Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing, China.
Waste Manag Res. 2012 Mar;30(3):255-65. doi: 10.1177/0734242X11413328. Epub 2011 Sep 18.
To investigate the influence of semi-aerobic and anaerobic landfill operation on stabilization processes of landfill sites with leachate recirculation, in situ simulated semi-aerobic landfill sites with leachate recirculation (SLR) and anaerobic landfill sites with leachate recirculation (ALR) were constructed. Refuse properties and landfill settlement were determined. Leachate quality and landfill gas compositions were monitored regularly. Based on the data obtained, leachate quality, landfill gas and final refuse characteristics were adopted as assessment factors to quantitatively evaluate stabilization of landfill sites. The results showed that volatile solids (VS), total organic carbon (TOC) and biologically degradable matter (BDM) of aged refuse in SLR (15.8, 7.3 and 9.9%, respectively) were lower than those in ALR, which were 19.1, 9.2 and 11.3%, respectively. Settlement and reduction ratio of SLR were 1.71 m and 30.91%, respectively, and 1.40 m and 25.45% in the case of ALR. Concentrations of organic pollutants, especially ammonia, were reduced in SLR, and variation in leachate quality was also smoother than ALR. Throughout the experiment the average concentration of CH4 in ALR was higher than that in SLR (36.7 and 14.5%, respectively). At the end of the experiment, SLR was moderately stable, while ALR was moderately unstable. The comprehensive assessment index (I) for SLR and ALR was 200 and 355, respectively.
为了研究渗滤液回灌对半好氧和厌氧填埋场稳定化过程的影响，构建了原位模拟渗滤液回灌半好氧填埋场（SLR）和渗滤液回灌厌氧填埋场（ALR）。测定了垃圾特性和填埋沉降。定期监测渗滤液质量和填埋气组成。根据获得的数据，采用渗滤液质量、填埋气和最终垃圾特性作为评估因素，对填埋场的稳定化进行定量评价。结果表明，SLR 中老化垃圾的挥发性固体（VS）、总有机碳（TOC）和可生物降解物质（BDM）分别为 15.8%、7.3%和 9.9%，低于 ALR 中的 19.1%、9.2%和 11.3%。SLR 的沉降和减少率分别为 1.71m 和 30.91%，ALR 的沉降和减少率分别为 1.40m 和 25.45%。SLR 中有机污染物浓度，特别是氨，有所降低，渗滤液质量的变化也比 ALR 更平稳。在整个实验过程中，ALR 中的 CH4 平均浓度高于 SLR（分别为 36.7%和 14.5%）。实验结束时，SLR 处于中等稳定状态，而 ALR 处于中等不稳定状态。SLR 和 ALR 的综合评估指数（I）分别为 200 和 355。
