了解微生物反应,并开发在盐度应激下废水处理中硫自性脱的增强性去除
Zaixing Li1, Qi Liu2, Nannan Wang1
1Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; Wastewater Nitrogen Integrated Treatment Technology Innovation Center of Hebei Province, Shijiazhuang 050200, China.
Environmental research
|December 25, 2025
概括
高度严重阻碍了生物废水处理. 这项研究揭示了盐度如何影响微生物群落,生物膜结构和脱基因,这对于优化治疗系统至关重要.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 生物技术是生物技术.
背景情况:
- 高度是生物废水处理系统面临的主要挑战.
- 了解微生物对盐度的反应对于系统的稳定性和效率至关重要.
- 自营硫基脱化是受盐度影响的关键过程.
研究的目的:
- 研究不同盐度对脱性能的影响.
- 分析微生物社区动态和功能性基因反应在盐度压力下.
- 阐明盐度对生物膜结构和活性的影响机制.
主要方法:
- 建立了以硫为基础的自性脱系统,具有盐度梯度 (0%,1%,3%,5%).
- 使用分子技术监测酸盐去除率和分析微生物社区结构.
- 量化了功能性脱基因丰度 (narG, nirS, nirK, nosZ) 和评估了生物膜形态.
主要成果:
- 随着盐度的增加,脱化效率显著下降,在5%的盐度下达到最低19.46%.
- 高盐度 (5%) 损害了细胞活力 (降至45.6%),抑制了细胞外聚合物质 (EPS) 合成,并放松了生物膜结构.
- 微生物群落发生了转变,Thiobacillus的数量减少,Vitellibacter的数量增加;narG和nirS基因高度敏感,而nirK表现出耐受性.
结论:
- 脱化效率取决于整个基因通路的协同活性,而不是单个基因.
- 盐度压力通过改变微生物社区结构,基因表达和生物膜完整性来影响生物废水处理.
- 这些发现为优化盐废水的生物处理提供了一种机制的理解.
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