在不同的生物转化条件下,有氧颗粒污泥中有机微污染物的颗粒大小依赖的生物转化
Zhaolu Feng1, Silvana Quiton Tapia1, Froukje van Hees1
1Environmental Technology, Wageningen University and Research, P.O. Box 17, Wageningen 6700 AA, The Netherlands.
Journal of hazardous materials
|February 7, 2026
概括
较小的有氧颗粒污泥 (AGS) 分数在有氧条件下增强有机微污染物 (OMP) 的去除. 优化AGS颗粒大小可以提高废水处理效率,减少OMP产生的生态风险.
科学领域:
- 环境微生物学 环境微生物学
- 水处理工程水处理工程
- 生物地质化学生物地质化学
背景情况:
- 有机微污染物 (OMP) 在废水中普遍存在,并且由于传统处理不完全去除,造成生态风险.
- 有氧颗粒污泥 (AGS) 为OMP清除提供了一个有前途的替代方案,但不同颗粒大小的作用尚不清楚.
- 微生物生物转化是废水处理系统中OMP去除的主要机制.
研究的目的:
- 为了研究23个OMP的不同有氧颗粒污泥 (AGS) 尺寸分量的生物转化潜力.
- 在有氧异构,化和非化条件下,在环境相关度下评估OMP生物转化.
- 了解AGS颗粒大小和微生物活动对OMP去除效率的影响.
主要方法:
- 从一个全尺寸的AGS工厂收集了六个不同的AGS尺寸分数 (<0.2毫米,0.21毫米,>1毫米).
- 进行了批量微观实验,以评估23种OMP在各种微生物条件下的生物转化 (有氧异质,化,脱化).
- 生物转化率 (Kbio) 为每个OMP在不同的AGS大小分数和条件中确定.
主要成果:
- 包括制药和工业化合物在内的8种OMP在至少一个测试条件下表现出10%以上的生物转化.
- 较小的AGS分数显示出更高的有氧生物转化率,与增加的化剂和有氧异质基活性相关.
- 在脱条件下,观察到OMP生物转化,但与脱活动没有明显的相关性,可能是由于微生物分布异质.
结论:
- AGS颗粒大小显著影响OMP生物转化,较小的部分在有氧条件下更活跃.
- AGS的整体生物转化速率略低于活性污泥,这是由于实体反应堆中较小,高度活性颗粒的比例有限.
- 优化AGS颗粒大小分布和了解微生物群落动态对于增强OMP去除和减轻环境影响至关重要.
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