Using the flash evaporation principle, a 35% hydrogen peroxide solution is simultaneously evaporated into hydrogen peroxide vapor and water vapor. The vaporized hydrogen peroxide diffuses evenly throughout the disinfection space, forming nanoscale micro-condensation on particles and surfaces. This releases highly oxidizing free radicals, which kill bacteria, viruses, spores, and other microorganisms, achieving a high level of disinfection effectiveness (log6 kill rate).