用MnO2修改生物炭推进无氧消化:对性能和机制的洞察
Yeqing Li1, Jinglei Zhang2, Xinran Wen2
1State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, College of New Energy and Materials, China University of Petroleum Beijing (CUPB), Beijing 102249, China; Shandong Institute of Petroleum and Chemical Technology, Carbon Neutrality Research Institute, Dongying 257061, China.
The Science of the total environment
|September 19, 2024
概括
生物炭/MnO2复合材料通过改善电子转移,在无氧消化过程中显著增加甲生产. 这种基于生物炭的材料增强了挥发性脂肪酸含量和微生物活性,为先进的生物能源应用铺平了道路.
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) 是生物能源生产的关键过程.
- 在AD中提高甲产量对于可持续能源至关重要.
- 生物炭/MnO2复合物 (MBC) 显示了提高AD效率的潜力.
研究的目的:
- 为了研究AD中MBC的电子转移机制.
- 评估MBC在复杂的AD系统中的应用.
- 了解MBC如何影响微生物群落和甲生产.
主要方法:
- 生物炭/MnO2复合物的制备,其质量比为10:1 (MBC10).
- 在酸性阶段评估挥发性脂肪酸含量.
- 使用乙酸盐和食品废物测量累积甲产量 (CMP).
- 使用16S rRNA测序分析微生物社区组成.
- 在不同的氨和有机负载条件下评估MBC10的性能.
主要成果:
- 在酸性阶段,MBC10增加了9.09%的挥发性脂肪酸.
- 酸盐的CMP增加了5.83%,食物浪费的CMP增加了24.32%.
- 微生物分析显示了Syntrophomonas,Bacilli和Methanosaetaceae的丰富性.
- MBC的氧化还原能力增强了电容,促进了电子转移.
- 在高氨和有机负载下,MBC10提高了CMP的12.74%和9.44%.
结论:
- 在无氧消化过程中,MBC显示了增强甲生产的巨大潜力.
- MnO2的氧化还原特性是促进微生物电子转移的关键.
- 在复杂的AD系统中,MBC显示出实际应用的希望,提高了效率和稳定性.
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