Acroni, Cesta Borisa Kidrica 44, Jesenice, Slovenia.
Waste Manag. 2010 Jan;30(1):110-8. doi: 10.1016/j.wasman.2009.09.010. Epub 2009 Sep 30.
Recirculation of leachate on a covered landfill site planted with willows or other highly evapotranspirative woody plants is an inexpensive option for leachate management. In our study, a closed landfill leachate recirculation system was established on a rehabilitated municipal solid waste landfill site with planted landfill cover. The main objective of the study was to evaluate the sustainability of the system with regard to high hydraulic loads of the landfill leachate on the landfill cover and high concentrations of saline ions, especially potassium (K(+)), sodium (Na(+)) and chloride (Cl(-)), in leachate. The results of intensive monitoring, implemented during May 2004 and September 2007, including leachate, soil and plant samples, showed a high sustainability of the system regarding saline ions with the precipitation regime of the studied region. Saline ion concentrations in leachates varied between 132 and 2592mg Cl(-) L(-1), 69 and 1310mg Na(+) L(-1) and between 66 and 2156mg K(+) L(-1), with mean values of 1010, 632 and 686mg L(-1), respectively. Soil salinity, measured as soil electrical conductivity (EC), remained between 0.17 and 0.38mS cm(-1) at a depth between 0 and 90cm. An average annual precipitation of 1000mm provided sufficient leaching of saline ions, loaded by irrigation with landfill leachate, from the soil of the landfill cover and thus prevented possible salinity shocks to the planted willows.
在覆盖式垃圾填埋场中，对沥滤液进行再循环利用，种植柳树或其他高蒸腾木质植物，是沥滤液管理的一种廉价选择。在我们的研究中，在一个已修复的城市固体废物填埋场，采用种植封场覆盖的方式，建立了一个封闭式垃圾填埋场沥滤液再循环系统。该研究的主要目的是评估在高水力负荷条件下，特别是在沥滤液中高浓度的盐离子（特别是钾（K(+))、钠（Na(+))和氯（Cl(-))）对封场覆盖的影响下，该系统的可持续性。在 2004 年 5 月至 2007 年 9 月期间，通过对包括沥滤液、土壤和植物样本在内的密集监测，结果表明，该系统对研究区域的降水模式具有较高的耐盐性。沥滤液中的盐离子浓度在 132 至 2592mg Cl(-) L(-1)、69 至 1310mg Na(+) L(-1)和 66 至 2156mg K(+) L(-1)之间变化，平均值分别为 1010、632 和 686mg L(-1)。土壤电导率（EC）作为土壤盐分进行测量，在 0 至 90cm 深度范围内保持在 0.17 至 0.38mS cm(-1)之间。年平均降水量为 1000mm，足以通过用垃圾沥滤液进行灌溉，将负载的盐离子从封场覆盖的土壤中淋洗出来，从而防止盐分对种植的柳树造成冲击。
