生活垃圾填埋场密闭工程对填埋气收集的影响

Influence on Landfill Gas Collection Caused by Landfill Airtight Project

以六里屯垃圾填埋场为例,通过对比密闭工程实施前后填埋气收集量和收集率的变化,即密闭工程实施后6 a内,填埋气平均收集效率高出其实施前平均收集率32个百分点。实践表明,在生活垃圾填埋场实施密闭工程,可以将生活垃圾堆体与大气等外界环境进行隔离,减少填埋气向外界扩散的数量,增大填埋气管网收集气体的数量,从而提高填埋气的收集率。

Taking Liulitun landfill as an example,by comparing the variation of landfill gas collection quantity and collection rate before and after the implementation of airtight project(within six years after the implementation of airtight project),the average collection efficiency of landfill gas was 32 percentage points higher than the pre-implementation average collection rate.In practice,the implementation of airtight project in landfill can isolate the domestic waste body from the atmosphere and other external environments,reduce the amount of landfill gas diffusion to the outside world,and increase the amount of gas collected in the landfill gas pipeline network,and then improve the efficiency of landfill gas collection.