Compared to other saturated landfill projects, the method of excavating and incinerating stale garbage is relatively "non mainstream". Many people have raised doubts online about the practice of excavating and incinerating landfill waste, mainly focusing on the duplication of costs and insufficient aging heat value. Since it has already been buried at such a high cost, why dig it up and burn it? Digging out garbage also involves labor, machinery, and transportation costs. What is the significance of digging it out?

1. Extend the lifespan of landfill sites: Save landfill land and extend the service life of landfill sites. In addition, land resources can also be obtained for the reuse of landfills.

2. Remediation of non-standard landfill sites in the early stage: The existing large number of non-standard landfill sites, due to the lack of effective protective measures during operation, have generated pollution such as water, gas, and odors, which have also caused harm to groundwater. By treating stale garbage, the original sources of pollution can be eliminated.

3. Anti leakage inspection and repair: After more than 20 years of use, the bottom anti-seepage layer of some landfill pits may be damaged, and this opportunity can be used for repair.

Compared to the daily disposal of household waste, the cost of excavating and incinerating already buried garbage significantly increases. The editor of the stale garbage treatment equipment introduces that currently, it costs about 127 yuan to excavate 1 cubic meter of garbage, and the value of each set of garbage screening equipment is about 12.76 million yuan. As for the subsequent processing costs, they need to be calculated according to the specific processing technology. As for whether the land can be reused after excavating the garbage mountain, it still needs to be tested for eight metals: arsenic, mercury, cadmium, chromium, copper, nickel, zinc, and manganese. Heavy metal exceeding the standard must be rectified. Landfill sites are prohibited from being used as construction land for permanent buildings (structures) without being appraised by professional technical departments.

In response to the issue of the cost of disposing of stale garbage, the incineration of buried garbage is mainly carried out in first tier cities like Beijing where land resources are precious. The original landfill site can be renovated and used for commercial development. Compared to the later land use value, the processing cost is only a drop in the bucket. It is reported that currently, the field of stale garbage treatment is gradually developing with related demands. Manufacturers of stale garbage treatment equipment are focusing on technology research and development, improving resource efficiency, and reducing costs.