Reduction efficiency in Bacillus cereus by air purifiers

Abstract

This experimental research design study aims to determine the reduction of B. cereus in a natural baseline compared with the effectiveness of air purifiers by photolysis, bioplastic film filtration, and photocatalytic oxidation at 5-120 minutes contact time. This investigation was performed in the experimental cabinet. Air purifier has been inspected to ensure unobstructed airflow in both directions. The result found that the reduction efficiency of bacteria in the natural baseline was 90% at 90 minutes, while photolysis by UVC showed at 45 minutes. The filtration by bioplastic film PLA and PLA/TiO2 showed similar results, that decreased bacteria by 90% at 90 minutes, as exhibited in the natural baseline. The combination of bioplastic film PLA with UVC presented a 90% reduction of bacteria after 80 minutes. Whereas the combined bioplastic film PLA/TiO2 has efficacy at 45 minutes. These data can conclude that the photocatalytic oxidation with bioplastic film PLA/TiO2 and UVC photolysis have high efficiency to decrease bioaerosol, especially, bacteria.