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在花性污泥中竞争性丰富comammoxNitrospira

Jiaying Hou¹, Ying Zhu¹, Jinzhong Liu¹

¹College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China.

|January 21, 2024

概括

完全氧化氨 (comammox) 细菌在花性污泥中使用实验室规模的测序批量反应器进行了丰富. 这种缩提高了化效率,并减少了废水处理中的氧化和氧化排放量.

科学领域:

环境微生物学环境微生物学
污水处理污水处理污水处理
生物地质化学循环是什么

背景情况:

完全氧化 (comammox) 细菌挑战了对生物去除至关重要的传统的两步化模型.
在废水处理厂的花污泥中检测到comammox细菌,但丰富和表征的努力有限.
了解污泥中的comammox细菌对于优化去除过程至关重要.

研究的目的:

在受控条件下,在花污泥中丰富和描述comammox细菌.
调查康马莫克斯缩对化效率和温室气体排放的影响.
为了确定丰富的comammox细菌的动力参数.

主要方法:

实验室规模的测序批量反应堆 (SBR) 在步进养模式下运行,用于缩.
操作条件得到了优化:溶解氧 (0.5 ± 0.1 g-O2/m3),流入 (40 g-N/m3),延长了污泥保留时间.
在215天的时间里,监测了comammox细菌的丰富性,化效率以及N2O和NO的排放.

主要成果:

经过215天的运行,稳定的化效率达到了92.2±2.2%.
尼特罗斯皮拉 (comammox细菌) 的相对丰度显著增加 (42.9 ± 1.3%),超过了尼特罗斯莫纳斯的竞争力.
科马莫克斯细菌对 (3.296 ± 0.989 g-N/m3) 和氧 (0.110 ± 0.004 g-O2/m3) 的表面亲和度常数较低,N2O和NO排放因子较低 (分别为0.136 ± 0.026%和0.023 ± 0.013%).

结论:

在特定的SBR条件下,可以在花污泥中丰富comammox细菌,特别是Clade A Candidatus Nitrospira nitrosa.
丰富的comammox社区提高了化效率,并在废水处理过程中显著减少温室气体排放 (N2O和NO).
这些发现为优化去除过程提供了宝贵的见解,通过利用污泥系统中的comammox细菌的能力来优化去除过程.

关键词:

完全氧化氨 (comammox) 的方法叶片式污泥叶片式污泥叶片式污泥氧化 (N(2) O) 是一种氧化.序列化批量反应堆 (SBR) 的使用

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