细胞外聚合物和微生物群落在单阶段部分化/亚纳摩克斯工艺启动时发生变化
Yan Men1,2, Lingjie Liu1,2, Shaopo Wang1,2
1School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China.
概括
在测序批量反应堆 (SBR) 中间歇性通风成功启动了单阶段部分化/anammox (SPN/A) 过程. 细胞外聚合物 (EPS) 和微生物群落的转移是稳定的去除和污泥颗粒化的关键.
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
- 生物地质化学生物地质化学
背景情况:
- 单阶段部分化/亚纳摩克斯 (SPN/A) 工艺是一种高效的去除技术.
- 了解启动动态,包括微生物社区和细胞外聚合物质 (EPS) 变异,对于流程优化至关重要.
- 间歇性通风是提高SPN/A性能的一种潜在策略.
研究的目的:
- 在间歇性通风下启动SPN/A工艺期间调查EPS和微生物群体的变化.
- 探索EPS组成,蛋白质二次结构和污泥聚合之间的关系.
- 在SPN/A启动过程中识别关键微生物参与者及其与EPS的相关性.
主要方法:
- 在间歇性通风模式下运行测序批量反应堆 (SBR).
- 监测去除效率和加载速度.
- 细胞外聚合物物质 (EPS) 组成和蛋白质二次结构的分析.
- 使用分子技术进行微生物社区分析.
- 污泥聚合性质的表征.
主要成果:
- 在34日,SPN/A系统成功启动,除效率为82.29%,负载率为0.31kgN/m3·day).
- 在α-螺旋/β-片 + 随机线圈) 比率的显著增加 (从0.20到0.23) 与增强的污泥聚合 (从56到107微米) 相相关.
- 鉴定出Candidatus Kuenenia和Nitrospira分别是主导的氧和酸盐氧化细菌,在启动过程中观察到的变化.
结论:
- 间歇性通风有效地促进了SPN/A过程的启动.
- EPS的组成,特别是蛋白质的二次结构,在污泥聚合和稳定性中起着至关重要的作用.
- 微生物群落转移和EPS之间的相互作用对于在SPN/A系统中实现稳定的去除和污泥颗粒化至关重要.
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