离子混合模式控制膜污染缓解在膜基恢复细胞外聚合物质的过程中
Da-Qi Cao1,2, Yi-Xuan Song1,2, Yun-Feng Wu1,2
1Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
Membranes
|June 25, 2025
概括
(Ca2+) 添加策略在细胞外聚合物 (EPS) 超过程中显著影响膜污染. 混合模式决定了Ca2+-EPS相互作用,影响了体结构和过阻力,以有效处理废水.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 膜科学 膜科学 膜科学
背景情况:
- 从废水污泥中回收细胞外聚合物 (EPS) 是非常重要的.
- 膜分离对EPS度有希望,但膜污染是一个主要障碍.
- (Ca2+) 的添加已知可以减轻膜污染.
研究的目的:
- 调查Ca2+混合模式如何影响EPS的死胡同超过程中膜污染.
- 在不同的混合条件下阐明Ca2+和EPS之间的相互作用机制.
- 了解这些相互作用对过性能的影响.
主要方法:
- 使用实际EPS和模型EPS (藻酸盐) 的死结超试验.
- 在不同的混合序列下对Ca2+-EPS相互作用进行系统的研究 (EPS-Ca与Ca-EPS).
- 对体颗粒大小,蛋糕层结构和过阻力的分析.
主要成果:
- 在较低的Ca2+度下,混合模式极大地影响了合体大小和蛋糕结构,影响了过阻力.
- 通过封装,EPS-Ca方法减少了自由的EPS和扩大的聚合物,降低了膜污垢.
- 在Ca-EPS方法形成更密集,交叉连接的结构与较小的合物,加剧污染.
结论:
- 在EPS超过过程中,Ca2+混合模式是膜污染的关键决定因素.
- 通过改变EPS聚合和封装,EPS-Ca添加策略有效地减少了EPS介导的膜污染.
- 优化Ca2+添加策略是减轻EPS度过程中膜污染的关键.
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