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泥的组成和特征塑造了微生物群落,并进一步确定了工艺性能:对全面热水解-无氧消化过程的研究

Wei Liu¹, Chenxiang Sun², Wei Li³

¹School of Environment, Tsinghua University, Beijing 100084, China.

Journal of environmental sciences (China)

|November 18, 2023

概括

热水解 (TH) 与无氧消化 (AD) 在污泥处理中是有效的. 然而,高水平的挥发性脂肪酸 (VFA),氨和化学氧气需求 (COD) 可以抑制微生物群落并减少甲生产.

科学领域:

环境微生物学环境微生物学
生物技术是生物技术.
废水处理工程废水处理工程

背景情况:

无氧消化 (AD) 与热水解 (TH) 预处理相结合,是过剩污泥管理的关键技术.
关于污泥特征对微生物群落的影响和全面TH-AD系统的性能的了解有限.

研究的目的:

研究泥生理化学指数,微生物群落结构和全尺寸TH-AD工厂中甲基生成性能之间的关系.
确定关键的操作参数和微生物指标,以优化TH-AD过程效率.

主要方法:

污泥生化指数的表征,微生物群落组成 (使用16S rRNA基因测序) 和四个全规模TH-AD工厂的沼气生产.
在性能优越 (SupG) 和性能低劣 (InfG) 的工厂之间对操作数据和微生物特征进行比较分析.

主要成果:

TH预处理有效地溶解了有机物质,但增加了VFA,氨和总化学氧气需求 (tCOD) 的度.
性能较差的植物 (InfG) 呈现出较高的VFA,氨和tCOD水平,导致微生物抑制,减少多样性,以及功能协会的转变 (较低的碳水化合物降解剂,较高的蛋白质降解剂).
特定的微生物种群,包括Defluviitoga和Proteiniphilum,被确定为劣质操作条件的指标.

结论:

有机载荷率 (OLR) 单独不足以控制TH-AD系统;VFA,氨和tCOD度是关键性能指标.
微生物社区结构作为环境因素和过程性能之间的桥梁,为工程生态和操作策略提供了洞察力.
识别和管理抑制物质和特定的微生物指标可以提高全面的污泥TH-AD过程的效率和稳定性.

关键词:

无氧消化消化无氧消化全面的规模 - - 全面的规模.微生物社区的微生物社区.热水解是热水解的方法.

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