南加州水务公司已经进行了测试，以同时清除 洛杉矶南部Centralia工厂地下水中的砷和锰。这个 测试由AWWA研究基金会部分资助，作为量身定制的合作。这个 该项目包括台架和中试规模的工艺测试、全尺寸管道的设计和施工 改进和全面试验，以调查氯和三氯化铁的可能性 添加后过滤，同时去除砷和锰。 南加利福尼亚州的许多油井都配备了加压过滤器，用于过滤 除锰。然而，除锰工艺（氧化/直接过滤）是可行的 对砷的去除不是很有效，尤其是当地下水中的铁浓度较低时 低的有几种已知的砷去除处理技术，包括 传统工艺（如凝固/过滤和软化）和新兴技术 （例如，凝固辅助膜工艺和专有吸附剂）。然而，最重要的是 其中一种方法不适用于城市地下水井处理特定的砷/ 由于需要更大的空间、多种化学物质处理和高成本，锰问题令人担忧。 由于南加州的许多井场与住宅区相邻，占地面积很小 而且通常需要最少的化学品使用量。 研究的具体目标是回答以下关键问题: 氯和三氯化铁的添加会同时进行过滤吗 去除砷和锰； 三氯化铁剂量和过滤水砷之间的关系是什么 浓度 台架试验如何有效地估计所需的三氯化铁剂量 达到过滤水砷浓度的目标； 先导试验将如何有效地评估过滤设计和运行 参数包括过滤器运行时间；和 达到目标的最佳设计和操作参数是什么 废水和污泥最少的成品水砷浓度 生产 为了研究砷和锰的去除，进行了以下主要任务: 现有条件分析； 台架试验； 中试规模测试； 全面改进的设计和施工； 全面测试；和 数据管理和报告。 包括表格、数字。

The Southern California Water Company has conducted testing to simultaneously remove arsenic and manganese from groundwater at its Centralia plant south of Los Angeles. The testing was funded in part by the AWWA Research Foundation as a Tailored Collaboration. The project included bench- and pilot-scale process testing, design and construction of full-scale improvements, and full-scale trials to investigate the potential for chlorine and ferric chloride addition followed by filtration to simultaneously remove arsenic and manganese. Many wells in Southern California have been equipped with pressurized filters for manganese removal. However, the manganese removal process (oxidation/direct filtration) is not very effective for arsenic removal especially when iron concentration in the groundwater is low. There are several known treatment technologies for arsenic removal, including both conventional processes (e.g., coagulation/filtration and softening) and emerging technologies (e.g., coagulation assisted membrane processes and proprietary adsorbents). However, most all of them are not feasible for urban groundwater wells to address the particular arsenic/ manganese concern due to larger space requirements, multiple chemical handling, and high costs. Since many well sites in Southern California are adjacent to residential areas, a small footprint and minimum chemical usage are often required. The specific goals of the research were to answer the following key questions: will chlorine and ferric chloride addition followed by filtration simultaneously remove arsenic and manganese; what is the relationship between ferric chloride dose and filtered water arsenic concentration; how effectively will bench-testing estimate the required ferric chloride dose to achieve the target filtered water arsenic concentration; how effectively will pilot-testing estimate filtration design and operating parameters including filter run time; and, what are the optimal design and operating parameters to achieve the target finished water arsenic concentration with minimum water waste and sludge production? The following major tasks were performed to investigate arsenic and manganese removal: analysis of existing conditions; bench-scale testing; pilot-scale testing; design and construction of full-scale improvements; full-scale testing; and, data management and reports. Includes tables, figures.