基于细菌阳极的微生物电解细胞被封装在含有石墨颗粒的透析袋中
Irina Amar Dubrovin1, Lea Ouaknin Hirsch1, Abhishiktha Chiliveru1
1Department of Chemical Engineering, Ariel University, Ariel 40700, Israel.
Microorganisms
|July 27, 2024
概括
在透析袋中用石墨颗粒封装细菌阳极显著提高了微生物电解细胞的性能,提高了电流密度和生产率.
科学领域:
- 微生物电化学 微生物电化学
- 生物电化学系统 生物电化学系统
- 废水处理 废水处理
背景情况:
- 微生物电解细胞 (MEC) 中的细菌阳极经常受到非外电致细菌的阻碍,这阻碍了电流转移并减少了的产生.
- 这些非外电原体形成物理障碍,并争夺营养,对MEC效率产生负面影响.
研究的目的:
- 通过增强来自细菌阳极的电流传输来提高MEC的性能.
- 为了研究在透析袋中用悬浮石墨颗粒封装细菌阳极的效果.
主要方法:
- 开发了一种新的阳极设计,包括在含有悬浮石墨颗粒的透析袋中进行封装.
- 对照组包括一个被封装在没有石墨的透析袋中的阳极和一个裸体阳极.
- 使用人工废水和Geobacter介质评估性能,测量电流密度,生产率,面积容量和COD去除.
主要成果:
- 与对照组相比,使用石墨透析袋阳极的MEC实现了明显更高的电流密度 (2.73 A·m−2),气生产率 (7.6 × 10−2 m3·m−3·d−1) 和面积容量 (134.13 F·m−2) .
- 电化学阻抗光谱检测显示,修改过的阳极具有最低的电荷传递电阻 (35 Ω).
- 与人工废水 (40%) 相比,使用Geobacter媒介观察到更高的化学氧气需求 (COD) 清除 (53%).
结论:
- 用石墨颗粒封装细菌阳极有效地克服了非外电致细菌所带来的局限性.
- 这种修改大大提高了MEC的性能,包括当前的发电和生产.
- 石墨透析袋阳极在MECs中显示出对高效的废水处理和生物能源生产的承诺.
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