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C/N对有氧颗粒污泥系统微生物相互作用的影响

Yan Huang¹, Junqi Zhang¹, Junyu Liu¹

¹Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

Journal of environmental management

|November 22, 2023

概括

在有氧颗粒污泥 (AGS) 系统中降低碳比 (C/N) 增加了微生物网络的复杂性和竞争,导致污染物去除和稳定性较差.

科学领域:

环境微生物学环境微生物学
废水处理技术废水处理技术
微生物生态学微生物生态学

背景情况:

有氧颗粒污泥 (AGS) 系统对于高效的废水处理至关重要.
运行参数,如碳 (C/N) 比率,显著影响AGS性能.
了解不同C/N比率下的微生物相互作用是优化治疗过程的关键.

研究的目的:

在降低C/N比率 (16,8和4) 的AGS系统中评估运行稳定性和微生物相互作用变化.
调查降低C/N对污染物清除效率和污泥沉特性的影响.
用分子生态网络分析分析微生物社区结构和网络复杂性的变化.

主要方法:

采用可控C/N比率的AGS系统的实验设置.
关键绩效指标的监测:总和总去除效率.
评估颗粒沉性能和运行稳定性.
分子生态网络分析以研究微生物社区结构和相互作用.

主要成果:

污染物去除效率显著下降,因为C/N比率从16降至4 (例如,总去除率从95.99%降至48.46%).
颗粒沉性能和系统稳定性随着C/N.降低而恶化.
降低的C/N比率导致了更复杂和更紧密的微生物网络,包括像Thiothrix和Defluviicoccus这样的主导属.

结论:

降低的C/N比率增加了微生物网络的复杂性和AGS系统中的物种间竞争.
这种增加的竞争和网络复杂性会对污染物清除效率和污泥稳定性产生负面影响.
分子生态网络分析为C/N比对AGS微生物群落的影响提供了宝贵的见解.

关键词:

有氧颗粒污泥的有氧颗粒污泥这是一个C/N比率.微生物社区的微生物社区.分子生态网络分子生态网络.

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