Pseudomonas aeruginosa in drinking water installations

Pseudomonas aeruginosa on agar plate

Pseudomonas aeruginosa is one of the most important facultative pathogens. In practice, this microorganism frequently occurs after construction measures in the drinking water network and in newly laid drinking water pipes. Pseudomonas aeruginosa can also cause problems in drinking water installations (e.g. in hospitals). In many cases, conventional elimination measures are not sustainable.

Pseudomonas aeruginosa in drinking water systems – requirements for growth and sustainable countermeasures

The environmental bacterium Pseudomonas aeruginosa is one of the most important facultative pathogens. There is still a lack of extensive process understanding of the behaviour of Pseudomonas aeruginosa in drinking water systems at present which means that it is difficult to derive any targeted measures.

As part of this DVGW research project, we therefore investigated the growth requirements of Pseudomonas aeruginosa and measures for its elimination.

The comprehensive series of investigations showed that Pseudomonas aeruginosa in pure culture can multiply substantially in drinking water. However, the existence of an autochthonous mixed biocoenosis at the same time introduces notable competition.

Investigating different materials revealed that within a short period, all material surfaces become heavily populated with Pseudomonas aeruginosa, with the greatest colonisation being on sealing materials. The concentration of Pseudomonas aeruginosa on the surfaces declined gradually in the flow, although it could be detected for a long time.

Testing the disinfection measures showed that chlorine and chlorine dioxide are also effective disinfectants against Pseudomonas aeruginosa in the water phase. With the exception of the investigated sealing materials or materials without general W 270 approval, the disinfectants were generally also effective on material surfaces. It was not possible to eliminate Pseudomonas aeruginosa on surfaces using flushing measures.

Publications

Hambsch, B., Hügler, M., Korth, A., Petzoldt, H.: Pseudomonas aeruginosa in Trinkwassersystemen - Wachstumsansprüche und nachhaltige Gegenmaßnahmen [Pseudomonas aeruginosa in drinking water systems – requirements for growth and sustainable countermeasures]. DVGW energie/wasser praxis 67, No.5, p. 98-106 (2016)

Hambsch, B., Hügler, M., Korth, A., Petzoldt, H.: Pseudomonas aeruginosa in Trinkwassersystemen - Wachstumsansprüche und Gegenmaßnahmen. Veröffentlichungen aus dem Technologiezentrum Wasser [Pseudomonas aeruginosa in drinking water systems – requirements for growth and sustainable countermeasures. Publications from TZW], Volume 73, p. 1-100 (2016)

Hambsch, B., Hügler, M.: Pseudomonas aeruginosa in Trinkwasser-Installationen: Ursachenforschung und Gegenmaßnahmen [Pseudomonas aeruginosa in drinking water installations: root cause analysis and countermeasures]. Management & Krankenhaus kompakt, Hygiene, p. 17 (2015)

 

 

 

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