Abstract: A method to disinfect a porous solid medium, such as soil, includes the steps of embedding a plurality of electrodes into the porous solid medium and applying a plurality of alternating current voltage pulses between the electrodes. The voltage pulses have a peak voltage of at least 10 kilovolts and are of an intensity and duration effective to generate a quantity of ozone. The ozone is produced in quantities sufficient to disinfect the porous solid medium.

Abstract: There is disclosed an ozone generator having enhanced ozone generating capabilities. A cryogenic stream of oxygen is irradiated with a high voltage electron beam that converts a portion of the oxygen into ozone. When the oxygen stream is liquid, conversion rates of up to 33% are achieved. Separation of ozone from oxygen is achieved by exploiting physical properties. In one embodiment, a gaseous mixture is at a temperature between 90 K and 161 K. A condenser coil condenses the ozone to a liquid. The ozone may be directed to a reaction chamber containing a surface increasing medium, such as porous inert beads, to remediate air borne biological and organic contaminants.