Legionella i tappvattensystem. Förekomst och förebyggnade-en redogörelse.

Abstract

Legionella can be prevented, the question is how. This report is a degree in construction engineering education at Chalmers University in Gothenburg. A comprehensive written publication for Legionella-safe plumbing installations is not available and therefore requested. The purpose of this report is to present preventative measures against Legionella bacteria growth in tap water and in other systems where Legionella bacteria are a potential problem. Technical solutions are presented including how different systems function and what their advantages and disadvantages are. Literatures in the field have been studied and additional information has been gathered through studies of existing projects and technical systems. There are many ways to decontaminate a tap water system that has difficulties with growth of legionella bacteria. These technical solutions range from pure mechanical treatment to addition of chemicals such as biocides. If the problems of Legionella growths are not repeated, the thermal disinfection is a good alternative. If the problem however is repeated and a general increase in temperature in the system does not stop the bacteria growths, then biocides should be used.