Methane Emission Estimates from Landfills Obtained with Dynamic Plume Measurements
Methane Emission Estimates from Landfills Obtained with Dynamic Plume Measurements
复制标题
通过动态羽流测量获得垃圾填埋场的甲烷排放估算
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
H. Scharff
中科院分区：
文献类型：
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作者：
A. Hensen;H. Scharff
使用移动可调谐半导体激光系统（TDL）估计了荷兰3个不同垃圾填埋场的甲烷排放量。在垂直于风向的横截面上，在源的下风处测量烟羽横截面中的甲烷浓度。用高斯烟羽模式模拟了样带的浓度水平。排放源的排放量是根据测量和模拟的浓度水平计算的。烟羽扩散模型的校准是使用从垃圾填埋场释放的示踪剂（N2 O）进行的，并用TDL系统进行了准确的测量。不同地点的排放量估计值为3.6至16立方米/公顷/小时。排放水平进行了比较排放量估计的基础上，填埋场气体生产模型。这种比较表明，春天的氧化率高达50%，而11月的氧化率可以忽略不计。在三个地点中的一个，连续3年在生物标志物中进行测量。第一年和第二年的排放水平比较表明，由于实施了气体提取系统，甲烷排放量减少了约50%。从第二年到第三年，由于新的填埋，排放量增加了4倍。此外，在冬季氧化效率降低时进行了测量.本文介绍了所使用的测量技术，并讨论了所进行的实验会话的结果。
Methane emissions from 3 different landfills inthe Netherlands were estimated using a mobileTuneable Diode Laser system (TDL). The methaneconcentration in the cross section of the plumeis measured downwind of the source on a transectperpendicular to the wind direction. A gaussianplume model was used to simulate theconcentration levels at the transect. Theemission from the source is calculated from themeasured and modelled concentration levels.Calibration of the plume dispersion model isdone using a tracer (N2O) that is releasedfrom the landfill and measured simultaneouslywith the TDL system. The emission estimates forthe different locations ranged from 3.6 to 16 m3 ha-1 hr-1 for the differentsites. The emission levels were compared toemission estimates based on the landfill gasproduction models. This comparison suggestsoxidation rates that are up to 50% in springand negligible in November. At one of the threesites measurements were performed in campaignsin 3 consecutive years. Comparison of theemission levels in the first and second yearshowed a reduction of the methane emission ofabout 50% due to implementation of a gasextraction system. From the second to the thirdyear emissions increased by a factor of 4 due tonew landfilling. Furthermore measurements wereperformed in winter when oxidation efficiencywas reduced. This paper describes themeasurement technique used, and discusses theresults of the experimental sessions that were performed.