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Managing Legionella

METHOD OF REDUCING THE RISK OF LEGIONELLA AND OTHER WATER-BORNE BACTERIA

1. THERMAL
Increasing scaling in calorifiers and biofilm in the water system provides nutrients for Legionella, which cannot survive above 60°c. However, it is difficult to maintain constant temperature levels on the hot water return.

To prevent scalding at water outlets, thermostatic mixing valves (TMVs) are required, although TMVs themselves can act as breeding sites for Legionella and other bacteria. TMVs are also expensive to service and maintain.

Protecting water system against Legionella and other bacteria by maintaining water supply above 60°c and using TMVs to achieve lower temperatures for day-to-day use is a needless waste of energy (and money).

2. CHEMICAL
Hazardous chemicals including Sodium Hypochloride (Chlorine), can disturb rather than remove biofilm, risking subsequent outbreaks. Legionella and other water-borne bacteria can hide in scale and biofilm, which is not penetrated by most chemicals. Indeed, after chlorination, bacteria can re-emerge.

Chlorine can "gas-out" and dissipate at warmer temperatures, compromising effectiveness in the water system. Furthermore, the chemicals used in water systems are toxic and hazardous as well as antisocial in taste and odour. Compliance with hazardous substance regulations (COSHH) is expensive.

3. COPPER-SILVER IONISATION
The cost of Copper-Silver Ionisation can be set against the cost of thermal and chemical options making Tarn-Pure ionisation systems the most cost efficient - and environmentally friendly - of attacking legionella and other water-borne bacteria. It is the most effective solution to manage water-borne bacteria.

Copper-Silver Ionisation is the most environmentally responsible approach to water disinfection. It saves the needless energy consumption of constant hot water (thermal) and excessive use of hazardous chemicals such as chlorine.

Since 1981, Tarn-Pure has pioneered Copper-Silver Ionisation in the UK and overseas, initially focusing on swimming pools, wherein ionisation lessens the quantity of chemicals required, with benefits to human skin, eyes and hair.

Tarn-Pure products has been chosen by research scientists all over the world as the standard for long-term and other studies into the benefits of Copper-Silver Ionisation. In food processing industries, Tarn-Pure units have been installed in vegetable and salad washing lines, replacing chemical biocides, such as chlorine and citric acid. Tarn-Pure systems are fully compliant with UK Health and Safety Directive ACOP L8: "Legionnaires's disease - The control of Legionella bacteria in water systems"