氧胺对anammox颗粒污泥的一个被忽视的作用:促进颗粒化和增强活性
Xinwei Su1, Jianwei Li1, Yi Peng2
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
外源性氧胺剂量显著增加了anammox细菌的活动和废水处理中的去除. 这一策略增强了颗粒型污泥的形成和微生物社区结构,以提高反应器的性能.
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:
- 亚纳莫克斯细菌对于废水处理中的去除至关重要.
- 亚酸盐的可用性是影响anammox细菌性能的一个关键因素.
- 外源氧胺已被探索为一种增加酸盐供应的方法.
研究的目的:
- 为了研究外源性氧胺剂量对anammox颗粒污泥的长期影响.
- 评估氧胺对反应堆性能和微生物社区动态的影响.
- 阐明氧胺对anammox过程的影响的潜在机制.
主要方法:
- 一个测序批量反应器被运行与外源性氧胺剂量.
- 监测了Anammox细菌活动和总去除率.
- 分析了细胞外聚合物 (EPS) 特性和微生物群体组成 (包括Candidatus Brocadia的丰富性).
- 用分子对接来理解相互作用机制.
主要成果:
- 氧胺剂量增加了从0.23到0.52公斤N/m3/d的总去除率.
- 细菌活动显著增加,从11.65到78.24毫克N/gVSS/h.
- 氧胺促进了颗粒化,增强了EPS,增加了Candidatus Brocadia的丰富性 (1.10%至3.03%),并加强了与异质菌的共生.
结论:
- 外源氧胺是一种有效的策略,可以提高anammox颗粒污泥的性能.
- 氧胺通过颗粒和微生物群落调节来提高去除效率和细菌活性.
- 这项研究为先进的废水处理中氧胺的应用提供了机械洞察力.
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