污泥大小会影响有机微污染物的吸收,在大型有氧颗粒污泥系统中
Zhaolu Feng1, Heike Schmitt2, Mark C M van Loosdrecht3
1Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA Wageningen, the Netherlands.
Water research
|October 8, 2024
概括
有氧颗粒污泥 (AGS) 通过吸附有效地去除有机微污染物 (OMP),较大的颗粒显示出更高的容量. 这项研究强调了AGS作为废水处理的有希望的替代品,改善了OMP的去除.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 水处理技术水处理技术
背景情况:
- 有氧颗粒污泥 (AGS) 越来越多地被用于废水处理.
- 关于通过AGS吸附去除有机微污染物 (OMP) 的数据有限.
- 了解AGS中的OMP吸附机制对于优化治疗至关重要.
研究的目的:
- 为了研究不同AGS大小分数中的24个OMP的吸附行为.
- 为了确定颗粒大小对OMP吸附能力和动力学的影响.
- 为了比较AGS中的OMP吸附与传统的活性污泥系统.
主要方法:
- 批量实验是使用6个AGS大小小部分从一个全尺寸反应堆进行的.
- 在环境相关度 (1μg/L) 上研究了24种OMP.
- 分析了吸附系数,容量和平衡时间.
主要成果:
- 对于10种OMP,特别是zwitterionic和正电荷药物,观察到显著的吸附 (>40%的去除).
- 较大的AGS分数 (>2毫米) 显示出更高的吸附系数和容量.
- 对于较大的颗粒,在72小时后达到吸附平衡,这表明扩散限制.
- AGS显示了与活性污泥相比,OMP吸附能力相当或略高.
结论:
- 静电相互作用在OMP吸附到AGS中起着关键作用.
- 颗粒大小显著影响AGS系统中的OMP吸附效率和动力学.
- 在废水处理中,AGS为OMP清除活性污泥提供了一种可行且潜在的优质替代方案.
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