Study on the disinfection efficacy of compound disinfectant of peracetic acid

Objective To study the disinfection efficacy of compound disinfectant of peracetic acid. Methods Suspended liquid quantitative sterilization test and metal corrosion test were carried out with different concentrations of disinfectant compound. Results The killing rate of Bacillus subtilis var.niger spores exposed to peracetic acid 500 mg·L -1 or available chlorine 300 mg·L -1 for 15 minutes was 99.94% and 97.91% respectively, while that of the spores exposed to the compound disinfectant containing both of them reached 100%. The influence of organic substances on the bactericidal efficacy of this compound disinfectant was less than that on the bactericidal efficacy of the single ingredient. The corrosive effect of the compound disinfectant on the metals was milder than that of peracetic acid, but heavier than that of dichlorodimethylhydantoin. Conclusions Disinfectant efficacy of compound disinfectant increases clearly, while metal corrosiveness decreases.