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| Number | Title | Issue Date |
| 7413655 | Method for the biological breakdown of effluent containing nitroaromatics A method for the biodegradation of nitroaromatic-containing wastewater, including: (a) providing activated sludge as biological matrix, (b) adding a nitroaromatic-degrading microorganism to the activated sludge, | 08/19/2008 |
| 7396454 | Method for cleaning tar-bearing waste water and apparatus for performing said method In a method and an apparatus for cleaning tar-bearing waste water (17), a mixture of water and hydrocarbons, e.g. comprising polyaromatic hydrocarbons and phenols, the mixture is separated into a low-boiling-point part and a high-boiling-point part, bringing ... | 07/08/2008 |
| 7393452 | Compositions and methods for the treatment of wastewater and other waste A method for processing environmental samples to remove or otherwise reduce the level of certain chemical species. In a preferred embodiment, the present invention contemplates a process for reducing the level of inorganic and/or organic chemical species in wastewat... | 07/01/2008 |
| 7371324 | Chemical process A process for extracting from aqueous solution the alkali metal or ammonium salt of a phenol, naphthol, anthrol or phenanthrol or the corresponding thiol, which comprises contacting an aqueous alkaline or neutral solution of the alkali metal or ammonium salt, in whi... | 05/13/2008 |
| 7344650 | Process for the working-up of waste waters containing aromatic nitro compounds Alkaline waste waters formed in the washing of crude nitrobenzene which has been prepared by the adiabatic nitration of benzene with nitrating acid, washed in an acidic washing process, and then washed in an alkaline washing process are treated. The alkaline waste w... | 03/18/2008 |
| 7235181 | Metal powder for decomposition of organic halogen and method for manufacturing the same The present invention is to provide metal powder capable of decomposing and remedying various range of organic halogen compounds including organic halogen compounds which are difficult to be decomposed by a conventional decomposition and remediation method. Metal po... | 06/26/2007 |
| 7144509 | Process and apparatus for waste water treatment Method and apparatus for treating contaminants in water under anaerobic conditions is disclosed. The method includes adding to contaminated water a composition including an aqueous mixture of at least one carbohydrate and at least one alcohol and/or bacteriastat. Th... | 12/05/2006 |
| 7138059 | Environmental bioremediation using shell as an electron donor A method for in situ bioremediation of contaminants in the environment is described. The method includes adding an electron donor to ground water in an amount sufficient for a microbe in the ground water to use the electron donor for reducing the contaminant into an... | 11/21/2006 |
| 7115203 | Remediation with ozone of sediments containing organic contaminants A system for treating sediments contaminated with organic contaminants, such as polychlorinated biphenyls (PCBs) and other contaminants polyaromatic hydrocarbons (PAHs) and dichlorodiphenyltrichloroethane (DDT) includes treating the sediments with ozone to react the... | 10/03/2006 |
| 7022241 | Gas-gas-water treatment system for groundwater and soil remediation A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in injection wells of microfine bubble generators, matched to substrates of... | 04/04/2006 |
| 7011749 | Remediation with ozone of sediments containing organic contaminants A system for treating sediments contaminated with organic contaminants, such as polychlorinated biphenyls (PCBs) and other contaminants polyaromatic hydrocarbons (PAHs) and dichlorodiphenyltrichloroethane (DDT) includes treating the sediments with ozone to react the... | 03/14/2006 |
| 6984329 | Coated microbubbles for treating an aquifer or soil formations A microporous diffuser includes a first elongated member including at least one sidewall having a plurality of microscopic openings. The sidewall defines an interior hollow portion of the member. The diffuser has a second elongated member having a second sidewall ha... | 01/10/2006 |
| 6936170 | Methods and apparatus for biological treatment of aqueous waste A biofilter system of the present invention utilizes an Alternating-Aerobic-Anoxic (AAA) process in a single reactor to provide efficient and cheap removal of carbonaceous materials, nitrogenous materials, and/or mixtures thereof from aqueous waste. The biofilter sy... | 08/30/2005 |
