Disinfection of Hospital Water

Osorno has successfully applied chlorine dioxide disinfection technology to the treatment of water distribution systems in hospitals. Medical specialists determined that the legal limit for chlorination residuals (1 mg/l) was insufficient to disinfect newly connected pipes. The bacteria Pseudomonas spp. were used as a proxy for infection danger to patients. Initial samples from the water distribution system indicated the presence of bacteria (Pseudomonas spp.). Following treatment with chlorine dioxide, these levels dropped to zero.  Given the immune-suppressed condition of many hospital patients, infection via airborne bacteria from faucets and flushing toilets is a concern.  Chlorine dioxide disinfection technology is ideally suited to treating water in hospitals, care homes and other facilities that cater to patients with suppressed immune systems

Alberta Children’s Hospital, Calgary, Alberta

Osorno disinfected the distribution system of the then newly-built Alberta Children’s Hospital in August 2006, before the first patients were admitted in September 2006. Despite the high level of free chlorine (1 mg/l) in the water supplied by the City of Calgary, and a working UV disinfection system, high levels of Pseudomonas spp. were found at many faucets. Osorno flushed the complete piping system by adding 1 mg/l chlorine dioxide, and bacteria levels dropped to zero at all faucets. Chlorine dioxide is effective at combating bacteria, viruses and protozoans, including multiple drug resistant (MDR) microbes, commonly found in hospital settings.

South Health Campus, Calgary, Alberta

Osorno disinfected the distribution system of the newly built South Health Campus  in 2012. Chlorine dioxide disinfection was applied to all water distribution and circulation systems of the hospital, including potable water, hot water, and toilet flush water. The chlorine dioxide application performance was confirmed by third party bacterial testing.

Chlorine dioxide is sufficiently stable in hot water systems to prevent the development of Legionella bacteria, which was a concern of the medical authorities in this project.