固体废弃物填埋场产气率的估算

AN ESTIMATION ON GAS GENERATION OF MUNICIPAL SOLID WASTE LANDFILL

填埋气体的产生过程可分为需氧分解、需氧 /酸性分解、向厌氧分解过渡、厌氧分解和稳定阶段 5个。填埋场产气率的估算是填埋场气体收集和控制系统设计的重要环节。本文对填埋场气体和集气井产气量的估算方法进行研究。给出了 2种较简单的填埋场气体量的估算方法。并用该方法对一个三角形布置的集气井的产气量进行了估算。结果表明 ,这

A municipal solid waste (MSW) landfill can generate tremendous quantities of gas and leachate during its decomposition. It can be looked as a biochemical reactor. Material in the landfill includes partially biodegraded organic material and the other inorganic waste materials originally placed in the landfill. Gas generation phases in MSW landfill can be divided into five parts. They are aerobic, aerobic/acid generation, transition to anaerobic, anaerobic, and transition to stabilization. The estimation of the rate of landfill gas generation is most important for designing landfill gas collection and control system. In the present paper the method that estimate the gas generation in the landfill is studied. Two simple modeling equations that can be used to estimate the gas generation rate of landfill and gas extraction well are presented in the paper. A calculation example of the gas extraction well is given with one of the method. The results show that the two equations is applicable for the estamition of the gas generation rate of the landfill.