本文详细介绍了一种用于 评估是否安装低压膜 作为水处理厂扩建的一部分。 尽管莫德斯托的传统WTP （加利福尼亚）灌溉区（中部）超过了所有州 以及联邦水质要求 被要求切换到一种新的过滤技术 扩张。验证膜的适用性 而在性能方面，MID开始了广泛的应用 试点测试项目。它还评估了 残余物处理和膜清洗处理 浪费。 即使是运行良好的常规水处理 工厂有充分的理由用更新的设备进行扩张 技术，如低成本- 压力膜。对于 中期，预计区域人口增长和 用于未来水厂扩建的有限土地 扩大其常规业务的重要原因 用薄膜给植物浇水。 作者提供的信息将是 对面临自身待遇的公用事业管理者有用 通过提供一个 植物新技术的评价方法 膨胀水务公司可以看到中期进展如何 评估低压膜以及如何 做出了决定。他们还可以了解 臭氧、残余物处理的设计考虑， 以及膜清洗废物的处理。读者 也会对虹吸装置的使用感兴趣 为了使水通过膜，一个 有助于降低整体能源消耗的技术 在扩建的设施里。包括3个参考文献、表格、图表。

This article provides details of one approach for evaluating whether to install low-pressure membranes as part of a water treatment plant (WTP) expansion. Even though the conventional WTP at the Modesto (California) Irrigation District (MID) was exceeding all state and federal water quality requirements, the decision was made to switch to a new filtration technology for the expansion. To verify the membranes' applicability and performance, the MID embarked on an extensive pilot testing program. It also evaluated options for residuals handling and for treating membrane cleaning wastes. Even a well-operated conventional water treatment plant can have good reasons to expand with a newer technology, such as low-pressure membranes. For the MID, the anticipated regional population growth and limited land for future water plant expansions, were significant reasons for expanding its conventional water plant with membranes. The authors have presented information that will be useful for utility managers facing their own treatment plant expansions by providing an example of one approach to evaluating a new technology for a plant expansion. Water utilities can see how MID proceeded with evaluation of low-pressure membranes and how decisions were made. They can also learn about the design considerations for ozone, residuals handling, and disposal of membrane cleaning wastes. Readers will also be interested in the use of a siphon arrangement for drawing water through the membranes, a technique that will help to lower the overall energy use at the expanded facility. Includes 3 references, table, figures.