肯纳威克市的水过滤厂（WFP）改进项目， 华盛顿开始确定需要的改进以满足该市的需求 预期饮用水质量和容量需求。淹没低压 膜为扩大粮食计划署提供了一个成本效益高的“无具体”解决方案，该解决方案 在夏季处理哥伦比亚河水，以满足峰值系统需求。这 每天750万加仑（mgd）工厂包括臭氧、快速混合、絮凝、， 沉淀、介质过滤和氯消毒。本文的重点是 用于实现这一独特功能的方法和关键考虑因素 膜改造项目。 尽管压力膜系统可用于改造传统水厂， 浸没式膜技术更适合Kennewick的需要。Zenon和 美净公司/Memcor是水下膜系统的两大供应商 饮用水。每个供应商的系统设计和最终设计都不同 取决于所选系统。 膜系统采购至关重要，并建立公平和抗议证明 投标环境至关重要。膜的标准和试验条件 考虑到这一点，进行了初步测试。 与每个供应商进行了仔细协调 需要了解每个系统的过滤厂房改造要求。一些 影响过滤厂房改造的系统设计参数的具体示例如下: 膜池深度、桥式起重机/提升机容量和 并将渗透泵定位在膜槽附近。包括4个参考文献、表格和图。

The Water Filtration Plant (WFP) Improvements Project for the City of Kennewick, Washington was initiated to determine the improvements needed to meet the City's anticipated potable water quality and capacity needs. Submerged low-pressure membranes offer a cost-effective "No Concrete" solution to expanding the WFP, which treats Columbia River water in the summertime to supply peak system demands. This 7.5-million-gallons per-day (mgd) plant includes ozone, rapid mix, flocculation, sedimentation, media filtration, and chlorine disinfection. This paper focuses on the approach and key considerations utilized to implement this unique submerged membrane retrofit project. Although pressure membrane systems can be used to retrofit conventional water plants, submerged membrane technology was better suited for Kennewick's needs. Zenon and USFilter/Memcor are the two major suppliers of submerged membrane systems for drinking water. The system designs are different for each supplier and final design depends on the selected system. Membrane system procurement is critical and establishing a fair and protest-proof bidding environment is essential. The criteria for and test conditions of the membrane pilot testing were developed with this in mind. Careful coordination with each vendor was required to understand the filter building retrofit requirements for each system. Some specific examples of system design parameters that impact the filter building retrofit are: membrane basin depth, overhead crane/hoist capacity and lifting height for the membranes, and locating the permeate pumps adjacent to the membrane tanks. Includes 4 references, tables, figures.