非规范生活垃圾填埋场填埋气横向迁移规律及控制

我国城市中尚有大量非规范生活垃圾填埋场存在,对其进行污染整治消除填埋气导致的环境安全隐患刻不容缓.以重庆某垃圾填埋场为例,研究重庆市主城区的非规范生活垃圾填埋场填埋气的横向迁移问题,在垃圾场周边区域布设36个监测井,对监测井中的填埋气进行分析监测,以填埋气特征组分CH4气体的体积浓度变化研究填埋气的横向迁移规律.结果表明,监测井到填埋场边界的距离为监测井中CH4气体浓度的主要影响因素;垃圾场周边距离填埋场场界50 m以外的区域,填埋气的横向迁移已经相当微弱;但是距离填埋场边界50 m以内区域的填埋气的横向迁移明显,需要在距离填埋场边界50 m范围内采取措施与场内填埋气的导排措施配合,进行填埋气的污染控制.

Horizontal migration rule and control measures of landfill gas arising from non-sanitary municipal solid waste landfill

There are still a great number of non-sanitary municipal solid waste landfills in the cities of China. There is no time to delay to control the environmental pollution and to remove the hidden environmental safety troubles caused by those landfills. This paper focuses on the horizontal migration of landfill gas, exemplified by a certain non-sanitary landfill in Chongqing. Around the landfill plant, 36 monitoring bores are laid out regularly to monitor the landfill gas concentration within the bores. For CH4 is a characteristic component of landfill gas and represents the main part of landfill gas, it is used to study the horizontal migration rule of landfill gas. The results show that the distance to the site boundary is the principal influential factor of CH4 concentration in monitoring bores; there is very significant horizontal migration of landfill gas in the region with a distance to the site boundary less than 50 m, as a consequence, special measures should be adopted to control the horizontal migration of landfill gas in the region as well as within the landfill site as soon as possible.