水分运移对填埋垃圾降解过程的影响模拟研究  

Simulation of the Effects of Water Migration on Municipal Solid Waste Biodegradation Process in Landfill

作　　者：周效志[1] 桑树勋[1] 曹丽文[1] 刘会虎[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《土木建筑与环境工程》2013年第1期46-51,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(41072236);江苏省自然科学基金(BK2008133);江苏高校优势学科建设工程资助项目(2011-2013);中国矿业大学青年科研基金(2009A027)

摘　　要：模拟填埋实验对比研究了渗滤液定期排放、降雨入渗及渗滤液全量回灌对垃圾生物质降解过程的影响,探讨了生物气资源化填埋水分运移的调控措施。结果表明:渗滤液定期排放难以形成产甲烷菌适宜的Eh、pH及湿度条件,垃圾生物质降解表现为持续的水解产酸过程。降雨入渗对环境因子的调控作用微弱,且在入渗水持续冲刷下,CODCr累计净溶出量增加了67.8%。15±2℃下的渗滤液回灌使微生物代谢受到抑制,渗滤液累计产生量与CODCr累计净溶出量分别下降了70.9%与88.5%;反应温度升高至35±2℃,产甲烷菌适宜的环境条件快速形成,但也造成了NH4+-N的快速积累。减少地表水入渗量,合理控制渗滤液回灌温度,并在回灌前进行脱氮处理,可显著提高垃圾填埋处理的无害化与资源化水平。By operating an anaerobic degradation experiment of municipal solid waste landfill, the effects of periodic leachate emission, rainfall infiltration and full leachate recirculation on biodegradation process in landfill were investigated. And the control measures of water migration in biogas resources landfill were discussed. The results show that： in the case of leachate emission, it is difficult to form the suitable environmental factors of Eh, pH and humidity for methanogens. Rainfall infiltration plays a faint adjective function on microbiology environment. Under the continuous erosion action of infiltration rainfall, cumulative net CODer leaching load increases by 67. 8%. Leachate recirculation causes its cumulative production and net CODcr leaching load decreases by 70. 9% and 88. 5% respectively, which shows an obvious inhibited effect on microbial metabolism at 15 ±2℃. With the temperature increases to 35 ± 2℃, methanogens-suitable environment forms rapidly, but it causes the rapid accumulation of NH4＋- N in leachate. The measures, such as reducing the infiltration volume, controlling recirculation temperature reasonably and dealing with nitrogen removal before recirculation, can significantly improve the harmless and resources level of landfill disposal.

关 键 词：水分运移 填埋场 生活垃圾 渗滤液 回灌 

分 类 号：X705[环境科学与工程—环境工程]