人们越来越感兴趣地将废水的膜处理用于工业过程用水、地下水补给和灌溉。多年来，奥兰治县的水厂21基本上是唯一的装置，但现在这项技术已经开始成熟。目前有五个项目的状态报告。加利福尼亚州圣帕斯夸尔市（San Pasqual，California）的1米高污水处理设施（于1994年开始运营）处理市政污水用于灌溉。佛罗里达州Vero Beach 0.2 mgd的设施（1992年开始运行）处理经过过滤的二级污水，供发电厂再次使用。加利福尼亚州利弗莫尔0.75 mgd示范项目（计划于1996年启动）将处理过滤后的二级污水，用于地下水补给和灌溉，最终计划扩建至约6 mgd。亚利桑那州斯科茨代尔市0.05 mgd的试点设施处理城市二级污水，并提供一套完整的污水处理系统- 规模分阶段扩大至约40 mgd，用于地下水补给和灌溉。亚利桑那州钱德勒（Chandler，Arizona）2.3米高的工厂（计划于1996年开工）将处理半导体芯片制造厂的工业废水，以进行补给。比较了这些项目的操作数据和工艺设计方面，包括预处理、膜类型、通量、消毒方法和回收。

There is increasing interest in the use of membrane processing of wastewater for reuse as industrial process water, groundwater recharge, and irrigation. For many years, Orange County's Water Factory 21 was essentially the only installation, but now the technology is starting to come of age. Status reports are presented on five current projects. The 1 mgd San Pasqual, California, facility (which began operation in 1994) processes municipal effluent for irrigation. The 0.2 mgd Vero Beach, Florida, facility (which began operation in 1992) processes filtered secondary effluent for reuse in a power plant. The 0.75 mgd Livermore, California, demonstration project (which has a planned 1996 startup date) will process filtered secondary effluent for groundwater recharge and irrigation with proposed eventual expansion to about 6 mgd. The 0.05 mgd Scottsdale, Arizona, pilot facility processes municipal secondary effluent, with a proposed full-scale expansion in stages to about 40 mgd for groundwater recharge and irrigation. The 2.3 mgd Chandler, Arizona, facility (which has a planned 1996 startup date) will process industrial effluent from a semiconductor chip manufacturing facility for recharge. Operational data and process design aspects of these projects are compared, including pretreatment, membrane type, flux, disinfection method, and recovery.