寻找一种劳动力密集度较低、成本较低的消毒剂流失问题解决方案 最后，南加州水务公司西南区（District）实施了一项研究，以调查 基于聚磷酸盐的腐蚀抑制剂，用于消毒残留物、水力学和水 质量本研究的主要目的是: 确定多聚磷酸盐的应用之间的关系 混合和氯残留水平； 确定添加聚磷酸盐混合物对生物膜的影响 分配系统内的积累； 确定添加后是否减少了因颜色引起的客户投诉 聚磷酸盐混合物；和 确定是否减少了因味道、气味和颗粒物引起的客户投诉 加入聚磷酸盐混合物后。聚磷酸盐混合物的添加始于1998年11月6日，以小规模进行， 配电系统的隔离区不到1 mi2，并于6月扩大 从1999年的17号到大约3.6平方米。研究区域内的管道直径为4 直径为12英寸，材料成分约为50%无衬里铸造 铸铁、25%水泥内衬铸铁和25%石棉水泥管。研究区域是 大约80%的住宅和20%的商业和轻工业设施 代表分销系统的其他部分。 聚磷酸盐混合物最初添加到一个地下水源中，然后扩展到另外五个地下水源和一个地表水 联系2002年11月，又有两个地下水源和一个 增加地表水源。在该项目中增加至少两个地下水资源是必要的 计划在今年年底或明年年初。目前 将聚磷酸盐混合物添加到五个地下水源和两个地表水中 连接。使用1.2至2.5 mg/L的氯胺剂量对每个来源进行消毒 由井水中的游离氯与天然氨结合形成，或 通过添加浓度为19%的氢氧化铵溶液，溶液中Cl2与NH4-N的比例为5:1 氯化水。 聚磷酸盐混合物的剂量根据以下规定设定:1 mg/L/mg/L 铁和锰加上所有二价金属，每200 mg/L测得的硬度为1 mg/L 以CaCO3的形式添加0.15-0.3 mg/L，用于残留和腐蚀控制。在所有地点 聚磷酸盐混合溶液在现场添加氯和/或氨后注入 工厂污水管线。 为了评估研究目标，目前在 七个分布点，代表工厂现场。除了 七个主要地点的水质样本也从水井和多达 分配系统内的25个其他位置。本文总结和讨论了从该研究的一个特定领域获得的结果 配送系统如前所述。这个地区的所有水源都经过了处理 从那时起，人们就开始收集该地区的水质数据 1998年6月。包括16个参考文献、表格和图表。

In search of a less labor intensive and costly solution to the problem of losing disinfectant residual, the Southern California Water Company - Southwest District (District) implemented a study to investigate the long-term effect of polyphosphate based corrosion inhibitors on disinfection residuals, hydraulics, and water quality. The major objectives of this study were to: determine the relationship between the application of the polyphosphate blend and chlorine residual level; determine the effect of the addition of the polyphosphate blend on biofilm accumulation within the distribution system; determine if customer complaints due to color were reduced after the addition of the polyphosphate blend; and, determine if customer complaints due to taste, odor and particles were reduced after the addition of the polyphosphate blend. The addition of the polyphosphate blend started on November 6, 1998, in a small, isolated area of the distribution system less than 1 mi2 and was expanded on June 17, 1999 to approximately 3.6 mi2 in size. Pipe diameters in the study area vary from 4 to 12 inches in diameter and material composition is approximately 50% unlined cast iron, 25% cement-lined cast iron and 25% asbestos cement pipe. The study area is approximately 80% residential and 20% commercial and light industrial facilities and is representative of the rest of the distribution system. The polyphosphate blend was initially added to one groundwater source and then expanded to five more groundwater sources and one surface water connection. In November of 2002, two more groundwater sources and one surface water source were added. The addition of at least two more groundwater sources to this program is planned for the end of this year or the beginning of next year. Currently, the polyphosphate blend is added to five groundwater sources and two surface water connections. Each source is disinfected with a chloramine dose of 1.2 to 2.5 mg/L. The chloramines are formed by combining free chlorine with natural ammonia in the well water, or by adding a 19% strength ammonium hydroxide solution at a Cl2 to NH4-N ratio of 5:1 to chlorinated water. Dosing of the polyphosphate blend is set according to the following: 1 mg/L per mg/L of iron and manganese plus all divalent metals, 1 mg/L per 200 mg/L of hardness measured as CaCO3, plus 0.15-0.3 mg/L for residual and corrosion control. At all sites the polyphosphate blend solution is injected after the chlorine and/or ammonia addition at the plant effluent line. To evaluate the study objectives, water quality constituents are currently collected at seven distribution sites, which are representative of the plant sites. In addition to the seven primary locations, water quality samples are also collected from the wells and up to 25 other locations within the distribution system. This paper summarizes and discusses results obtained from one specific area of the distribution system as described before. All the water sources for this area are treated with the polyphosphate blend, and water quality data from this area has been collected since June of 1998. Includes 16 references, tables, figures.