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Updated: May 23, 2025

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在A/O-MBR和A/A-MBR系统中,COD度对膜污染和微生物群落的影响
JianPing Huang1, Huiru Zhang1, XiaoZheng Bian1
1School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China.
Environmental technology
|May 21, 2025
概括
在膜生物反应器 (MBR) 中优化碳来源是减少膜污染的关键. 较高的化学氧气需求 (COD) 水平增加了污染和减少了去除,而A/O-MBR系统表现更好.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 微生物学 微生物学
背景情况:
- 膜生物反应器 (MBR) 对于废水处理至关重要.
- 碳来源显著影响MBR性能,特别是膜污染.
- 了解这些影响对于优化治疗过程至关重要.
研究的目的:
- 研究化学氧需求 (COD) 度对A/O-MBR和A/A-MBR系统中脱,除和膜污染的影响.
- 在不同的COD负载下分析微生物群落特征.
- 确定导致膜污染的关键因素.
主要方法:
- 两种COD度 (200和120 mg/L) 在无氧/有氧 (A/O-MBR) 和无氧/无氧 (A/A-MBR) 配置中的比较.
- 监测去除效率,膜过性能 (污染指数,流量下降) 和细胞外聚合物质 (EPS) 生产.
- 使用16S rRNA高通量测序对微生物社区结构的分析.
主要成果:
- 较高的COD (200 mg/L) 降低了去除效率,增加了EPS产量,膜污染指数 (FI) 和流量下降率.
- 在较高的COD下,A/A-MBR显示去除效率低于A/O-MBR.
- 在FI和EPS特性 (相对疏水性,蛋白质含量,Zeta潜力) 之间发现了强烈的相关性,表明EPS是主要的污染驱动因素.
- 与A/A-MBR相比,A/O-MBR证明了脱细菌的丰富性更强.
结论:
- 优化COD度对于减轻膜污染和提高MBR整体性能至关重要.
- EPS特征是关键指标,并有助于膜污染.
- 在特定的操作条件下,A/O-MBR配置可能更有利于营养物质的去除和微生物群落管理.
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