Design of horizontal trenches for leachate recirculation in bioreactor landfills using two-phase modelling
Design of horizontal trenches for leachate recirculation in bioreactor landfills using two-phase modelling
复制标题
DOI：
10.1504/ijewm.2015.069962
复制
发表时间：
2015-06
影响因子：
0.6
通讯作者：
K. Reddy;Rajiv K. Giri-;H. S. Kulkarni
中科院分区：
文献类型：
--
作者：
K. Reddy;Rajiv K. Giri-;H. S. Kulkarni
水平沟槽 (HT) 是渗滤液再循环系统 (LRS) 的最简单形式，通过沿着城市固体废物 (MSW) 填埋场的长度挖掘沟槽至所需的深度和长度来构建。 HT 的性能主要基于少量的实证研究。此外，以前的数学模型通常要么认为城市固体废物是饱和的而不是不饱和的，要么假设不正确的城市固体废物属性。因此，这些研究缺乏高效设计 HT 所需的准确性。在本研究中，进行了参数研究，以开发考虑到实际现场城市固体废弃物条件的高温处理设计图。与均质各向同性废物相比，非均质各向异性城市固体废弃物导致润湿宽度和面积增加，并且孔隙压力降低。提供归一化设计图，用于估计给定渗滤液注入速率、水力传导率以及来自 LRS 的 HT 尺寸和位置的稳态下的润湿宽度、润湿面积和孔隙水压力。
Horizontal trenches (HTs) are the simplest form of leachate recirculation systems (LRSs), constructed by excavating a trench to a desired depth and length along the length of a municipal solid waste (MSW) landfill. The performance of HTs is mainly based on few empirical studies. Moreover, previous mathematical models often either considered the MSW as saturated than unsaturated or assumed incorrect MSW properties. Hence, those studies lack the accuracy needed for the efficient design of HT. In this study, parametric studies are performed to develop design charts for HTs considering real field MSW conditions. Heterogeneous-anisotropic MSW resulted in an increase in wetted width and area and a decrease in the pore pressures developed than homogeneous-isotropic waste. Normalised design charts are provided to estimate wetted width, wetted area and pore water pressure at steady-state for a given leachate injection rate, hydraulic conductivity and the dimension and location of HT from a LRS.