Atmospheric continuous filament discharge plasma (ACFDP) applied to crop sterilizatinon

Summary form only given. The ability of killing some microorganisms by atmospheric pressure glow discharges (APGD) has been demonstrated in a number of previous researches and can be extensively applied to medical treatment, sanitation, environmental protection and food reservation. At present, we designed a set of plasma device, which produce the dielectric barrier discharge plasma between the coaxial bar electrode and barrel electrode. This device adopts alternating current supply of 10 kHz to produce atmospheric continuous filament discharges plasma (ACFDP) at the gap distance of 5 mm and voltage of 15 kV. Because of the high exciting frequency, the plasma is generated constantly. We install nine of these devices in parallel and the applied power required to sustain stable discharges is around 400 W. When working gas (nitrogen, air, helium, etc) is inflated at a relatively high speed, the particle density decreases and the evenness degree of plasma increases, which is similar to the glow discharge. We use this plasma to treat some bacteria and fungus in crops, especially in wheat and the sterilization result is demonstrated to be remarkable