METHOD AND APPARATUS FOR STERILIZING HYDROPONIC CULTURE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus which can stably sterilize a hydroponic culture medium without releasing ozone having a risk which causes growth impairment of a plant, such as chlorosis (whitening), with high concentration into the air.SOLUTION: In a hydroponic culture medium 3, a culture medium is sterilized without substantially producing ozone by generating discharge in air bubble by a water dielectric barrier discharge using the gas which contains rare gas, such as at least helium or argon, as the gas for an electric discharge.SELECTED DRAWING: Figure 1