Surface spraying, horizontal trenches, and vertical wells are the most common leachate recirculation system used at landfills in engineering practice. In order to quantify the efficiency of the three aforementioned recirculation systems, a hydro–biochem–mechanical-coupled model was developed in the present work, which can describe hydrodynamic and biochemical behaviors in food-waste-rich landfills. A typical landfill cell was modeled in COMSOL. The results indicate that leachate recirculation can accelerate the decomposition of municipal solid waste (MSW) with food-rich waste content, relieving acidification, improving gas generation efficiency, and consequently, increasing the early settlement in landfills.

中文翻译：

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高餐厨垃圾生物反应器垃圾填埋场渗滤液再循环数值模型

表面喷淋、水平沟渠和垂直井是工程实践中垃圾填埋场最常见的渗滤液再循环系统。为了量化上述三个再循环系统的效率，在目前的工作中开发了一个水-生化-机械耦合模型，该模型可以描述富含食物垃圾的垃圾填埋场的流体动力学和生化行为。在 COMSOL 中对典型的垃圾填埋场进行建模。结果表明，渗滤液再循环可以加速含有丰富食物垃圾的城市固体废物 (MSW) 的分解，缓解酸化，提高气体产生效率，从而增加垃圾填埋场的早期沉降。