尽管大多数薄膜水处理厂符合设计规范，苏伊士- 环境（SE）经验表明，给水的污染倾向不是系统性的 这可能会限制工厂的产量，并提供不充分的最终水质。因此 需要进一步调查预处理工艺或操作程序，以防止膜污染 污染被确定为SE感兴趣的一个领域，SE必须在许多方面面对这个问题 植物。在这种情况下，该项目的目标是评估提高系统可靠性的方法 各种给水的现有超滤（UF）膜水处理设施的运行。 这个项目 包括常规预处理的评估，包括澄清步骤和在线预处理 混凝以减少污染物，并保证合适的最终水质。一体化 包括混凝、沉淀和超滤在内的工艺证实了整体性能的显著改善 膜工艺的性能，尽管遇到了一些膜堵塞和 变老使用小剂量的凝固剂直接注入膜上游，这是一项获得专利的工艺 Degremont称之为“微混凝”，这也是一种有效的方法来控制来自 溶解的有机化合物和较低的水温。 然而，天然有机污染物的去除率较低 整个过程中的物质可能会限制在需要消毒的水中使用微凝聚 副产品是一个问题。包括9个参考文献、表格、图表。

Although the majority of the membrane WTWs comply with the design specifications, Suez- Environnement (SE) experience indicates that the fouling propensity of the feed water is not systemically well determined, which can limit the plant output and provides inadequate final water quality. Thus, the need for further investigation of pretreatment processes or operational procedure to prevent membrane fouling was identified as an area of interest for SE, which has to face this issue at a number of membrane plants. In that context, the objective of the project was to assess methods to improve the reliability for the operation of existing ultrafiltration (UF) membrane water treatment facilities for various feed waters. This project included the assessment of conventional pretreatment consisting of a clarification step and in-line coagulation to reduce foulant contaminant and guarantee suitable final water quality. The integrated process including coagulation, settling and UF confirmed a significant improvement of the overall performances of the membrane process albeit some difficulties encountered with membrane clogging and ageing. The use of small doses of coagulant directly injected upstream the membrane, a process patented by Degremont and called "Micro-coagulation", appeared also as an effective way to control fouling from dissolved organic compounds and low water temperature. However, low removal of natural organic matter throughout the process may limit the use of the micro-coagulation on water where disinfection byproducts are an issue. Includes 9 references, tables, figures.