So far, the commonly used garbage disposal methods in China are sanitary landfill, composting and direct incineration. The basic characteristics of these three garbage disposal methods are as follows:
1, sanitary landfill method: low harmlessness, large area and slow garbage decomposition, which generally takes 10~20 years. Landfill areas are prone to produce biogas and toxic sewage, polluting air, soil, groundwater and surface water. And it is easy to cause urban garbage to have nowhere to pile up.
2. Composting method: through the biochemical action of microorganisms, the organic matter in garbage is decomposed and converted into fertilizer. This method has higher requirements for waste composition, low fertilizer efficiency and long manufacturing cycle, which is not suitable for the rapid growth of municipal waste. Its initial investment and operation cost are higher than sanitary landfill.
3. Direct incineration method: it can realize the harmlessness, reduction and resource utilization of municipal solid waste.
Extended data:
Implementing the whole process management of domestic waste is related to the living environment, resource conservation and social civilization of the broad masses of people. Carrying out garbage sorting can not only effectively use recyclable materials, turn waste into treasure and protect the environment, but also comprehensively reflect the management ability and citizens' quality of a city. It is an important symbol of urban civilization, which is beneficial to the present and the future.
1. First of all, the difficulty of garbage classification lies in how the garbage is in the right place. Relevant departments need to strengthen guidance and education, popularize knowledge of garbage classification, cultivate residents' good living habits, make the concept of garbage classification deeply rooted in people's hearts, and reduce the generation of garbage from the source. Let residents know clearly which garbage belongs to recycling and which belongs to harmful waste, and separate dry from wet when dealing with garbage.
2. Secondly, the difficulty of garbage classification lies in how to persevere. Garbage sorting is a job that water drops and stones wear out, and we should have the spirit of "step by step, even a long way". On the one hand, it is a process of forming residents' living habits, which requires the support of various software and hardware provided by the society and the competent authorities.
On the other hand, the management department should form a long-term mechanism for garbage classification through legislation. Use the authority and coercive power of the law to promote garbage classification and ensure that garbage classification can be effectively implemented.
3. Finally, garbage classification is difficult to coordinate from the front end to the terminal. Garbage classification is only a link in the process of garbage disposal. Garbage disposal needs the joint participation of the government, enterprises, communities and residents, and it is an interlocking chain. Problems in any link will affect the final treatment effect.
In this process, all links should bear corresponding responsibilities, so as to supervise each other and make up for each other, and it is everyone's responsibility to truly realize garbage classification.
Baidu encyclopedia-garbage treatment plant
People's Daily Online-People's EIA: Garbage classification should be persistent.