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5898093 |
Treatment process for contaminated waste
A process for treating contaminated waste to stabilize environmentally harmful heavy metal. The contaminated waste is contacted with a mixture of (i) inorganic sulfide, (ii) calcium phosphate to...
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5877393 |
Treatment process for contaminated waste
A process for treating contaminated waste to stabilize environmentally harmful heavy metals. The waste is contacted with a mixture of a sulfide, preferably calcium sulfide, an inorganic phosphate,...
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5860908 |
Water insoluble heavy metal stabilization process
Ash residues produced from solid waste combustion and certain industrial residues which are sometimes contacted with water for dust control, quenched for temperature reduction or subjected to water...
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5855664 |
Solid waste landfill cover material and method of extending the useful life of a solid waste disposal landfill
A method of manufacturing Construction and Demolition ("C&D") disposal debris into a substitute/alternative daily/initial cover product approved by an environmental regulatory authority for use at...
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5829691 |
Method and apparatus for washing soil
A soil washing apparatus utilizing a water-based surfactant to separate contaminants from soil particles with particle sizes within a predetermined range. After removing the...
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5788623 |
Method for treatment of solid waste to minimize permeability of the waste
This invention relates to the treatment of contaminated materials including soils and solids to reduce its permeability, and in particular to chemical treatment of waste or solids containing high...
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5776350 |
Separation of raw agricultural waste
A method for separating raw agricultural waste into a liquid portion and a nutrient enriched solids portion is disclosed. This method includes providing raw agricultural waste to be treated, adding...
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5732367 |
Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials
A process for chemical fixation of radionuclides and radioactive compounds present in soils and solid materials. Radionuclides and other radioactive compounds are converted to low-temperature...
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5649894 |
Compositions and methods for waste treatment
Methods for waste treatment and compositions of stabilized waste elements are provided, typically for the disposal of arsenical wastes. Arsenic trioxide waste produced as a by-product of metal...
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5636942 |
Mineral processing tailings disposal
A process is disclosed for disposing mineral processing tailings. The process includes the step of treating the tailings to produce a flowable paste including a mass comprised of particles at least...
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5630785 |
Process for the treatment of waste products
In this process for the treatment of waste products, the waste products are separated in a first and a second group with respective pH-value of maximum 7 or higher than 7. The waste products of the...
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5591117 |
Method and an apparatus for the disposal of material containing infective microorganisms
The disposal of material containing infective microorganisms such as bacteria, fungi and viruses and more especially for the disposal of waste from medical facilities such as clinics and medical...
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5574204 |
Method for the mutual chemical and compaction treatment of inorganic wastes
Water-containing inorganic waste materials, originally in loose form, and which contain water-soluble components capable of reacting with each other are mixed and then compacted at a pressure...
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5569155 |
Fixation and stabilization of metals in contaminated materials
The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert...
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5562585 |
Process for disposal of asbestos or substances containing it
In a process for disposal of asbestos or substances containing it, the initial material is converted by very fine grinding together with at least one material OH - -ions in water in aqueous...
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5550314 |
Method of environmentally stabilizing lead paint contaminated debris
A method of immobilizing or stabilizing lead paint contaminated construction or demolition debris in which the debris is shredded, mixed with water and a chemical, such as fly ash, lime, Portland...
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5525139 |
Process for bioremediation of soils
The present invention is an improved bioremediation process comprising the steps of: (a) inoculating cotton gin trash or an equivalent plant material with soil from a contaminated site; (b)...
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5502267 |
Organic and metallic waste disposal in bentonite-water mixtures
Organic waste such as hydrocarbon waste, refinery sludges, tank bottom sludges, certain wastes from paint, solvent and wax manufacturing and active metals and active metal oxide compositions are...
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5490741 |
Metered blending equipment for soils, sludges and liquid/solid mixtures
Apparatus for metered blending of contaminated soil or sludge materials with dry powder and liquid chemicals to stabilize the contaminated materials. A vibratory screen separates the material to a...
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5486068 |
Process for treating waste materials with concentrated acid and the product produced thereby
A process for treating wood, particularly wood wastes (such as sawdust and the like), and/or paper, particularly waste paper (such as newsprint), and/or other types of polysaccharides (matter...
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5454666 |
Method for disposing of unwanted gaseous fluid components within a solid carbonaceous subterranean formation
A method for disposing of unwanted gaseous fluid components, such as carbon dioxide, oxides of nitrogen, hydrogen sulfide, and oxides of sulfur within a solid carbonaceous subterranean formation,...
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5431825 |
Method for the reduction and stabilization of metals
A method for reducing reducible metals comprising combining one or more reducible metals with an elemental metal, and then with a reducing agent to form a reduced metal. The mixture may then be...
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5429750 |
Method of treating wastewater sludges for pathogen removal and vector control
A method to remove pathogens from dewatered sludge and to reduce vector attraction that includes the steps of raising the pH 12 of the sludge above 12, subjecting the sludge to low ambient (near...
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5417864 |
Decontamination of hydrocarbon containing substrates (LAW100)
Simply stated, in the process of the present invention a hydrocarbon contaminated substrate, such as a hydrocarbon contaminated soil, is separated preferably by wet-sieving, into a coarse fraction...
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5401119 |
Process and apparatus for the disposal of waste materials
An apparatus and method for the disposal of biodegradable solid waste material such as as cellulosic material and paper. The apparatus includes a trench cutter for both cutting a trench in the soil...
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5397478 |
Fixation and stabilization of chromium in contaminated materials
A highly flexible multi-step treatment technology for chemical fixation and stabilization of leachable chromium, particularly hexavalent chrome, in contaminated soils, solid wastes, concrete,...
