本文讨论了帕萨迪纳、加利福尼亚和休士顿大学MWH之间的合作努力。 展示传统离子交换技术的长期性能 去除高氯酸盐，并 评估盐水处理和再利用的两种不同替代方案（化学和生物）。 在实现这些目标的同时，试点规模系统的基本要求是 确保净化水的高氯酸盐浓度保持在最近降低的浓度以下 加州公共卫生服务部高氯酸盐咨询行动水平为4微克/升。 在MWH的移动式水处理试验拖车内设计、建造和安装 中试装置包括两个可操作的平行离子交换柱（透明PVC） 独立于并流或逆流耗尽和再生。在本研究中，色谱柱在逆流模式下运行，具有上流排气和下流再生。屏幕已插入顶部和底部 每根离子交换柱中的树脂，以在排气过程中容纳树脂，以及 再生模式。处理后的水收集在一个干净的井中，也用于冲洗水 再生后。废盐水溶液既可以被浪费，也可以收集在储槽中，以供储存 被送入盐水处理系统。然后，处理后的盐水返回再生系统 （甜）盐水罐。 化学盐水处理系统， 由Calgon Carbon Corporation（宾夕法尼亚州匹兹堡）提供，雇佣了一名高- 采用高压和高温催化工艺降低废水中的硝酸盐和高氯酸盐 盐水。在PNDM之后，处理过的盐水即可重复使用。PNDM使用一种化学物质 还原剂（氨）剂量基于测量的溶液中硝酸盐和高氯酸盐浓度 废盐水。 这个序批式反应器 （SBR）利用最初从海泥接种物发展而来的培养物来减少硝酸盐 以及废盐水中的高氯酸盐。SBR顶部空间充满氮气，以帮助提供 转移期间培养物的缺氧环境。SBR和甜盐水之间的过滤器 蓄水池防止未沉淀的生物质在再生过程中堵塞树脂。 包括表格、数字。

This paper discusses a collaborative effort between MWH of Pasadena, California and the University of Houston to demonstrate the long-term performance of conventional ion-exchange technology for perchlorate removal, and to evaluate two disparate alternatives (chemical and biological) for brine treatment and reuse. While addressing these objectives, the underlying requirement of the pilot-scale system is to ensure that the treated water perchlorate concentration remains below the recently lowered California Department of Public Health Services perchlorate Advisory Action Level of 4 ug/L. Designed, constructed and installed within MWH's Mobile Water Treatment Pilot Trailer, the pilot plant includes two parallel ion-exchange columns (clear PVC) that can be operated independently in either co- or counter-current exhaustion and regeneration. For the purposes of this study, the columns have been operated in a counter-current mode with up-flow exhaustion and down-flow regeneration. Screens have been inserted at the top and bottom of each ion-exchange column to contain the resin in the column during the exhaustion and regeneration modes. The treated water is collected in a clearwell and is also used for rinse water after regeneration. The spent brine solution can either be wasted or collected in a holding tank to be fed to the brine treatment system. The treated brine is then returned to the regeneration (sweet) brine tank. The chemical brine treatment system, provided by Calgon Carbon Corporation (Pittsburgh, PA), employs a high- pressure and high-temperature catalytic process to reduce the nitrate and perchlorate in the spent brine. After the PNDM, the treated brine is then ready for reuse. The PNDM uses a chemical reductant (ammonia) dose based on the measured concentrations of nitrate and perchlorate in the spent brine. This sequencing batch reactor (SBR) utilizes a culture initially developed from a marine mud inoculum to reduce the nitrate and perchlorate in the spent brine. The SBR headspace is filled with nitrogen to help provide an anoxic environment for the culture during transfers. Filters between the SBR and sweet brine reservoir prevent unsettled biomass from plugging the resin during regeneration. Includes tables, figures.