间歇性和连续性通风模式对主流化工艺的性能,基质动态和微生物生态的影响
Ariane Coelho Brotto1, Halil Kurt1, Kartik Chandran1
1Department of Earth and Environmental Engineering, Columbia University, NY, NY, 10027, USA.
Water research
|July 4, 2025
概括
与连续通风相比,间歇性通风显著改善了废水处理中的氨氧化和化细菌的丰富性. 这一策略增强了生物去除过程.
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
- 生物地质化学循环是什么
背景情况:
- 化是生物去除的关键过程,对于废水处理至关重要.
- 空气化策略和固体保留时间 (SRT) 显著影响化性能和微生物生态.
- 了解这些影响对于优化废水处理厂效率至关重要.
研究的目的:
- 为了比较间歇性和持续性通风对主流化性能和微生物群落结构的影响.
- 在不同的空气化策略下评估不同固体保留时间 (SRT) 的影响.
- 在测试条件下识别主导氨氧化细菌 (AOB) 和酸盐氧化细菌 (NOB).
主要方法:
- 使用了两个实验室规模的反应器 (R1和R2) 具有相同的注射剂.
- 在R1中实施间歇性通风,在R2中以相似的空气供应速率进行持续的低通风.
- 在三个阶段逐渐减少SRT从8天到4天和2.5天.
- 分析了氨氧化效率和微生物群体组成 (AOB,NOB,Comammox Nitrospira).
主要成果:
- 反应堆R1 (间歇空气) 实现了比R2 (93 ± 4.8%) 的更高和更稳定的氨氧化 (99 ± 0.13%) .
- R1显示出主导的Nitrosospira AOB,而R2显示出Nitrosospira和Nitrosomonas的混合物.
- 尼托斯皮拉是两个反应堆中占主导地位的NOB;R1具有更高的相对丰度的ComammoxNitrospira.
- 细菌丰富模式受到动力学以外的因素的影响,包括注射剂和氧/度.
结论:
- 间歇性通风是提高化效率和在废水处理中促进有益的微生物群落的优越策略.
- 空气化策略的选择影响了占主导地位的氨氧化细菌种群.
- 间歇性通风支持更丰富的ComammoxNitrospira,这表明对去除的潜在好处.
- 除了微生物动力学之外的操作因素,例如注射剂和环境条件,在化细菌的丰富中发挥着重要作用.
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