垃圾填埋场稳定化研究（Ⅰ）

STABILIZATION OF LANDFILL(Ⅰ)

通过填埋场的实验室规模的模拟实验，研究了负温和低温条件下城市生活垃圾的降解行为。经８个月的阵解，发现含水率、污泥的加入以及高温均有利于位圾降解。菜类垃圾的降解率为５０％以上：而含水率为６０％的混合垃圾，降解率为２０％以下。测定了单位垃圾产生的气体和浸取液量以及浸取液的化学耗氧量、含水率和无机残渣。讨论了本工作在寒区填埋场工艺设计的实践意义。

The degradation of refuse in laboratory scale lysimeters with low and negative telnperature was studied.The refl1se of various composition was put into 12 cylinders with a volulne of 32(diatmeter)x60(height)cin,and was decornposited for 8 months at 0-14℃(6 cyIinders)and-14-0℃(another 6 cylinders),respectively.The leachate generated durimg degradation was kept in the cvlinders and measured after the experiments were completed. The volutne of gas was determined by water displacetnent method.It was found that higher temperature,water content and ad-dition of sludge was favorable to the degradation of refuse,tested.For vegetdble refuse with 92%water content,about 50%can be decomposed wble less than 20% was found to be degraded for mized refuse with 60%water content,The water and inorganic residues content in leachate was accurately determined with DSC and TGA respectively, and the engineering significance of this work was discussed.