Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 18, 2024 - October 20, 2024
In municipal waste final disposal sites, gas venting pipes are installed to release gases such as carbon dioxide and methane generated in the landfill into the atmosphere. Though each flow of air, water or produced gas in the final disposal site including the gas venting pipes has been shown schematically, there is no research which quantitatively confirmed these flow characteristics. In addition, the authors have been continuously investigating the cesium-137 concentration in leachate from several disposal sites in Fukushima Prefecture. In this process, it was considered that, since the area around the gas venting pipes is structurally more susceptible to rainwater flow than the waste layer, when radioactive cesium exists near the area around the gas venting pipes, it is strongly affected by rainwater, resulting in a high concentration in the leachate. Therefore, the flow of rainwater permeating in the final disposal site was analyzed by simply simulating the gas venting pipe and leachate collection/discharge pipe, and flow characteristics were clarified.
