在热水器上测试了各种军团菌消毒处理的效果 配电系统（HWDS）试验装置。结果清楚地表明，绝大多数 网络中军团菌的数量固定在管道表面的生物膜中（超过 每个循环98%）。化学处理（连续氯化、过氯化、， 过氧化氢和过氧乙酸混合）通常用于根除 热水配送网络中的军团菌似乎不足以根除这种疾病 生物膜中的细菌。不幸的是，生物膜中含有绝大多数病原体 在HWDS中，而立法仅限于水中的军团菌浓度 阶段热处理似乎能有效地消毒大部分生物膜，但 似乎促进了生物膜的重新形成- 增长也是如此。然后得出结论，最佳解决方案 为了防止热水分配系统中的军团菌污染，需要 完美控制网络中的温度（所有点的温度>55摄氏度）。 然而，在许多情况下，很难进行这样的控制，因此在必要的时间内 进行网络改造，是控制军团菌扩散的最佳解决方案 似乎正在应用处理冲击（管道功能中的热处理或氯化处理） 特征）。这些处理之后必须进行连续氯化 控制并配备报警系统。这项研究表明，生物膜取样 必须在热水分配系统中安装设备，以预防军团菌 并正确确定处理的效率。 包括21个参考文献、表格和图表。

Efficiency of various treatments of disinfection against Legionella were tested on a Hot Water Distribution System (HWDS) pilot unit. The results demonstrated clearly that a large majority of Legionella in the networks were fixed in the biofilm at the surface of the pipe (more than 98% for each loop). Chemical treatments (continuous chlorination, hyperchlorination, hydrogen peroxide and peracetic acid mixing) commonly used for the eradication of Legionella in hot water distribution networks, appeared to be inadequate for eradicating the bacteria in the biofilm. Unfortunately, the biofilm contained a large majority of the pathogens in an HWDS whereas legislation is only restricted to the Legionella concentration in the water phase. Thermal treatment appeared to be efficient to disinfect the majority of the biofilm but seemed to promote the biofilm re-growth as well. It was then concluded that the best solution to prevent Legionella contamination in a hot water distribution system would be to have perfect control of the temperature in the networks (temperature > 55C at all points). Nevertheless, in many cases it is difficult to have such control, so during the time necessary to do the network modifications, the best solution to control the Legionella proliferation appeared to be applying a treatment shock (thermal or chlorination in function of pipe characteristics). These treatments must be followed by a continuous chlorination totally controlled and equipped with alarm systems. This study demonstrated that biofilm sampling devices must be installed in hot water distribution systems to anticipate Legionella contamination and correctly determine the efficiency of the treatments. Includes 21 references, table, figures.