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Characterization of solid waste in a bioreactor landfill using seismic borehole techniques.

机译:使用地震井眼技术表征生物反应器垃圾填埋场中的固体废物。

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摘要

Optimization of biodegradation in bioreactor landfills will allow for faster waste stabilization and enhanced methane production. A key parameter affecting the rate of biodegradation is moisture content. Currently there is no method to measure bulk moisture content within the landfill. This study evaluates the seismic tomography approach in order to map the seismic velocity distribution between two boreholes within a bioreactor landfill. Compressional wave velocity is dependant on a number of different factors including water content. A surface 5.4 kg hammer source proved more effective than a buffalo gun and a borehole hammer source. Compressional waves ranged from 300--500 m/s and shear waves ranged from 140-210 m/s, both having a velocity gradient increasing with depth. Seismic tomography was not as successful as anticipated. Data was noisy and difficult to pick. Difficulties with the seismic sources resulted in limited coverage. Wavelengths of generated waves result in near-field conditions making it difficult to note changes in waveform. The addition of 7000 m3 of water between the boreholes did not result in a detectable increase in compressional wave velocity. It was difficult to control the flow of water between the boreholes. Waste conditions may not have been in a saturation range sensitive to velocity changes.
机译:优化生物反应器垃圾填埋场中的生物降解将有助于更快地稳定废物并提高甲烷产量。影响生物降解速率的关键参数是水分含量。当前,没有方法可以测量垃圾填埋场中的总水分含量。这项研究评估了地震层析成像方法,以便绘制生物反应器垃圾填埋场中两个钻孔之间的地震速度分布图。压缩波速度取决于包括水含量在内的许多不同因素。事实证明,表面5.4 kg的锤击源比水牛枪和井下锤击源更有效。压缩波的范围为300--500 m / s,剪切波的范围为140-210 m / s,两者的速度梯度均随深度增加而增加。地震层析成像没有预期的成功。数据嘈杂且难以选择。地震源的困难导致覆盖范围有限。产生的波的波长导致近场条件,因此很难记录波形的变化。在井眼之间添加7000 m3的水并没有导致压缩波速度的可检测到的增加。很难控制井眼之间的水流。废物条件可能未处于对速度变化敏感的饱和范围内。

著录项

  • 作者

    Glancy, Taryn.;

  • 作者单位

    Carleton University (Canada).;

  • 授予单位 Carleton University (Canada).;
  • 学科 Engineering Civil.;Engineering Environmental.
  • 学位 M.A.Sc.
  • 年度 2009
  • 页码 125 p.
  • 总页数 125
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;环境污染及其防治;
  • 关键词

  • 入库时间 2022-08-17 11:38:25

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