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| Number | Title | Issue Date |
| 8132987 | Method for remediating contaminated land A method for remediating land contaminated by a combustible material, in particular, land contaminated with non-aqueous phase liquids (NAPLs), which includes the steps of locating a subterranean volume of combustible material such as a DNAPL in land to be remediated... | 03/13/2012 |
| 7360966 | Methods and systems for remediating contaminated soil A system and method for remediation of contaminated soil are provided. The system comprises a soil remediation cell of contaminated soil and a plurality of multi-functional conduits located within the contaminated soil. Each multi-functional conduit defines a reacti... | 04/22/2008 |
| 7293532 | Heavy oil extraction system An efficient high-temperature water vapor generator is used to heat heavy oil located in an underground cavity, thereby reducing the viscosity of the oil and enabling the oil to be pumped to the surface. The vapor generator includes a combustion chamber and a surrou... | 11/13/2007 |
| 7290959 | Electrode heating with remediation agent A remediation method and system is disclosed. A plurality of conductors is installed into the subsurface to introduce electrical current to produce heat in the subsurface. One or more agents are released into the subsurface to cause or accelerate the decomposition o... | 11/06/2007 |
| 7244401 | Apparatus for separation of constituents from matrices The present invention provides an apparatus useful for the separation of hazardous and non-hazardous organic and inorganic constituents from various matrices. A method of separating such constituents is also provided. ... | 07/17/2007 |
| 7175366 | Device, system, and method for remediation of contaminated soil A system, method, and devices for remediating soil of an area of land. The devices are partially inserted into the soil within the area. The devices have vent holes fluidically coupling each device to the soil. A hot fluid is circulated through the devices to heat t... | 02/13/2007 |
| 7019190 | Soil remediation system A process and apparatus for energy efficient remediation of soil contaminated with hydrocarbons, including desorbing the hydrocarbon contaminants from a bed of the soil by thermal desorption in a treated desorption chamber (20) and thereafter combusting the c... | 03/28/2006 |
| 6957930 | Apparatus to form columns of granular material Apparatus to install small diameter columns of granular material in soil which includes rotating hollow shaft mandrel with external projections to aid mandrel advance into the soil and define the size of the cavity formed in the soil, the cavity being filled with gr... | 10/25/2005 |
| 6951436 | Thermally enhanced soil decontamination method A method is provided to remove contaminants from contaminated soil. The method may include withdrawing vapors from a vapor extraction well, estimating the amount of water vapor removed from the contaminated soil in the vapors being withdrawn from the vapor extractio... | 10/04/2005 |
| 6805518 | Method of in situ soil remediation for volatile organic contaminants A preferred method of soil remediation in which contaminant organic compounds are removed from soil by a sequential process in which the bulk of natural and contaminant organic compounds are stripped from the soil by hot air injection, followed by applying a strong ... | 10/19/2004 |
| 6767163 | Plasma process and appropriate equipment for the removal of hydrocarbons contained in the sludge from petroleum storage tanks and/or the treatment of residues containing hydrocarbons A plasma process and equipment for eliminating toxic or hazardous organic compounds from different materials, particularly petroleum and oil contaminated soils. The process and equipment can also be used to remove the hydrocarbons contained in the sludge formed at t... | 07/27/2004 |
| 6632047 | Heater element for use in an in situ thermal desorption soil remediation system An in situ thermal desorption (ISTD) soil remediation system may be used to remove or reduce contamination within soil. Heat may be transferred to the soil from resistively heated, bare metal heater elements. The heater elements may be placed directly wit... | 10/14/2003 |
| 6596142 | Electro-thermal dynamic stripping process A process is provided for vaporizing volatile contaminants present in soil and removing the contaminant vapors. The process involves heating the soil by passing current between electrodes buried in the soil and simultaneously injecting water through the e... | 07/22/2003 |
