JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-GE 地質環境・土壌環境

[A-GE40] [EE] エネルギ・環境・水ネクサスと持続的発展

2017年5月22日(月) 10:45 〜 12:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:張 銘(産業技術総合研究所地質調査総合センター地圏資源環境研究部門)、薛 強(中国科学院武漢岩土力学研究所)、温 志超(国立曇林科技大学)、川本 健(埼玉大学大学院理工学研究科)

[AGE40-P13] The simulation of the oxygen transport with injection well operation in landfill

*Liu Lei1Tian Yu2Dong Yi3Xue Qiang1 (1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences、2.Wuhan Environment Investment & Development Co., Ltd.、3.Henan BCCY New Power Industry Co., Ltd.)

キーワード:preferential flow, modeling, oxygen transport, landfill

Evaluation of oxygen distribution during aeration in landfill was very important to determine the design parameters of injection well. The coupling model described gas preferential transport in landfill was developed, which linked the effect of advection-diffusion and oxidation reaction and mass exchange between the fracture and matrix system. Combined with the typical cases in field site, the quantitative simulation of the variation of gases distribution during vertical well aeration in short term was presented. The sensitivity of the parameters in the coupling model to gas transport was addressed. The simulation result shown that the oxygen and methane concentration during aeration was represented by using the dual advective-diffusive model (DAD model). The aeration radius achieved by DAD model was closer to the measurement value. It was underestimated by single advective-diffusive model (SAD model). The mass transfer volume between the fracture and matrix system greatly contributes to gas preferential flow effect in landfill. The aeration radius (AR) was obviously influenced by the diffusion coefficient. It will provided evidence for optimum design of gas injection well in aerobic landfill.