Abstract
AbstractThis paper examines the application of atmospheric pressure microwave plasma (APMP) for disinfection of water contaminated by Bacillus globigii spores. The results were most promising when He−H2 or O2 were used as plasma gases. The most probable cause for disinfection due to He−H2 plasma can be attributed to the presence of germicidal ultraviolet radiation. On the other hand, the presence of metastable oxygen species (which are very reactive) in the oxygen plasma effluents was attributed as the most likely cause of sterilization of Bacillus globigii spores. By choosing the correct combination of gas mixtures and microwave power level, the authors were able to achieve greater than log5 inactivation. AMPM may be a suitable alternative to traditional disinfection techniques (e.g. chlorination) when they are difficult or impracticable.
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