STUDY ON GERMICIDAL EFFECT OF COMPOUND HYDROGEN PEROXIDE DISINFECTANT AND ITS EFFICACY IN DISINFECTION OF INDOOR AIR

In order to observe the germicidal effect of compound hydrogen peroxide disinfectant and its efficacy in disinfection of indoor air,quantitative germicidal test and field disinfection trial were used to carry out experimental study.Results: The compound disinfectant composed of potassium iodide 2500 mg/L and hydrogen peroxide 2500 mg/L with a 5 min contact time killed 100% of both Escherichia coli and Staphylococcus aureus in suspension.Aerosol spray of the compound disinfectant composed of hydrogen peroxide 5000 mg/L and potassium iodide 5000 mg/L at a dosage of 8 ml/m~3 followed by closing the door and windows for 30 min killed 99.99% of Staphylococcus aureus,Escherichia coli and Pseudomonas aeruginosa in artificially contaminated indoor air.Aerosol spray of this compound disinfectant with a 30 min contact time killed over 96% of the natural bacteria in indoor air of the operating room of hospital.Conclusions: The compound hydrogen peroxide disinfectant has strong germicidal efficacy and the efficacy of spraying its aerosol in killing the natural bacteria in indoor air can fulfil the requirement of eligible disinfection.