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通过二元电活性材料进行增强的无氧废水处理:伪电容/导电介导微生物物种间电子转移

Mingwei Wang¹, Tengfei Ren¹, Mengxi Yin¹

¹State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Environmental science & technology

|July 24, 2023

概括

这项研究引入了Fe3O4@生物炭,通过增强细菌和甲基生物之间的电子转移,促进甲生产和稳定pH来改善无氧消化 (AD).

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) 对于有机废物处理是有效的,但由于无效的物种间电子转移和代谢失衡而受到限制.
提高直接跨物种电子转移 (DIET) 对于优化AD性能至关重要.

研究的目的:

研究一种新型二元电活性材料Fe3O4@生物炭的使用,以改善电子转移和AD效率.
阐明伪电容和导电性在AD期间调解微生物电子转移中的机制.

主要方法:

具有特定伪电容性和导电性的Fe3O4@生物炭的制造和表征.
在现场分析微生物代谢,电子转移途径和不同阶段的AD性能.
评估关键的生化指标,如ATP,NADH/NAD+,共酶F420和pH.

主要成果:

Fe3O4@生物炭通过伪电容性电子接受在水解酸化过程中增强了21%的ATP合成.
Fe3O4@生物炭促进了饮食,在甲生成过程中增加了66%的辅酶F420和13%的甲产量.
该材料缓冲了多余的电子,减轻了pH值下降,并改善了AD的整体稳定性.

结论:

Fe3O4@生物炭有效地增强无氧消化过程中的电子转移和微生物代谢.
二元材料的伪电容性和导电性提供了一个双重机制来优化AD过程.
这项工作提出了设计电活性材料的新策略,以提高无氧处理效率.

关键词:

无氧消化消化无氧消化生物炭是一种生物炭.两种物种之间的电子转移.磁铁的磁铁是磁性质的磁铁.甲基生物的产生.

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