasing, rural sewage emissions will continue to increase, if not treat effectively, the water environment in rural areas will be serious deteriorated, and influence the life quality of rural residents. In this case this paper presents a decentralized sewage treatment system, multi-soil-layer system technology (MSL) application in the rural sewage treatment, this paper summarizes the new technology, you can better understand and practice, especially in the developing countries where is in need of this technology. In the foreseeable future, it can protect public health and the sustainable development of the environment, and it also provides a new way for rural sewage treatment.Key words: rural sewage; multi-soil-layering system; distributed 1.IntroductionIn recent years, with the continuous development of economy, people's living standards continue to improve, rural economic development is also very rapid, but the rural economic development and environmental development is not synchronized, serious rural water pollution.While high technical sewage treatment plants, such ascentralized sewage treatment plants are involved in large investment costs, high operating costs,Because of economic constraints, such systems are less suitable for livestock farms and small communities in rural areas. While the multi-media-soil layer system(MSL) sewage treatment system, this decentralized sewage treatment system, it has less investment, low operating costs, high handling load. Besides, the utility model overcomes the defects of the prior soil percolation which is easy to be blocked from the space structure.The sewage treatment system is one kind of the purification technology of sewerage treatment soil developed in Japan in twentieth Century, the soil system will be modularized, and the module is set up around the water in the soil layer to avoid clogging, and adding natural organic materials to soil modules can improve the purification ability of the system.The MSL system consists of a Permeable layer (PL) and a soil mixing layer block (SMB),The Permeable layer is usually composed of larger particles fillers such as gravel, pumice, perlite and zeolite.Higher porosity can effectively prevent clogging of the soil water layer.At the same time, the formation of aerobic environment is conducive to organic degradation.The mixed layer soil is mainly packing soil mixed with other 20%-30% other materials such as activated carbon, wood, iron and other material or soil with local resources.The organic material added in the soil mixed layer can improve the biological decomposition andadsorption capacity of the system, and can also improve the supply of hydrogen in the process of nitrogen removal and promote the removal of nitrogen.There are many researches on MSL system treating urban sewage, livestock wastewater and river water at home and abroad.Researchers in China, Ye Hai et al[1] studied the effect of surface load on polluted river water treated by multi-soil-layer system.Song Ying[2]had studied the treatment effect of multi medium soil infiltration system for turtle breeding wastewater.Zou Jun[3]also pointed out that multi-soil-layer material selection will have a certain impact on the domestic sewage treatment efficiency.In foreign countries, especially in Japan, Thailand and Indonesia, MSL systems have been used to handle various types of wastewater, but the domestic of this technology in sewage treatment in rural areas there is no comprehensive study,This article through to the MSL system technology processing rural domestic sewage research, in order to provide some technical support for the MSL system in the practical application of rural sewage treatment.2.1characteristics of rural sewageFor a long time,China's pollution control on rural attention and investment far less than the city,96% of the villages without drainage pipe network and sewage treatment system,The random discharge ofdomestic sewage has become one of the main reasons for the deterioration of water quality in the basin, and is also an important factor causing the rural water environment pollution and lake eutrophication.At the same time, it seriously affects the safety of production and living in the rural areas, and seriously affects the economic development.The main features of rural sewage in China are:(1)The amount is huge and increases year by year.Statistics show that in 2002.There are 3.205 million tons of national rural domestic sewage daily emissions.The total nitrogen emission is about 283.1t, total phosphorus daily emission is about 56.6t, basically without any treatment directly discharged.(2)Water quality and water quantity fluctuation are huge.Rural sewage water is not stable, different periods have different water quality, generally do not contain heavy metals and toxic and harmful substances, but contains more synthetic detergent and bacteria, viruses.(3)More sources.In addition to human feces, kitchen generated sewage, there are household cleaning, domestic waste landfill leachate generated sewage, which will then enter the river part of the sewage, will cause greater pollution.(4)Low treatment rate.Part of the system can not run low temperature, rural sewage daily variation coefficient and seasonalvariation coefficient, the system a few time high load operation, if there is little sewage, it will stop running [4].(5)Wide and scattered.Scattered geographical distribution of villages caused sewage dispersion and it is difficult to collect.2.2 the main source of rural sewageRural sewage refers to the formation of sewage of the rural areas in the life and production process, including rural production wastewater and rural domestic sewage two aspects.Rural domestic sewage refers to the residents living in the process of toilet discharge of sewage, bath, laundry and kitchen sewage, etc.Rural production sewage refers to livestock and poultry breeding, aquaculture, agricultural products processing and other high concentration of organic wastewater.Because China's rural living is scattered, rural domestic sewage showed a small amount and wide ck of appropriate sewage collection, treatment facilities, domestic sewage without treatment will be free to discharge, the health of rural residents to bring greater harm.At the same time, rural sewage production also poses a greater threat to the rural