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Life-Cycle Inventory and Impact Evaluation of Mining Municipal Solid Waste Landfills

机译：采矿生活垃圾填埋场的生命周期清单和影响评估

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摘要

Recent research and policy directives have emerged with a focus on sustainable management of waste materials, and the mining of old landfills represents an opportunity to meet sustainability goals by reducing the release of liquid- and gas-phase contaminants into the environment, recovering land for more productive use, and recovering energy from the landfilled materials. The emissions associated with the landfill mining process (waste excavation, screening, and on-site transportation) were inventoried on the basis of diesel fuel consumption data from two full-scale mining projects (1.3-1.5 L/in-place m~3 of landfill space mined) and unit emissions (mass per liter of diesel consumption) from heavy equipment typically deployed for mining landfills. An analytical framework was developed and used in an assessment of the life-cycle environmental impacts of a few end-use management options for materials deposited and mined from an unlined landfill. The results showed that substantial greenhouse gas emission reductions can be realized in both the waste relocation and materials and energy recovery scenarios compared to a "do nothing" case. The recovery of metal components from landfilled waste was found to have the greatest benefit across nearly all impact categories evaluated, while emissions associated with heavy equipment to mine the waste itself were found to be negligible compared to the benefits that mining provided.
机译：最近出现了针对废物可持续管理的研究和政策指令，对旧垃圾填埋场的开采为通过减少液相和气相污染物向环境中的释放，回收土地以实现更多目标而实现可持续性目标提供了机会。生产性使用，并从垃圾填埋场中回收能量。根据两个大型采矿项目的柴油消耗量数据（1.3-1.5 L / m〜3的原地m〜3），对与垃圾填埋场采矿过程（废物挖掘，筛选和现场运输）相关的排放进行了盘点。通常用于采矿填埋场的重型设备产生的单位面积排放量和单位排放量（每升柴油消耗量的质量）。开发了一个分析框架，并将其用于评估从无衬砌垃圾填埋场开采和开采的材料的几种最终用途管理选项对生命周期的环境影响。结果表明，与“不采取任何行动”情况相比，在废物迁移，材料和能源回收方面都可以实现大幅度的温室气体减排。在几乎所有评估的影响类别中，发现从填埋的废物中回收金属成分的收益最大，而与采矿所带来的收益相比，与开采废物本身的重型设备相关的排放却可以忽略不计。

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  • 来源
    《Environmental Science & Technology》 |2014年第5期|2920-2927|共8页
  • 作者

    Pradeep Jain; Jon T. Powell; Justin L. Smith; Timothy G. Townsend; Thabet Tolaymat;

  • 作者单位

    Innovative Waste Consulting Services, LLC, 6628 Northwest 9th Boulevard, Suite 3, Gainesville, Florida 32605, United States;

    Innovative Waste Consulting Services, LLC, 6628 Northwest 9th Boulevard, Suite 3, Gainesville, Florida 32605, United States;

    Innovative Waste Consulting Services, LLC, 6628 Northwest 9th Boulevard, Suite 3, Gainesville, Florida 32605, United States;

    Department of Environmental Engineering Sciences, University of Florida, Box 116450, Gainesville, Florida 32611-6450, United States;

    National Risk Management Research Laboratory, United States Environmental Protection Agency (U.S. EPA), 26 West Martin Luther King Street, Cincinnati, Ohio 45268, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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