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| Number | Title | Issue Date |
| 7591946 | Dual zone feedwell for a thickener The invention provides an extraction device (1) for liquid suspensions and pulps and is designed for use in the field of mineral processing. The extraction device includes two adjacent upstream and downstream concentric chambers (2) and (3) defi... | 09/22/2009 |
| 7572368 | Water treatment apparatus 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... | 08/11/2009 |
| 7494586 | Treatment system for liquid concrete washout waste Solid and liquid concrete waste is collected from a construction site and safely off-loaded at a treatment site. Solid waste is separated and sent to a crusher to be made into road bed aggregate. Liquid waste is put in a first tank to settle the solids, then moved t... | 02/24/2009 |
| 7485221 | System for treating wastewater A wastewater treatment system treating excess wastewater from a sewer system includes a generally vertically oriented first shaft structure adapted to receive excess wastewater from the sewer system, a generally vertically oriented second shaft structure spaced apar... | 02/03/2009 |
| 7481918 | Vibratory mixer A treatment system including a vibratory mixer is disclosed. The vibratory mixer comprises a vibrating element to facilitate the dissolution of a treating agent that facilitates separation of solids from liquids in water and wastewater streams. Vibratory mixing ener... | 01/27/2009 |
| 7481922 | Fluid treatment apparatus Fluid treatment apparatus having an alloy disk assembly comprised of a plurality of disks, each prepared from the metal elements copper, zinc, nickel, silver, and tin, which individually exhibit great propensity for reducing scale formation in flow conduits; particu... | 01/27/2009 |
| 7481938 | Metal compound removal The present invention relates to a process for separating at least one metal compound and/or a component thereof from a mixture, said process comprising contacting the said mixture with a heteropoly acid or heteropoly acid anion, thereby producing a precipitate comp... | 01/27/2009 |
| 7473370 | Water disinfection method using simultaneous multiple disinfectants A water disinfection system using simultaneous multiple disinfectants includes a completely stirred tank reactor (CSTR) and a contact basin or clearwell acting as a plug flow reactor (PFR). The CSTR receives ammoniated water and free chlorine, and generates multiple... | 01/06/2009 |
| 7470365 | Sludge concentration system which have functions for automatically charging a coagulant and for automatically controlling the concentration of a sludge The present invention provides a system for sludge treatment which transfers sludge into a dewatering device while maintaining the sludge density at a predetermined level constant suitable for dewatering the sludge even when the density of the precipitated sludge va... | 12/30/2008 |
| 7470363 | Separation device for removing microbubbles Ultrasonic devices for preventing microbubbles and/or microparticles from reaching the brain during a PCI or cardiovascular surgery. Devices 27 and 77 are designed for implantation in the chest cavity and operate in combination with needle vents or oth... | 12/30/2008 |
| 7470370 | Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge st... | 12/30/2008 |
| 7468137 | Wastewater treatment process A wastewater treatment process for treating wastewater comprising a water-based dispersion containing a surfactant, a colorant and silica, as well as other solid matter, wherein the wastewater is treated using a polysilicato-iron coagulant. ... | 12/23/2008 |
| 7465401 | Treatment of chloraminated water A method of treating chloraminated water by adding copper ions is disclosed. The addition of copper ions inhibits microbial action in the water, thus reducing nitrification of ammonia and maintaining chloramine levels. ... | 12/16/2008 |
| 7462296 | Formulation 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 ... | 12/09/2008 |
| 7462279 | Waterways lime spreader Apparatus (10) for treating a waterway having low pH and containing metals such as aluminium in solution, as a result of runoff from acid sulphate soils, is capable of dosing the waterway with a variety of reagents, to bring the metals out of solution and to ... | 12/09/2008 |
| 7455997 | Production of fermentation product A process of producing fermentation product comprising the steps of, (i) forming an acidified suspension of particulate plant derived material comprising a first polysaccharide which is more readily hydrolysable and a second polysaccharide which is more difficult to... | 11/25/2008 |
| 7455859 | Highly concentrated bromine compositions and methods of preparation Liquid and solid bromine-containing compositions are described. A liquid mixed halogen composition is also described. The highly concentrated liquid compositions and the high-activity solid compositions have excellent physical and chemical stability. The composition... | 11/25/2008 |
| 7455783 | Method for centrifugal separation enhancement A method for removing low gravity solids from an oil-based drilling fluid includes directing the drilling fluid into a first inlet of a first line in fluid communication with a centrifuge, injecting steam into the drilling fluid through a second inlet in the first l... | 11/25/2008 |
| 7452463 | Apparatus for treating water Provided are a treatment apparatus for removing fluorine content from water to be treated and a method of treating water to be treated using the same. Water to be treated, containing fluorine, is introduced into a treatment tank over a first path. Slaked lime is add... | 11/18/2008 |
| 7449105 | Water filtration and erosion control system An erosion control system and method wherein a fabric filter bag is embedded with and/or filled with a flocculating polymer and is positioned on a sloping soil surface to dam and pond water flowing thereacross for settling of the particles in the water, and as the p... | 11/11/2008 |