| 6908559 | Process for treating a solid-liquid mixture A process for treating a solid-liquid mixture by cavitation to decompose at least some contaminant associated with the solid particles, the contaminant either being absorbed into the pores of the solid or onto the surface of the solid particles. The process includes... | 06/21/2005 |
| 6827861 | Gas-gas-water treatment system for groundwater and soil remediation A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in injection wells of microfine bubble generators, matched to substrates of... | 12/07/2004 |
| 6815050 | Porous composite product for the absorption of organic compounds A product for the selective and rapid removal of toxic chlorocarbon compounds from fluid streams is provided in the form of a self supporting porous composite structure containing a multitude of water absorbent particles of cellulosic origin interbonded by hydrophil... | 11/09/2004 |
| 6790358 | Composition for removing trace impurities from inert, non-reactive and reactive liquids Trace impurities such as organic compounds in an inert, non-reactive or reactive liquid such as ammonia, hydrogen chloride, hydrogen bromide, and chlorine are reduced by at least a factor of 5 using liquid purifying systems that contain an ultra-low emission (ULE) c... | 09/14/2004 |
| 6773609 | Advanced water treatment system and advanced water treatment method An improved method for water treatment which comprises subjecting a water to be containing a hazardous material such as a dioxin or PCB to an ozone treatment contacting the water with fine bubbles of ozone having an average diameter of 0.5 to 3 microns; and a combin... | 08/10/2004 |
| 6723249 | Detoxification of onium compounds A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the use of certain additives is described. Suitable additives include, but are not necessarily limited to, carboxylic acids (e.g. naphthenic acids), sulfo... | 04/20/2004 |
| 6719902 | Fe(o)-based bioremediation of aquifers contaminated with mixed wastes Disclosed are methods, devices and apparatus for bioremediation of mixed waste aquifers, based on a synergistic combination of reductive treatment using zero-valent iron and anaerobic biotransformations. Also disclosed are methods for in situ and ex situ remediation... | 04/13/2004 |
| 6632973 | Method for decomposing or oxidizing dioxins and/or poly chlorinated biphenyls contained in liquid An object of the present invention is to provide a simple method which can efficiently convert dioxins and/or PCBs contained in liquid into unharmful substances. Such a method according to the present invention is by introducing a liquid containing dioxin... | 10/14/2003 |
| 6576144 | Method and apparatus for pretreatment of wastewater streams by chemical oxidation Spent caustic and other wastewater streams are pretreated by continuous chemical oxidation. According to one aspect, a wastewater stream is pretreated by continuous chemical oxidation in a plug flow reactor. According to another aspect, a catalyst and an ... | 06/10/2003 |
| 6544426 | Method of quickly decomposing and removing an organic chlorine compound by a hollandite-type photocatalyst A method of quickly decomposing and removing an organic chlorine compound, which comprises coating a liquid containing an organic chlorine compound on the surface of a photocatalyst so that the liquid does not flow, said photocatalyst comprising a holland... | 04/08/2003 |
| 6511604 | Method of treating a liquid material and treatment facilities The present invention relates to the techniques of treating a liquid material to be treated, which enables efficient fractional removal of toxic materials such as PCB in a liquid mixture. The treatment method of the invention comprises the step of permitt... | 01/28/2003 |
| 6502633 | In situ water and soil remediation method and system The remediation treatment creates environmentally neutral species from hydrocarbon contaminants. For soils having a low porosity, fissures are created in the site by, for example, fluid, i.e., hydraulic or pneumatic, fracturing. A catalyst is injected int... | 01/07/2003 |
| 6491822 | Protection of crossflow membranes from organic fouling A method for improving the efficiency and usable life in a cross flow membrane filter used to remove contaminants from bilgewater. The bilgewater is passed upstream of the cross filter membrane through a fluid-pervious filtration media which has been infu... | 12/10/2002 |
