城市生活垃圾填埋产沼的模拟实验

Experimental Simulation of Production Gas in Land fill of MSW

通过城市生活垃圾的填埋降解模拟实验,研究了不同温度、不同垃圾成份对垃圾降解及填埋气产生过程的影响。实验结果表明:增加温度及在填埋垃圾中添加污泥,可加快填埋垃圾的降解与填埋气的产生,实验期间累计产气量分别比对照组提高2.04和3.4倍;以厨余垃圾为主的样品垃圾,其产气过程的显著特征是产气速率衰减较快,这与国外文献报道有较大差异。对我国城市生活垃圾,填埋封场后产气量的快速衰减,是填埋气利用规划设计应该考虑的问题。

Waste decomposition and landfill gas generation process under different composition and temperature conditions was investigated by a la ndfill lysimeter of municipal solid waste. The experimental results show that hi gh er temperature and wastewater sludge addition to MSW can accelerate organic wast es decomposition and landfill gas production. In the experimental period, accumula tion gas production is 2.04 and 3.4 times of the control group. The gas production r ate of kitchen waste declines rapidly which is quite different from that report ed by abroad researchers. So the rapid decline of gas production after landfill closure will give a deep effect on LFG recovery practice.