热冲击和持续热处理对主流部分化和微生物群体在批量反应堆测序中的影响
Niema Afroze1, Mingu Kim2, Mohammad M I Chowdhury3
1Department of Civil and Environmental Engineering, University of Western Ontario, London, ON, N6A 5B9, Canada. nafroze@uwo.ca.
Environmental science and pollution research international
|December 26, 2023
概括
这项研究探讨了热冲击.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理 废水处理
背景情况:
- 实现快速化对于有效的生物去除至关重要.
- 传统的方法往往难以保持稳定性,需要特定的条件.
- 了解热冲击对微生物群落的影响是优化化过程的关键.
研究的目的:
- 评估热冲击对排序批次反应堆 (SBR) 酸盐积累的影响.
- 调查间歇性的线下和连续的线内热处理方法.
- 为了确定在主流废水处理中实现部分化 (PN) 的最佳温度.
主要方法:
- 使用7天固体保留时间的市政废水和不同的加载率运行SBR.
- 对生物质进行间歇性的离线热处理 (47°C2小时) 和连续的内线热处理 (37°C和42°C).
- 监测酸盐积累比率 (NAR) 和微生物社区动态 (Nitrosomonas和Nitrospira的主导地位).
主要成果:
- 在低于之前报告的温度 (37°C和42°C) 观察到暂时化物积累.
- 在42°C的连续加热产生了最高的NAR (0.79),而在47°C的间歇加热产生了0.37.
- 在加热反应器中,尼特罗斯皮拉对尼特罗斯莫纳斯的支配性增加,这表明它可能在comammox化中发挥作用.
结论:
- 回归活性污泥 (RAS) 的热处理为主流部分化提供了一个有希望的策略.
- 在较低的温度下 (例如42°C) 通过有针对性的热应用,可以实现PN.
- 进一步研究Nitrospira在高温下作为comammox细菌的作用是有必要的,以加强去除.
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