公众舆论越来越担心 接触饮用水中的卤化消毒副产物（DBPs）等 当前和即将出台的DBP法规（第一阶段DBPR和第二阶段）的严格要求 DBPR）激发了许多公用事业公司探索 无需大量资金即可实施的替代战略 投资。 本文介绍并比较了台架试验的结果和意义 由美国东部四家不同的公用事业公司委托。这些公用事业公司使用 传统的地表水处理工艺具有多种混凝和 消毒方案。消毒措施包括使用氯气和氯气 二氧化碳预处理- 氧化和初级消毒，以及氯气和氯胺化 二次消毒。 进行这些测试是为了调查针对患者的治疗过程的修改 降低工厂中的DBP水平以及成品水化学的变化 专注于保持可接受的DBP水平，即使是在系统的偏远地区 不影响消毒目标。处理厂改造包括: 加强前体去除，优化消毒剂应用点，以及 减少过量使用消毒剂。模拟配电系统测试 在研究降低成品水pH值、降低氯残留的效果时， 用组合氯代替游离氯进行二次消毒。 这些研究的结果说明了三卤甲烷（THM）和卤乙酸的发展趋势 （HAA）每个备选方案或备选方案组合产生的水平 测试。更重要的是，对测试结果的分析清楚地定义了每种方法的好处 选项和每个公用事业公司可用于控制中DBP水平的选项的排名 它的系统。目前，四家公用事业公司正在进行全面改造 本文对此进行了讨论。 包括3个参考文献、表格。

The growing concern of public opinion over possible adverse health effects derived from exposure to halogenated disinfection byproducts (DBPs) in drinking water and the more stringent demands of present and upcoming DBP regulations (Stage 1 DBPR and Stage 2 DBPR) have stimulated the interest of many utilities in exploring the effectiveness of alternative strategies that may be implemented without requiring major capital investments. This paper presents and compares the results and the implications of bench-scale testing commissioned by four different utilities in the Eastern U.S. These utilities use conventional surface water treatment processes with a variety of coagulation and disinfection schemes. Disinfection practices include the use of chlorine and chlorine dioxide for pre-oxidation and primary disinfection, and chlorine and chloramination for secondary disinfection. The tests were conducted to investigate modifications of the treatment process targeted to lowering DBP levels in the plants as well as changes in finished water chemistry that focused on maintaining acceptable DBP levels even in remote areas of the system without compromising disinfection goals. Treatment plant modifications included: enhancement of precursor removal, optimization of disinfectant application point, and curtailing excessive disinfectant application. Simulated distribution system tests focused on studying the effects of lowering the pH of finished water, lowering chlorine residuals, and replacing free chlorine with combined chlorine for secondary disinfection. The results of these studies illustrate trends in trihalomethane (THM) and haloacetic acid (HAA) levels resulting from each individual alternative or combination of the alternatives tested. More importantly, the analysis of test results clearly defined the benefits of each option and the ranking of the options available to each utility for control of DBP levels in its system. Full-scale modifications are currently being implemented at the four utilities discussed in this paper. Includes 3 references, tables.