不同质的微观结构诱导了高速度的阿纳摩克斯颗粒中的浮动
Da Kang1, Huifeng Lu2, Tingting Kang2
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Department of Environmental Engineering, Beijing University of Technology, PR China.
Water research X
|March 3, 2025
概括
在废水处理中浮动的anamox颗粒 (F-AnGS) 是由密集的EPS层和异质的微观结构引起的. 这种结构增强了代谢相互作用和酸盐循环,尽管有气体释放问题.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 废水工程 废水工程
背景情况:
- 安纳莫克斯 (无氧氧化) 颗粒对于有效的废水处理至关重要.
- 颗粒浮动是一个重大的运营挑战,导致性能退化和生物质损失.
研究的目的:
- 为了研究anammox颗粒浮动背后的机制.
- 为了比较分析漂浮的阿纳莫克斯颗粒 (F-AnGS) 和沉的阿纳莫克斯颗粒 (S-AnGS).
主要方法:
- 来自高速反应堆的F-AnGS和S-AnGS的比较分析.
- 无氧呼吸计测量气体释放量.
- 3DX射线显微镜成像以揭示颗粒微观结构.
- 细胞外聚合物质 (EPS) 积累和分布的分析.
主要成果:
- 与S-AnGS相比,F-AnGS表现出比S-AnGS高1.6倍的特异性亚纳摩克斯活性.
- 由于密集的EPS表面层,F-AnGS只释放了65%的产生的气体.
- F-AnGS显示了一个异质的微观结构,与S-AnGS不同.
- 增加了与anammox相关的功能基因的丰富性和F-AnGS中的部分脱,表明增强了酸盐循环.
结论:
- 不同质的微观结构和EPS分布,形成密集的表面层,是anammox颗粒浮动的主要原因.
- F-AnGS独特的微观结构增强了微生物的代谢相互作用和酸盐循环.
- 研究结果表明,控制颗粒活性是优化基于颗粒的anammox工艺的关键.
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