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工程细胞外电子转移以促进同时造废水处理和减少

Deguang Wu¹, Baocai Zhang², Sicheng Shi²

¹Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education), Tianjin Industrial Microbiology Key Lab, College of Biotechnology, Tianjin University of Science and Technology, Box 08, No. 29, 13ST. TEDA, Tianjin 300457, PR China.

Journal of hazardous materials

|December 26, 2023

概括

这项研究开发了一种能自给自足的微生物燃料电池 (MFC),用于废水处理和重金属减少. 增强的外电源细胞外电子转移 (EET) 显著提高了发电和污染物清除效率.

科学领域:

环境科学环境科学
生物技术是生物技术.
电化学电化学电化学

背景情况:

微生物燃料电池 (MFC) 为同时处理废水和回收能源提供了一种可持续的方法.
在MFC应用中的一个关键限制是外电致细菌的缓慢的细胞外电子转移 (EET) 速率.
高效的重金属减少,特别是六价 (Cr6+),在MFC系统中仍然是一个挑战.

研究的目的:

开发一个能源自给自足的MFC系统,以有效处理废水和减少Cr6+.
提高外电源的EET率,以提高MFC性能.
为了构建一个高导电性的生物阳极,以优化电子传输.

主要方法:

从适应污泥中选具有高EET能力的外电致细菌.
精选的外电原体 (Shewanella藻-L3) 的基因工程,以过度表达黄素合成基因 (ribADEHC) 以增强EET.
使用碳纳米管 (CNT) 与工程外电原体 (S.藻-L3F-CNT) 集成的导电生物阳极的制造.

主要成果:

选的Shewanella藻-L3实现了566.83mW的功率密度.
经过工程设计的S.藻-L3F具有增强的黄素生物合成,其功率密度为1233.21mW m-2 .
S. algae-L3F-CNT生物阳极达到3112.98 mW m-2的功率密度,显著改善了ET和发电.
该MFC系统实现了71.43%的化学氧需求 (COD) 消除和98.14%的Cr6+减少.

结论:

增强的外电源ETE对于改善MFC在废水处理和重金属整治方面的性能至关重要.
基因改造和生物阳极工程是提高MFC功率输出和效率的有效策略.
开发的MFC系统提供了一个有前途的,节能解决方案,用于处理复杂的工业废水,污染了重金属.

关键词:

造酒的废水是如何处理的阴极Cr6+) 的减少.细胞外电子转移细胞外电子转移微生物燃料电池是一种微生物燃料电池.这是一种Shewanella藻类.

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