加利福尼亚州奥兰治县的地下水补给（GWR）系统是一种间接饮用水系统 再利用项目将每天产生7000万加仑（mgd）的水，最初使用 地下水补给和地下水盆地保护的最终容量为130 mgd 海水入侵。由Orange County Water District（OCWD）和Orange 在县卫生区，GWR系统将由三个主要部分组成: 先进净水设施（AWPF）和泵站； 主要管道 将处理设施连接到现有的补给池；以及现有系统的扩展 海水入侵屏障。目前，AWPF将处理澄清的二级污水 使用微滤（MF）、反渗透（RO）和先进技术排放到海洋中 氧化（用过氧化氢进行紫外线处理）。产品水将是 泵送至注入井和补给池，水将自然通过这些区域 研磨并与奥兰治县的其他地下水资源混合。 除了提供新的， 当地水源，该项目将不再需要额外的海洋排水口， 并将改善奥兰治县地下水流域的水质。 为了在AWPF施工期间维护海水入侵屏障，OCWD建造了一个 新的MF系统，安装了新的反渗透膜，并构建了一个新的紫外线灯 在AWPF施工完成之前，处理系统将产生5 mgd的注入水， 预计在2007年8月。该项目被称为GWR系统1期，包括 采用潜水式MF系统，使用聚酰胺反渗透膜，低压高输出 （LPHO）紫外线与过氧化氢高级氧化系统。 一旦GWR系统一期建设和启动完成，一系列水质 对系统进行了测试。GWR系统1期成功完成了30天的试验 验收测试，并符合《加利福尼亚州区域供水标准》中规定的水质要求 质量控制委员会生产商/用户水回收许可证。自2004年6月21日以来，约5 mgd的GWR系统1期产品水已用于补充 保护OCWD地下水盆地免受海水入侵的水源。尽管进行了试点测试 在建造GWR系统第1阶段之前，在MF和RO膜上进行， 这是首次有机会在安装前长时间运行系统 70 mgd膜厂的实施。 本文介绍了当前MF和RO出水水质和性能 与许可证要求、30天验收试验数据和标准以及过去 来自Water Factory 21设施的醋酸纤维素反渗透膜数据。 包括8个参考文献、表格、图表。

The Groundwater Replenishment (GWR) System in Orange County, California is an indirect potable reuse project that will produce 70 million gallons per day (mgd) of water initially with an ultimate capacity of 130 mgd for groundwater recharge and groundwater basin protection from seawater intrusion. Sponsored by the Orange County Water District (OCWD) and the Orange County Sanitation District, the GWR System will be comprised of three major components: the Advanced Water Purification Facility (AWPF) and pumping stations; a major pipeline connecting the treatment facilities to existing recharge basins; and, an extension of the existing seawater intrusion barrier. The AWPF will treat clarified secondary effluent, currently discharged into the ocean, using microfiltration (MF), reverse osmosis (RO), and advanced oxidation (ultraviolet light treatment with hydrogen peroxide). The product water will be pumped to injection wells and recharge basins, where the water will naturally pass through the ground and blend with Orange County's other sources of groundwater. Besides providing a new, local source of water, the project will eliminate the need for an additional outfall to the ocean, and will improve the water quality of the Orange County groundwater basin. To maintain the seawater intrusion barrier during AWPF construction, OCWD has constructed a new MF system, installed new RO membranes, and constructed a new ultraviolet (UV) light treatment system to produce 5 mgd of injection water until AWPF construction is complete, which is estimated to be in August 2007. This project, known as GWR System Phase 1, consists of a submersible MF system, the use of polyamide RO membranes, and a low-pressure high-output (LPHO) UV light with hydrogen peroxide advanced oxidation system. Once the GWR System Phase 1 construction and startup was complete, a series of water quality tests was performed on the system. The GWR System Phase 1 successfully completed a 30-day acceptance test and met the water quality requirements set forth in the California Regional Water Quality Control Board Producer/User Water Recycling permit. Since June 21, 2004, approximately 5 mgd of GWR System Phase 1 product water has been used to supplement sources to protect OCWD's groundwater basin against seawater intrusion. Although pilot testing was performed on the MF and RO membranes prior to constructing the GWR System Phase 1, this is the first opportunity to operate the system for an extended period of time prior to implementation of the 70 mgd membrane plant. This paper presents current MF and RO effluent quality and performance data as compared to permit requirements, the 30-day acceptance test data and criteria, and past cellulose acetate RO membrane data from the Water Factory 21 facility. Includes 8 references, tables, figures.