Keywords
water system
pasteurization
temperature
How to Cite
Abstract
The effectiveness of a pasteurization system in controlling contamination with Legionella has been evaluated in a hospital’s hot water system.
The hospital acquired these equipments because the original system -conventional hot water tanks– had problems in producing and maintaining the distribution temperatures in the hot water circuit.
The study started 11 months after the pasteurizers had been installed. The study consisted on Legionella and temperature controls which were conducted monthly during an 11-month period. Results have proved that a pasteurization system method to be an effective system of instantaneous warming provided that there are adequate conditions (circulation, materials, design, etc.). This system has no effectiveness in old nets or nets with branches and no circulation, as it has been shown in this study in the building of services, where conductions were damaged. In this area, controls of Legionella have improved only after a purging program was implemented, along with the progressive change of damaged distribution pipes.
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