在不同方案下被动补氧对生物过-NF过程的影响
Sajid Rashid1, Lei Xu1, Mian Jawaduddin1
1State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Journal of environmental management
|December 20, 2025
概括
带有被动氧化的上游生物过显著改善了表面水处理的纳米过性能. 这种预处理增强了有机去除,减少了膜污染,并降低了消毒副产品形成潜力.
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:
- 纳米过 (NF) 膜对于表面水处理至关重要,但受到污染,缩放和流量下降的影响.
- 消毒副产品 (DBP) 的形成是水处理过程中的一个重要问题.
- 生物过 (BF) 是一种潜在的预处理方法,可以缓解NF的挑战.
研究的目的:
- 为了评估低速生物过的有效性与被动氧补充作为纳米过的预处理.
- 为了比较下流 (BFd) 和上流 (BFu) 生物过系统的性能.
- 评估生物过-纳米过整合对废水质量,膜污染和DBP形成的影响.
主要方法:
- 测试了两种生物过配置:下流 (BFd,氧-无毒) 和上流 (BFu,氧-无毒-氧).
- 这些系统与纳米过 (NF90和NF270膜) 集成.
- 评估的参数包括溶解有机碳 (DOC) 去除,流量减少,紫外线吸收,多糖和蛋白质含量,DBP形成潜力 (DBPFP) 和毒性.
主要成果:
- 由于生物降解的改善,上游生物过系统 (BFu) 实现了较高的DOC去除 (69%) 与下游 (BFd,65%) 相比.
- 与BFd-NF系统相比,BFu-NF系统的流量下降显著减少 (5.6-5.21%) 并减少了污染.
- BFu预处理显著降低了DBPFP (10-19%比BFd更多) 和毒性 (比BFd减少多达45%).
结论:
- 通过上流生物过 (BFu) 的被动氧补充对于提高NF性能比下流 (BFd) 更有效.
- 将BFu与NF集成显著改善水质,延长膜寿命,并最大限度地减少污染.
- BFu-NF组合为减少DBP形成潜力和表面水处理中的相关毒性提供了一种优越的策略.
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