项目名称: 我国城市固体废弃物填埋场中温度场分布及演化机理的研究
项目编号: No.51508504
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 建筑环境与结构工程学科
项目作者: 徐文杰
作者单位: 浙江大学
项目金额: 20万元
中文摘要: 目前我国城市固体废弃物处置方式以填埋为主,填埋场工程特性复杂,面临着滑坡失稳;渗沥液污染地下水土;填埋气污染大气,引发火灾等环境灾害问题。填埋场堆体中存在着以生化反应为核心的固-液-气-热-化-生耦合过程,其中生化反应受温度变化的影响十分显著,从而对渗沥液和填埋气释放、骨架变形以及污染物运移产生影响。为了能更进一步认识该问题,本项目将围绕关键问题“我国城市固体废弃物填埋场中温度场分布及变化的机理”,开展以下几方面的研究:(1)生化降解过程中热量释放速率;(2)城市固体废弃物的比热容和导热系数测定及其随降解过程的变化规律;(3)城市固体废弃物填埋体中考虑热量传导的耦合作用机理,及其理论模型建立和计算程序的开发。本项目将为认识城市固废填埋场中温度的分布及变化问题提供理论支持。
中文关键词: 城市固体废弃物填埋场;温度分布;多场相互作用;数值模拟
英文摘要: Landfilling is the main method of the municipal solid waste (MSW) disposal in China. Landfills have complicated engineering properties and high potential of environmental hazard, e.g. slop slide; leachate release caused contamination of soil and ground water; landfill gas release caused atmospheric pollution and explosion. Multi-field processes take place in landfill. Among them the biochemical degradation process of MSW is the most important and it is significantly affected by temperature. Then processes of leachate and landfill gas release, deformation and solute mass transport will be influenced. In order to investigate the key problem of “the temperature distribution and evolution in landfill”, following researches will be carried out: (1) heat release rate during the biochemical degradation; (2) thermal properties evolution with the degradation process; (3) theory and numerical model development of coupled multi-field processes. This project will provides theoretical basis of the temperature distribution and evolution problem in landfills in China.
英文关键词: municipal solid waste landfill;temperature distribution;multi-field processes;numerical modeling