准好氧和厌氧填埋陈腐垃圾的稳定化特性

比较了5a填埋龄准好氧和厌氧填埋体陈腐垃圾的挥发性固体（VS）、有机碳（TOC）和腐殖质等降解及稳定化指标。结果表明，陈腐垃圾中VS和TOC含量较新鲜垃圾显著降低，准好氧填埋体陈腐垃圾的VS和TOC含量低于厌氧填埋体1％～2％，但差异不显著；准好氧填埋体的表面沉降量显著高于厌氧填埋体（P〈0．05），存在一定的负相关关系。渗滤液和清水回灌引起陈腐垃圾VS含量的差异不明显，但造成了填埋体表面明显的不均匀沉降。准好氧填埋体陈腐垃圾的BDM值与厌氧填埋体相近，且随距离导气管距离和填埋深度的增加逐渐升高，距离导气管距离越大，层间BDM值差异越大。此外，准好氧和厌氧填埋体陈腐垃圾的腐殖质提取率与HA／FA差异不明显。

Stabilization Properties of Aged refuse in Semi aerobic and Anaerobic Landfills

The stabilization properties of aged-refuse in five-year-old semi-aerobic and anaerobic landfills were compared, such as volatile solid （VS）, total organic carbon content （TOC）, humic matters, and so on. It was found that VS and TOC content in aged-refuse were obviously lower than those in fresh refuse after five years disposal. However, the VS and TOC content of aged-refuse in semi-aerobic landfill were slightly lower than anaerobic ones, whilst the difference was not significant. Surface settlements of semi- aerobic landfills were higher than that of anaerobic ones （P〈0. 05）. Moreover, there was negative correlation between VS content and surface settlements. Both leachate and water recycling methods did not lead to significant VS content difference, while leachate recycling would cause obviously uneven surface settlement. Biological degradable materials （BDM） value of aged-refuse in semi-aerobic landfill and anaerobic one was similar. Furthermore, BDM value increased with the increase of air pipe distance and depth. The greater the air pipe distance is, the bigger the difference of BDM value between the layers is. In addition, total extraction ratios of humic matters and HA/FA in semi-aerobic and anaerobic landfill agedrefuse had no significant differences.