污水处理厂初步设计的最后一步是制定工厂布局。在设计过程的这一阶段，已经选定了场地，确定了处理工艺，并且通常已经确定了工艺装置的大致尺寸。然后工程师必须在现场安排工艺。有许多可供选择的基本工厂布局。所选的特定电厂布局会对施工成本、水力、电厂性能、运行和维护（O＆M）以及扩建的便利性产生重大影响。这篇文章描述了一个紧凑的工厂布局，它简化了操作和维护，并将施工成本降至最低。包括6个参考文献、表格、图表。

One of the last steps in the preliminary design of a treatment plant is to develop the plant layout. By this stage of the design process, the site has been selected, the treatment processes have been identified, and the approximate dimensions of the process units have normally been established. The engineer then must arrange the process units on the site. There are a number of alternative basic plant layouts. The particular plant layout selected can have a significant effect on construction cost, hydraulics, plant performance, operation and maintenance (O&M), and ease of expansion. This article describes a compact plant layout that simplifies O&M and minimizes construction cost. Includes 6 references, table, figures.