Estimation of water movement in a closed landfill based on tracer tests in gas vents and changes in leachate quality

被引：6

作者：

Kim, H. J. ^{[1
]}

Endo, D. ^{[1
]}

Sato, M. ^{[1
]}

Matsuo, T. ^{[1
]}

Matsuto, T. ^{[1
]}

机构：

[1] Hokkaido Univ, Lab Solid Waste Disposal Engn, Grad Sch Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

来源：

WASTE MANAGEMENT | 2009年 / 29卷 / 08期

关键词：

VELOCITY; IMPACT;

D O I：

10.1016/j.wasman.2009.03.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Leachate accumulated at the Nakazono Landfill in Asahikawa, Japan due to an inadequate leachate collection and drainage system. To reduce the level of leachate in the landfill and promote the stabilization of waste, many passive gas vents were installed in addition to leachate collection vaults. This study evaluated the distribution and movement of leachate in the landfill by measuring leachate levels and conducting tracer tests in the gas vents. Water levels varied widely among gas vents and depended mainly on the vent's original ground level and depth. Leachate velocity varied greatly; it was high in the upper layers of the saturated zone in a gas vent, but this was only a superficial velocity caused by inflow from unsaturated layers. A sharp decrease in total organic carbon observed in most gas vents after installation was likely due to the effect of aerobic biodegradation in the unsaturated waste layer. This effect was limited to a small aerobic zone around the gas vent. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2308 / 2315

页数：8