We constructed a single-stage, laboratory-scale electrostatic precipitator (ESP) and evaluated its physical and microbial collection efficacies. Ground rice husk was examined as a representative model of airborne particles carrying microorganisms (bacteria, molds and yeasts). Physical and microbial collection efficacies were evaluated at different voltages applied to the negative discharge electrode without ozone generation. The best collection efficiencies were observed at an applied voltage of-6.0kV, resulting in collection efficiencies of over 90% for the physical sample and 99.95% for bacteria. No molds or yeasts in the ground rice husk passed through the ESP operating at-6.0kV applied voltage. •A laboratory-scale electrostatic precipitator (ESP) was constructed.•Physical and microbial collection efficiencies were evaluated for ground rice husk.•The physical collection efficiency was about 90% at-6kV applied voltage.•The microbial collection efficiency was over 99.95% for bacteria.•Mold or yeast was not detected in the ESP.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering