With the changes of the times, rapid development will inevitably give rise to problems - the astonishing increase in the amount of garbage.

 

According to public reports, the average annual growth rate of garbage worldwide is 8.42%, while the average annual growth rate of garbage in China has exceeded 10%. For a long time, the main method of disposing of household waste in China has been landfill, and many cities' landfill sites have become over saturated. Due to the lack of harmless and reduced treatment, serious problems such as land waste and environmental pollution have been caused.

 

The large amount of garbage stock occupies urban land. According to statistics during the 13th Five Year Plan period, the stock of domestic waste in China has exceeded 8 billion tons, occupying 500 million square meters of land. In history, the landfill sites that surrounded old built-up areas have been surrounded by new built-up areas, resulting in a phenomenon of "cutting corners" to grab land and wasting a lot of valuable land resources.

 

The continuous production of high concentration leachate from landfills seriously pollutes groundwater, making it difficult for nearby residents to live a healthy life; The emitted gas contains a large amount of methane, which is an important fire hazard; Methane gas can seriously cause atmospheric warming and harm the global climate. In recent years, Guangdong, Zhejiang and other places have piloted and explored the cleaning of landfill sites for aged garbage, achieving significant social, economic and ecological benefits.

 

One is to increase land supply. Research shows that comprehensively carrying out the cleaning of stale garbage landfills can increase land supply by 300 million square meters and alleviate the problem of land supply shortage. Secondly, it is beneficial for environmental protection. It is predicted that the comprehensive cleaning of stale garbage landfills can reduce greenhouse gas emissions by 200 to 300 million tons of carbon dioxide equivalent per year. The third is to save urban operation and maintenance costs, eliminating the need to pay for garbage leachate treatment fees and regular renewal fees for landscaping.. The fourth is to increase power generation. By incinerating the combustible RDF cleared from landfills, it can increase the power generation efficiency of enterprises and contribute to achieving carbon peak. Five is to generate economic benefits. According to a study by the China Academy of Urban Construction, the comprehensive cleaning of landfill sites for stale garbage will increase green electricity by 150-200 billion kilowatt hours annually. Combined with the increased land supply, it can generate economic benefits exceeding 1 trillion yuan