伪电容导电材料在污泥无氧消化过程中驱动直接与中介电子转移通路的选择性转移
Xiaoyuan Zhang1, Pingfan Zhang2, Junli Tian2
1Engineering Laboratory of Low-Carbon Unconventional Water Resources Utilization and Water Quality Assurance, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin 300350, China.
Bioresource technology
|March 9, 2026
概括
酸改性铁生物炭 (Fe-TA-C) 通过调节电子转移通路来优化无氧消化 (AD). 剂量控制了直接物种间电子转移 (DIET) 和中介物种间电子转移 (MIET) 之间的转移,增强了甲的产生.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
背景情况:
- 无氧消化 (AD) 对于废物管理和能源回收至关重要.
- 导电材料增强AD,但它们对电子转移通路的剂量依赖作用尚不清楚.
- 了解这些途径是优化甲生产的关键.
研究的目的:
- 研究酸改性铁生物炭 (Fe-TA-C) 剂量如何调节AD中的物种间电子转移通路.
- 阐明驱动直接物种间电子转移 (DIET) 和中介物种间电子转移 (MIET) 之间的过渡的机制.
- 通过定制的电子转移策略建立优化AD的基础.
主要方法:
- 在AD实验中使用Fe-TA-C作为导电材料.
- 分析了不同剂量的Fe-TA-C的甲产量,微生物群落组成和基因表达.
- 研究了Fe-TA-C的电化学特性,包括伪电容和氧化还原行为.
- 评估dicumarol对电子转移通路的影响.
主要成果:
- 甲产量在100 mg/gVS Fe-TA-C时最大化,增加了24.1%.
- 低到中等的Fe-TA-C剂量 (50-100 mg/g VS) 通过Fe氧化还原循环和导电性促进了饮食,丰富了Methanothrix.
- 较高的Fe-TA-C剂量转移到MIET,由伪电容和扩大子池驱动,具体的氧化还原信号和微生物丰富证明.
结论:
- 在无氧消化过程中,Fe-TA-C剂量极大地影响了DIET和MIET之间的过渡.
- Fe-TA-C的伪容量行为在这种剂量依赖的途径转移中起着关键作用.
- 这些发现为通过控制的电子转移优化AD性能提供了机械的理解.
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