Microplasma treatment for tobacco leaves drying
Annotation
The aim of this work is to develop a new technology of preliminary electrical treatment using filamentary microplasma for drying tobacco leaves. Virginia 202 tobacco leaves are used as an object of research. Tobacco leaves were dried naturally and analyzed for their microstructural changes, physical, and mechanical properties as well as chemical composition. Filamentary microplasma treatment was carried out at an electric field of the strength E = 600 kV/m, a single pulse duration of 40 microseconds, and a pulse repetition rate of 100 Hz. It was found that filamentary microplasma pretreatment allowed to reduce the duration of tobacco leaves drying by 32% and 12% to achieve an equilibrium moisture content when treating the vein and the whole leave surface, respectively. Treatment with filamentary microplasma showed a positive effect on the increase in fiber yield, when evaluating physical and mechanical properties, by 7.3 and 13.3% when treating the vein and the entire plate of the tobacco leaf, respectively. Chemical analysis showed that pretreatment with filamentous microplasma improved the carbohydrate-protein ratio, increased the Schmuck ratio from 0.8 to 1.3 when processing the tobacco leaf vein, but reduced the Schmuck ratio to 0.3 when processing the entire tobacco leaf. From the obtained data, it can be concluded that the technology of preliminary filamentary microplasma treatment is promising for industrial applications, in particular when middle vein of a tobacco leaf is treated and can significantly reduce the drying time and affect the qualitative composition of final product.
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