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在不同热解温度下获得的生物炭在污水污泥无氧消化过程中对重金属物种的作用

Wen Zhang¹, Chunsheng Qiu¹, Ruoxin Li¹

¹Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, People's Republic of China.

Environmental technology

|July 30, 2025

概括

将生物炭添加到污水污泥中可以增强无氧消化和甲生产. 虽然重金属含量增加,但生物炭稳定金属,减少环境风险和生态影响,特别是当在600°C准备时.

科学领域:

环境科学环境科学
生物技术是生物技术.
化学工程是化学工程的重要组成部分.

背景情况:

污水污泥管理是一个全球性的挑战.
无氧消化 (AD) 是污泥处理和生物气生产的关键技术.
污泥中的重金属污染对环境构成风险.

研究的目的:

为了研究在不同热解温度下产生的生物炭对污水污泥的AD的影响.
评估对重金属物种化,分布和环境风险的影响.
为了确定最佳的生物炭制备温度,以提高AD和降低风险.

主要方法:

污水污泥经过无氧消化,添加生物炭 (热解温度300-800°C).
分析了系统的pH值,氨,甲产量和重金属物种.
计算了尼默罗污染指数 (NPI) 和潜在生态风险指数 (RI).

主要成果:

添加生物炭稳定了pH (7.43-7.77),并减少了氨积累.
累计甲产量增加了14.31-151.32%,在600°C生物炭的最佳促进下.
重金属含量增加,但物种化转向更稳定的形式,保持NPI < 1 (低风险).
潜在的生态风险指数 (RI) 显著下降,高达43.36%与600°C生物炭.

结论:

生物炭提高了无氧消化效率和污水污泥中的甲产量.
生物炭的应用将重金属转化为稳定的形式,减轻环境风险.
在600°C生产的生物炭对改善AD和减少污泥中的重金属风险是最有效的.

关键词:

污水污泥的污水污泥是污水中的污泥.无氧消化消化无氧消化生物炭是一种生物炭.重金属重金属的使用.热解的温度是热解的温度.

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