化剂对膜化生物反应器中逐渐增加的pH值条件的反应:微生物动力学和抗机制
Weican Shi1, Zhaoming He1, Jiahui Lu1
1Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing, Jiangsu 210094, China.
Water research
|October 8, 2024
概括
活性污泥化剂通过增加酸性分泌物和增强细胞机制来适应性条件. 这项研究表明,在320天的性生物反应器中,强大的氨去除,揭示了微生物社区的转变和生理适应.
科学领域:
- 环境微生物学环境微生物学
- 污水处理 污水处理 污水处理
- 生物反应器工程 生物反应器工程
背景情况:
- 化和化细菌对pH值敏感,特别是在性活性污泥系统中.
- 化剂对性环境的长期反应仍然不太清楚.
研究的目的:
- 研究长期性条件下的化效率和微生物群落适应.
- 为了阐明抗机制,在连续流膜化生物反应器中使用化剂.
主要方法:
- 膜化生物反应器连续运行320天,pH值逐渐增加 (7.5到10.0).
- 分析了氨去除效率,细胞外聚合物 (EPS),微生物群体组成 (16S rRNA基因测序) 和关键酶活动 (阴离子/质子抗载体,碳酸).
主要成果:
- 保持了强大的化,平均氨去除效率在pH值高达10.0的条件下为96.6±2.2%.
- 性适应涉及酸性多糖和有机化合物的增强分泌,Nitrosomonas和Nitrospira的显著丰富,以及阴离子/质子抗载体 (NhaA,TrkA,KefB) 和碳酸无水酶的活性增加.
- 在微生物表面观察到通过CaCO3沉积的生物矿物化.
结论:
- 活性污泥系统可以通过综合生理和微生物社区机制适应长期的性条件.
- 增强的EPS生产,特定的微生物丰富和有效的细胞内pH调节是化剂在性环境中的生存和功能的关键.
- 结果提供了关于化微生物在具有挑战性的废水处理场景中的弹性和适应策略的见解.
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