Document Type : Research
Author
Department of Physics, Faculty of Science, Payame Noor University, Tehran, Iran
Abstract
A B S T R A C T
in recent years, using cold plasma as non - thermal and non - thermal environments has attracted a wide attention in the field of sterilization and control of stored food pests. in this research, the performance of cold plasma system of dielectric barrier (DBD) in biological inactivation of important stored pests, with concentration on physical - mathematical analysis of process and investigating the effect of electrical and geometrical parameters and for storage pest, four point cowpea weevil, was studied. the governing equations of the reduced field, electron density and the rate of production of active oxygen and nitrogen species are analytically studied and their direct relation with the efficiency of the pest is explained. the results show that increasing the applied voltage and reducing the distance of the electrodes will result in an exponential growth in the density of electrons and the increase in ros production rate; species that play a major role in the destruction of cell walls, proteins and dna of pests. the kinetic analysis of pest population decreased that the percentage of pest was limited to time of treatment and electrical parameters of the system so that about 100 % of adult insect pests were available, even for a short period of about s4. comparison of different plasma structures showed that the DBD system has a higher efficiency than the local plasma, due to the uniformity of field and appropriate volume covering.
Keywords
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