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对合成乙醇氧化的新见解:运行模式和固体保留时间的影响

Bang Du¹, Zhongzhong Wang¹, Piet N L Lens²

¹Civil Engineering, School of Engineering, College of Science and Engineering, University of Galway, Galway, H91 TK33, Ireland.

Environmental research

|November 8, 2023

概括

厌氧乙醇氧化被微生物合成增强. 反应器模式和固体保留时间 (SRT) 显著影响微生物群落和酸盐积累,影响工艺效率.

科学领域:

微生物学微生物学
环境工程环境工程
生物技术是生物技术.

背景情况:

无氧乙醇氧化需要合成微生物联盟来实现热力学可行性.
像反应器模式和固体保留时间 (SRT) 这样的操作参数对于优化这些过程至关重要.

研究的目的:

调查不同运行模式 (测序批量反应堆-SBR,连续流反应堆-CFR) 和SRT (25天和10天) 对无氧乙醇氧化的影响.
在不同的条件下分析系统性能,合成关系,微生物群落和代谢途径.

主要方法:

四个以乙醇供应的反应堆 (SBR25d,SBR10d,CFR25d,CFR10d) 在不同的条件下运行.
系统性能,微生物社区结构和代谢途径被全面检查.

主要成果:

在CFR10d中发生了乙酸盐积累 (2002.7 ± 56.0毫克COD/L),这是由于乙酸性甲素冲洗.
较长的SRT (25天) 丰富了具有高半和常数的微生物.
SBRs适应了具有高半和常数的乙醇氧化细菌和酸甲原体.
在SBR中,低SRT (10天) 增加了Geobacter的丰富性,而在CFR中,它增加了Desulfovibrio,并丰富了像Methanobrevibacter这样的性甲基生物.

结论:

反应堆运行模式和SRT在无氧乙醇氧化过程中显著影响微生物群体结构和功能.
具有较长SRT的SBR适合适应特定的微生物群体,而具有较短SRT的CFR可以丰富不同的合成细菌和甲基生物.

关键词:

乙醇氧化过程中的乙醇氧化.甲基生物是一种甲基生物.操作模式操作模式固体的保留时间固体的保留时间合成型细菌是一种合成型细菌.

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