| 7449120 | Process and compositions for the disinfection of waters A process for killing microorganisms and controlling biofouling in high chlorine demand waters comprises mixing two components, one of which is an oxidant and the other an ammonium salt, and adding the mixture immediately to the aqueous system to be treated. ... | 11/11/2008 |
| 7445722 | Thermal water treatment method The invention relates to a device for thermally purifying waste water, comprising a tank through which waste water can flow. The inventive device is characterized by having at least one flow guiding means for guiding the waste water inside the tank in an essentially... | 11/04/2008 |
| 7445718 | Removal of arsenic from drinking and process water A method of removing arsenic and heavy metals from water using metal salt hydroxidegels is provided. The arsenic present in water is adsorbed onto the hydroxide-gels which can effectively be filtered through a diatomaceous earth (DE) filtration bed. The combination ... | 11/04/2008 |
| 7442314 | Wet oxidation method A method for wet oxidation of organic material, characterized by the utilization of the heat generated by the oxidation of the pollutants that are present in a first preheated wastewater introduced at the base of the reactor in order to provide the energy sufficient... | 10/28/2008 |
| 7442755 | Polymers for preventing or reducing aluminosilicate scale in a bayer process Materials and a process are provided whereby polymers with the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in a Bayer process. When materials o... | 10/28/2008 |
| 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 |
| 7438804 | Coagulation treatment apparatus Provided are a coagulation treatment apparatus capable of removing fine objects of removal from a fluid containing the objects of removal, and a coagulation treatment method using the apparatus. A coagulation treatment apparatus for a fluid according to the present ... | 10/21/2008 |
| 7438828 | Water treatment mixture A product and apparatus for cleaning water or industrial and sewage waste water includes a mixture of diatomite that is heated and stirred to impart an enhanced negative electrical charge to the diatomite. A mixture of approximately 50% aluminium chloride (AlCl... | 10/21/2008 |
| 7431846 | Method for concentrating solids from drilling slurry An apparatus to separate solids from drilling slurry, having an inlet positioned over an outlet of a concentration tank to displace water that would otherwise enter the down-stream centrifuges. Baffles are provided to direct solids to the outlet and minimize the tim... | 10/07/2008 |
| 7431845 | Method of clarifying oily waste water A method of clarifying oily waste water comprising adding to the waste water an effective clarifying amount of one or more demulsifiers selected from the group consisting of dendritic polyamines, dendritic polyamidoamines and hyperbranched polyethyleneimines and the... | 10/07/2008 |
| 7429329 | Hybrid chemical/mechanical dewatering method for sewage treatment plants A hybrid chemical/mechanical dewatering sewage treatment plant and method employing rapid sludge chemical dewatering technology in conjunction with slower conventional mechanical dewatering solids agglomeration and disposal methods to meet operating constraints and ... | 09/30/2008 |
| 7425271 | Method for treating sludge Sludge can be treated by placing it in a carrier sized for bulk shipment of sludge by road or by rail. An antipathogenic substance such as lime is mixed into the sludge located in the carrier in order to treat pathogens in the sludge. At least one mixer adapted for ... | 09/16/2008 |
| 7422692 | Raw influent treatment processes eliminating secondary biological treatment Presently no chemicals are added in the pulp/paper mills wastewater treatment. There is a loop hole with the Biological Oxygen Demand test utilized. Regulators depend on the Biological Oxygen Demand test. All mills are discharging raw untreated wastes high in Chemic... | 09/09/2008 |
| 7422121 | Process for producing a sterilization system The invention relates to a method for producing a sterilisation system, especially for sterilising drinking water and water for industrial use. The precious metal surface of a base material containing precious metal is initially oxidised in an acidic solution and su... | 09/09/2008 |
| 7422680 | Animal waste effluent treatment system Animal waste such as fecal material from swine, chicken, turkey, and cattle is converted into useful forms such as fertilizer, other types of soil builders, and even nutrient feed additives. Devices, systems, and methods are provided that allow economical conversion... | 09/09/2008 |
| 7419603 | Water treatment method The present invention provides a physical water treatment (PWT) method and apparatus to treat liquid coolants. Electrodes (22, 24) are provided in a coolant stream (21), and an alternating voltage is applied across the electrodes (22, 24) to pro... | 09/02/2008 |
| 7419605 | Method for treating metal-contaminated water and soil A method for removing metal contaminants from water uses lignin derivatives, such as lignosulfonates and kraft lignin, a coagulant, such as a metal salt, and a pH-increasing composition. The lignin derivative is dispersed in the contaminated water, the coagulant is ... | 09/02/2008 |
| 7419602 | Selenium removal from water A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment to a pH value in the range of from about 6.5 to about 8.0, thereby f... | 09/02/2008 |
| 7419606 | Selenium removal process A process for removing selenium from an aqueous stream using a supported sulfur material, and optionally the addition of an activating agent for enhanced removal of selenite, is disclosed. ... | 09/02/2008 |
| 7419604 | Use of boron compounds to precipitate uranium from water A method is provided for removing uranium from water. The method includes the mixing of a boron reagent with water contaminated with uranyl dication ions, leading to removal of the uranium from that water. ... | 09/02/2008 |