| 6475387 | Microbiological method for eliminating a nitroaromatic compound The invention relates to an isolated Penicillium strain capable of eliminating a nitroaromatic compound by mineralization and a microbiological method for eliminating a nitroaromatic compound present in a solution or in a soil.... | 11/05/2002 |
| 6423151 | Removal of toxic contaminants from porous material A method and apparatus for removing a toxic contaminant from porous material by placing the material and a fluid solvent for the toxic in a drum and rotating the drum around its horizontal axis. Also provided is apparatus for placing the drum in a sealabl... | 07/23/2002 |
| 6401731 | Method of decontaminating PCB transformers The decontamination of PCB-containing transformers to obtain treated transformers containing less than 50 parts per million (ppm) polychlorinated biphenyls (PCB) can be achieved using a method wherein the transformer is initially drained of all PCBs; then... | 06/11/2002 |
| 6402966 | Method and apparatus for processing biologically hardly degradable waste water capable of reducing ozone In a method for processing a biologically hardly degradable waste water including benzene ring materials, the waste water is oxidized by using ozone to produce oxalic acid. Then, the oxalic acid is reacted using a chemical reaction to produce oxalate. Fin... | 06/11/2002 |
| 6395188 | Treatment of water containing organic wastes with ammonium nitrate A single step wet oxidation process for treating wastewaters containing organic species, with or without heteroatoms, and anions of strong acids, e.g. sulfate or phosphate ion, or cations of strong bases, e.g., sodium, potassium or calcium ions, and which... | 05/28/2002 |
| 6358419 | Process for the purification of wastewater from the aldolization reaction Wastewater from the aldolization reaction is purified by adjusting its pH to 0 to 6, followed by extraction with monohydric alcohols having at least 8 carbon atoms, hydrocarbons having at least 6 carbon atoms, and mixtures thereof. In some cases, adjustme... | 03/19/2002 |
| 6322701 | Water treatment process A process for the treatment of waste waters containing chemically reducible dissolved organic and inorganic pollutants and suspended mater in particulate or colloidal form. The process comprises of contacting the water with metallic iron or ferrous ions (... | 11/27/2001 |
| 6312605 | Gas-gas-water treatment for groundwater and soil remediation A sparging system and process for in-situ removal of contaminants from soil and an associated subsurface groundwater aquifer of a site is disclosed. The sparge system is capable of extracting contaminant in the form of gas from groundwater in a gas/gas/wa... | 11/06/2001 |
| 6299783 | Process for cleaning up wastewaters from the hock process A process for reducing the loading of wastewaters produced in the preparation of hydroxyl and carbonyl compounds from hydroperoxides by the Hock process, which may be acidic, by treating the wastewaters with an oxygen-containing gas at a pressure greater ... | 10/09/2001 |
| 6287472 | Method for treating contaminated water Groundwater, or other water contaminated with chlorinated organic contaminants, is passed through a permeable body of iron particles. The particles are coated with nickel, but the coating is incomplete, in that, in patches, the iron is directly exposed. T... | 09/11/2001 |
| 6270678 | Method for treating alkaline waste water The present invention relates to a method of treating alkaline waste water originating from washing spent oil which has undergone an alkaline treatment with water and which contains organic material. This method can produce water which can be discharged i... | 08/07/2001 |
| 6264844 | Supercritical water oxidation process and apparatus of organics with inorganics A method and apparatus is disclosed for oxidation of aqueous mixtures of organic material, including toxic material in the presence of inorganic materials, by reaction of said material with water and oxygen at supercritical conditions. Oxygen and the aque... | 07/24/2001 |
| 6258281 | Breaking down aromatic compounds in industrial wastewaters A process for breaking down aromatics in industrial wastewaters that contain small amounts of aromatics by reaction with an ozone-containing oxygen stream at a temperature of from 40 to 70° C. and at a pH of from 4 to 7, involves treating industrial wast... | 07/10/2001 |
| 6254789 | Method for treating aqueous solutions comprising acids and nitrated compounds The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solutio... | 07/03/2001 |
