{"id":707,"date":"2025-01-31T09:03:31","date_gmt":"2025-01-31T08:03:31","guid":{"rendered":"https:\/\/www.tb-klade.at\/applications\/kuehlturm-desinfektion\/"},"modified":"2026-08-21T17:08:12","modified_gmt":"2026-08-21T15:08:12","slug":"kuehlturm-desinfektion","status":"publish","type":"page","link":"https:\/\/www.tb-klade.at\/en\/applications\/kuehlturm-desinfektion\/","title":{"rendered":"Biocides in evaporative cooling systems"},"content":{"rendered":"

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Biocides in evaporative cooling systems<\/span><\/h1>[vc_column_text]Assessmenrt of the active ingredients used and recommendations for risk minimisation and procurement[\/vc_column_text][\/vc_column][vc_column width=”7\/12″ tablet_width=”1-2″ mobile_column_order=”1″ grve_css=”{“desktop“:{“margin-bottom“:“0“,“class“:“grve-wpb-1737549085478“},“mobile_landscape“:{“margin-bottom“:“25px“}}”]
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Study commissioned by the Vienna Ombuds Office for Environmental Protection<\/span><\/span><\/h3>[\/vc_column][vc_column width=”3\/4″][vc_column_text]On behalf of the Vienna Ombuds Office for Environmental Protection, the Technisches B\u00fcro Klade investigated the use of biocides in evaporative cooling systems. The aim of the study was to assess the risks of the active ingredients used to human health and the environment and to derive recommendations for operation, procurement and risk minimisation.<\/p>\n

In open circuit cooling systems, biocides are used to prevent or at least limit the formation of biofilms and the proliferation of pathogenic microorganisms – especially Legionella. In addition, chemicals are often added to the cooling water to reduce deposits and corrosion.<\/p>\n

Legionella prefer to multiply at water temperatures between 25 \u00b0C and 45 \u00b0C and find favorable growth conditions in biofilms. In open cooling systems, they can be released as aerosols and inhaled by people in the area. Documented outbreaks of disease, some of which were fatal, illustrate the importance of professional maintenance and operational management.<\/p>\n

The study does not evaluate the effectiveness of the biocides examined against Legionella. This is required for the approved applications. Rather, the focus is on the hazardous properties of the active ingredients, their environmental behaviour and the burdens associated with their use.<\/p>\n

The following questions were examined in particular:<\/p>\n