Related Experiment Video
Updated: Aug 24, 2026

Automated Hospital Room Disinfection Utilizing a Novel Aerosolized Hydrogen Peroxide Microdroplet Disbursing Technology
Published on: February 24, 2026
Efficiency of pulsed UV light for microbial decontamination of food powders
1Laboratoire de Génie des Procédés Alimentaires et Biotechnologiques, ENSBANA, Unilever Bestfoods France-Amora-Maille, 21000 Dijon, France.
Abstract:
The aim of this study was to evaluate the efficiency of pulsed light on the destruction of dried microorganisms on fluidized glass beads and to determine treatment parameters (energy level, water activity, final product quality) for process optimization. The applied drying method allowed microorganisms to remain viable on glass beads or dried powdered products with viability yields approaching 100%. The pulsed UV light system enabled an efficient fluidization of food powders, even for granular products (up to 5 mm diameter) and avoided shadowed areas. For Saccharomyces cerevisiae decontamination, the dose effect of UV rays was preponderant with glass beads and quartz plate, and in this case, 58 J/cm2 were required to decrease the microbial population by 7 log. For colored food powders (black pepper and wheat flour), the thermal effect of pulsed light dominated the UV effect.
Related Concept Videos
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Physical Methods for Controlling Microbial Growth: Temperature
Methods of Sterilization I: Physical Methods
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Chemical Agents for Microbial Control
Pasteurization and Food Preservation
Antimicrobial Effectiveness

