Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
Environ Int. 2019 Jun;127:387-394. doi: 10.1016/j.envint.2019.03.052. Epub 2019 Apr 4.
Landfilling biodegradable waste is an important source of global greenhouse gas (GHG) emissions. Among the several types of landfill, limited-controlled landfill is a common method used to dispose of domestic solid waste, especially in developing countries. However, information about GHG emissions from limited-controlled landfill sites has rarely been reported. In this study, the GHG emissions from a typical limited-controlled landfill site were investigated under a regular period for one year. The number and positions of static chambers were arranged according to the guidance on Monitoring Landfill Gas Surface Emissions by the UK Environment Agency to obtain representative data from the heterogeneous surface of the landfill. Inverse distance weighting (IDW) was applied to evaluate and visualise the GHG emissions from the whole landfill surface based on the measurements of distributed static chambers. As an important GHG source of the landfill site, the emissions from the landfill leachate treatment plant were also measured. The results revealed that CH and NO emission fluxes from the landfill area were 1324.73 ± 2005.17 mg C m d and 2.16 ± 2.33 mg N m d, respectively, and the fluxes from the leachate treatment plants were 23.92 ± 29.20 mg C m d and 16.40 ± 16.89 mg N m d, respectively. CH and NO releases preferred to present spatial heterogeneity, while temporal heterogeneity was expected to exist in CH and CO emissions. The annual GHG emissions from the limited-controlled landfill was calculated to be 1.078 Gg CO-eq yr, which was the least among all types of landfill sites. In addition, the GHG emission factor was 0.042 t CO-eq t waste yr which could not be ignored compared to the sanitary landfills. Therefore, it is advisable to give more attention and determine a potential solution for reducing GHG emissions from limited-controlled landfill sites.
填埋场是温室气体（GHG）排放的重要来源之一。在几种类型的垃圾填埋场中，有限控制的填埋场是一种常见的方法，用于处理城市固体废物，特别是在发展中国家。然而，有关有限控制的垃圾填埋场温室气体排放的信息很少被报道。在这项研究中，对一个典型的有限控制的垃圾填埋场进行了为期一年的定期调查。静态室的数量和位置根据英国环境署的《监测垃圾填埋气表面排放指南》进行安排，以从垃圾填埋场的非均匀表面获得有代表性的数据。逆距离加权（IDW）用于根据分布式静态室的测量值评估和可视化整个垃圾填埋场表面的温室气体排放。作为垃圾填埋场的一个重要温室气体源，还测量了垃圾渗滤液处理厂的排放。结果表明，垃圾填埋区的 CH 和 NO 排放通量分别为 1324.73±2005.17 mg C m d 和 2.16±2.33 mg N m d，渗滤液处理厂的排放通量分别为 23.92±29.20 mg C m d 和 16.40±16.89 mg N m d。CH 和 NO 的释放倾向于表现出空间异质性，而 CH 和 CO 的排放则可能存在时间异质性。有限控制的垃圾填埋场的年温室气体排放量估计为 1.078 Gg CO-eq yr，在所有类型的垃圾填埋场中是最少的。此外，与卫生填埋场相比，GHG 排放因子为 0.042 t CO-eq t 废物 yr，这一点不容忽视。因此，建议更多地关注并确定减少有限控制的垃圾填埋场温室气体排放的潜在解决方案。
