佛山市垃圾填埋场地下废气组成与产量研究

在佛山市五峰山垃圾卫生填埋场安装地下废气监测井，对地下废气的组成与性质进行监测，在位于较迟填埋垃圾区域的监测井内，地下废气ＣＨ４、ＣＯ２的浓度较高，较稳定，在位于较早填埋垃圾区域的监测井内，地上废气ＣＨ４、ＣＯ２的浓度较低，变化也较大，且在最后一次监测中，井内的废气已失去了垃圾填埋场废气的特征，说明地下垃圾的厌氧分解过程已经完成或者厌氧环境已被破坏，前后只约持续了４ａ的时间，远低于预期所需的１０－

Investigation of the Landfill Gas Composition and Its Yield in South China

Five landfill gas monitoring wells were installed and the composition of landfill gases were monitored in Wufengshan landfill in Foshan,south China. For the wells located in the late landfilled region,CH 4 and CO 2concentrations of landfill gases are high and stable.For the wells located in the early landfilled region,CH 4 and CO 2 concentrations of landfill gases are low and variable.In the last field measurement,the gases in the well located in early landfilled region has lost the characters or landfill gas. It's implication is that the biological decomposition process of the refuse underground has completed or the anaerobic environment has been destroyed.It just lasted for about 4 years and is much shorter than the expected time of 10-20 years. The differences of landfill gas between Foshan Wufengshan landfill and Hong Kong Shuen Wan landfill were compared and discussed. The yield of landfill gas in Wufengshan landfill was estimated according to the original carbon component of the refuse.