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| Number | Title | Issue Date |
| 8273249 | Method integrating electrochemical oxidation and flocculation processes for pre-treatment of coking wastewater A new method that integrates electrochemical oxidation and flocculation processes for removing ammonia nitrogen in coking wastewater is disclosed in this invention. It comprises steps as follow: first, adjusting the PH of coking wastewater and adding Fe2+... | 09/25/2012 |
| 8101088 | Method for depolluting aqueous media containing organic pollutants The present invention relates to a process for decontaminating aqueous media comprising organic contaminants. The process is targeted at reducing the COD and/or the TOC of an aqueous medium comprising organic molecules. It consists in subjecting the aqueous m... | 01/24/2012 |
| 8097167 | Concentration of suspensions The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are all... | 01/17/2012 |
| 7790042 | Method for the removal of submicron particulates from chlorinated water by sequentially adding a cationic polymer followed by adding an anionic polymer A method for removing submicron colloidal particulates, such as hydrocarbons, from water. The method includes first adding a soluble, cationic polymer, such as chitosan, a salt, or solution of chitosan to water containing the submicron particulates and a halogenatin... | 09/07/2010 |
| 7736519 | Method for processing aqueous effluents containing metal nitrate or nitrite salts The invention relates to a method for processing an aqueous effluent (E) containing in solution at least one type of metal (M) nitrite or nitrate whose oxide is stable in an aqueous medium consisting (I) in introducing cations NH4+ in aqueous solution, ge... | 06/15/2010 |
| 7638063 | Methods for replenishing a charge of oxidizing gas within an oxidation tank Contaminants are removed from fluid in a system where the fluid is sprayed into an air head at the top of a tank through a diffuser and withdrawn through a pick-up tube. A solenoid valve operates to allow oxygen-containing gas from a compressed gas source to flow in... | 12/29/2009 |
| 7497956 | Method for stabilizing and conditioning urban and industrial wastewater sludge The invention concerns a method for stabilizing and conditioning wastewater sludge. The invention is characterized in that it consists in treating sludge in an acid environment (3.0≦pH≦5.0), with an inorganic acid and two oxidizing agents, that is a ferric iron ... | 03/03/2009 |
| 7442311 | Emulsion and effluent treatment processes An emulsion and affluent process which treats and breaks very tight emulsions and separates dissolved solids from associated fluids produced in industry, whereby solids and fluids are separated into clean interfacial phases thus providing an improved quality saleabl... | 10/28/2008 |
| 7413664 | Selenium removal process A process for removing selenium from an aqueous stream using a supported sulfur material, to convert selenocyanate to selenite, followed by removal of the selenite from the aqueous stream. ... | 08/19/2008 |
| 7404902 | Method for treating water A composition for treating water contained in enclosures, such as swimming pools, spas, whirlpool tubs and cooling towers, which includes at least one boron compound, cyanuric acid, at least one mineral remover and at least one clarifier is provided. A composition a... | 07/29/2008 |
| 7384562 | Treatment of brown grease The invention is a process for treatment of brown grease, where the brown grease comprises water, food solids and free-oil. This process starts with the collection of the brown grease into a container. The brown grease's pH is adjusted with a chemical treatment to p... | 06/10/2008 |
| 7374694 | Method for remineralizing raw water The invention relates to a method and installation for treating water for human consumption, for an industrial process, for agricultural purposes or for other purposes. The method used to remineralize raw water comprises a stage in which carbon dioxide and at least ... | 05/20/2008 |
| 7374687 | Method of decolorizing stock-raising treatment water A decolorization treatment method in which not only can a liquid that has been obtained by treating raw water that is stock-raising treatment water in a purifier tank be decolorized swiftly with simple equipment, but moreover the treatment water can be purified to a... | 05/20/2008 |
| 7361283 | Extraction and treatment of heavy metals Contaminated waste streams or soil or sludge is subjected to a first treatment stage with an acid liquor at a pH below 2 and at a solids content from 5 to 30%; then the liquid and solid phases from the first treatment stage are separated; the solids from the first t... | 04/22/2008 |
| 7354733 | Method for sorting and separating living cells We disclose methods of sorting or separating mixtures of living cells (e.g., eukaryotic, prokaryotic, mammalian, pathogenic, bacterial, viral, etc.). We perform our methods by activating cell-selective photophoric labels, which photosensitize and chemically reduce a... | 04/08/2008 |
| 7338603 | Process using rare earths to remove oxyanions from aqueous streams Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or su... | 03/04/2008 |
| 7335309 | Method for removing metal compounds from waste water A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferable 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to... | 02/26/2008 |
| 7335308 | Method for treatment of liquids, in particular, for purification of contaminated water The invention relates to a method and an installation for treating liquids, especially for purifying contaminated water. Said method consists of the following steps: the raw water is pre-purified by adding a foam-forming reaction agent; the pre-purified water underg... | 02/26/2008 |
| 7332095 | Wet oxidation An oxidation process is described which involves subjecting a feedstock which contains oxidizable material to temperature, pressure and contact with an oxidant. Excess water and volatile oxidation products, such as carbon dioxide, formic acid and acetic acid, are re... | 02/19/2008 |
| 7329356 | Flocculating agent for clarifying the water of man-made static water bodies A method is described for clarifying man-made static water bodies in which polyaluminum silicate sulfate is added to the water of the water body. Superior flocculation is achieved through the use of polyaluminum silicate sulfate which results in cleaner and more aes... | 02/12/2008 |
