Control of Legionella
August 1st 2007

Fran House – marketing manager, Severn Trent Services discusses how Chlorine Dioxide has been used an a control method for Legionella in Italian hospitals. Everyone expects to leave hospital feeling better than they did when they arrived.However, the combination of hot and cold water systems, along with mazes of pipe work, provides the ideal opportunity for the development of the Legionella bacteria.The weakened immune systems of hospital patients, places particular importance of controlling and managing the risks associated with Legionella and Legionnaires disease.

Ranging from 2g/day to 10g/hour, the GS4000 unit is particularly suited to Legionella control in small applications such as hospitals, hotels, office buildings and industrial premises.The new generator has extended the current range of chlorine dioxide generators from Severn Trent Services from 2g/day through to a maximum generation capacity of 10kg/hour of the G4000 unit.

Severn Trent Services (STS) has supplied chlorine dioxide generators to two Milan hospitals.As part of these contracts, STS is undertaking management and maintenance of the units to enable continuous development of the product range.

After only a few weeks of treatment, the GS4000 had successfully reduced the Legionella count to below the Italian national limit. Six months after installation, the level of contamination has remained under the legal requirement with Legionella levels under control at both sites.