飞灰与污水污泥的共同热解用于PCDD/F去除
Chang Hua Hsieh1, Minh Man Trinh2, Moo Been Chang3
1Graduate Institute of Environmental Engineering, National Central University, Taoyuan, 32001, Taiwan.
概括
飞灰与污水污泥的联合热解有效地去除了99%以上的有毒多化二子-p-二氧化物和二酸 (PCDD/F). 这种方法符合欧洲废弃物终结标准,用于安全处置或重复使用焚烧炉飞灰.
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.
- 废物管理 废物管理
背景情况:
- 城市垃圾焚烧 (MWI) 飞灰含有需要处理的有毒物质.
- 多二-p-二氧化和二福兰 (PCDD/Fs) 是MWI飞灰中的重要污染物.
- 传统的处理方法,如水洗和热热解热,都有局限性.
研究的目的:
- 为了研究飞灰与污水污泥对PCDD/F减少的联合热解的有效性.
- 确定抑制PCDD/F形成和新合成的最佳条件.
- 评估处理后的飞灰是否符合欧洲废物终结标准.
主要方法:
- 飞灰和污水污泥在350°C的共同热解.
- 改变飞灰与污水污泥的比率 (1:1).
- 分析PCDD/F度和去除效率.
主要成果:
- 同火解通过抑制前体合成,显著降低了PCDD/F的形成.
- 基于质量度,PCDD/Fs的去除效率超过99%.
- 在350°C下10分钟的反应时间与1:1的飞灰/污水污泥比率满足了欧洲废物终结标准 (≤20 pg TEQ/g).
结论:
- MWI飞灰与污水污泥的联合热解是PCDD/F破坏的高效方法.
- 该工艺为处理危险飞提供了可行的解决方案,使其能够安全处置或重复使用.
- 该研究展示了一种具有成本效益和效率的方法,以满足严格的废物管理环境法规.
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