实施微滤（MF）/超滤（UF）膜的一个重要方面是 预处理要求是将设备或设备改造成现有设备。一般来说 对于低浊度水，如果不需要去除溶解物质，可接受MF/UF 膜可用于过滤水源水，只需最少的预处理，例如 预筛选。对于高浊度的水源水，预处理通常是可取的 它提高了MF/UF膜的性能，从而降低了寿命周期成本。 这个 这种水的预处理可以是混凝，也可以不沉淀，具体取决于水的性质 水质。然而，对于以中等浊度为特征的水质，很少进行研究 有助于确定膜性能的改善是否与 预处理可以证明预处理的成本是合理的。本文讨论了这个问题，并提出了一个解决方案 公用事业公司在确定提高发电能力的成本效益方法方面的经验 现有装置，并使用MF/UF膜过滤改善水质。包括表格、数字。

One of the important aspects of implementation of microfiltration (MF)/ultrafiltration (UF) membranes, either for a new plant or for retrofitting them into an existing plant, is the pretreatment requirement. It is generally accepted that for low turbidity waters and, if removal of dissolved materials is not required, MF/UF membranes could be used for filtration of source water with minimal pretreatment such as a prescreen. For source water characterized by high turbidity, pretreatment is typically desirable as it improves the performance of the MF/UF membranes thereby reducing the life cycle costs. The pretreatment for such water could be coagulation with or without sedimentation depending on the water quality. However, for water quality characterized by moderate turbidity, few studies are available to help determine whether the improvement in the performance of the membranes with pretreatment would justify the cost of pretreatment. This paper addresses this issue and one utility's experience in determining the cost-effective approach in increasing the capacity of an existing plant and improving the water quality using MF/UF membrane filtration. Includes tables, figures.