本powerpoint演示文稿首先简要概述了明尼苏达州哈钦森的水处理厂。关键研究问题包括以下方面:超过 配电系统中的铅和铜规则（LCR）； 根据明尼苏达州交通部的强制令 健康 第90百分位铜=1.8至2.3毫克/升>>需要1.3毫克/升； 高铁浓度 -2.6 mg/L铁； 分布系统内的生物生长； 消毒副产物形成 -满足计划的第2阶段要求（40THM/30HAA）；和 两组之间的氯需求量存在显著差异 使用相同供水的两列处理机组 -西部工厂:氯需求量~氯剂量 -东部工厂:氯需求量约为氯剂量的7倍以上。两列处理机组均配有成品 水的pH值调整，以及生物过滤过程 要求、生物过滤器启动和生物过滤效益。包括表格、数字。

This powerpoint presentation begins by providing a brief overview of the water treatment plant in Hutchinson, Minnesota. Key study issues include the following: exceeding copper corrosion standards as defined in the Lead and Copper Rule (LCR) in distribution systems; city under Enforcement Order from Minnesota Department of Health, 90th Percentile Cu = 1.8 to 2.3 mg/L >> 1.3 mg/L required; high iron concentration - 2.6 mg/L Fe; biological growth occurring within distribution system; disinfection byproduct formation - meet projected Stage 2 requirements (40THM / 30HAA); and, chlorine demands were significantly different between the two treatment trains using the same water supply - West Plant: Chlorine Demand ~ Chlorine Dosage - East Plant: Chlorine Demand ~ 7+ times Chlorine Dosage. Two treatment trains are presented with finished water pH adjustment, along with biological filtration process requirements, biological filter start-up, and biological filtration benefits. Includes tables, figures.