XIAOFeng,ZHENGDe-duo,WEIYue-hua,et al.Identification and Spatial Distribution Analysis of Membrane Fouling in Ultrafiltration Systems in a Drinking Water Treatment Plant[J].China Water & Wastewater,2025,41(15):47-54.
某水厂超滤膜污染物识别及空间分布特征解析
- Title:
- Identification and Spatial Distribution Analysis of Membrane Fouling in Ultrafiltration Systems in a Drinking Water Treatment Plant
- 摘要:
- 超滤膜污染行为与机制已得到广泛研究，但现有成果多聚焦于污染物时序变化规律及整体污染特性分析，对膜表面污染物的空间分布特征研究明显不足。为此，立足于水厂实际运行的超滤膜组件，通过对不同空间点位的膜污染物进行萃取，结合SEM、FTIR、XPS和EDS等原位表征技术，解析了超滤膜污染在膜组件三维空间的分布特征。结果表明，超滤膜污染主要是源于腐殖酸、多糖等有机物与Fe、Mn、Al等无机物形成的复合污染；污染物在膜组件纵向上呈现“进水断面>中间断面>出水断面”的分布规律，横向上呈现 “内层>中层>外层”的分布规律。基于此可优化超滤膜的清洗策略，并优化膜组件设计。
- Abstract:
- At present, the fouling behavior and mechanism of ultrafiltration（UF) membranes have been widely studied, but the existing achievements mostly focus on the temporal variation patterns of foulants and overall fouling characteristics, and the exploration of the spatial distribution features of foulants on membrane surfaces is obviously insufficient. This study investigated UF membrane modules operating in actual water treatment plants. By extracting and analyzing foulants from distinct spatial locations and employing in-situ characterization techniques such as SEM, FTIR, XPS, and EDS, the three-dimensional spatial distribution characteristics of UF membrane fouling within modules were comprehensively elucidated. Results indicated that UF membrane fouling primarily arose from composite contaminants formed by organic substances (e.g., humic acids, polysaccharides) and inorganic components (e.g., Fe, Mn, Al). The foulants exhibited distinct spatial distribution patterns: a longitudinal gradient of “inlet section>middle section>outlet section” and a transverse progression of “inner layer> middle layer>outer layer”. These findings offer technical insights for optimizing membrane cleaning strategies and establish a theoretical foundation for advanced membrane module design.
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