抄録
Recently, it has become a social problem that the disease infection by the pathogenic microorganism spreads all over the world. Therefore, it is expected to establish an advanced sterilization method which has the advantages of simple configuration and ability to operarte at atmospheric pressure. We studied the sterilization effects of the steam plasma flow at atmospheric pressure on bacteris. We developed a plasma source of the steam plasma flow at atmospheric pressure in a quartz tube of 8mm in diameter and clarified its plasma characteristics and sterilization efficacy against Geobacillus Stearohermophilus. A flow rate of the steam plasma flow of atomospheric prsssure in a tube is 8.1l/min which equals to the velocity of 2.7m/s. The operating condition as 6.2mA, the average discharge power of 3.0W at 13kV_<pp>, and the applied frequency of 3kHz. Under this condition, a good sterilization result of G. Stearohermophilus was obtained for the operation time of 30 minutes.
