To overcome the weaknesses of traditional landfills, a modified aerobic landfill concept with intermediate covers of coarse material between waste layers functioning as facilities of drainage and aeration has been proposed recently. In this study, a one-dimensional coupled model, including aerobic biodegradation, oxygen diffusion, and advection, is proposed to describe oxygen distribution in this new type of landfill. Homotopy analysis method and perturbation method are applied to solve this model at passive aeration and active aeration, respectively. The model has six input variables, that is, oxygen diffusion coefficient, gas permeability, maximum oxygen consumption rate, layer thickness of waste, and injection pressure and extraction pressure. A combination of their typical values gives rise to over 700,000 scenarios which can be calculated by the proposed solution. The coupled effect of the above variables on oxygen migration is quantitatively investigated, followed by an estimation formula of the minimum oxygen concentration in waste layer. The maximum waste layer thickness is defined as a function of other variables for a given aeration target of oxygen volume concentration larger than 5%. A generalized design method of waste layer thickness, injection pressure, and extraction pressure is then developed for the newly proposed modified layered aerobic landfill, which can promote its popularization and application.

中文翻译：

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一种改进的分层好氧垃圾填埋场除以粗料的设计方法。

为了克服传统垃圾填埋场的弱点，最近提出了一种改进的需氧垃圾填埋场概念，在废物层之间具有中间的粗糙材料覆盖层，用作排水和曝气设施。在这项研究中，提出了一个包含有氧生物降解，氧气扩散和对流的一维耦合模型来描述这种新型垃圾填埋场中的氧气分布。应用同伦分析法和摄动法分别求解了被动曝气和主动曝气的模型。该模型有六个输入变量，即氧扩散系数，气体渗透率，最大耗氧率，废物层厚度以及注入压力和提取压力。将其典型值组合起来可得出700多种，可以通过建议的解决方案计算出000个方案。定量研究了上述变量对氧气迁移的耦合效应，然后给出了废物层中最小氧气浓度的估算公式。对于给定的氧气体积浓度大于5％的曝气目标，最大废物层厚度定义为其他变量的函数。然后针对新提出的改性分层好氧垃圾填埋场，开发了一种废物层厚度，注入压力和提取压力的通用设计方法，可以促进其推广应用。对于给定的氧气体积浓度大于5％的曝气目标，最大废物层厚度定义为其他变量的函数。然后针对新提出的改性分层好氧垃圾填埋场，开发了一种废物层厚度，注入压力和提取压力的通用设计方法，可以促进其推广应用。对于给定的氧气体积浓度大于5％的曝气目标，最大废物层厚度定义为其他变量的函数。然后针对新提出的改性分层好氧垃圾填埋场，开发了一种废物层厚度，注入压力和提取压力的通用设计方法，可以促进其推广应用。