Publication: Performance evaluation of a non-thermal plasma-based corona discharge system with high electric field intensity for airborne pathogen removal
0
0
Issued Date
2025-12-01
Resource Type
eISSN
25901230
Scopus ID
2-s2.0-105021082349
Journal Title
Results in Engineering
Volume
28
Rights Holder(s)
SCOPUS
Bibliographic Citation
Results in Engineering Vol.28 (2025)
Suggested Citation
Santalunai S., Pakprom J., Thongsopa C., Janpangngern P., Chaipanya P., Santalunai N., Santalunai S. Performance evaluation of a non-thermal plasma-based corona discharge system with high electric field intensity for airborne pathogen removal. Results in Engineering Vol.28 (2025). doi:10.1016/j.rineng.2025.108072 Retrieved from: https://hdl.handle.net/20.500.14740/51640
Corresponding Author(s)
Other Contributor(s)
Abstract
This study examines a corona discharge system that produces non-thermal plasma using a high intensity electric field established between a flat plate and a sharp-pointed electrode. The plasma conditions contributed to the generation of reactive chemical species, especially ozone (O<inf>3</inf>) and nitrogen oxides (NO<inf>X</inf>), acknowledged for their potent antimicrobial properties. Controlled laboratory experiments occurred using Bacillus subtilis spores as a standard biological indicator organism to assess sterilization efficacy because of their established resistance and safety for laboratory applications. The results demonstrated a clear correlation between electric field intensity and the concentration of reactive species. In the Electric Field Strength regime (1136.36kV/m), O₃ and NOₓ concentrations attained 9.40 ± 0.19 ppm and 23.98 ± 1.30 ppm, respectively, resulting in 98.99 % inactivation of B. subtilis within 5 min and total sterilization (100 %) within 10 min at an airflow rate of 40 L/min. The findings illustrate the capability of corona discharge-based plasma systems as safe, residue-free, and environmentally sustainable methods for real-time air disinfection in enclosed, high-risk conditions.