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| Number | Title | Issue Date |
| 8021556 | Method of clarifying industrial wastewater for the reduction of organic waste content using cationic dispersion polymers combined with powdered activated carbon and anionic flocculent polymers A method is provided for clarifying wastewater containing contaminants including soluble organic compounds and insoluble organic compounds. The wastewater is treated with a paculant admixture including a cationic coagulant polymer and powdered activated carbon. The ... | 09/20/2011 |
| 8017018 | Phosphorus removal method A phosphorus removal system is operable to remove phosphorus from an influent. The system includes a first section receiving the influent and discharging a first flow. A first coagulant inlet is positioned upstream of the first section and is in fluid communication ... | 09/13/2011 |
| 7981297 | Wastewater treatment method comprising decantation and fine screening stages A method for removing helminth egg and other suspended solids from a wastewater stream includes directing the wastewater to a ballasted flocculation system and adding a coagulation agent, flocculation agent and a ballast into the wastewater. Sludge is settled from t... | 07/19/2011 |
| 7967988 | Method for treatment of waste latex A method and a apparatus for treating a liquid volume containing latex waste, the method comprising providing a treatment apparatus comprising at least a first vessel, and a filtration system in liquid communication with the first vessel; delivering a portion of the... | 06/28/2011 |
| 7727404 | Method for removal of materials from a liquid stream A method for removal of dissolved materials and/or particles from a liquid stream comprising flocculation by vigorously mixing polysaccharides or hydrocolloids into the liquid stream and subsequent gelation of the polysaccharides or hydrocolloids with cations capabl... | 06/01/2010 |
| 7713422 | Black liquor treatment method Lignin and alkali are efficiently sorted out of alkaline black liquor discharged from the paper manufacturing/pulp and paper manufacturing industries and the treated water is made as purified water. Acid is added to the black liquor and its pH is adjusted to ... | 05/11/2010 |
| 7704399 | Hydrogen peroxide based water treatment method A system and method for the treatment of water for human consumption using a naturally occurring inorganic catalyst working within a pH range between 3 and 13, combining the inorganic catalyst at 3 parts per million to an oxidant, primarily hydrogen peroxide and a m... | 04/27/2010 |
| 7686960 | Multistage process for treating water utilizing in one stage magnetic seed to sorb dissolved contaminants, and in another stage utilizing magnetic seed to clarify the water A multi-stage process for removing dissolved contaminants and suspended solids from water employing a magnetic separation technique. The process includes two tanks and magnetic seed. In the first tank, water is clarified by magnetic technologies and in the second ta... | 03/30/2010 |
| 7674384 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2 | 03/09/2010 |
| 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 |
| 7332002 | Low sulfur coal additive for improved furnace operation The present invention is directed to additives for coal-fired furnaces, particularly furnaces using a layer of slag to capture coal particles for combustion. The additive(s) include iron, mineralizer(s), handling aid(s), flow aid(s), and/or abrasive material(s). The... | 02/19/2008 |
| 7332054 | Etch apparatus In a process using a hot phosphoric acid etchant (12) to etch silicon nitride on a semiconductor wafer (15) submerged in a tank (11) of the etchant (12), a recirculating path is established for the etchant (12). A porous filter ( | 02/19/2008 |
| 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 |
| 7320757 | Body fluid processor enabling direct hemoperfusion A safe and practically useful body fluid processor whereby blood taken out from a patient can be directly processed, characterized by having a favorable passage of the blood cell and showing an extremely low risk of the generation and leakage of microparticles. Name... | 01/22/2008 |
| 7311841 | Method for treating water by ballasted flocculation and decantation The invention concerns a water treatment method which consists in introducing coagulated water in a flocculation zone, to enable flocculation of microflocs in the presence and around a ballast; introducing the mixture in a decantation zone; separating the treated wa... | 12/25/2007 |
| 7300585 | Method of treatment of effluent stream A method for treating an effluent stream containing material which it is desired to remove from the effluent stream comprises treating the effluent stream with a solution of an acid and a first polymer to reduce the pH of the thus-treated stream to a range of about ... | 11/27/2007 |
| 7282152 | Selenium removal method The present invention provides a method for removing selenium from an aqueous stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter and recovering a treated aqueous stream which is depleted in selenium content relati... | 10/16/2007 |
| 7264729 | Process for reducing contaminants in condensate resulting from the conversion of bauxite to alumina This invention relates to a process for reducing the contaminants in condensate resulting from the conversion of bauxite to alumina. ... | 09/04/2007 |
| 7255796 | Method of preventing hydrogen sulfide odor generation in an aqueous medium The present invention relates to a fast acting chemical treatment for preventing the generation of hydrogen sulfide odor by the microbial metabolic activities of sulfate reducing bacteria. Specifically, the invention relates to a method for preventing hydrogen sulfi... | 08/14/2007 |
