在季节性冷却下,在无氧/有氧/无毒系统中提升了提升的除:在可切换单元中提高了anammox性能
You Wu1, Hanbin Wang1, Xialian Shi1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Bioresource technology
|December 10, 2025
概括
低温对废水处理构成了挑战. 通过切换到有氧条件来调整无氧/有氧/无氧 (AOA) 过程,维持了高去除效率,证明了它在较冷的气候中具有可行性.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水工程 废水工程
背景情况:
- 在低温下无氧/有氧/无氧 (AOA) 过程的性能尚不清楚.
- 温带地区的废水处理因季节性温度波动而面临挑战.
研究的目的:
- 在温度下降 (27.8至15.9°C) 条件下研究连续流动AOA系统的稳定性.
- 评估运营调整对去除效率和微生物群落动态的影响.
主要方法:
- 一个连续流动的AOA系统与市政废水一起运行.
- 系统地降低了温度,并将4号机组从无氧转换为低于22°C的有氧条件.
- 分析了去除效率,废水中含量,生物膜生物质,基因转录和微生物群落.
主要成果:
- 该系统在24.7°C时实现了94%的去除效率.
- 将4号机组切换到低于22°C的有氧条件下,保持了87%的去除效率.
- 这种操作变化增加了生物膜生物质量,并增强了关键的anammox基因转录,尽管anammox丰度下降了.
结论:
- 通过改善酸盐的可用性和基因表达的支持,双通道的阿纳莫克斯证明了在温带气候下进行主流废水处理的可行性.
- 操作灵活性,如切换到有氧条件,对于在寒冷条件下保持去除效率至关重要.
- 耐氧的亚纳莫克斯细菌,比如Ca. 布罗卡迪亚在较低温度下对系统稳定性起着重要作用.
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