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Due to the rapid development of modern industry and urbanization, the flooding of solid waste has become an environmental pollution problem. Once garbage is generated, the wind will blow fine particles into the air, causing pollution of the atmospheric environment.
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1. Composting method. The composting process is to make the organic matter in the garbage, under the action of microorganisms, carry out a biochemical reaction, and finally form a similar rot.
2. Composting method. The composting process is to make the organic matter in the garbage, under the action of microorganisms, undergo a biochemical reaction, and finally form a substance similar to humus soil, which can be used as fertilizer or soil improvement.
3. Pyrolysis method. Pyrolysis is a high-temperature pyrolysis technology of organic matter under anaerobic or anoxic conditions, which uses heat energy to break the polymer compound, and converts large molecular weight organic matter into small molecule combustible gas, liquid fuel and coke.
4. Incineration method. Municipal waste incineration can achieve the purposes of heat energy, volume reduction, weight reduction, high temperature sterilization, etc., and has obvious advantages in environmental protection and resource utilization.
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The municipal waste disposal methods are described as follows:
1) Compression. For some municipal garbage with low density and large volume, the volume can be reduced after pressurization and compression, which is convenient for transportation and landfill. Some waste can be compressed to become high-density inert materials and building materials.
2) Landfill. The basic conditions that can be provided by various places can be used to adopt different landfill methods to meet the requirements of operation and consumption. Landfill can not only deal with the mixed waste of the city, but also absorb the leftovers of other waste treatment processes and the waste that can no longer be used.
3) Waste incineration. The heat energy generated after waste incineration can be used to produce steam or electricity, and can also be used for heating or production needs. According to calculations, for every 5 tons of garbage, 1 ton of standard fuel can be saved.
However, waste incineration plants must be equipped with smoke and dust removal devices to reduce the emission of pollutants into the atmosphere.
4) Composting. Composting is a biochemical process that uses microorganisms to decompose waste, precipitate carbon dioxide, water and heat, and generate humus at the same time.
Introduction to Municipal Waste:
Municipal waste is a mixture of solid waste in the city, including industrial waste, construction waste and domestic waste. The quantity, nature and degree of environmental pollution of industrial waste residue vary greatly and should be managed in a unified manner.
Depending on the situation, each plant will be placed in a designated area after meeting the emission standards directly or after treatment. Construction waste is generally non-polluting solids and can be disposed of by landfill. Domestic garbage is a solid waste residue produced by people in their lives, with a wide range of types, including organic and inorganic substances, which should be classified, collected, cleaned and disposed of.
The above content reference: Encyclopedia - Municipal Waste.
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1. Now the more common urban garbage treatment methods are landfill, composting and incineration, different countries contain good Cong family treatment of urban garbage There are certain differences, China in the treatment of urban garbage when talking about cherry blossoms are based on sanitary landfill and high-temperature composting.
2. Now socks sail in many cities have begun to implement the garbage classification policy, which can provide some help for the disposal of urban garbage. Because if we classify the garbage when it is discarded, the garbage can be quickly sorted and disposed of centrally.
3. Now garbage can generally be divided into four categories, which are the garbage that can be reused and reused, the wet garbage that is perishable and biomass, the hazardous garbage that is harmful to health and the natural environment, and the dry garbage that is not among the above three categories.
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There are several common garbage disposal methods in China, mainly divided into landfill method, incineration method and composting method, the most environmentally friendly method is the first utilization method, so as to avoid waste, and can also avoid polluting the environment.
In some developing countries, the most common method of waste disposal is the landfill method, although this method is very simple, but it is easy to cause pollution to the environment, for example, some plastics are buried in the soil, which cannot be degraded for decades, which has a great impact on the environment. There is also the incineration method, which is also very polluting to the environment, and there are many pollutants released in the incineration process, and it also has adverse effects on the human body.
Therefore, now China has accelerated the reform of garbage disposal methods, advocating the classification of garbage will be able to be the first and not the most hazardous garbage and other garbage for classification and treatment, which has greatly improved the environmental quality and resource utilization.
Composting is also a good way to dispose of waste, as it reuses waste, has a lower environmental impact, and provides nutrients for crops.
Hello! In recent years, with the continuous development of major cities, the amount of domestic waste generated by urban residents has also increased, and by 2000, the total annual garbage removal and transportation in the country has exceeded 100 million tons, and increased by 8. Over the years, the total amount of garbage piled up in disorder in the country has reached 6 billion tons, occupying 500 million square meters of land, seriously polluting the atmosphere and groundwater resources, and causing gas accidents. >>>More
Due to the rapid development of modern industry and urbanization, the flooding of solid waste has become an environmental pollution problem. Once garbage is generated, the wind will blow fine particles into the air, causing pollution of the atmospheric environment.
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