| 7244362 | Water treatment by ballasted flocs and degreasing The invention concerns the use of a coagulation-flocculation-decantation device for water treatment to degrease water inside the device itself so as to eliminate therefrom more than 20% of hexane-extractable matter without resorting to separate degreasing means by f... | 07/17/2007 |
| 7205153 | Analytical reagent for acid copper sulfate solutions Embodiments of the invention provide an analytical method and analytical reagent solutions for determining the concentration of electrolyte components, such as copper, acid and chloride constituents in an acid or basic metal plating bath using a chemical analyzer. C... | 04/17/2007 |
| 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 |
| 7172703 | Method of reclaiming a well completion brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and/or non-zinc heavy metals; and (ii) calcium and zinc. The chelant is of the formula: ... | 02/06/2007 |
| 7169261 | Silica-based sols An aqueous sol containing silica-based particles which has an S-value within the range of from 10 to 45%, a viscosity within the range of from 5 to 40 cP, and a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range o... | 01/30/2007 |
| 7160470 | Method of clarifying industrial laundry wastewater using cationic dispersion polymers and anionic flocculent polymers Methods are described for removing contaminates from aqueous industrial wastewater process streams, specifically industrial laundries to yield a less contaminated aqueous effluent for discharge to a sewer and reduce the sludge generated therefrom. A premixed medium/... | 01/09/2007 |
| 7144512 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2 | 12/05/2006 |
| 7097768 | Coconut mesocarp-based biofilter material and its use in a wastewater treatment system A biofilter material for biofiltering a fluid is disclosed. This biofilter material comprises fragments of coconut mesocarp. A wastewater treatment system is also disclosed and comprises a filter bed and a water distribution system. The filter bed comprises fragment... | 08/29/2006 |
| 7083731 | Precious metal scavenging from a liquid medium with a functionalised polymer fiber A method for the recovery of a metal from a liquid medium containing the metal I solution or in finely divided insoluble from comprises contacting the medium with a functionalized polymer fiber capable of binding the metal and recovering the metal from the fiber. Th... | 08/01/2006 |
| 7083715 | Method and plant for thickening sludge derived from water treatment by flocculation-decantation with ballasted floc A method is provided for thickening sludge produced through a ballasted flocculation process. The sludge and granular material from the ballasted flocculation process are directed to a sludge separator where the sludge is separated from the granular material. Therea... | 08/01/2006 |
| 7048781 | Chemically-impregnated silicate agents for mercury control The present invention is directed to a contaminant removal agent comprising a polyvalent metal sulfide 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 sil... | 05/23/2006 |
| 7048859 | Method for treatment of aqueous streams comprising biosolids A process is provided which can be used to clarify substantially aqueous streams and optionally separate biosolids, especially proteins, from food processing operations which comprises contacting an aqueous stream comprising biosolids with an anionic inorganic collo... | 05/23/2006 |
| 7029202 | 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 ... | 04/18/2006 |
| 7030205 | Polydithiocarbamate resin The present invention is directed to a solid chelating resin consisting of a reactive hydrophobic backbone having pendent carbodithioic groups. Preferably the resin is a poly(dithiocarbamate) containing no tertiary nitrogen groups. The invention is also directed to ... | 04/18/2006 |
| 7008912 | Pressed piece which disintegrates in liquids The invention relates to a pressed piece consisting of ingredients in powder and/or granular form, which contains particles made of a material containing cellulose, particularly in compacted form, which act as an explosive agent. TMP and CTMP can be used as the cell... | 03/07/2006 |
| 6977048 | Method of recycling water contaminated oil based drilling fluid A method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oil component and an aqueous component. The method includes: mixing the invert emulsion drilling fluid with a emulsion clearing agent, where... | 12/20/2005 |
| 6960303 | Alum pellets Compositions including pellets of alum, a smectite mineral material and optionally sodium or calcium carbonate that can be delivered to a phosphate impoundment located at the bottom of a body of water at the bottom. The pellets of alum, smectite mineral material and... | 11/01/2005 |
| 6946076 | Removal of phosphate from water Methods and compositions for removing phosphate from swimming pool waters are disclosed. The compositions include both soluble and substantially insoluble lanthanide carboxylates, preferred examples being lanthanum glycolate and lactate. The methods include the addi... | 09/20/2005 |
| 6942840 | Method for removal and stabilization of mercury in mercury-containing gas streams The present invention is directed to a process and apparatus for removing and stabilizing mercury from mercury-containing gas streams. A gas stream containing vapor phase elemental and/or speciated mercury is contacted with reagent, such as an oxygen-containing oxid... | 09/13/2005 |
| 6916431 | Precipitating chemical The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mine... | 07/12/2005 |
| 6916426 | Method of waste treatment A method of treating an animal waste slurry so as to efficiently extract nutrients, and which can be performed in a zero-discharge system, comprises flocculating the slurry, processing, e.g. filtering, the flocculated slurry to separate liquid from solid material, d... | 07/12/2005 |
