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A pulsed discharge plasma in water and in contact with water have been attracting much attention as a promising technology in various fields such as agriculture and environmental remediation. The pulsed power technology enables the instantaneous production of non-thermal plasma which produces various chemical species, such as hydroxyl radicals and ozone. These species play an important role in sterilization effect and the decomposition of organic compounds in wastewater. In this paper, characteristics of plasma discharge inside bubble generated using a pulsed power generator and chemical are described. The decomposition of persistent organic compounds such as 1,4-dioxane, formic acid and dichloromethane by the plasma discharge are demonstrated for environmental application. A nutrient solution treatment system using plasma is developed for practical use in hydroponics for agricultural application. Its performance of enhancement of plant growth rate and inactivation of bacteria in nutrient solution are demonstrated.

Agricultural and Environmental Applications of Plasma in Water Generated by Pulsed Power Generator