| 7326346 | High capacity regenerable sorbent for removal of arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/05/2008 |
| 7320759 | Sludge treatment method A sludge treatment method allowing an improvement in a phosphorus recovery rate and sludge volume reduction by efficiently eluting phosphorus in the sludge. The sludge treatment method includes: a step of foaming a sludge-containing liquid by blowing an ozone-contai... | 01/22/2008 |
| 7311786 | Passivation of sulfidic iron-containing rock A method for passivating sulfidic iron-containing rock comprising: contacting sulfidic iron-containing rock with a magnesium-containing substance, a manganese-containing substance, and a calcium-containing substance; and adjusting the pH of the system to below about... | 12/25/2007 |
| 7300589 | Process for removing arsenic from aqueous streams Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 11/27/2007 |
| 7294268 | Metal containing waste water treatment method and metal containing waste water treatment equipment This metal containing waste water treatment method introduces a metal containing waste water from above into a submerged membrane separation tank 1 in which a reaction section 2, a submerged membrane section 3 having a submerged membrane 5 | 11/13/2007 |
| 7273559 | Process for removal of impurities from an oxidizer purge stream A process is disclosed that relates to the removal of impurities and the recovery of a mother liquor and wash filtrate from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves the rem... | 09/25/2007 |
| 7267778 | Device and process for treating a liquid medium A device for treating liquid medium has an ultrasound emitter located relative to a compartment of a container holding a liquid medium and a microbubble emitter located relative to the compartment. The ultrasound emitter emits high-frequency ultrasound between about... | 09/11/2007 |
| 7264734 | Method for treating dredged material The present invention provides a method for treating dredged material in which liquid is first added to the dredged material, and dewatering the dredged material to obtain a filtrate and a solid portion. Contaminants are removed from the dredged material by at least... | 09/04/2007 |
| 7261822 | Method and apparatus for activating water A process of activating water by leading water to pass through energy concentrated fields which are generated in particles, being composed of a single elementary material selected from a group of silicon, titanium, nickel and samarium or composed of fluorocarbon, of... | 08/28/2007 |
| 7252843 | Composition for cleaning contained bodies of water A composition and method for cleaning, sanitizing and maintaining contained bodies of water such as swimming pools, wading pools, fountains, ornamental ponds, etc. The composition includes pre-determined percentages of copper sulfate, zinc sulfate, and aluminum sulf... | 08/07/2007 |
| 7244363 | Methods for treating heavy halide brines with permanganates The present invention relates to the use of permanganate in the removal of heavy metal contaminants from heavy halide brines. In some embodiments, the present invention discloses methods of treating heavy halide brines that comprise providing a heavy halide brine th... | 07/17/2007 |
| 7238283 | System for wastewater treatment A new and improved wastewater treatment system suitable for the treatment of wastewater from a CMP process. A holding tank receives wastewater from a CMP wastewater collection tank. The holding tank may further receive wastewater from a backside grinding (BG) wastew... | 07/03/2007 |
| 7238287 | Method for providing safe, clean chlorinated recreational water A solid formulation for use with sodium chloride and a chlorine generator to provide safe, clean chlorinated recreational water. The formulation comprises a chlorine stabilizing agent and a phosphate remover agent. An enhanced salt comprising a chlorine stabilizing ... | 07/03/2007 |
| 7220360 | Integrated technology in sequential treatment of organics and heavy metal ions wastewater This invention offers an integrated technology in sequential treatment of wastewater. Low biodegradable organics and heavy metal ions are both contained in wastewater from surface finishing processes. The aim of the invention is to find the solution for treatment of... | 05/22/2007 |
| 7211194 | Gravity pressure vessel and related apparatus and methods A gravity pressure vessel (GPV) for processing a fluid stream containing organic materials provides several improvements to the art. In one embodiment, a GPV of the present invention sustains the heat energy requirements of a hydrolysis GPV by including therein, a f... | 05/01/2007 |
| 7204930 | Water purification system and method An oxidation filtration system for cleaning groundwater, the system having an aeration tower and a filtration tank. Within the filtration tank is an upper chamber and a lower chamber. Contained within the lower chamber is a plurality of Styrofoam™ filter media. Se... | 04/17/2007 |
| 7204929 | Method for treating an effluent, especially a radioactive effluent, containing organic matter Method of treating an aqueous effluent containing organic matters in solution, comprising the following successive steps: the effluent is rendered basic; the effluent rendered basic is mineralized by being brought ... | 04/17/2007 |
| 7195782 | Concentrated aqueous bromine solutions and their preparation Described is a process of producing a concentrated liquid biocide formulation. Mixed together are (a) bromine chloride or bromine and (b) an aqueous solution of alkali metal salt of sulfamic acid having a pH of at least about 7, in amounts such that (i) the active b... | 03/27/2007 |
| 7186345 | Systems for water purification through supercritical oxidation Supercritical water (SCW) systems and methods using the properties of supercritical water to allow a raw water stream including water and a contaminant to be purified. A supercritical water oxidation (SCWO), water purifier may generally include water and oxidizer (s... | 03/06/2007 |
| 7183235 | High capacity regenerable sorbent for removing arsenic and other toxic ions from drinking water The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate suc... | 02/27/2007 |
