水热碳化对热解行为,在城市污泥中的营养物和金属物种分布的影响
Changhao Liu1, Zhengbo Yue2, Ding Ma2
1School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
Bioresource technology
|March 16, 2024
概括
废物活性污泥的水热碳化 (HTC) 降低了热解激活能量,并增强了营养回收. 这一过程还稳定了重金属,使HTC成为一个有前途的污泥处理方法.
科学领域:
- 环境工程 环境工程
- 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:
- 废物活性污泥 (WAS) 是一个重要的处理挑战.
- 热解是一种潜在的 WAS 处理和资源回收方法.
- 了解预处理对热解的影响至关重要.
研究的目的:
- 为了研究水热碳化 (HTC) 对WAS热解行为的影响.
- 分析中营养物质 (,) 和金属物种的分布.
- 评估热解激活能量和营养素可用性的变化.
主要方法:
- 废物活性污泥 (WAS) 在各种温度下经过水热碳化 (HTC).
- 使用激活能计算和热力学参数分析了热解行为.
- 用化学分析和标准测试协议来确定营养成分 (P,N) 和重金属特异性.
主要成果:
- HTC将WAS的热解激活能量从11-57kJ/mol降低到10-36kJ/mol.
- HTC提高了和的释放和可用性,在200°C时获得最大回收.
- HTC增加了非酸盐无机P分量,并加强了WAS中的重金属的稳定性.
结论:
- 水热碳化有效降低了废物活性污泥的热解激活能量.
- HTC显著改善了从WAS中和的回收和可用性.
- HTC增强了由此产生的碳化合物的重金属稳定性,表明其对可持续污泥管理的潜力.
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