本文介绍了连续氯胺化的两项初步研究结果 对微咸地下水反渗透（RO）处理过程中的生物污染控制进行了评估 （研究A）和地表水（研究B）。 研究A包括对曝气水脱矿的反渗透处理试验 地下水被三氯乙烯（TCE）污染，以去除总溶解量 固体（TDS）、硝酸盐和砷。主要问题 在将反渗透应用于该地下水的过程中，由于 溶解氧含量升高（通过空气剥离地下水以去除 TCE）和地下水污染产生的微量可同化有机物。 为了解决这个问题，进行了一项初步研究，以确定生物污染的程度 并评估持续氯胺化控制生物污染的能力 不会导致任何膜降解。 论文提供了 使用的中试规模处理流程示意图。研究B试点试验中使用的地表水取自许多湖泊之一的梦露湖 位于圣约翰河沿岸，该河为东北部的分水岭排水 佛罗里达州的一部分。本文提供了关键水的平均值、最大值和最小值 2000年1月采样期间测量的湖水质量参数 至2002年8月。反渗透处理可以去除颜色，减少溶解的有机物 碳（DOC）水平（确保符合消毒副产品法规） 在游离氯消毒后），并将TDS降低至<400 mg/L，以符合 现有地下水供应的矿化度。符合地表水处理要求 为了减少反渗透膜污染，首先对湖水进行预处理 使用硫酸铁混凝、高速澄清（超脉冲）和颗粒介质 过滤。硫酸铁在快速混合之前与硫酸或硫酸混合 苛性碱的pH值达到4.3，以优化DOC去除。一种阳离子聚合物也被加入到溶液中 提高絮体沉降性。在试验的第一部分（0至900小时），氨， 在添加硫酸铁之前，先向原水中添加氯，以达到 滤池出水中测得的目标组合余氯为1.0 mg/L。从900 试验结束数小时后，氯胺化点被重新定位，以过滤进水 基于反渗透性能的变化。本文包括了整个过程的示意图 研究B治疗系统。 包括7个参考文献、表格、图表。

This paper describes the results of two pilot studies in which continuous chloramination was evaluated for control of biofouling during reverse osmosis (RO) treatment of a brackish groundwater (Study A), and a surface water (Study B). Study A comprised the testing of RO treatment for demineralization of an aerated groundwater contaminated with trichloroethylene (TCE) for the removal of total dissolved solids (TDS), nitrate and arsenic. A major concern in the application of RO to this groundwater was the potential for biological fouling due to the elevated dissolved oxygen content (from air stripping of the groundwater to remove the TCE) and presence of trace levels of assimilable organic matter from groundwater pollution. To address this concern, a pilot study was conducted to determine to what extent biofouling would occur and to assess the ability of continuous chloramination to control biofouling without causing any membrane degradation. The paper provides a schematic for the pilot-scale treatment process used. The surface water used in Study B pilot testing was taken from Lake Monroe, one of many lakes located along the St. Johns River, which drains the watershed located in the northeastern portion of Florida. The paper provides the mean, maximum and minimum values for key water quality parameters of the lake water as measured during the sampling period January 2000 to August 2002. RO treatment was evaluated to remove color, reduce dissolved organic carbon (DOC) levels (to ensure compliance with disinfection byproduct regulations following free chlorine disinfection) and to reduce TDS to <400 mg/L to match the minerality of existing groundwater supplies. To comply with the Surface Water Treatment Rule (SWTR) and to minimize RO membrane fouling, the lake water was first pretreated using ferric sulfate coagulation, high rate clarification (SuperPulsator) and granular media filtration. Ferric sulfate was dosed prior to rapid mix along with either sulfuric acid or caustic to attain a pH of 4.3 to optimize DOC removal. A cationic polymer was also added to improve floc settleability. During the first portion of testing (0 to 900 hours), ammonia, followed by chlorine, were dosed to the raw water prior to ferric sulfate addition to achieve a target combined chlorine residual of 1.0 mg/L as measured in the filter effluent. From 900 hours to the end of testing, the point of chloramination was re-located to filter influent based on changes in RO performance. The paper includes the overall process schematic for the Study B treatment system. Includes 7 references, tables, figures.