The present disclosure relates to a method for thermal desorption treatment of organic-contaminated soil. The method includes: subjecting thermal desorption flue gas with a temperature of 120-700 C. and the organic-contaminated soil to a countercurrent contact reaction for 5-30 min to obtain desorption waste gas comprising an organic pollutant and thermally desorbed soil; drying biomass to a water content of 12%, and crushing to a length of 20 cm to obtain a biomass segment; uniformly mixing the thermally desorbed soil with the biomass segment to obtain a mixture A, carrying out low-temperature pyrolytic carbonization of the biomass in the mixture A at a temperature of 250-450 C., heating the soil to obtain remedied soil including organic carbon and pyrolysis gas from the low-temperature pyrolytic carbonization. The disclosure mixes the thermally desorbed soil with the biomass for pyrolytic carbonization, greatly improving the content of an organic matter, recovering a soil function.

The present disclosure relates to a method for thermal desorption treatment of organic-contaminated soil. The method includes: subjecting thermal desorption flue gas with a temperature of 120-700 C. and the organic-contaminated soil to a countercurrent contact reaction for 5-30 min to obtain desorption waste gas comprising an organic pollutant and thermally desorbed soil; drying biomass to a water content of 12%, and crushing to a length of 20 cm to obtain a biomass segment; uniformly mixing the thermally desorbed soil with the biomass segment to obtain a mixture A, carrying out low-temperature pyrolytic carbonization of the biomass in the mixture A at a temperature of 250-450 C., heating the soil to obtain remedied soil including organic carbon and pyrolysis gas from the low-temperature pyrolytic carbonization. The disclosure mixes the thermally desorbed soil with the biomass for pyrolytic carbonization, greatly improving the content of an organic matter, recovering a soil function.

A solids heat exchanger (10) is in the form of a shell and tube arrangement having a shell section (11) through which heated oil (12) passes and a tube section (13). A screw conveyor (14) extends along its length and has a drive motor (15). Drill cuttings or other hydrocarbon contaminated materials are fed in through an inlet (16) and then conveyed along the tube (13) where heat transfer takes place. On exiting the tube (13) oil and water vapour rises and escapes through a first outlet (17) while the now cleaned drill cuttings or other materials fall through a second outlet (18) forming a discharge zone. The apparatus aims to reduce the oil content of the solids to less than 0.5%. The solids can then simply be disposed of. The base oil can be reclaimed and reused.

A solids heat exchanger (10) is in the form of a shell and tube arrangement having a shell section (11) through which heated oil (12) passes and a tube section (13). A screw conveyor (14) extends along its length and has a drive motor (15). Drill cuttings or other hydrocarbon contaminated materials are fed in through an inlet (16) and then conveyed along the tube (13) where heat transfer takes place. On exiting the tube (13) oil and water vapour rises and escapes through a first outlet (17) while the now cleaned drill cuttings or other materials fall through a second outlet (18) forming a discharge zone. The apparatus aims to reduce the oil content of the solids to less than 0.5%. The solids can then simply be disposed of. The base oil can be reclaimed and reused.

Sintered Wave Porous Media Treatment and Apparatus and Process is disclosed, which uses an automated static enclosed arrangement to efficiently remove water, organic contaminants (petroleum, solvents, pcbs, pesticides) and per- and polyfluoroalkyl substances (PFAS) and fluorinated related compounds from large volumes of porous media such as a mixture of soil, gravel, rocks, sediments or other porous media. The Sintered Wave technology is a multipurpose treatment device that uses a Sinter Craft as a treatment vessel that allows earth moving machines to easily enter and exit during loading/unloading. The soil is then conditioned to accommodate treatment by sintering (densifying) by vibrating the soil bed, which removes soil vapor and fluids. The soil bed is then shaped by placing hexagonal holes or slots containing 120 degree angles from top to the bottom of the soil bed. The sintered and shaped soil bed is treated in a sequential manner (small sections at a time) with a narrow band of high velocity hot or cold air, which is conveyed from the top of the bed to the bottom (or the bottom to the top) through the shapes placed in the soil bed; hot or cold air moves through the soil bed in open channels rather than pulled through the porous media itself. Vapor extraction lines situated below (or above) the soil bed extracts vapors from narrow sections in a sequential manner in concert with the narrow band of high velocity hot or cold air. In order to remove high concentration hydrocarbons, small sections of the bed are treated by passing an inert (less than 10% oxygen) narrow band of high velocity hot air (inert wave), followed by a period of no active treatment (soak zone), then followed by an ambient (21% oxygen) narrow band of high velocity hot air (ambient wave). The space between the inert wave and ambient wave takes advantage of the poor thermal conductivity of soils by allowing the soil to remain at temperature without the addition of additional energy (soak zone). The heat sources are flameless electric heaters that produce a maximum temperature of 1,200 F that do not produce oxides of Nitrogen or Oxides of Sulfur. The dense static condition of the soil bed prevents the formation of particulate matter (PM) in emissions. The vapor conveyance and off-gas treatment system are sized to the small active treatment zone rather than the entire soil bed, which saves costs. The Sintered Wave technology uses a self-diagnostic regenerative wave system in high hydrocarbon concentration situations to automatically retreat areas of concern when carbon monoxide, acetone and methylethylketone are detected at certain proportions. The system relies on enhanced capillary flo

