Pulsed ozone sparging for injecting a high volume high-concentration of ozone

A sparging apparatus for treating a contaminated sub-surface comprising:

• (a) an injection point injector for injecting ozone into one or more injection points within said contaminated sub-surface;
• (b) a high pressure ozone source for providing a high pressure ozone gas mixture that comprises an oxygen carrier gas having an ozone gas concentration of about 5 percent or greater by weight of ozone gas;
• (c) a high-pressure pulse storage tank coupled to said high pressure ozone source for temporarily storing said ozone gas mixture, produced by said high pressure ozone source, at maximum tank pressures up to about 100 psig or more;
• (d) a controller for causing a valve to couple said pulse storage tank to an injection point of said injection point injector when injection pressure within said tank reaches a high pressure discharge site-specific set-point for producing an ozone gas pulse, and for thereafter decoupling said pulse storage tank from said injection point when said injection pressure and back pressure from said sub-surface come into equilibrium.

A sparging apparatus for treating a contaminated sub-surface comprising:

• (a) an injector for injecting ozone into one or more injection points within said contaminated sub-surface;
• (b) a high pressure ozone source for providing a high pressure ozone gas mixture having an ozone gas concentration of about 5 percent or greater by weight of ozone gas;
• (c) a high-pressure pulse storage tank coupled to said high pressure ozone source for temporarily storing said ozone gas mixture, produced by said high pressure ozone source, at maximum tank pressures up to about 100 psig or more;
• and
• (d) a controller for causing a valve to
• (d-1) couple said high pressure pulse storage tank to an injection point of said injection when injection pressure within said tank reaches a high pressure sight-specific set-point, and for
• (d-2) thereafter decoupling said high pressure pulse storage tank from said injector for causing groundwater to flow back into sub-surface channels that had been filled with ozone gas, creating mechanical mixing between groundwater and injected ozone thus enhancing contact between oxidizer and contaminants.