【摘要】 对试验场渗滤液COD质量浓度进行长达 3 .5年的测定 (1～ 2周测定一次 ) ,建立了填埋场渗滤液COD质量浓度随时间变化的数学模型 ,并通过模型预测了渗滤液COD质量浓度通过自然衰减达到不同排放标准所需时间 ,同时提出填埋场的规划和设计可以由传统的渗滤液及时外排处理式转变为不及时外排 ,使其在填埋场内COD质量浓度大幅度自然衰减后抽出处理 ,这样可以大量节省费用 ,简化操作工艺更多还原

【Abstract】 In this work, the COD values of leachate in a large-scale testing landfill were analysed for every one to two weeks lasting for 3.5 years. A mathematical model was established to simulate the relationship between the COD values and the time. It was found that COD value would the reduced to 300 mg·L -1 after 10 years and to 100 mg·L -1 after 15 years. These results mean that the leachate may be kept at the landfill for years until the concentrations were reduced naturally to some level or to the accepted level before being discharged. If the current landfilling design and operating processes were modified, from discharging leachate promptly to discharging leachate after some time, so as to make COD concentrations decrease naturally to some level, we could economize manpower and material greatly and simplify operating processes.更多还原