WATER SYSTEM SAFETY
Above: Klarolaks was recently used to bring down Legionella counts to non- detectable rates at an NHS respiratory centre, pictured. Right. A Klarolaks dosing set-up.
and additional chemical use, while also preventing resistant strains developing. It is also worth noting that Klarolaks can be used for shock dosing, as well as low-level online constant dosing. High levels of Legionella within a
water system following sampling would suggest that the routine measures already deployed to prevent the bacterial growth are no longer effective. As Legionella bacteria can spread quickly under the right conditions, particularly when water temperatures range from 20-45 °C, a system disinfection may be required. If the bacterial issues are not rectified following a shock dose, constant online low-level dosing may be required as a long-term preventative solution. Klarolaks was tested by Melbec
Microbiology to validate compliance with BS EN 13623 for Legionella control. At 3 ppm of active Chlorine Dioxide concentration, Klarolaks met the log reduction requirement with a contact time of 60 minutes for Legionella pneumophila in buffered ferrous hard
water. For Pseudomonas aeruginosa, Klarolaks met the log reduction requirement at a product concentration of 5 ppm when diluted in synthetic hard water. The chemistry of Klarolaks delivers chlorine dioxide via an equilibrium reaction, recycling chlorite back into Chlorine Dioxide. The whole reaction is contained within the complex, therefore minimising any potential for the formation of gaseous chlorinated by-products, while the reprocessing nature of the reaction means less product is needed overall. Whereas sodium hypochlorite and
generated Chlorine Dioxide gas off at around 40 °C, and are therefore ineffective above this temperature, Klarolaks will operate effectively in temperatures up to 70 °C. Combined with the fact that Klarolaks remains active in turbulent environments, and can be applied directly into a tank without losing any chlorine dioxide through gassing off, it proves a step change in hospital and clinical settings, where water often sits at
temperatures above 50 °C, and can be delivered in spray applications.
Key benefits of Klarolaks Among the key benefits of Klarolaks are: n Klarolaks is highly stable, releasing minimal vapour across a wide temperature and pH range, and is safer and easier to transport and store, and suitable for a wide range of applications.
n It can be dosed directly into a water supply using a single dosing pump and flowmeter, negating the need for costly generating units, storage, and mixing of hazardous precursor chemicals.
n Compared with traditional water treatment chemicals, Klarolaks is less corrosive to water systems, reducing the need for maintenance and system downtime.
n The cyclical nature of the equilibrium reaction allows for lower dosing. The drastic reduction in chemical usage reduces expenditure, due to the need for fewer deliveries and reduced storage capacity, and less wastage in use.
June 2024 Health Estate Journal 57
AdobeStock / Dzmitry Halavach
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