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纳酸 (NAs) -耐氧颗粒污泥:去除性能,降解机制和微生物反应

Jin Li¹, Shasha Liu¹, Simeng Li¹

¹State Key Laboratory of Petroleum Pollution Control, Beijing Key Laboratory of Oil and Gas Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China.

Journal of environmental management

|August 23, 2025

概括

有氧颗粒污泥 (AGS) 有效地去除酸 (NA). 经过适应的AGS表现出增强的耐受性和更快的NAs去除,改善了废水处理效率和微生物群体结构.

科学领域:

环境生物技术
废水处理
微生物生态学

背景情况:

纳酸是需要有效处理的持续性环境污染物.
有氧颗粒污泥 (AGS) 显示出可以去除NA的可能性,但机制尚不清楚.
了解AGS中的微生物反应对于优化NA的生物降解至关重要.

研究的目的:

将耐受性AGS (T-AGS) 与未适应性AGS (C-AGS) 的NA降解机制和微生物反应进行比较.
研究污泥化对NA的去除效率和微生物群落结构的影响.
阐明细胞外聚合物 (EPS) 在 AGS 性能中的作用.

主要方法:

在不同的CHCA度下对T-AGS和C-AGS进行系统比较.
生物质含量,沉积,颗粒稳定性和营养物质去除的分析 (TN,PO43-P).
使用16S rRNA测序和PICRUSt进行功能基因预测的微生物群体分析.

主要成果:

通过生物降解,T-AGS实现了99%的CHCA去除,超过了C-AGS.
T-AGS表现出增强的生物质,稳定性和EPS产量 (托和芳香蛋白类物质).
T-AGS显示出优异的TN (12-18%更高) 和PO43-P (25%更高) 移除;主导属转移到Zooglea和Azoarcus.
PICRUSt检测出增强的氨基酸代谢,膜传输,信号转导以及上调的CHCA降解和脱基因.

结论:

污泥化显著提高了AGS去除NA的性能.
T-AGS表现出卓越的耐受性,降解效率和营养物质去除能力.
微生物群落的转移和增强的代谢途径对于AGS有效的生物降解至关重要.

关键词:

吸附方式有氧颗粒污泥生物降解微生物群落纳酸

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