1. Advantages of landfilling waste:
Sanitary landfill has the advantages of mature technology and low treatment costs. It is currently the main method of centralized disposal of urban waste in my country. Utilizing potholes to bury urban garbage can not only dispose of waste, but also cover soil to create land and protect the environment. The investment is slightly less, the process is simple, the processing capacity is large, and the surface is relatively harmless.
2. Disadvantages of landfilled garbage:
The landfilled garbage has not been treated harmlessly, and a large number of bacteria and viruses remain; there are also hidden dangers such as heavy metal pollution from biogas ; Its garbage leakage will also pollute groundwater resources for a long time, potentially causing great harm and causing endless troubles to future generations.
This method not only fails to realize the resource treatment of garbage, but also occupies a large amount of land, which is a dangerous practice that leaves the source of pollution to future generations. Many developed countries have banned landfill waste. Competent departments at all levels of our country's government have gradually become aware of the problems existing in this processing technology and are bound to ban and eliminate such behavior.
Extended information
The main methods of municipal waste landfill are:
(1) Sanitary landfill. Pour a layer of municipal waste (60 cm thick), compact it, and cover it with 15 cm thick soil, sand or fly ash, repeat this process, and finally cover it with 90-120 cm of topsoil.
(2) Compressed garbage landfill. Compressing the garbage and then backfilling it can prevent fire, prevent the breeding of mosquitoes, and slow decomposition.
(3) Broken garbage is landfilled. It can prevent fire and is conducive to the reproduction of aerobic bacteria. The lowest point of the municipal waste landfill site should be more than 3 meters above the groundwater level, and anti-seepage and exhaust measures should be taken in the landfill site. After the landfill is closed, it can be used as a green space, and no permanent buildings can be built on it.
Baidu Encyclopedia-Landfill