在花污泥反应堆中对完全氧化细菌的比较丰富:测序批量反应堆与连续水箱反应堆的比较
Ying Zhu1, Jiaying Hou1, Fangang Meng2
1College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, PR China.
Water research X
|February 10, 2025
概括
连续水箱反应堆 (CSTRs) 通过保持低水平,有效地丰富了完全氧化 (comammox) 细菌,而不是氧化细菌 (AOB). 这一发现有助于开发使用comammox细菌的可持续废水处理技术.
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
- 生物地质化学循环的过程
背景情况:
- 完全氧化 (comammox) 细菌与Nitrospira相关,提供了一条不产生氧化 (N2O) 的去除的途径.
- 了解comammox细菌丰富的最佳条件对于推动可持续的废水处理至关重要.
- 氨氧化细菌 (AOB) 通常在传统的废水处理系统中占主导地位.
研究的目的:
- 为了比较comammox细菌在测序批量反应堆 (SBR) 和连续水箱反应堆 (CSTR) 中的丰富.
- 研究反应器配置对comammox细菌和AOB之间的竞争优势的影响.
- 在常规废水氨气条件下评估化性能和微生物群体动态.
主要方法:
- 运行了216天的SBR和CSTR系统,主要的废水含有氨度.
- 进行微生物分析以识别和量化comammox细菌和AOB.
- 进行了专门的批量测试,以确定Nitrospira主导和Nitrosomonas主导污泥的动力参数 (氧化率,和氧 afinity).
主要成果:
- 与SBR (1.0-6.0 g-N/m3) 相比,CSTR保持了较低的现场氨水平 (<2.0 g-N/m3),有利于comammox细菌.
- 尼特洛斯皮拉占主导地位的污泥比尼特洛索马斯占主导地位的污泥显示出较低的最大氧化率和较低的和氧亲和常数.
- 科马莫克斯细菌表现出K-战略家的特征,在寡量化条件下壮成长.
结论:
- 与SBR相比,CSTR配置在花污泥中丰富comammox细菌方面更有效.
- 低度对于建立comammox细菌在AOB上的竞争优势至关重要.
- 这项研究提供了对comammox-AOB相互作用的见解,支持开发包括comammox在内的生物去除技术.
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