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首页> 外文会议>2004 Water quality technology conference and exposition (2004 WQTC) >IMPLEMENTATION OF THE 5-MGD PHASE 1 OF THE GWR SYSTEMIN PREPARATION FOR CONSTRUCTION OF THE 70 MGD PURFICATIONFACILITY
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IMPLEMENTATION OF THE 5-MGD PHASE 1 OF THE GWR SYSTEMIN PREPARATION FOR CONSTRUCTION OF THE 70 MGD PURFICATIONFACILITY

机译：在建设70 MGD净化设施的准备中实施GWR系统的5-MGD第一阶段

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The Groundwater Replenishment (GWR) System is a major new program to provide a reliablernsource of water for protecting and recharging Orange County's groundwater basin. The GWRrnSystem is a joint program of the Orange County Water District (OCWD) and the Orange CountyrnSanitation District (OCSD) to produce 70 mgd of recycled water for use in the seawaterrnintrusion barrier and for groundwater recharge. The GWR System has replaced the aging WaterrnFactory 21 (WF-21) which was reaching the end of its useful life. Preliminary design of thisrnambitious project began in 1999 with the preparation of design criteria and technicalrnmemorandums. As part of these investigations, it was identified that WF-21 must remain inrnoperation during the construction of the Advanced Water Treatment Facility (AWPF) tornmaintain the seawater intrusion barrier.rnEarly start designs were envisioned to maintain WF-21 production and reduce the risk of costlyrndelays to the AWPF construction. One of the early start contracts is the Phase 1 of the GWRrnSystem project. Phase 1 GWR System construction involved the installation of 6.7 millionrngallons per day (mgd) of microfiltration (MF) to replace the existing 5 mgd WF-21 limernclarification system, currently being demolished. Issues regarding existing utility coordination,rnprocess control system operation, and assignment coordination for the MF and UV systems arosernduring construction of the Phase 1 GWR System and have proven valuable as "lessons learned"rnfor the AWPF design.rnConstructing Phase 1 GWR System allowed continued use of existing WF 21 facilities tornproduce water for the seawater intrusion barrier and has provided ongoing support for waterrnrecycling in Southern California, reducing the areas dependence on imported water.rnImplementation of the Phase 1 GWR System facilities has also provided OCWD with a chancernto operate a smaller 5 mgd (product water) system with the same treatment processes as the fullrnsize 70 mgd AWPF, giving the OCWD operators valuable experience and knowledge on a muchrnless complex system. The Phase 1 GWR System treatment train includes in-basin MF, newrnpolyamide RO membranes, and a UV system to demonstrate disinfection and NDMArndestruction capabilities. MF and UV process equipment used in the Phase 1 GWR System willrnbe relocated into the AWPF to increase project capacity and reduce overall project costs.rnOperating WF-21 during the AWPF construction will require detailed coordination as operatorsrnare involved in WF-21 operation and AWPF infrastructure inspection. Phase 1 GWR Systemrnsite power construction included installation of the backbone electrical conduits and a largernsubstation to facilitate a smooth switchover of the site power. Temporary access roads,rnadditional parking and proactive utility relocations will reduce the impact to OCWD operations
机译：地下水补给（GWR）系统是一项重要的新计划，旨在提供可靠的水源，以保护和补充橙县的地下水盆地。 GWRrnSystem是奥兰治县水区（OCWD）和奥兰治县卫生区（OCSD）的联合计划，生产70 mgd的再生水，用于海水入侵屏障和地下水补给。 GWR系统已取代老化的WaterrnFactory 21（WF-21），后者已达到使用寿命。这个宏伟的项目的初步设计始于1999年，最初是设计准则和技术备忘录的准备工作。作为这些调查的一部分，我们确定了WF-21在先进水处理设施（AWPF）的建造过程中必须保持无效，以维护海水入侵屏障。rn预计将尽早开始设计，以维持WF-21的生产并降低WF-21的风险。 costlyrn延迟AWPF建设。 GWRrnSystem项目的第一阶段是早期启动合同之一。 GWR系统1阶段的建设涉及每天安装670万加仑（mgd）的微滤（MF），以替代目前正在拆除的现有5 mgd WF-21石灰澄清系统。与现有的公用事业协调，过程控制系统操作以及MF和UV系统的分配协调有关的问题在第一阶段GWR系统的建设过程中出现，并已被证明是AWPF设计的“经验教训”。有价值的是，构建第一阶段GWR系统允许继续使用现有的WF 21设施为海水入侵屏障撕裂了水，并为南加州的水循环提供了持续的支持，减少了该地区对进口水的依赖。实施第一期GWR系统设施还为OCWD提供了一个较小的机会5 mgd（产品水）系统具有与标准70 mgd AWPF相同的处理工艺，为OCWD操作员提供了一套极为复杂的系统的宝贵经验和知识。 1期GWR系统处理流程包括流水内MF，新型聚酰胺RO膜和紫外线系统，以证明其消毒和NDMArn的破坏能力。一期GWR系统中使用的MF和UV处理设备将被转移到AWPF中，以提高项目能力并降低总体项目成本。在AWPF建设过程中操作WF-21将需要进行详细的协调，因为操作员将参与WF-21运营和AWPF基础设施检查。第一阶段GWR系统的现场电力建设包括安装主干电气管道和一个更大的变电站，以促进现场电力的平稳切换。临时通道，额外的停车位和主动的公用事业搬迁将减少对OCWD运行的影响

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