低压中空纤维（LPHF）膜容易受到天然有机物的污染 自然水过滤过程中的物质（NOM）。探讨了污垢的机理 在AWWARF资助的一项实验室规模研究中，使用了具有代表性的LPHF膜 和天然水样，再加上用于描述污染物特征的补充技术。 使用称为“统一修正污垢”的新概念对污垢结果进行量化 指数（UMFI）”。发现膜污染受多种因素影响，包括 NOM的高分子量（HMW）部分的存在。污垢的大小为 比过滤的流体动力学条件更具体地针对每种膜/水组合； UMFI的分析表明，观察到的污垢通常遵循伪滤饼 污垢的形成类型，指数在0.0027～0.034 m之间 如果选择合适的膜进行清洗，反洗可以有效地去除污垢 特定水源。本研究的结果为膜最终用户提供了更多 通过以下方法有效评估其水污染特定膜的可能性: 使用开发的UFMI。此外，它还提出了可能影响 天然有机物对其膜的污染。包括6个参考文献、表格和图。

Low pressure, hollow fiber (LPHF) membranes are subject to fouling by natural organic matter (NOM) during the filtration of natural waters. The mechanisms of fouling were explored in an AWWARF-funded study at bench scale using representative types of LPHF membranes and natural water samples, coupled with complimentary techniques for foulant characterization. The fouling results were quantified using the new concept called the "unified modified fouling index (UMFI)". It was found that membrane fouling is affected by multiple factors, including the presence of the high molecular weight (HMW) fraction of NOM. The magnitude of fouling was more specific to each membrane/water combination, than hydrodynamic conditions of filtration; The analysis of UMFI suggested that the observed fouling usually followed a pseudo-cake formation type of fouling, with the indices varying between 0.0027~0.034 m²/L. Hydraulic backwashing was shown to effectively remove fouling if the proper membranes were chosen for a specific source water. The results from this study offer the membrane end user a more efficacious manner to evaluate the potential of their water to foul specific membranes by employing the developed UFMI. Moreover, it suggests important factors that may influence the fouling of their membranes by natural organic matter. Includes 6 references, tables, figures.