本研究评估了紫外线与二次辐射的协同效应 使用模型分配系统的消毒剂。特别是，这项研究雇佣了八名员工 环形反应器（ARs），在水工业中广泛用于评估 代表饮用水分配系统的条件下的生物膜生长。 正在进行残余消毒评估的化学消毒剂是氯 二氧化物、一氯胺和游离氯。结果表明，两者之间存在协同作用 紫外线与化学消毒剂在微生物控制中的作用 饮用水分配系统中的再生。 特别是在含有 紫外线处理过的水二氧化氯（ClO2）和游离氯（Cl2）在不同温度下的表现都更好 减少悬浮异养细菌。当以低或高电压运行时 二氧化氯反应器（经紫外线处理）的消毒残留量大于2-log 未经处理的反应器上异养平板计数（HPC）的减少 紫外线。Cl2反应器（经紫外线处理）导致约2-log的碳还原 未经紫外线处理的反应器上方的HPC。在生物膜减少方面， 紫外线消毒导致约0。 二氧化氯的5对数差 和NH2Cl-ARs。未检测到可测量的紫外线消毒差异 AR接受游离氯。未经化学消毒的人工鱼导致了类似的结果 无论是否存在紫外线消毒，生物膜和悬浮HPC水平 不总的来说，这些发现表明，化学消毒前的紫外线会增强 分配系统中的微生物控制。实际上，这些结果表明 应考虑采用双屏障消毒系统来保护工厂的病原体 和分配系统。 包括10个参考文献和表格。

This study evaluates the synergistic effects of UV coupled with secondary disinfectants using a model distribution system. In particular, the research employs eight annular reactors (ARs), which have been widely used in the water industry for evaluating biofilm growth under conditions representative of drinking water distribution systems. The chemical disinfectants that are being evaluated for residual disinfection are chlorine dioxide, monochloramine, and free chlorine. Results indicate that there are synergistic effects between UV and the chemical disinfectants for controlling microbiological regrowth in drinking water distribution systems. In particular, in the reactors containing UV treated water both chlorine dioxide (ClO2) and free chlorine (Cl2) performed better at reducing the suspended heterotrophic bacteria. When operated with either a low or high disinfection residual the ClO2 reactor (UV treated) resulted in a greater than 2-log reduction in heterotrophic plate counts (HPCs) over the reactor that was not treated with UV light. The Cl2 reactor (UV treated) resulted in approximately 2-log reduction of HPCs over the reactor that was not treated with UV light. In terms of biofilm reduction, UV disinfection resulted in a reduction of approximately 0.5-log difference for the ClO2 and NH2Cl ARs. No measurable difference of UV disinfection was detected for the AR receiving free chlorine. ARs receiving no chemical disinfection resulted in similar biofilm and suspended HPC levels regardless of whether UV disinfection was present or not. Overall, these findings indicate that UV prior to chemical disinfection enhances microbial control in distribution systems. Practically, these results would indicate that a dual-barrier disinfection system should be considered for pathogen protection at the plant and distribution system. Includes 10 references, tables.