Patent ID: 7476320
Filing Date: 2009-01-13
Classification: B09C

Abstract:
1. A process for in situ groundwater decontamination within a subsurface region of earth comprising: directing a liquid feed stream through a first conduit; injecting a treatment gas into at least one member of the group consisting of the first conduit and a second conduit; discharging the liquid feed stream downwardly from the first conduit through an orifice restriction into the second conduit to form in the second conduit a confined plunging liquid jet gas and liquid contact zone; dissolving at least a portion of the treatment gas into the liquid feed stream in the contact zone to form an enhanced gas concentration liquid stream; passing the enhanced gas concentration liquid stream downwardly from the contact zone; and passing the enhanced gas concentration liquid stream from the second conduit directly or indirectly into the groundwater.