| 6543539 | Perforated casing method and system A perforated casing may be placed within contaminated soil. Perforations within the casing may be covered during insertion of the casing into the ground. Covering the perforations may inhibit plugging of the perforations during installation. Covering the ... | 04/08/2003 |
| 6485232 | Low cost, self regulating heater for use in an in situ thermal desorption soil remediation system An in situ thermal desorption soil remediation system may be used to remove contamination from soil. Heat may be applied to the soil by metallic strip heaters that have large cross sectional areas as compared to conventional heater elements. The strip hea... | 11/26/2002 |
| 6464430 | Soil decontamination apparatus and method A soil decontamination apparatus includes a pug mill with twin, side-by-side augers or shafts with paddles moving the soil along a treatment path. A roof over the pug mill includes burners directing flames toward the soil as it is moved through the device... | 10/15/2002 |
| 6416251 | Process for the stabilization of soluble chromium contaminated solid by down draft sintering The invention relates to a process for the stabilisation of soluble chromium in contaminated solids by down draft sintering by mixing chromium contaminated solids with different proportions of CaO, MgO, Al2 O3, SiO2, SO | 07/09/2002 |
| 6112675 | Process and apparatus for treating process streams from a system for separating constituents from contaminated material A process and apparatus for recovering and treating hazardous and non-hazardous components from process streams generated from a continuous system for selectively separating organic and inorganic constituents from contaminated material. The contaminated m... | 09/05/2000 |
| 6000882 | Methods and systems for remediating contaminated soil A system and method for remediation of contaminated soil removed from a soil site is provided. The contaminated soil is placed upon several layers of perforated heating pipes forming a remediation cell, and the entire cell is covered by a galvanized Quons... | 12/14/1999 |
| 5988947 | Multi-section soil remediation device The present invention relates generally to a soil remediation device, and more particularly to a multi-section soil remediation device having at least one section for applying a variety of soil treatment regimes. The multi-section device can be independen... | 11/23/1999 |
| 5814234 | Integrated soil and fluid decontamination system A method for decontaminating both soil and mixed waste water polluted by hydrocarbons in a single integrated process is disclosed. Contaminated mixed waste fluid is separated into water and hydrocarbons which are then used in the thermal decontamination o... | 09/29/1998 |
| 5766303 | Process for the remediation of lead-contaminated soil and waste battery casings Lead-contaminated soil and battery casings are remediated using a plasma arc furnace which pyrolyzes the soil and waste battery casings so as to form a vitrified slag and a combustible gas, respectively. The combustible gas along with volatilized lead (an... | 06/16/1998 |
| 5658094 | Energy recuperative soil remediation system An improved system for remediating soil contaminated with short-chain hydrocarbons, long-chain hydrocarbons and PCB's. The system includes an rotary drum having first and second heat exchanging regions, each containing separated inner and outer regions. T... | 08/19/1997 |
| 5625119 | Method for treating sludge and soil contaminated with hydrocarbons A method for treating an emulsion of hydrocarbons and solids such as sludge includes spraying the sludge into a preheater and pneumatically conveying it by primary air into an oxidation chamber. Secondary air is directed into the oxidation chamber through... | 04/29/1997 |
| 5613452 | Method and apparatus for soil remediation with superheated steam thermal desorption and recycle A method and apparatus are provided for remediating contaminated soil having volatilizable organic pollutants in a heated treatment zone, preferably a rotary drum, in gas/solids contact with superheated steam. Treatment gases from the treatment zone are r... | 03/25/1997 |
| 5569154 | Method and apparatus for removing mercury from mercury-contaminated soils A method for the removal of mercury from soil, wherein the soil has been contaminated with mercury. The method comprises the following steps. Soil is added to one end of an internally fired hollow screw desorber under a vacuum in the range of from about 1... | 10/29/1996 |
| 5540846 | Process for filtering solid-liquid mixtures within an enclosed pressure space The invention relates to a process for the separation, in particular filtration of liquids and solids from solid-liquid mixtures, such as from a mineral, ore, coal or sludge suspensions of contaminated earth. The processing space of the filtration apparat... | 07/30/1996 |
