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在氨压下电活性无氧颗粒污泥的性能:性能,微生物和形态

Yang Zhuo¹, Hao Wang¹, Xuena Wang¹

¹School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, 13 Yanta Road, Xi'an 710055, China.

Bioresource technology

|February 26, 2025

概括

氨气压力抑制无氧消化性能. 这项研究表明,通过重建污泥结构,即使在高氨条件下,也可以改善直接物种间电子转移 (DIET).

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.

背景情况:

热水解预处理增强有机负载,但在高固体无氧消化过程中可能导致氨应激.
氨气压力对甲生成性能和整体无氧消化效率产生负面影响.

研究的目的:

调查直接跨物种电子转移 (DIET) 的潜力,以提高无氧颗粒污泥 (AnGS) 在氨压力下的性能.
为了了解微生物群落的转移和由于氨压力的AnGS的结构变化.

主要方法:

在不同的氨酸条件下,用乙醇化AnGS.
测量化学氧气需求 (COD) 清除效率和2-p-iodophenyl) -3-p-nitrophenyl) -5-phenyl tetrazolium chloride-electron transport system (ETS) 活动. 通过测量化学氧气需求 (COD) 清除效率和2-p-iodophenyl) -3-p-nitrophenyl) -5-phenyl tetrazolium chloride-electron transport system (ETS) 清除效率,测量化学氧气需求 (COD) 清除效率和2-p-iodophenyl) -3-p-nitrophenyl) -5-phenyl tetrazolium chloride-electron transport system (ETS) 清除效率,测量化学氧气需求 (COD) 清除效率和2-p-iodophenyl-3-nitrophenyl-5-phenyl tetrazolium chloride-electron transport system (ETS) 清除效率.
使用16S rRNA基因测序进行微生物社区分析.

主要成果:

在氨气压力下,COD去除效率从95%降至75%,ETS活动下降了16%.
微生物社区分析显示,饮食伴侣发生了转变,其中存在甲诺特里克斯缺乏.
氨压力改变了AnGS的空间结构,影响了污泥的完整性.

结论:

直接跨物种电子转移 (DIET) 对无氧颗粒污泥 (AnGS) 中的氨应激敏感.
通过结合线状甲原体来重建AnGS的空间结构,可能会在氨气压力下改善DIET的性能.

关键词:

氨的抑制氨的抑制无氧消化消化无氧消化直接的物种间电子转移.上游无氧污泥毯子上游无氧污泥毯子

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