Palmdale water District（District）的原水来源包括州项目用水（SPW） 和Littlerock水库，在Palmdale水处理厂（WTP）进行处理，以及 还有几口地下水井。该地区一直在努力遵守该法案的第一阶段 消毒剂和消毒副产品规则（D/DBPR），其中包括对 氯化副产物，尤其是总三卤甲烷（TTHMs）和五卤乙酸 （HAA-5）。TTHMs和HAA-5水平升高的主要原因是自然和环境因素 天然有机物（NOM）的含量以及 SPW中的溴。该地区已采取措施降低消毒副产品（DBP）水平 在分配系统内，例如增加地下水的使用（以及减少 使用SPW）和增加凝固剂剂量。这两种策略都不够长 长期解决方案。 该地区正在进行一场激烈的辩论 评估工艺组合以改善工厂DBP控制和 实现对第一阶段和第二阶段D/DBPRs的遵守。工艺操作条件、设计 标准和初步成本是在之前的桌面级研究中针对MIEX®颗粒活性炭制定的 （GAC）、固定床离子交换（IX）和高压膜。这项研究奠定了基础 用于选择本试验研究的初始操作条件。三卤甲烷的工艺组合 包括在试点研究中的前体去除包括: MIEX®（磁浸渍离子交换树脂），具有增强的凝固和 下游GAC处理； MIEX®与新型陶瓷膜结合；和 常规治疗的固定床IX。 还研究了GAC处理对上游工艺中形成的THM的去除。 工厂运行数据表明，溴化物主要被纳入工厂内的三卤甲烷中 治疗列车。这些THM的吸附意味着GAC基本上可以正常工作 作为一种溴化物去除过程。 本文介绍了MIEX®/常规治疗组合的初步结果。 根据对迄今为止收集的试点数据的分析，提供了初步结论，以及 上一次桌面研究的结果。包括表格、数字。

Raw water sources for the Palmdale Water District (District) include State Project Water (SPW) and Littlerock Reservoir, which are treated at the Palmdale Water Treatment Plant (WTP), and also several groundwater wells. The District has struggled to comply with Stage 1 of the Disinfectants and Disinfection Byproducts Rule (D/DBPR), which includes stringent limits on chlorination byproducts, in particular total trihalomethanes (TTHMs) and five haloacetic acids (HAA-5). The main reasons for the elevated levels of TTHMs and HAA-5 are the nature and amount of natural organic matter (NOM) and the presence of significant concentrations of bromide in SPW. The District has taken steps to reduce disinfection byproduct (DBP) levels within the distribution system, such as increasing the use of groundwater (and decreasing the use of SPW) and increasing coagulant doses. Neither of these strategies is a sufficient long term solution. The District is performing a pilot study to evaluate combinations of processes to improve DBP control at the plant and to achieve compliance with the Stage 1 and 2 D/DBPRs. Process operating conditions, design criteria and, preliminary costs were developed in a previous desk-top level study, for MIEX®, granular activated carbon (GAC), fixed bed ion exchange (IX), and high-pressure membranes. That study formed the basis for selection of initial operating conditions for this pilot study. Process combination for THM precursor removal, included in the pilot study are: MIEX® (magnetically impregnated ion exchange resin) with enhanced coagulation and downstream GAC treatment; MIEX® in combination with a novel ceramic membrane; and, Fixed-bed IX with conventional treatment. GAC treatment was also investigated for removal of THMs formed in the upstream processes. Plant operations data indicates that bromide is largely incorporated into THMs within the treatment train. Adsorption of those THMs would mean that the GAC was essentially functioning as a bromide removal process. This paper presents preliminary results for the MIEX®/conventional treatment combination. Tentative conclusions are provided, based on an analysis of the pilot data collected to date, and the results of the previous desk-top study. Includes tables, figures.