实验研究甲氧化效率在三个配置的土壤填埋场覆盖通过土壤柱测试通过土壤柱测试
1Zijin School of Geology and Mining, Fuzhou University, Fuzhou City, Fujian Province, China; Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Natural Resources (Fujian Key Laboratory Of Geohazard Prevention), Fuzhou City, Fujian Province, China.
Waste management (New York, N.Y.)
|October 11, 2024
概括
三层填埋面覆盖实现了最高的甲氧化效率 (71%),这是由于优异的氧气供应. 其他盖子表现出不同的效率,性能受到干燥阶段和降雨事件的影响.
科学领域:
- 环境工程 环境工程
- 地质技术工程 地质技术工程
- 土壤科学 土壤科学
背景情况:
- 填埋场盖对于减轻甲排放至关重要.
- 了解土壤水气动力学是优化覆盖性能的关键.
- 蒸发透气 (ET) 盖,毛细血管屏障效应 (CCBE) 盖和三层盖是常见的垃圾填埋场盖设计.
研究的目的:
- 为了比较三个不同的垃圾填埋场盖设计的甲氧化效率.
- 调查干燥阶段和降雨对覆盖性能的影响.
- 分析土壤水气反应影响甲氧化.
主要方法:
- 进行了模拟填埋场覆盖条件的土壤柱测试.
- 评估了三种覆盖类型:单体ET覆盖,CCBE和三层覆盖.
- 在雨量隔开的两个干燥阶段测量了水气动力学.
主要成果:
- 三层覆盖表现出最高的甲氧化效率 (71%),其次是单质ET覆盖 (62%) 和CCBE (58%).
- 三层覆盖层中较高的氧气度,归因于其底部液压屏障,增强了甲氧化.
- 在第二个干燥阶段,由于含水量增加和氧气水平降低,甲氧化率降低了多达30%.
结论:
- 三层覆盖设计对甲氧化最有效.
- 土壤中的水含量和气体压力显著影响甲氧化效率.
- 垃圾填埋场覆盖的性能是动态的,并受到降雨等环境条件的影响.
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