Plasma Sterilization of Polyethylene Terephthalate Bottles by Pulsed Corona Discharge at Atmospheric Pressure
| Autor: | Satoshi Masaoka |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Spores
Bacterial business.product_category Materials science Atmospheric pressure Polyethylene Terephthalates Public Health Environmental and Occupational Health Analytical chemistry Sterilization Water Pulsed power Applied Microbiology and Biotechnology chemistry.chemical_compound Electricity chemistry Electrode Bottle Polyethylene terephthalate Electric discharge Aspergillus niger Hydrogen peroxide business Electrodes Corona discharge Bacillus subtilis |
| Zdroj: | Biocontrol Science. 12:59-63 |
| ISSN: | 1884-0205 1342-4815 |
| Popis: | A pulsed power supply was used to generate a corona discharge on a polyethylene terephthalate bottle, to conduct plasma sterilization at atmospheric pressure. Before generating such a discharge, minute quantities of water were attached to the inner surface of the bottle and to the surface of a high voltage (HV) electrode inserted into the bottle. Next, high-voltage pulses of electricity were discharged between electrodes for 6.0s, while rotating the bottle. The resulting spore log reduction values of Bacillus subtilis and Aspergillus niger on the inner surface of the bottle were 5.5 and 6 or higher, respectively, and those on the HV electrode surface were each 6 or higher for both strains. The presence of the by-products gaseous ozone, hydrogen peroxide, and nitric ions resulting from the electrical discharge was confirmed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|