Sintered Wave Porous Media Treatment and Apparatus and Process is disclosed, which uses an automated static enclosed arrangement to efficiently remove water, organic contaminants (petroleum, solvents, pcbs, pesticides) and per- and polyfluoroalkyl substances (PFAS) and fluorinated related compounds from large volumes of porous media such as a mixture of soil, gravel, rocks, sediments or other porous media. The Sintered Wave technology is a multipurpose treatment device that uses a Sinter Craft as a treatment vessel that allows earth moving machines to easily enter and exit during loading/unloading. The soil is then conditioned to accommodate treatment by sintering (densifying) by vibrating the soil bed, which removes soil vapor and fluids. The soil bed is then shaped by placing hexagonal holes or slots containing 120 degree angles from top to the bottom of the soil bed. The sintered and shaped soil bed is treated in a sequential manner (small sections at a time) with a narrow band of high velocity hot or cold air, which is conveyed from the top of the bed to the bottom (or the bottom to the top) through the shapes placed in the soil bed; hot or cold air moves through the soil bed in open channels rather than pulled through the porous media itself. Vapor extraction lines situated below (or above) the soil bed extracts vapors from narrow sections in a sequential manner in concert with the narrow band of high velocity hot or cold air. In order to remove high concentration hydrocarbons, small sections of the bed are treated by passing an inert (less than 10% oxygen) narrow band of high velocity hot air (inert wave), followed by a period of no active treatment (soak zone), then followed by an ambient (21% oxygen) narrow band of high velocity hot air (ambient wave). The space between the inert wave and ambient wave takes advantage of the poor thermal conductivity of soils by allowing the soil to remain at temperature without the addition of additional energy (soak zone). The heat sources are flameless electric heaters that produce a maximum temperature of 1,200 F that do not produce oxides of Nitrogen or Oxides of Sulfur. The dense static condition of the soil bed prevents the formation of particulate matter (PM) in emissions. The vapor conveyance and off-gas treatment system are sized to the small active treatment zone rather than the entire soil bed, which saves costs. The Sintered Wave technology uses a self-diagnostic regenerative wave system in high hydrocarbon concentration situations to automatically retreat areas of concern when carbon monoxide, acetone and methylethylketone are detected at certain proportions. The system relies on enhanced capillary flo

Methods of treating matter from a contaminated site in need of decontamination are provided. These methods typically include applying an amendment containing a stimulant to the matter, and actively heating the matter in a controlled manner such that the matter has a temperature above ambient and below 100 C.

Methods of treating matter from a contaminated site in need of decontamination are provided. These methods typically include applying an amendment containing a stimulant to the matter, and actively heating the matter in a controlled manner such that the matter has a temperature above ambient and below 100 C.

Methods are provided for generating or recovering gaseous materials such as hydrogen and solids such as metals through the smoldering combustion of an organic material. The methods include admixing a porous matrix material with an organic material, and, in some embodiments a catalyst, to produce a porous mixture. The mixture is exposed to an oxidant, initiating a self-sustaining smoldering combustion of the mixture, and collecting the vapors and combustion products or processing the porous matrix following combustion to physically separate the porous matrix material from ash containing inorganic materials of value. Additional embodiments aggregate the organic material or catalyst or porous matrix material or mixture thereof in an impoundment such as a reaction vessel, lagoon or matrix pile. Further embodiments utilize at least one heater to initiate combustion and at least one air supply port to supply oxidant to initiate and maintain combustion.

Methods are provided for generating or recovering gaseous materials such as hydrogen and solids such as metals through the smoldering combustion of an organic material. The methods include admixing a porous matrix material with an organic material, and, in some embodiments a catalyst, to produce a porous mixture. The mixture is exposed to an oxidant, initiating a self-sustaining smoldering combustion of the mixture, and collecting the vapors and combustion products or processing the porous matrix following combustion to physically separate the porous matrix material from ash containing inorganic materials of value. Additional embodiments aggregate the organic material or catalyst or porous matrix material or mixture thereof in an impoundment such as a reaction vessel, lagoon or matrix pile. Further embodiments utilize at least one heater to initiate combustion and at least one air supply port to supply oxidant to initiate and maintain combustion.