Decontamination method and system, such as an in-situ groundwater decontamination system, producing dissolved oxygen and reactive initiators

A system for decontaminating contaminated groundwater in-situ, comprising:

• a well having a bottom elevation below a water level of the contaminated groundwater;
• a pump having an intake, the intake positioned in the well below the water level of the contaminated groundwater;
• an electrolytic cell enclosed in a housing, the housing positioned above and coupled to the pump, wherein the pump draws contaminated groundwater into the intake and circulates the contaminated groundwater through the electrolytic cell;
• and
• a gas distribution chamber positioned above the electrolytic cell, the gas distribution chamber coupled to the housing, the distribution chamber having an outlet for exiting circulated groundwater.

A method of facilitating accelerated in-situ bioremediation of a body of water, comprising:

• positioning an in-situ oxygen generating device having an electrolytic cell in the body of water;
• pumping in-situ fluid from the body of water into the electrolytic cell of the oxygen generating device;
• passing an electric current through the electrolytic cell to create a process liquid in which hydrogen gas and oxygen gas are generated;
• moving the process liquid through a gas distribution chamber over a sufficient distance to allow the oxygen gas to dissolve into dissolved oxygen;
• and
• returning the process liquid to the body of water;
• wherein the body of water is an underground aquifer and the method further comprises drilling a borehole to form a well into the aquifer wherein a bottom of the borehole extends below a water table.

A method of facilitating accelerated in-situ bioremediation of a body of water, comprising:

• positioning an in-situ oxygen generating device having an electrolytic cell in the body of water;
• pumping in-situ fluid from the body of water into the electrolytic cell of the oxygen generating device;
• passing an electric current through the electrolytic cell to create a process liquid in which hydrogen gas and oxygen gas are generated;
• moving the process liquid through a gas distribution chamber over a sufficient distance to allow the oxygen gas to dissolve into dissolved oxygen;
• returning the process liquid to the body of water;
• and
• inserting a casing into a well wherein a selected lower portion of the casing is perforated to allow liquid to flow through the casing.