常见垃圾填埋场最终覆盖系统的生命周期分析,重点关注碳中和性
Charles Wang Wai Ng1, Hongqi Chen1, Haowen Guo1
1Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Hong Kong, China.
The Science of the total environment
|November 29, 2023
概括
使用回收混凝土聚合物和生物炭的新型三层填埋面覆盖物大大降低了成本和碳排放. 这种可持续的解决方案提供了最高的碳捕获,促进了环境效益和经济优势.
科学领域:
- 环境工程 环境工程
- 废物管理 废物管理
- 生命周期评估 生命周期评估
背景情况:
- 全球关注垃圾填埋场建设和管理造成的碳排放.
- 生命周期分析 (LCA) 是评估基础设施对环境影响的常见工具,但很少用于填埋场最终覆盖系统.
- 现有的垃圾填埋场覆盖系统具有不同的环境足迹.
研究的目的:
- 对各种垃圾填埋场最终覆盖系统进行生命周期分析 (LCA).
- 评估环境影响,包括成本,碳排放和碳封存.
- 确定最可持续和最具成本效益的填埋场覆盖解决方案.
主要方法:
- 生命周期评估 (LCA) 方法应用于七个垃圾填埋场最终覆盖系统.
- 评估生产,施工和运营阶段的成本,碳排放和封存.
- 对全球变暖,高化,生态毒性和资源稀缺等环境影响的分析.
- 对电动机械和运输距离的敏感性分析.
主要成果:
- 使用回收混凝土聚合物 (RCA) 和生物炭的三层覆盖系统展示了最低的单位成本 (低至88%) 和碳排放 (低至66%).
- 这种系统实现了最高的碳捕获率 (47.9公斤CO2/y·m2),是压缩粘土的四倍.
- 环境影响减轻率高达82%,大大减少了全球变暖和其他生态毒理学影响.
结论:
- 使用RCA的生物炭修改的三层覆盖系统,没有地质膜,提供卓越的经济效益和环境性能.
- 这种创新的覆盖系统符合碳中和目标,并促进了对垃圾填埋场的可持续发展.
- 它为传统的垃圾填埋场盖设计提供了一个可行的替代方案,减少了整体的环境负担.
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