对微生物电解细胞中主要发酵产品中的外电源利用偏好和转化进行比较研究
Yunjeong Choi1, Danbee Kim2, Hyungmin Choi1
1Department of Civil, Urban, Earth, and Environmental Engineering, UNIST, Ulsan 44919, Republic of Korea.
Bioresource technology
|November 28, 2023
概括
乙酸盐和乳酸盐最适合从有机废物中在微生物电解细胞 (MEC) 中生产. 基质成分显著影响MEC性能和微生物群落,影响生物阳极的发展.
科学领域:
- 微生物学 微生物学
- 电化学 电化学 电化学
- 环境科学 环境科学
背景情况:
- 暗发酵从废物中产生各种有机酸和醇.
- 微生物电解细胞 (MEC) 可以将这些产品转化为.
- 了解基板利用是优化MEC性能的关键.
研究的目的:
- 为了比较主要的黑色发酵产品的外电生成潜力.
- 在MEC中评估不同基板的转化效率.
- 分析基质成分对生物阳极发展的影响.
主要方法:
- 使用了双室微生物电解细胞 (MEC).
- 单个基质 (乙酸,酸,丁酸,乳酸,乙醇) 和混合物进行了测试.
- 分析了产量,库伦比效率,电流密度和微生物社区结构.
主要成果:
- 乙酸产生了最高的产量 (1,465毫升/克COD) 和高效率 (105%).
- 乙醇显示出最高的生产率 (514 mL/L anolyte∙d),但效率较低.
- 丁酸盐和酸盐的利用率很低,延迟了MEC的启动和反应.
- 基质显著改变了无氧微生物群体,在Geobacter和Acetobacterium的主导地位上发生了变化.
结论:
- 乙酸盐和乳酸盐是MEC中生产的优质基质.
- DFE的组成对MEC的效率和生物阳极微生物群落产生了重大影响.
- 优化DFE对于有效的生物生成至关重要.
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