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同时诱导多个定数感应电路,以帮助从挥发性脂肪酸积累中恢复无氧消化

Fengqin Liu¹, Yu Zhang¹, Wenyan Shen¹

¹College of Life Sciences, Henan Agricultural University, No.63 Agricultural Road, Zhengzhou, 450002, China.

|June 20, 2024

概括

酸通过激活定数感应信号来帮助无氧消化恢复,在挥发性脂肪酸积累后恢复效率. 这一过程增强了污泥颗粒化,并改善了化学氧气需求去除.

科学领域:

环境科学环境科学
微生物学微生物学
生物技术是生物技术.

背景情况:

无氧消化 (AD) 对于废水处理和生物气生产至关重要.
挥发性脂肪酸 (VFA) 的积累可以破坏AD过程,导致效率降低.
定数感应 (QS) 分子调节微生物活动,但独立应用是不切实际的.

研究的目的:

调查酸在从VFA积累中恢复上游无氧污泥毯 (UASB) 反应器中的有效性.
阐明定数感应信号在恢复过程中的作用.

主要方法:

将1mg/L的酸应用于经历VFA积累的UASB反应器.
监测化学氧气需求 (COD) 的去除效率.
微生物群落结构的分析,重点是乙类甲基生物.
乙酸盐度和污泥颗粒化的量化.

主要成果:

酸的应用使COD去除率从55.86%恢复到75.10%.
乙酸盐度从1317.03毫克/升降至224.50毫克/升.
酸激活的物种间 (AI-2) 和物种内 (N-acyl-homoserine lactones,AHLs) QS信号,促进有益的微生物生长和污泥颗粒化.

结论:

酸通过调节QS信号通路,有效地帮助UASB反应器从VFA积累中恢复.
这项研究展示了一种实际的方法来提高AD的稳定性和性能.
QS信号激活是管理AD过程中断的有希望的策略.

关键词:

无氧消化消化无氧消化甲原体的产生微生物社区的微生物社区.议员数量检测是指对议员数量进行检测.挥发性脂肪酸的积累挥发性脂肪酸的积累

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