本powerpoint演示文稿首先简要概述了神秘水系统。问题陈述包括以下内容: 符合第2阶段消毒剂/消毒副产品（D/DBP）规则；和 锰和铁的控制。 研究目标包括: 评估预过滤氯对DBP水平的影响；此外，研究减少DBP形成的选项，同时 保持铁和锰的去除。 工作范围包括以下内容: 在不同预滤器条件下对不同植物进行采样的全面研究 Cl₂剂量、DBP和金属分析、收集过滤器 媒体核心；和 氯气需求、动力学、DBP的实验室研究 形成、氯胺化、罐和柱实验。陈述结论表明: 预滤器Cl₂和KMnO₄快速氧化铁和 锰（pH值控制在7.0-7.2）； 低预过滤氯剂量（2 mg/L）会产生类似的效果 与高预滤器一样过滤进水水质条件 氯剂量（6-8 mg/L）；工厂废水DBP的形成与预过滤器成正比 氯剂量； 将预过滤氯从8 mg/L降至2 mg/L 导致工厂废水DBP降低70-90% 锰和铁的形成和短期控制； 35-55天后，导致低预滤氯（2.0 mg/L） 锰的明显释放；和 将预滤器中的氯增加到4-5 mg/L可防止锰中毒 释放，但增加DBP的形成。包括数字。

This powerpoint presentation begins by providing a brief overview of the Mystic Water System. The problem statement includes the following: compliance with Stage 2 Disinfectant/Disinfection Byproduct (D/DBP) Rule; and, control of Mn and Fe. The study objectives include the following: evaluate impacts of pre-filter chlorine on DBP levels; and, investigate options to decrease DBP formation while maintaining Fe and Mn removal. The Scope of Work includes the following: full-scale studies of sampling across plants at various prefilter Cl₂ doses, DBP and metals analyses, collecting filter media cores; and, bench-scale studies of chlorine demand, kinetics, DBP formation, chloramination, jar and column experiments. Presentation conclusions indicate that: pre-filter Cl₂ and KMnO₄ rapidly oxidized iron and manganese (with pH controlled at 7.0-7.2); a low pre-filter chlorine dose (2 mg/L) produces similar filter influent water quality conditions as that of a high prefilter chlorine dose (6-8 mg/L); plant effluent DBP formation directly proportional to prefilter chlorine dose; decreasing the pre-filter chlorine from 8 mg/L to 2 mg/L resulted in 70-90% decrease in plant effluent DBP formation and short term control of Mn and Fe; after 35-55 days low pre-filter chlorine (2.0 mg/L) resulted in an apparent release of Mn; and, increasing pre-filter chlorine to 4-5 mg/L prevents Mn release, but increases DBP formation. Includes figures.