在含有铁化合物的污泥无氧共消化中对C-S-Fe-P转化进行基于氨酸的洞察
Cong Zhang1, Zhipeng Zhang2, Shuang Zhang1
1State Key Laboratory of Water Pollution Control and Green Resource Recycling, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Water research
|September 3, 2025
概括
与铁化合物 (FePs) 的无氧共消化显著减少有害的硫化和甲基,同时增加甲的产生. 通过促进从污泥中释放,FeP还可以增强的回收.
科学领域:
- 环境科学
- 生物技术
- 生物地质化学
背景情况:
- 富含硫的废物与含铁化合物 (FeP) 的污泥进行无氧共消化是资源回收和污染控制的一个有前途的策略.
- 了解这一过程中复杂的C-S-Fe-P转换对于优化其效率至关重要.
研究的目的:
- 阐明FePs物种化与无氧共消化过程中的碳,硫,铁和的转化之间的机制性合.
- 研究不同FeP对硫化和甲生产以及释放的影响.
主要方法:
- 使用甲素 (作为含硫的有机模型) 和五种不同的FePs的无氧共消化实验.
- 气体生产 (H2S,CH4) 的分析,C,S,Fe和P的化学分化.
- 基因组分析以评估微生物群体的转移和基因表达.
主要成果:
- 添加FePs减少了H2S和甲基分别超过96%和99%,同时增加了51.60-103.9%的甲产量.
- FePs促进了硫化物转化为固体硫和铁沉物,促进了PO43的释放.
- 铁酸盐 (FePO4) 具有最高的P释放效率 (89.83-91.01%),这是由于其较低的Fe/P摩尔比率和有利的热力学.
- 转基因组学揭示了参与甲乙醇降解和甲生成的基因的上调.
结论:
- 在无氧共消化过程中,FeP在减轻H2S排放和提高甲产量方面发挥着至关重要的作用.
- 铁的物种化显著影响了P释放效率,而FePO4是最有效的.
- 这项研究提供了关于C-S-Fe-P相互作用的宝贵见解,支持改进废物管理和资源回收战略.
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