对反应堆中颗粒形成的新洞察力,用于增强生物去除
Anna Pelevina1, Evgeny Gruzdev2, Yulia Berestovskaya1
1Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia.
Frontiers in microbiology
|January 1, 2024
概括
研究了活性污泥中的颗粒形成,发现了两种不同的聚合物类型. 形态型I,富含酸盐积聚生物 (PAO),主导,增强生物去除.
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
- 生物技术是生物技术.
背景情况:
- 颗粒活性污泥提供高生产率,但其形成机制尚未完全理解.
- 增强的生物去除 (EBPR) 过程对于废水中的营养管理至关重要.
- 微生物社区的动态在废水处理系统的稳定性和效率方面发挥着关键作用.
研究的目的:
- 在测序批量反应堆 (SBR) 中研究颗粒形成和微生物群落继承的过程.
- 了解不同微生物群体,特别是酸盐积聚生物 (PAO) 和糖积聚生物 (GAO) 在颗粒发育中的作用.
- 为了将颗粒形态和微生物组成与增强生物去除 (EBPR) 的效率相关联.
主要方法:
- 在EBPR条件下进行实验室规模测序批量反应器 (SBR) 培养.
- 微生物和分子技术,包括元基因组分析,以表征微生物群落.
- 监测乙酸摄取和释放以评估PAO活性.
主要成果:
- 两个不同的颗粒状聚合物类型 (形态型I和II) 自发形成.
- 形态型I聚合物由PAO主导,并且与有效的去除有关.
- 随着时间的推移,富含GAO的II型形态聚合物被淘汰,导致社区偏好I型形态和增加PAO丰度.
结论:
- 颗粒形成与特定微生物群落的选择和继承有关,有利于PAO主导的聚合物有效的EBPR.
- 该研究确定了关键的PAO属 (例如, *Candidatus* Accumulibacter) 和参与颗粒形成的潜在贡献细菌.
- 了解这些微生物的动态,为优化生物废水处理过程提供了洞察力.
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