[13p-A205-1~7] Forefront of elucidating the mechanism of plasma-induced biological reactions

[13p-A205-7] Mechanism of pulsed power applications in agriculture and food processing

〇Koichi Takaki^1,2, Katsuyuki Takahashi^1,2 (1.Iwate Univ., 2.AIC)

Keywords:Pulsed power, Plasma, Agriculture

Repetitively operated compact pulsed power generators with a moderate peak power were developed for the applications in several stages of agriculture and food processing. Pulsed high-voltage produces intense high-electric field which can cause some biological effects such as stress response (stimulation) and electroporation. Types of pulsed power that also have biological effects are caused with gas and water discharges which include reactive species such as ROS and RNS. The repetitive pulse discharge was used for promoting growth of the vegetables and fruits. The growth rate of the vegetables increased by the plasma irradiation to the hydroponic solution. The pathologenic bacteria number density in the liquid fertilizer decreased the pulsed power discharge treatment. The ms-pulse high-voltage improvement of mushroom yield. The yielding rate of Shiitake mushroom was also improved with the high-voltage stimulation in fruit-body formation phase. The electrostatic effects can contribute to remove airborne bacteria and fungi spore from the storage house and container. This removal contributes to reduce the infection risk with fungi and bacteria. Some kinds of fruit and vegetable emit the ethylene gas which accelerate a degradation of other kind fruits and vegetables. The repetitive ms-pulse DBD remediation of air and liquid to inhibit degradation of agricultural products via ethylene removal via oxidization reaction.