Modeling of Leachate Recirculation Using Spraying–Vertical Well Systems in Bioreactor Landfills
Modeling of Leachate Recirculation Using Spraying–Vertical Well Systems in Bioreactor Landfills
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DOI：
10.1061/(asce)gm.1943-5622.0000887
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发表时间：
2017-07
影响因子：
3.7
通讯作者：
Shijin Feng;Ben-Yi Cao;H. Xie
中科院分区：
文献类型：
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作者：
Shijin Feng;Ben-Yi Cao;H. Xie
© 2017美国土木工程师协会。在城市固体废物（MSW）填埋场作为生物反应器运行的渗滤液再循环提供了显着的经济和环境效益。然而，竖井回灌可能不是一个有效的方法，因为重力会导致回灌的渗滤液直接向下流到填埋场底部的渗滤液收集系统，导致回灌渗滤液的浪费。减少渗滤液误用的解决方案之一是使用喷雾-VW组合系统使渗滤液沿水平方向流动，从而使其能够流过更多的城市固体废物。本研究的主要目的是研究联合喷洒-VW系统，分析同时应用喷洒和VW再循环系统对垃圾填埋场渗滤液迁移的影响，并估计一些关键设计参数（例如，稳态流速、影响半径和累积渗滤液体积）。此外，设计图表的工程应用建立了无量纲变量公式。所提出的设计图表证明是简单和有用的。
© 2017 American Society of Civil Engineers. Leachate recirculation in municipal solid waste (MSW) landfills operated as bioreactors offers significant economic and environmental benefits. However, vertical well (VW) recirculation may not be an effective method because gravity will cause the recirculated leachate to flow directly downward to the leachate collection systems at the bottom of the landfill, resulting in a waste of recirculated leachate. One of the solutions to minimize the misapplication of leachate is to enable the leachate to flow in horizontal directions using combined spraying-VW systems, thus enabling it to flow through more MSW. The key objectives of this study were to investigate combined spraying-VW systems, to analyze the effects of applying spraying and VW recirculation systems simultaneously on the leachate migration in landfills, and to estimate some key design parameters (e.g., the steady-state flow rate, the influence radius, and the cumulative leachate volume). In addition, design charts for engineering application were established using a dimensionless variable formulation. The proposed design charts prove both simple and useful.