ecological environment.2.3main technologies of decentralized domestic sewage treatmentBeginning in 1970s, Japan, the United States, Europe and other developed countries on the use of decentralized sewage treatment of ruralsewage treatment, has accumulated a lot of experience, achieved good results.The United States since the mid-20th century began the construction of rural sewage treatment facilities, in 1972 promulgated the first complete clean water, then according to the distributed processing technology in 2002 promulgated the decentralized sewage treatment system application manual [5].1987, In Denmark promulgated a decentralized sewage treatment guidelines[6].Germany from 2003 to implement the decentralized needle infrastructure system project research, use membrane bioreactor purification to treat remote rural sewage[7]. Australia proposed a sewage treatment land use system [8].While research and application of rural sewage decentralized treatment in China began in late 1980s,Compared with developed countries and regions, there are still many gaps in laws and regulations system, technical standard system and management and service system.In recent years, domestic scholars have done a lot of research on rural domestic sewage,and puts forward some mature processing technology, including aerobic biological treatment, anaerobic biological treatment technology, soil infiltration technique and physical and chemical processing technology etc.There are many scholars in the multi-soil-layer system improvement and application development of the Japanese, it has also done a lot of research, some scholars found through experiments: to earthworm soil infiltration layer can also solve the problem of blockage of MSL system, but also canguarantee the winter operation effect in winter [9-10].2.4 Multi-soil-layer system (MSL) technology2.4.1Structural characteristics of multi-media-soil layer systemMulti-soil-layer treatment (MSL) system is a kind of land sewage treatment system.Mainly composed of Permeable layer (PL) and a soil mixing layer block (SMB),From top to bottom are waterproof layer, gravel layer, soil layer and mixed layer (two alternately arranged), in addition, the MSL technology has a certain terrain fall from the inlet to the outlet, mainly by the drop let water can automatically flow in the system, at the same time to purify [11].2.4.2Purification mechanism of multi-soil-layer systemWastewater contains high concentrations of BOD, COD, ammonia nitrogen, phosphate ions and organic matter.When the wastewater into the MSL system, the organic matter in wastewater can be adsorbed on the surface of zeolite and soil through physical and chemical effects, followed by decomposition of soil layer in microorganism, and phosphorus removal is mainly through the soil layer of iron is oxidized to ferric hydroxide after the formation of insoluble iron, then adsorption in wastewater the formation of phosphate coprecipitation.Nitrogen removal is mainly through nitrification and denitrification by ammonia ion, and finally reduced to nitrogen discharge system.2.4.3Advantages of multi-soil-layer systemMulti-media-soil layer system is used to treat wastewater from traditional soil infiltration system.It has the disadvantages of low treatment load, large ground, easy to block nitrogen and phosphorus removal and other shortcomings [12].The MSL system with "soil modular" as the core concept, its unique brick type internal structure can form a plurality of aerobic and anaerobic environment in order to promote the removal of pollutants,Among them, the permeable layer greatly improves the water permeability of the system to prevent clogging, adding natural materials in the soil increases the purification capacity of the system. 3.ConclusionsWith the economic reform and development, China's environmental awareness is also improving, water pollution in rural areas have also obtained more and more attention,The MSL system applicable to the small population, scattered in rural areas, the decentralized sewage treatment system can be widely installed and used in the rural society, especially in rural areas of developing countries such as Chinese, Chinese is in need of such technology, sustainable development can protect the public health and the environment.4.Reference[1] Ye Hai Ye et al. Effect of surface load on polluted river water treated by multi-soil-layer system[J]. China water supply and drainage, 2012,28 (19): 74-77[2]Ying Song et al.Treatment of turtle aquaculture effluent by an multi-soil-layersystem[J].Journal of Zhejiang University Science B.2015,16(2):145-154[3]Zou Jun, Chen Xin et al. Effect of material selection of multi-soil-layer systemon domestic wastewater treatment efficiency[J]. Journal of ecology and rural environment, 2010,26 (1): 14-18[4]Zhang Keqiang et al. Rural sewage treatment technology[M]Beijing: ChinaAgricultural Science and Technology Press, 2006.10[5] Chen Jinming et al.Policy and experience of managing decentralized wastewatertreatment systems in the United States [J]. China water supply and drainage, 2004,20 (6): 104-106[6] Hans B.Danish guidelines for small-scale constructed wetland systems for onsitetreatment of domestic sewage[C].Proceedings of the 9th International Conference on Wetland Systems for Water Pollution Control, Avignon, France,2004:1-8[7] Li Wushuang, Wang Hongyang. Status and treatment technology of ruraldecentralized domestic wastewater [J]. Tianjin Agricultural Sciences, 2008,14 (6): 75-77[8] Zhang Jiawei, Zhou Zhiqin. Application of decentralized treatment technology forrural domestic sewage [J]. environmental science and management, 2011,36 (1):95-99[9] Wang Xixi, Guo Feihong, et al. A new improved capillary infiltration ditch fordomestic wastewater treatment. [J].environmental chemistry,2011,30(3): 721-722[10]Zhang Xiaowei, Li Jianchao, et al. Experimental study on earthworm enhancedland treatment of rural wastewater [J]. Journal of agro environmental science,2009,28 (6): 1225-1229[11]Hu Hongqi, Yang Yong et al. Analysis of practical application of two efficientrural sewage treatment technologies [J]. Heilongjiang environmental bulletin, 2016, 40 (1): 20-24[12] Xin Chen et al.An introduction of a multi-soil-layering system:a novel greentechnology for wastewater treatment in rural areas[J].Water and EnvironmentJournal.2009:255-262。