迈阿密-戴德水务公司是佛罗里达州最大的消费者群体 下水道部门（MDWASD）每天生产超过3.4亿加仑的饮用水 为大都会戴德县大约200万人供水。戴德县 依靠当地的比斯坎表层含水层提供饮用水。这个项目的生产力 含水层取决于它在佛罗里达州南部雨季（6月）接受的补给 1日至11月30日）。为了最大限度地利用这一资源，MDWASD安装了两个 至Bisaw蓄水层（比斯韦尔）和西南蓄水层（比斯韦尔） 雨季的含水层水，供旱季使用。ASR系统 利用弗洛里丹上层蓄水系统进行蓄水。因此，该ASR系统是一个 含水层间原水输送。地下喷射控制（UIC）法规 要求所有注入的水必须符合初级饮用水标准（PDWS） 包括消毒和消毒副产品（DBPs）监管要求。 目前，由于重污染后原水中很少出现大肠菌群细菌 在降雨事件中，ASR系统需要在大于0.75的降雨事件后关闭- 英寸，直到可以证明原水的细菌清除率。由于 雨季暴雨频繁，ASR系统的生产效率低下 有限的 雨季期间，ASR系统无法频繁充电导致 MDWASD寻求一种在注射前对原水进行消毒的方法。通过消毒 对于原水，MDWASD可以向监管机构保证注入的ASR水 始终满足PDW（包括雨季）。经过消毒评估 MDWASD的结论是，包括氯化和紫外线在内的方法 紫外线消毒将在注射前以最少的量对ASR原水进行消毒 避免对周围居民造成影响，避免对可能的 引入DBP，如总三卤甲烷（TTHM）和卤乙酸（HAA 5） 进入弗洛里丹蓄水层。MDWASD目前正在进行紫外线的设计 ASR西部和西南部井场的消毒系统将对原水进行消毒 在注入上弗洛里丹含水层之前，满足大肠菌群PDW要求。这个 本文的重点是记录项目的评估、许可、设计和施工 这个项目。重点将放在考虑紫外线剂量要求上 用于微生物（如大肠杆菌）灭活。包括桌子。

Serving the largest consumer population in the state of Florida, the Miami-Dade Water and Sewer Department (MDWASD) produces over 340 million gallons a day (mgd) of potable water to serve an estimated two million people in metropolitan Dade County. Dade County relies on the local surficial Biscayne Aquifer for its potable supply. The productivity of this aquifer is dependant on the recharge it receives during south Florida's rainy season (June 1- November 30). To maximize the use of this resource, the MDWASD has installed two aquifer storage and recovery (ASR) well fields (West and Southwest) to store raw Biscayne Aquifer water during the rainy season for use during the dry months. The ASR system utilizes the Upper Floridan aquifer system for storage. As a result, this ASR system is an inter-aquifer raw water transfer. Underground Injection Control (UIC) regulations mandate that all injected waters must meet Primary Drinking Water Standards (PDWS) including disinfection and disinfection byproducts (DBPs) regulatory requirements. Currently, due to the infrequent presence of coliform bacteria in the raw water after heavy rain events, the ASR system is required to shut down after rain events greater than 0.75- inches until bacteriological clearance of the raw water can be demonstrated. Due to the frequent heavy rain storms during the rainy season, the productivity of the ASR system is limited. The inability to infrequently recharge the ASR system during the rainy season caused MDWASD to look for a method to disinfect the raw water prior to injection. By disinfecting the raw water, MDWASD could assure the regulatory agencies that the injected ASR water met PDWS at all times (including the rainy season). After an evaluation of disinfection methods that included chlorination and ultraviolet (UV) light, MDWASD concluded that UV disinfection would disinfect the ASR raw water prior to injection with the least amount of effects to surrounding residents and avoid possible concerns regarding possible introduction of DBPs, such as total trihalomethanes (TTHM) and haloacetic acids (HAA 5) into the Floridan Aquifer. MDWASD is currently proceeding with the design of UV disinfection systems at the West and Southwest ASR well fields that will disinfect raw water to meet PDWS for coliform bacteria prior to injection into the Upper Floridan Aquifer. The focus of this paper is on documenting the evaluation, permitting, design, and construction of this project. Particular emphasis will be on the consideration of UV dosage requirements for microbiological (e.g. coliform) inactivation. Includes tables.