颗粒和在有氧颗粒污泥工艺中的不同作用
Ling-Hang Li1, Martin Pabst1, Mark C M van Loosdrecht1
1Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, the Netherlands.
Water research
|October 9, 2025
概括
有氧粒状泥 (AGS) 系统从颗粒和的混合物中获益. 不同的大小的污泥在去除营养物质方面发挥着不同的作用,较大的颗粒在吸收和脱方面表现出色,而较小的和颗粒则是化的关键.
科学领域:
- 环境生物技术 环境生物技术
- 废水处理工程 废水处理工程
- 微生物生态学 微生物生态学
背景情况:
- 有氧颗粒性泥 (AGS) 是废水处理的一种经过验证的技术,但这些系统中的颗粒和的独特功能尚未完全理解.
- 全面的市政AGS反应堆通常具有颗粒性污泥和花式污泥,需要研究它们的差异性贡献.
研究的目的:
- 在模拟的AGS系统中调查不同污泥大小分数 (,小,中,大颗粒) 在营养去除中的特定作用.
- 为了比较微生物群落和代谢活动在这些尺寸部分,以了解他们的功能专业化.
主要方法:
- 实验室规模的AGS反应堆与合成废水的运行,以实现颗粒和的共存.
- 评估碳,和去除效率,使用分离的污泥部分的批量实验.
- 微生物社区分析通过metagenomics和metaproteomics跨不同的尺寸分数.
主要成果:
- 较大的颗粒 (中型和大型) 显示出更高的基质吸收,去除和脱能力.
- 叶片和小颗粒呈现出更高的生物质特异性化率,但受到较大颗粒中的氧气质量转移的限制.
- 确定了不同的微生物群落:颗粒富含PAO (Candidatus Accumulibacter) 和GAO (Candidatus Competibacter),而花则拥有更多的AOB (Nitrosomonas) 和发酵PAO (Tetrasphaera).
结论:
- 实验室AGS反应器有效模拟了全尺寸系统,展示了颗粒和的不同功能作用.
- 在AGS中优化营养物质的去除需要各种颗粒大小和的平衡组成.
- 这项研究为未来使用这种模拟系统对AGS优化进行研究提供了基础.
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