Development of New Non-Heating Sterilizer for Dried Micropowder Foods
| Autor: | Kouzou Fujita, Norio Takakura |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 78:341-348 |
| ISSN: | 1884-8354 0387-5024 |
| DOI: | 10.1299/kikaic.78.341 |
| Popis: | For non-heating sterilization, the use of various radiations including gamma-ray irradiation has been approved in the United States, Europe, and China, whereas legally prohibited from the safety perspective in Japan. Previously we reported the development of a fine grinder for dry tea leaves, implying the occurrence of sterilizing activity that has not been found in conventional grinding procedures. The present study aimed to elucidate the mechanism of occurrence of sterilizing activity in the use of the developed apparatus “Batch-type Vertical Rotation Planetary Ball Mill (VPBM)” and to realize a non-heating sterilizer for Dried micro powder foods. First, a method of enhancing sterilization was devised and successfully tested in a validation experiment. Subsequently, the generation of ultraviolet rays by the enhancing method and enhanced sterilization were assumed and verified in a qualitative validation experiment. As the wavelength of relaxation frequency on the gradual extinction of electronic polarization, a dielectric polarization, is within the range from visible rays to ultraviolet rays, it was hypothesized that if similar phenomena (generation and gradual extinction of electronic polarization) occur in the VPBM-specific crushing mechanism, ultraviolet rays may be most probably generated from dried capsules and cell walls of bacteria. Thus, final validation experiments were carried out on dried and pulverized food materials containing a lot of bacteria, with favorable results. Mechanical energy may have been converted into electric energy, then to chemical energy for non-heating sterilization. |
| Databáze: | OpenAIRE |
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