为了满足第一阶段和未来第二阶段的消毒剂和消毒副产品 按照规定，科布县玛丽埃塔水务局已经完成了一项密集的试点规模 消毒副产物（DBP）深度处理技术评价 在每天7200万加仑（mgd）的Wyckoff水处理中去除前体 植物（WTP）。当局观察到配电系统中DBP水平升高， 由于几个连续的系统从多个来源购买水 以及水力停留时间延长的区域，简单的解决方案，如 氯剂量或改用氯胺都不是选项。 该研究由房委会及其顾问在12个月内进行， CDM，利用两列中试规模处理厂。一列火车被用来模拟 现有的快速混合、絮凝、沉淀和过滤处理工艺 提供基线比较，而第二个序列用于评估 将各种DBP前体还原技术添加到现有Wyckoff WTP中 处理过程培训。研究中评估的技术包括预氯 二氧化物代替预氯化、预臭氧/生物过滤和中间臭氧/生物过滤 强化离子交换（MIEX）和后过滤纳滤。 研究结果表明，威克夫植物具有显著降低DBP的能力 通过切换到二氧化氯作为空气中的预氧化剂，达到第1阶段的要求 代替预氯化。臭氧/生物过滤在这方面没有增量差异 与二氧化氯前体相比，DBP前体去除的结果。两种预处理 使用MIEX和后滤器，纳滤可显著降低DBP 前体，使这些技术在未来的实施中得以考虑 满足第2阶段DBP要求。包括参考资料、表格、图表。

In order to meet the Stage 1 and future Stage 2 Disinfectant and Disinfection Byproducts Rules, the Cobb County-Marietta Water Authority has completed an intensive pilot-scale evaluation of advanced treatment technologies for disinfection byproduct (DBP) precursor removal at the 72-million-gallons-per-day (mgd) Wyckoff water treatment plant (WTP). The authority had observed elevated DBP levels in the distribution system, and due to the fact that several consecutive systems purchase water from multiple sources and areas with extended hydraulic residence time, simple solutions such as decreasing chlorine dose or switching to chloramines were not options. The study was conducted over a 12-month period by the authority and its consultant, CDM, utilizing a two-train pilot-scale treatment plant. One train was used to simulate existing rapid mixing, flocculation, sedimentation, and filtration treatment processes to provide a baseline comparison, while the second train was used to evaluate the effect of adding various DBP precursor reduction technologies to the existing Wyckoff WTP treatment process train. Technologies evaluated in the study included pre-chlorine dioxide in lieu of prechlorination, pre- and intermediate-ozone/biofiltration, magnetically enhanced ion exchange (MIEX), and post-filter nanofiltration. Results of the study indicated the ability of the Wyckoff plant to significantly lower DBP levels to meet Stage 1 requirements by switching to chlorine dioxide as a pre-oxidant in lieu of prechlorination. Ozone/biofiltration did not have an incremental difference in the results for DBP precursor removal compared to pre-chlorine dioxide. Both pretreatment with MIEX and post-filter nanofiltration provided significant reduction in DBP precursors, allowing these technologies to be considered for future implementation to meet Stage 2 DBP requirements. Includes reference, tables, figures.