长江流域资源与环境 >> 2005, Vol. 14 >> Issue (4): 516-521.

• 生态环境 • 上一篇    下一篇

垃圾填埋场覆盖层灌溉处理渗滤液的试验研究

张 斌,何品晶,邵立明,王如意   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-07-20
  • 通讯作者: 张 斌

EFFECTS OF THE RECIRCULATED LANDFILL LEACHATE BY IRRIGATION

ZHANG Bin, HE Pin-jing, SHAO Li-ming, WANG Ru-yi   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-20
  • Contact: ZHANG Bin

摘要: 在模拟的填埋场封场覆盖层上灌溉处理不同强度的渗滤液稀释液,研究其水量减量和主要污染物COD和NH3-N的去除效果。结果表明:一个生长季内,灌溉水量负荷12 mm/d条件下,裸土覆盖层的水量减量负荷均为7 mm/d左右,狗牙根覆盖层的水量减量负荷为7.7~11 mm/d,渗滤液原液灌溉处理时为7.7 mm/d;而灌溉渗滤液的强度从低到高,狗牙根生物量先增大后减小,狗牙根覆盖层的水量减量负荷与其生物量正相关;裸土覆盖层的COD去除率为65 %左右,NH3-N去除率为70 %~93 %;狗牙根覆盖层的COD去除率为68 %~93 %,NH3-N去除率为89 %~99 %; NH3-N的去除途径主要是转化为硝态氮和被植物吸收。渗滤液覆盖层灌溉处理有良好的水量减量和主要污染物去除效果,且有植被时效果更佳,表明填埋场封场覆盖层灌溉处理渗滤液是可行的。

关键词: 渗滤液, 灌溉处理, 水量减量, COD, 氨氮, 狗牙根

Abstract: The study was carried out on the volume reduction and main pollutants removal of recirculated landfill leachate with different diluted concentrations by irrigation on the soil planted with and without Cynodon dactyton. The results showed that during one field season, the average volume reduction rate of the recirculated landfill leachate by soil planted with Cynodon dactyton was 7.7~11 mm/d, and among it the undiluted leachte one was 7.7 mm/d, while 7 mm/d by soil without vegetation, and the former was correlated with the dry weight of the grass; the dry weight of the recirculated landfill leachateirrigated grass was larger than the tap waterirrigated one, and decreased with rising of leachate concentration; 89%~99% of NH3-N and 68%~93% of COD in the recirculated landfill leachate was removed by the soil with  Cynodon dactyton respectively, while 70%~93% of NH3-N and about 65% of COD by the soil without vegetation. NH\-3-N was removed mainly by conversion to NOx-N and vegetation intake.Recirculated landfill leachate irrigation benefits to its volume reduction and pollutants removal, especially on soil with Cynodon dactyton. The results show that it is feasible to irrigate the landfill closure system with recirculated landfill leachate in practice.

Key words: recirculated landfill leachate, irrigation treatment, volume reduction, NH3-N, COD, Cynodon dactyton

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