Determination of gas recovery efficiency at two Danish landfills by performing downwind methane measurements and stable carbon isotopic analysis
Determination of gas recovery efficiency at two Danish landfills by performing downwind methane measurements and stable carbon isotopic analysis
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DOI：
10.1016/j.wasman.2017.11.049
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发表时间：
2018-03-01
期刊：
影响因子：
8.1
通讯作者：
Scheutz, Charlotte
中科院分区：
文献类型：
--
作者：
Aghdam, Ehsan F.;Fredenslund, Anders M.;Scheutz, Charlotte
在这项研究中，总甲烷（CH 4）的产生率和气体回收效率在两个丹麦垃圾填埋场进行了现场测量。这些垃圾填埋场相互靠近，并连接到同一个气体收集系统。示踪气体弥散法用于量化填埋场的CH 4排放量，而填埋场覆盖层的CH 4氧化效率是由稳定碳同位素技术确定的。总CH 4生成率估计的一阶衰减模型（Afvalzorg），并与总CH 4生成率确定的现场测量。两个垃圾填埋场的甲烷排放量总和为29.1至49.6千克甲烷/小时。甲烷氧化效率为6- 37%，平均为18%，相当于平均甲烷氧化率为8.1千克甲烷/小时。计算的气体回收效率为59- 76%，表明气体收集系统的优化具有很高的潜力。从一个垃圾填埋场的一个新的部分开始气体提取后，观察到更高的气体回收效率（73-76%）。通过实地测量确定的平均总CH 4生成率（147千克CH 4/小时）与通过Afvalzorg模型估计的生成率（154千克CH 4/小时）之间的一致性很好。(C)2017爱思唯尔有限公司版权所有。
In this study, the total methane (CH4) generation rate and gas recovery efficiency at two Danish landfills were determined by field measurements. The landfills are located close to each other and are connected to the same gas collection system. The tracer gas dispersion method was used for quantification of CH4 emissions from the landfills, while the CH4 oxidation efficiency in the landfill cover layers was determined by stable carbon isotopic technique. The total CH4 generation rate was estimated by a first order decay model (Afvalzorg) and was compared with the total CH4 generation rate determined by field measurements. CH4 emissions from the two landfills combined ranged from 29.1 to 49.6 kg CH4/h The CH4 oxidation efficiency was 6-37%, with an average of 18% corresponding to an average CH4 oxidation rate of 8.1 kg CH4/h. The calculated gas recovery efficiency was 59-76%, indicating a high potential for optimization of the gas collection system. Higher gas recovery efficiencies (73-76%) were observed after the commencement of gas extraction from a new section of one of the landfills. A good agreement was observed between the average total CH4 generation rates determined by field measurements (147 kg CH4/h) and those estimated by the Afvalzorg model (154 kg CH4/h). (C) 2017 Elsevier Ltd. All rights reserved.