通过整合单室无氧消化和微生物电解细胞系统,用于甲生产的纤维素乙醇沉
Tian-Jie Ao1, Jie Wu2, Kai Li3
1State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; Forest Product Biotechnology, Bioenergy Group, Department of Wood Science, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada.
The Science of the total environment
|August 28, 2024
概括
将1.0V应用于无氧消化集成微生物电解细胞系统,可以显著提高玉米炉基乙醇沉产生的甲产量. 这种电压可以提高生物气质量和微生物活动,而不会抑制关键细菌.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 生物反应器工程 生物反应器工程
背景情况:
- 基于玉米炉的乙醇置 (CES) 的不适当处置导致碳资源利用效率低下.
- 无氧消化 (AD) 为废物利用提供了一种可持续的方法.
- 集成微生物电解电池 (MEC) 可以提高AD效率和生物气质量.
研究的目的:
- 为了研究应用电压在单室AD-MEC系统对CES转换的影响.
- 使用AD-MEC技术优化生物气生产和现场升级.
- 了解不同电压条件下的微生物社区动态.
主要方法:
- 开发一个单腔无氧消化集成微生物电解细胞 (AD-MEC) 系统.
- 使用0至2.5V的电压将CES转化为沼气.
- 对生物气体成分 (CH4含量),甲产量,微生物群落结构和电极生物膜形成的分析.
主要成果:
- 应用1.0V显著增加了甲 (CH4) 产量55%,并将现场的CH4含量提升到82%.
- 一个1.0V的应用促进了强大的电极生物膜的形成,导致电流增加20倍.
- 更高的电压 (1.5-2.5V) 抑制了合成有机酸氧化细菌 (SOB),导致酸积累和甲原抑制.
结论:
- 轻度电压为1.0V,是使用AD-MEC提高CES生物气产量和质量的最佳选择.
- 最佳电压促进电极上的电活性细菌 (EB) 丰富,促进高效的电子转移和甲基生成.
- 在温和电压下逐渐丰富EB减轻了对本地微生物群落的负面影响,改善了AD的整体性能.
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