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5387739 |
Treatment of municipal waste ash
Ash obtained from incineration of municipal waste is mixed with small quantities of water, from 10-35% by weight of the ash, and the product so formed is compacted and extruded. Where required,...
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5366637 |
Method for dewatering municipal solid waste refuse
A method for dewatering the refuse ash generated by a municipal solid waste facility by adding to the ash a copolymer and a nonionic surfactant selected from the group consisting of primary alcohol...
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5347071 |
Process for the removal of heavy metals from contaminants
A process for the treatment of contaminants using metal scavenger is disclosed. The metal scavengers individually comprise a polyamine derivative and a polyethyleneimine derivative. The polyamine...
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5318383 |
Closed-loop automated waste processing system and method
A method for controlling a closed-loop processing system (100) including the steps of receiving and analyzing an element to be processed to identify the contents thereof. The method further...
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5275509 |
Method of disposing of photographic fixer and developer
A method of disposing of photographic fixer and developer. The fixer and developer, preferably in equal quantities, are mixed and the mixture combined with an absorbing polymer which is...
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5269634 |
Apparatus and method for sequential batch anaerobic composting of high-solids organic feedstocks
Apparatus and method for performing sequential batch anaerobic composting on high solids content wastes are provided, wherein a plurality of longitudinally extending trenches in the ground are...
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5252003 |
Attenuation of arsenic leaching from particulate material
The specification discloses a method for the treatment of particulate materials such as soils and sludges containing arsenic compounds which comprises contacting the material with a source of iron...
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5246682 |
Process for waste liquid-free processing of chlorosilane distillation residues with hydrochloric acid
A process for waste liquid-free processing of residues of chlorosilane distillations, wherein the residue is allowed to react with liquid hydrochloric acid accompanied by the release of hydrogen...
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5242603 |
Process for the disposal of waste
A process for treating waste by mixing the waste with a chemical reagent and a pozzolanic material. The chemical reagent includes a retarder that is a viscosity-altering reagent, and an accelerator.
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5207532 |
Process for conditioning material for disposal
Petroleum production, refining, and mining disposable deposits and sediments are treated with an oxidizing agent such as chlorine dioxide and/or particle separation to reduce the mass of disposable...
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5202033 |
In situ method for decreasing heavy metal leaching from soil or waste
A method of treating solid waste in soil or solid disposed waste containing unacceptable levels of leachable metals, such as lead, cadmium, arsenic, zinc, copper and chromium, includes mixing the...
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5198122 |
Method of detoxification of substances by utilization of ultrasonic energy
An improved method for detoxification of contaminated liquids or solid materials by the application of ultrasonic energy to the material in the presence of agents capable of initiating chemical...
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5143481 |
Method of treating municipal sewage sludge and product produced thereby
The invention relates to a method of utilizing sewage sludge to form a stablized sterile or pasteurized material which can be used as fertilizer, as fill for land development, or as a cover in...
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5135734 |
Process for removing a residue containing sodium sulphate
Process for removing an industrial residue containing sodium sulphate, in which the sodium sulphate in the residue 7 is treated with a calcium salt 12 to precipitate calcium sulphate 13, which is...
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5114275 |
Process and waste pit liner for improved hydrophobic waste storage
A process for improved hydrophobic waste storage is described wherein a latex comprising a preformed, high molecular weight polymer having a high affinity for hydrophobic liquids, is sprayed on the...
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RE33915 |
Disposable hazardous and radioactive liquid hydrocarbon waste composition and method
An improved method of disposing of radioactive or hazardous liquid hydrocarbon compositions comprises placing the liquid hydrocarbons in a container and adding an organic ammonium montmorillonite...
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5108498 |
Method of cleaning debris
A method of cleaning debris, which involves the separation of heavy metals and oils, simultaneously, from the debris, which debris is primarily an inert substance, such as soil from a coking plant....
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5037479 |
Method for reduction of heavy metal leaching from hazardous waste under acidic and nonacidic conditions
A method of treating solid hazardous wastes containing unacceptable levels of leachable metals such as lead, cadmium and zinc includes mixing the solid waste with a buffering agent selected from...
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5028272 |
Inhibiting leaching of metals from catalysts and sorbents and compositions and methods therefor
During use in hydrocarbon conversion processes, sorbents, e.g. for carbon and metals, and catalysts become contaminated with metals, e.g. heavy metals such as vanadium, nickel and sodium. Leaching...
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4990031 |
Treatment of mine tailings
Mine tailings containing iron sulphides can cause acidity in groundwater travelling down through the tailings, if the tailings ever become exposed to the air. In the worst case, if only an upper...
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4975115 |
Process for treating dust and fume produced by the basic oxygen steelmaking process
A process for conditioning basic oxygen steelmaking process dust and fume containing heavy metals for disposal. A sufficient quantity of solidified basic oxygen steelmaking process slag particles...
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4950409 |
Method for treating hazardous wastes
A method of treating solid hazardous waste containing unacceptable levels of leachable metals such as lead and cadmium includes mixing the solid waste with lime and an agent selected from the group...
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4948516 |
Method of disposing of wastes containing heavy metal compounds
A method of disposing of wastes containing heavy metal compounds by neutralizing the wastes, oxidizing the neutralized wastes, then solidifying the oxidized wastes using conventional mineral...
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4946311 |
Co-disposal pollution control method-II
Process for disposal of a waste ash by addition thereto of sodium salts, preferably sodium sulfur oxide salt Na 2 SO x where x is 3 and/or 4, in an amount ranging from 5-85 weight percent (dry...
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