为了尽量减少消毒副产物（DBP）的形成，有三种优化方案: 适用于在快速混合之前或快速混合时氯化的常规处理厂，包括: 降低快速混合时投加的氯含量，并重新氯化；移动点 氯化至沉淀池后；或者，切换到不同的pre- 消毒剂/氧化剂。然而，无法实现这些优化目标 破坏通过有效过滤器实现的致病屏障。本报告的目标是: 研究目的是:评估和评估优化预氧化的条件 有效控制DBP；确定预氧化的条件 影响过滤器性能。 试验采用中试规模系统进行。后果 结果表明，降低预氯化剂量并在氯化后重新氯化 沉淀池，以确保目标分配系统的残余物（24小时时为1 mg/L）为 维持，产生较低的氯消耗量（高达50%）和较低的总氯消耗量 三卤甲烷（TTHMs）在24小时后形成（高达29%）。滤波器的两个方面 监测性能:成熟期；稳态浊度。所有剂量 在各种情况下，稳态浊度平均为0.06 ntu。稳态温度升高的趋势 当氯的预氧化剂剂量位置从 快速混合至中絮凝至后沉降。氯的产量也较低 稳态浊度与二氧化氯和高锰酸钾的比较 在快速搅拌时给药。 包括11个参考文献、表格、图表。

To minimize disinfection byproduct (DBP) formation three optimization options are available to conventional treatment plants that chlorinate prior to or at the rapid mix and include: lower the level of chlorine dosed at the rapid mix and re-chlorinate; move the point of chlorination to after the sedimentation basin; or, switch to a different pre- disinfectant/oxidant. However, implementing these optimization objectives cannot compromise the pathogenic barrier achieved by effective filters. The objectives of this study are to: assess and evaluate the conditions under which optimizing preoxidation is effective in controlling DBPs; and, determine the conditions under which preoxidation impacts filter performance. Tests were conducted with a pilot-scale system. Results indicated that lowering the pre-chlorination dose and re-chlorinating after the sedimentation basin such that a target distribution system residual (1 mg/L at 24 hours) is maintained, yielded lower chlorine consumed (up to 50%) and lower total trihalomethanes (TTHMs) formed after 24 hours (up to 29%). Two aspects of filter performance were monitored: the ripening period; and, steady-state turbidity. For all dose scenarios, steady-state turbidity averaged 0.06 ntu. Trends in increasing steady-state turbidities were observed as the preoxidant dose location for chlorine was moved from the rapid mix to mid-flocculation to post sedimentation. Chlorine also yielded lower steady state turbidities compared with chlorine dioxide and potassium permanganate dosed at the rapid mix. Includes 11 references, tables, figures.