佐治亚州德卡尔布县负责近30年的饮用水处理和分配 亚特兰大大都会地区的70万市民。由于该地区的持续增长，该县 决定建造一座新的饮用水处理厂，并使其现有设施退役 20世纪40年代。这座新设施的设计目的是在相邻的地产上建造，以便继续运营 最初允许使用现有的清洁井和高服务泵站 每天1.5亿加仑（mgd）。然而，其设计为在以下液压容量下运行: 200 mgd，外加30 mgd的冗余容量。 新工厂的设计目的是利用先进的处理技术来实现当前和未来的目标 并满足可靠性和基于风险的冗余的高标准。这个 新设施的处理工艺包括预臭氧氧化、高效板澄清 沉降器、用于微生物控制的中间臭氧氧化和DBP前体还原，然后 深床GAC生物过滤器和成品水化学应用。为了最大限度地减少水的流失 该工厂设计为零排放设施，具有所有过滤器反洗和固体流 被平衡和澄清，最终被回收。处理关键的循环流 通过紫外线消毒系统。设施中的固体在新的脱水系统中进行处理 容纳离心机和污泥泵送设备的建筑。设计和施工中的创新方法，如共享墙 建造并使用现场混凝土配料厂，供应超过12万立方米的混凝土 混凝土堆场，导致该设施的最终施工成本为1.02美元/加仑（即 包括额外的25%冗余容量）。 将新设施安置在现有设施附近，以便县运营和 维护人员观察并参与其设施的建设，并提供 能够在启动阶段将水循环至原水蓄水池的优点 必须向配水系统送水。从现有工厂过渡到新工厂 设施包括因退休而失去关键县工作人员的相关挑战，计划 挑战，并制定过渡计划，将运营从现有设施转移到 新工厂。 本文介绍了东南航空公司在设计、建造和启动方面面临的独特挑战 最大最先进的地表水处理厂。包括表格，数字。

DeKalb County, Georgia, is responsible for potable water treatment and distribution for nearly 700,000 citizens of the metro Atlanta region. Due to continued growth in the region, the county decided to build a new potable water treatment plant and decommission their existing facility built in the 1940s. The new facility, designed to be constructed on adjacent property to allow continued use of existing clearwells and high-service pumping stations, is designed to be initially permitted at 150 million gallons per day (mgd). However, it is designed to operate at a hydraulic capacity of 200 mgd, with an additional 30 mgd of redundant capacity. The new plant was designed to use advanced treatment technologies to achieve current and future regulatory requirements and meet high standards for reliability and risk based redundancy. The treatment process for the new facility includes pre-ozonation, high-rate clarification with plate settlers, intermediate ozonation for microbial control and DBP precursor reduction followed by deep-bed GAC biofilters, and finished water chemical application. To minimize water loss, the plant is designed to operate as a zero discharge facility with all filter backwash and solids streams being equalized and clarified and ultimately being recycled. Key recycle streams are treated through an ultraviolet disinfection system. Solids from the facility are treated at a new dewatering building that houses centrifuges and sludge pumping equipment. Innovative approaches in design and construction, such as shared wall construction and utilizing an onsite concrete batching plant to supply more than 120,000 cubic yards of concrete, resulted in final construction costs for this facility of $1.02 /gal of capacity (that includes an additional 25% redundant capacity). Locating the new facility adjacent to the existing facility allowed for county operations and maintenance staff to observe and participate in the construction of their facility, and provided the advantage of being able to recycle water to the raw water reservoirs during startup phase without having to send water to the distribution system. Transition from the existing plant to the new facility included challenges associated with loss of key County staff due to retirement, schedule challenges, and developing a transition plan to transfer operations from the existing facility to the new plant. This paper presents the unique challenges in design, construction, and startup of the southeast's largest and most advanced surface water treatment plant. Includes table, figures.