在中国进行电污泥再利用的比较研究:环境和经济性能
Tong Li1, Guoxia Wei2, Hanqiao Liu3
1College of Energy and Safety Engineering, Tianjin Chengjian University, Tianjin, 300384, China.
Environmental science and pollution research international
|September 21, 2023
概括
电污泥 (ES) 处理需要环保方法. 与炼或共同加工方法相比,酸和生物提供了优越的重金属回收和环境效益.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 金工业是金工业的一个方面.
背景情况:
- 电污泥 (ES) 由于重金属含量高,造成了环境挑战.
- 经济和环保的加工技术对于ES的再利用至关重要.
- 目前的中国再利用方法包括酸,生物,炼,铁制高炉联合加工 (IBFC) 和水泥炉联合加工 (CKC).
研究的目的:
- 评估和比较中国主要的ES再利用替代方案.
- 通过生命周期评估 (LCA) 和生命周期成本 (LCC) 评估每个方法的环境和经济可行性.
- 确定重金属回收潜力,以实现可持续的资源利用.
主要方法:
- 生命周期评估 (LCA) 用于环境影响评估.
- 用于经济分析的生命周期成本计算 (LCC).
- 重金属回收潜力的评估.
主要成果:
- LCA表明,由于金属回收,酸出水在环境上是优越的;由于高能耗,炼是最糟糕的.
- LCC显示生物训练是最具成本效益的,而CKC是最不具可行性的.
- 生物洗提供了最高的重金属回收率 (高达99%),其次是酸洗和炼 (93%).
结论:
- 酸和生物是基于全面的环境和经济评估的最有利的ES再利用场景.
- 可持续重金属回收是推动生物洗和酸洗的优势的一个关键因素.
- 能源消耗对炼,IBFC和CKC的环境性能产生重大影响.
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