Inactivation of Legionella with the DiaCell® water treatment technology
Legionella constitutes a new and increasingly stronger con-tamination risk many of water systems, such as cooling towers or hot sanitary water distribution networks. European certifica-tions impose concentration limits of 1’000 Cfu/mL , waters with higher levels must be treated. At levels higher than 100’000 Cfu/mL the installations must be stopped and disin-fected immediately. Many disinfections systems are used to prevent such contamination, by heat treatment (T>70°C) or chlorine injection, but water system managers and lawyers today are looking for a non-chemical solution  to promote environmental protection. The topic of this work is the evalua-tion of inactivating Legionella in typical tap water by means of the non-chemical DiaCell technology.