这篇论文探讨了环境工作的顺序 在工厂内安装1400万加仑/天（mgd）低压膜工艺（超滤）时解决 现有水处理厂（WTP）设施。为了说明这些考虑，本文回顾了 在伊利诺伊州森林湖市对现有水处理厂进行修复。 森林湖城市水处理厂是一种12 mgd的传统颗粒介质过滤工艺，使用密歇根湖作为过滤介质 原水供应。森林湖市担心水处理厂满足现有和未来用水的能力 设计能力的质量标准，并在受限制的场地范围内扩大其能力。 因此 森林湖市决定继续修复现有设施。 在对工艺处理替代方案和现场限制进行审查后，低压膜似乎是一种解决方案 可行的替代方案。因此，森林湖市决定着手设计一个新的低压管道 膜过滤大楼。 为了尽可能缩短项目进度，设计阶段的第一步是选择低压膜 系统除了通常用于膜选择的标准，如全面经验，膜 与工艺化学品、膜认证、操作模式和完整性测试的兼容性 必须审查和评估特定于现场的安装标准。 在膜选择过程中提出的主要问题是在压力驱动系统和压力驱动系统之间进行选择 水下系统。评估了以下标准: 膜系统能耗； 将新膜系统安装到现有滤池中； 施工期间现有处理工艺的运行； 将新结构的环境影响降至最低； 现有建筑和新建筑之间的楼层标高匹配； 最大限度地重复利用现有盆地； 保护未来；和 当前价值分析。 最后，选择了一个压力驱动系统，以匹配湖泊森林城市的具体约束条件。越来越多 越来越多的公用事业公司正在认真考虑修复其现有的低成本设施- 压力膜。 选择满足现场和操作限制的膜系统类型是成功运行的关键 康复项目。由于每个地点都是独特的，一项研究的结果不能推广到其他地点。然而 同样的方法可以在多个站点上使用。包括2个参考文献和表格。

This paper explores the environmental, structural, work sequence, and operation considerations that have to be addressed when installing a 14 million gallons per day (mgd) low-pressure membrane process (ultrafiltration) within an existing water treatment plant (WTP) facility. To illustrate these considerations, the paper reviews the design that was performed for the rehabilitation of the existing WTP at the City of Lake Forest, Illinois. The City of Lake Forest WTP is a 12-mgd conventional granular media filtration process that uses Lake Michigan as raw water supply. The City of Lake Forest had concerns about the WTP's ability to meet existing and future water quality standards at its design capacity and to expand its capacity within the limits of the constrained site. Therefore, the City of Lake Forest decided to proceed with the rehabilitation of the existing facility. After review of the process treatment alternatives and the site constraints, low-pressure membranes appeared to be a viable alternative. Therefore, the City of Lake Forest decided to proceed with the design of a new low-pressure membrane filtration building. In order to minimize the project schedule, the first step of the design phase was to select the low-pressure membrane system. In addition to the criteria typically used for membrane selection such as full-scale experience, membrane compatibility with process chemicals, membrane certification, operation mode, and integrity testing, it appeared that installation criteria specific to the site had to be reviewed and evaluated. The main question raised during the membrane selection process was choosing between a pressure-driven system and a submerged system. The following criteria were evaluated: membrane system energy cost; installation of the new membrane system into the existing filter cells; operation of the existing treatment process during construction; minimal environmental impact of the new structure; match floor elevation between existing building and new building; maximize re-use of the existing basins; preserve the future; and, present worth analysis. Finally, a pressure-driven system was selected to match the specific constraints of the City of Lake Forest. More and more utilities are seriously considering rehabilitation of their existing facility with low-pressure membrane. Selecting the type of membrane system that addresses site and operation constraints is the key to a successful rehabilitation project. As each site is unique, the results of one study cannot be generalized for other sites. However, the same approach can be used on multiple sites. Includes 2 references, tables.