| 5534158 | Method for clean-up of soils or refuse materials contaminated with highly viscous coal or petroleum derived tars/oils A process is provided for clean-up of soils contaminated with highly viscous coal tar and/or petroleum derived organics. This new invention is based on application of the modified Clean Soil Process integrated with modified thermal desorption technology. ... | 07/09/1996 |
| 5466418 | System for the remediation of highly contaminated soils A low-temperature thermal desorption (LTTD) system remediates highly contaminated soils. The system (1) reduces the concentration of vaporized contaminants exhausted from the primary treatment unit (PTU) and (2) precisely controls the concentration of vap... | 11/14/1995 |
| 5391018 | Process for washing contaminated soil A process and apparatus is presented for removing contaminants from particulate materials especially earth materials by converting said materials by mixture with water and additives to slurries which are energized to volume boiling conditions thereby disl... | 02/21/1995 |
| 5350252 | Single drum multiple soil remediation and classification apparatus and method A single drum of a flow-through soil remediation plant includes a first zone which is a heating zone. The heating zone is disposed next to an intake end through which a first soil material to be contaminated is introduced into the remediation plant. Heat ... | 09/27/1994 |
| 5345033 | Method for the neutralization of hazardous materials A method for neutralizing hazardous materials wherein the material and if applicable, the device within which such material is contained, is first cooled to substantially sub-ambient temperatures. The material is then safely extractable from such device a... | 09/06/1994 |
| 5342482 | Leachate evaporation system In the representative leachate treatment system disclosed in the specification, leachate is supplied to a submerged combustion gas evaporator having a downwardly-directed central burner supplying combustion gases through a downcomer to a combustion gas di... | 08/30/1994 |
| 5300137 | Method for removing mercury from contaminated soils and industrial wastes and related apparatus A method and an apparatus for removing mercury from contaminated soils and industrial wastes are provided. The removed mercury may be recovered. A furnace vaporizes the mercury containing portion and the vapors are condensed. In one embodiment, an individ... | 04/05/1994 |
| 5282695 | Apparatus and method for thermally stripping volatile organic compounds from soil using a recirculating combustible gas A transportable thermal stripping system for removing volatile organic compounds (VOC) from soil is provided. The system includes a vessel in which contaminated soil is placed into contact with a hot gas. The gas is discharged from the vessel and ambient ... | 02/01/1994 |
| 5256208 | Process for removing volatile contaminants from granular materials Volatile organic compounds and other volatile contaminants are removed from soils and granular solids by contacting the soil with steam at superatmospheric pressure and thereafter rapidly reducing the pressure by flashing off steam and vaporized contamina... | 10/26/1993 |
| 5242246 | Surface remediator A soil surface remediation apparatus useful for decontamination of oil or chemical spill sites and toxic waste containing sites comprises a soil treatment apparatus mounted on a mobile trenching machine tractor which excavates trenches in a contaminated s... | 09/07/1993 |
| 5228803 | Apparatus and method for thermally stripping volatile organic compounds from soil using a recirculating combustible gas A transportable thermal stripping system for removing volatile organic compounds (VOC) from soil is provided. The system includes a vessel in which contaminated soil is placed into contact with a hot gas. The gas is discharged from the vessel and ambient ... | 07/20/1993 |
| 5228804 | Method and apparatus for hydrocarbon-contaminated soil remediation A method and apparatus for ex situ remediation of hydrocarbon-contaminated soil, comprising the excavation of the soil from its in situ position and forming a covered pile of loosened soil, at the base of which an array of a plurality of hot air inlet con... | 07/20/1993 |
| 5205674 | Soil decontamination method A soil decontamination method in which soil and rocks contaminated with hydrocarbons, but substantially free of hazardous materials, is processed at a stationary site. The soil is first stored in a lined storage pit, segregated by type and source. Rock an... | 04/27/1993 |
