Abstract: Domestic waste landfills are gradually withdrawing from the stage of history, but the landfill waste stabilization cycle is long, in its degradation process will continue to produce leachate and landfill gas, which has a greater risk. In recent years, the excavation and screening resource utilization technology, which can completely eliminate the risk of waste storage and free up land resources, has been increasingly favored by the market. And the safety and environmental risks of landfill gas generated by excavation and sieving of garbage are the key problems faced by this technology. The rapid ventilation pretreatment technology proposing in this study can quickly reduce the landfill gas pollution load in the garbage pile, effectively guarantee the safe excavation of garbage and reduce the impact of odor, and the technology has the characteristics of rapid well construction, rapid installation and transfer, as well as good match with the excavation construction. Field tests were carried out to optimize the design of process operation parameters and verify the treatment effect of this technology. Result showed that after 7 days of rapid ventilation pretreatment, the methane concentration in the landfill body could be less than 2.5%, which could meet the limit requirements of GB 14554—1993 Emission Standards for Odor Pollutants.

Key words: landfill, waste excavation, landfill gas risk, speedy, pre-treatment