本文介绍了用于20 mgd浸没式发动机的创新设计概念 Westwater Chester联合污水处理厂的施工 工程（WJWW），位于纽约黑麦湖，提供水处理工艺的灵活性，同时 使工厂能够满足严格的消毒副产品（DBP）法规，并将运营成本降至最低。 黑麦湖的原水水质通常非常好，工厂设计允许 将水直接供给膜。或者，原水可以 在两用罐中的膜之前凝结和絮凝。 为了进行并列比较，提供了两种不同的膜系统 由供应商Zenon Membrane Solutions提供，ZW500d具有大直径纤维和低成本 填充密度和ZW1000具有更细的纤维和更高的填充密度。 为了提高性能，两种膜系统都使用槽定期去除固体 排水，而不是之前膜系统使用的“进料和排料”方法 小贩实施这种固体去除方法具有重要的设计意义 挑战。 为了降低总功耗，单独的渗透泵可以产生 膜的工作真空已被位于真空管中的虹吸管所取代 均衡水箱。少量高效的立式涡轮泵将水从 从湿井到净井。此外，膜池通过高效的通风系统进行通风 容积式鼓风机和这些鼓风机的控制系统包括两个 操作模式、空气循环和间歇空气操作。包括表格、数字。

This paper describes innovative design concepts used for the 20-mgd immersed membrane water treatment plant under construction for the Westchester Joint Water Works (WJWW), at Rye Lake, New York to afford water treatment process flexibility, while enabling the plant to meet stringent disinfection byproduct (DBP) regulations and minimize operational costs. Raw water quality from Rye Lake is typically very good and the plant design allows water to be fed directly to the membranes. Alternatively, the raw water can be coagulated and flocculated prior to the membranes in dual-purpose tanks. To enable side-by-side comparison, two different membrane systems are being supplied by the vendor, Zenon Membrane Solutions, ZW500d with a large diameter fiber and low packing density and ZW1000 with a finer fiber and a higher packing density. To improve performance, both membrane systems use periodic solids removal by tank drain, rather than the "feed and bleed" method used previously by the membrane system vendor. Implementing this solids removal method presented significant design challenges. To reduce overall power consumption, individual permeate pumps that create the operating vacuum for the membranes have been replaced by siphons located in an equalization tank. A small number of efficient vertical turbine pumps transfer water from the wet well to the clearwells. Additionally, the membrane tanks are aerated by efficient positive displacement blowers and the control system for these blowers incorporates two modes of operation, air cycling and intermittent air operation. Includes tables, figures.