马萨诸塞州第一座苦咸水淡化水处理厂将沿着陶顿河建造 马萨诸塞州迪格顿的河流。拟建厂址的水源为季节性微咸水入侵 取水地点通常在7月至11月期间进行。水源水含水量高 天然有机物（NOM）和颜色，温度和盐度变化很大。因此，全面的 所考虑的工艺不仅必须足以为反渗透提供适当的预处理 但也必须能够在不需要反渗透系统的情况下提供完整的处理 去除全部溶解固体。具体来说，预处理过程必须有效去除NOM， 颜色、浊度和颗粒物是否符合第1和第2阶段消毒/消毒副产品规则，以及 长期2强化地表水处理规则。 进行替代方案分析，以确定满足这些需求的最有效流程。双重身份 最终选择了膜法，包括浸入式膜超滤（UF）和 反渗透（RO）。2002年9月启动了一项三季试点研究，并于2003年6月完成 并对所提出的双膜系统的性能进行了评估，并提供了设计方案 全面设施的标准。本研究的主要重点是确定最佳混凝方案 UF系统的有效运行，并评估UF系统为废水提供预处理的能力 反渗透系统。所研究的混凝剂包括明矾、两种品牌的聚合氯化铝（PACL）， 和三氯化铁。 本文介绍了中试研究的结果，主要集中在超滤混凝过程。飞行员 研究表明，在强化混凝模式下运行的超滤系统在水处理方面非常有效 为反渗透系统提供上游预处理，UF渗透质量允许系统稳定运行 飞行员。优化UF工艺后，测定了UF渗透液的泥沙密度指数（SDI） 平均低于2.5个单位，总颗粒保持在每毫升5个以下，渗透浊度平均为0.02 台大。此外，超滤系统实现了高达71%的总有机碳（TOC）去除率，高达88%的去除率 UV-254，表观颜色去除率>90%。三氯化铁作为一级混凝剂的应用被证明是最有效的 对NOM移除有效。包括9个参考文献、表格、图表。

The first brackish water desalination water treatment plant in Massachusetts will be constructed along the Taunton River in Dighton, Massachusetts. The source water is seasonally brackish and salt water intrusion at the proposed intake location normally takes place during the period of July through November. The source water is high in natural organic matter (NOM) and color, with wide variations in temperature and salinity. Thus, the full-scale process being considered must not only be adequate in providing proper pretreatment for the reverse osmosis system, but must also be able to provide full treatment when the reverse osmosis system is not required for removal of total dissolved solids. Specifically, the pretreatment process must be effective in removing NOM, color, turbidity and particles for compliance with the Stage 1 & 2 Disinfection/Disinfection Byproduct Rule and Long Term 2 Enhanced Surface Water Treatment Rule. An alternatives analysis was conducted to identify the most effective process to satisfy these demands. A dual membrane approach was ultimately selected, involving immersed membrane ultrafiltration (UF) followed by reverse osmosis (RO). A three season pilot study was initiated in September 2002 and completed in June of 2003 and was conducted to evaluate the performance of the proposed dual membrane system and to provide design criteria for the full-scale facility. The major focus of this study was to identify the optimal coagulation scheme for efficient operation of the UF system, and to evaluate the ability of the UF system to provide pretreatment for the RO system. The coagulants that were investigated included alum, two brands of polyaluminum chloride (PACL), and ferric chloride. This paper presents the results of the pilot study, with the major focus on the UF coagulation process. The pilot study demonstrated that the UF system, operated in the enhanced coagulation mode, was very effective in providing upstream pretreatment for the RO system, and the UF permeate quality allowed for stable operation of the RO pilot unit. After optimization of the UF process, silt density index (SDI) values of UF permeate were below 2.5 units average, total particles were maintained below 5 per mL, and permeate turbidity averaged 0.02 NTU. In addition, the UF system achieved up to 71% removal of total organic carbon (TOC), up to 88% removal of UV-254, and > 90 % removal of apparent color. The use of ferric chloride as primary coagulant proved most effective for NOM removal. Includes 9 references, tables, figures.