渗滤液流失造成的MSW填埋气潜能减量

中国城市生活垃圾(MSW)中易生物降解的有机质能产生大量可造成有机污染的渗滤液,这些渗滤液的流失对填埋垃圾的产气能力会产生不利影响,为了确定损失的这部分渗滤液的产气能力,对模拟填埋100 d的处于酸化阶段的渗滤液实施了70d的厌氧消化试验.试验过程中对渗滤液的产气量、甲烷含量、产沼气潜能、pH变化规律及COD去除率做了监测研究.结果表明,渗滤液沼气累积产量为34.55 ml/ml,甲烷浓度为65.0%,渗滤液产甲烷潜能为22.46 ml/g;pH值在开始两天下降至6.7,并在产气阶段逐渐上升到8.3;渗滤液的COD去除率为83.8%.基于对模拟填埋渗滤液的沼气潜能研究,一个开始填埋100d后的中国MSW填埋场流失的填埋气潜能已达到11.5%.

The reduction of the MSW landfill gas production potential by leachate emissions

The biodecayable bioorganic matter,which is contained in Chinese MSW,leads to a high amount of organically polluted leachate which has a negative impact on the biogas production capacity of the landfill waste.In order to quantify these losses of the biogas production capacity,the simulation experiment on the leachte from a 100 days landfill during the acidification phase was carried out ac-cording to a 70 days standard procedure.The biogas production from the leachte,the CH4 content,the biogas production po...