Prevention of Airborne Legionnaires' Disease By Formulation of a New Cooling Water for Use in Central Air Conditioning Systems

摘要

How to purify the air-conditioner and its cooling water is a challenging work for an engineer. The objective of this research was to seek quantitative information on the effectiveness of a specific surfactant, Cetyldimethylbenzylammonium Chloride (CDBAC), as a disinfectant against a bacterial indicator Escherichia Coli in cooling water. Various types of cooling water were investigated. The chemicals used for the preparation of the cooling waters included one or more of the following agents: sodium chromate, sodium dicromate, polyphosphate, sodium nitrite, anti-foaming agent, and CDBAC. A new type of cooling water containing CDBAC has been formulated for possible prevention of the air-borne Legionnaire's Disease occurred in central air conditioning systems.