초록 ▼

A method and system for removing contaminants for the phreatic zone, also known as the saturation zone, or groundwater. The technique involves gas sparging and oxidation while increasing the surface area for mass transfer by the placing of packing balls into the eductor tube. The system is comprised

A method and system for removing contaminants for the phreatic zone, also known as the saturation zone, or groundwater. The technique involves gas sparging and oxidation while increasing the surface area for mass transfer by the placing of packing balls into the eductor tube. The system is comprised of a means for supplying gas/ozone mixture to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system contains a conduit within the well, which extends below the water table. The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent the water table.

대표청구항 ▼

[ What is claimed is:] [1.] A method for removing contaminants from groundwater, comprising the steps of:providing a well to extend below the water table into the phreatic zone;injecting a gas/ozone mixture into the lower extent of said well to force groundwater up said well causing VOCs to be trans

[ What is claimed is:] [1.] A method for removing contaminants from groundwater, comprising the steps of:providing a well to extend below the water table into the phreatic zone;injecting a gas/ozone mixture into the lower extent of said well to force groundwater up said well causing VOCs to be transferred to rising gas bubbles in addition to oxidation occurring inside said well;providing packing materials with the flow of said groundwater and said gas bubbles up said well for enhancing the surface area for improved mass transfer efficiencies, into said well; andoptionally, separating said gas bubbles from the groundwater with vacuum vapor extraction, at the upper extent of said well. [7.] A System for gas sparging of contaminants from groundwater, which comprises:means for supplying gas/ozone mixture to the lower extent of a well to induce a flow of groundwater and gas bubbles up said well;a conduit within said well, extending below the water table, said conduit having a lower fluid-permeable section below said water table and an upper fluid-permeable section adjacent said water table;an internal pipe or eductor tube contained in said conduit which extends from the top extent of the conduit to the saturation zone;packing balls located between said eductor tube and said means for supplying gas to the lower extent of said well; anda means, located at the top of said conduit, for separating the gas bubbles from the groundwater VOC vapor contained in said gas bubbles.