Class / Patent application number | Description | Number of patent applications / Date published |
210721000 | Including oxidation | 43 |
20080264873 | Method and System for Supercritical Water Oxidation of a Stream Containing Oxidizable Material - A method for supercritical water oxidation comprises the steps of: causing a first process stream containing water and organic material to flow in a reaction chamber ( | 10-30-2008 |
20080296231 | Method for the Preparation of Cross-Linked Enzyme Aggregates with Improved Properties - The invention relates to a method for the preparation of cross-linked enzyme aggregates, which method is characterised by the following steps: i. generating aldehyde groups on enzyme molecules that may or may not be dissolved in a suitable solvent; ii. precipitating the enzyme molecules using a suitable precipitation agent; iii. cross-linking the precipitated enzyme molecules provided with aldehyde groups, using an amine composition, yielding cross-linked enzyme aggregates with improved properties. | 12-04-2008 |
20090250404 | DECONTAMINATING FLUIDS AND METHODS OF USE THEREOF - The present invention is directed to materials for the decontamination of fluids and methods of use thereof. The material and methods find applications in the decontamination of intermediates, chemical contaminants, a biological contaminants, wastewater, industrial effluents, municipal or domestic effluents, agrochemicals, herbicides and/or pharmaceuticals. | 10-08-2009 |
20100044317 | WATER PURIFICATION DEVICE FOR ARSENIC REMOVAL - 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 the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state. | 02-25-2010 |
20100102007 | Process for Treatment of Sewage Waste Water - This is a reliable cost-effective adsorption based method for removing the dissolved and suspended organic matter by adding a natural “flocculent sorption particles” which is (Sodium, Calcium, Alumino silicate hydrated), and ferric Chloride, using a mixing tank. Heavy Macro-particles are formed that can be gravity separated and easily dewatered. The supernatant is first treated by OZONE to reduce the remaining organic pollutants and kill the bacteria, then filtered through a single layer of filter media. The suspended solids are mechanically strained down to 3-5 microns. | 04-29-2010 |
20100230363 | Groundwater recharging wastewater disposal method and apparatus - A sulfurous acid treated wastewater disposal method employing soil aquifer treatment (SAT) for artificial recharge of groundwater through infiltration basins allowing fully or partially-treated sewage effluent to infiltrate into the soil and move down to the groundwater through a “vadose” zone, which acts as a natural filter to remove essentially all suspended solids, biodegradable materials, bacteria, viruses, and other microorganisms. | 09-16-2010 |
20110006012 | Method for Decomposing Oil and Other Organic Insoluble and Semi-Soluble Liquids in an Aqueous Medium - A method of decomposing an organic liquid, having a solubility in water of 0 or less than 50 g/l at 25° C., comprising: a) emulsifying an amount of the organic liquid in an amount of an aqueous medium to form an emulsion of the organic liquid in the aqueous medium; and b) electrochemically decomposing the emulsified organic liquid on a surface of an oscillating electrode in an electrochemical cell, wherein the electrode is oscillating at a frequency of at least 5 KHz. | 01-13-2011 |
20110049058 | Methods and kits for stabilizing oxidizers and sanitizing water - The present invention is directed to a kit and method for preventing a body of water from clouding, comprising: (a) a first container containing a first water treatment composition, the first water treatment composition comprising 2,2-dibromo-3-nitrilopropionamide (DBNPA); and (b) a second container containing a second water treatment composition, the second water treatment composition comprising an oxidizer; wherein the body of water contains polyhexamethylene biguanide (PHMB). The present invention is also directed to a kit and method for remediating a cloudy body of water, comprising: (a) a first container containing a first water treatment composition, the first water treatment composition comprising 2,2-dibromo-3-nitrilopropionamide (DBNPA); (b) a second container containing a second water treatment composition, the second water treatment composition comprising an oxidizer; and (c) a third container containing a third water treatment composition, the third water treatment composition comprising a flocculant; wherein the body of water contains polyhexamethylene biguanide (PHMB). | 03-03-2011 |
20110204000 | METHOD FOR REMOVING SELENIUM FROM WATER - There is provided a method for removing selenium from an aqueous influent, comprising: adding a water-soluble reducing agent to an aqueous influent containing an oxidized selenium compound (Se | 08-25-2011 |
20110220585 | 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 Fe | 09-15-2011 |
20110247986 | RECLAMATION OF FORMATE BRINES - A method of reclaiming a formate brine that includes increasing the pH of a spent formate brine fluid comprising water-soluble polymers; treating the fluid with an oxidizing agent; and removing at least a portion of suspended solids from the fluid is disclosed. | 10-13-2011 |
20120006755 | PROCESS FOR TREATMENT OF WATER CONTAINING AZOLE-TYPE ANTICORROSIVE FOR COPPER - Provided is a process for efficiently removing an azole-type anticorrosive for copper from water containing the azole-type anticorrosive for copper, such as wastewater discharged from a CMP step in a fabrication process of a semiconductor device. Ferrous ions are added to water containing an azole-type anticorrosive for copper, and a resulting insoluble iron-azole complex is separated. After the insoluble iron-azole complex is separated, the remaining TOC components are subjected to ozonolysis. The azole-type anticorrosive for copper can be efficiently insolubilized in the form of an iron-azole complex using ferrous ions, and flocculation/solid-liquid separation can be performed. The water after removal of the insoluble matter formed by the addition of ferrous ions is water from which not only the azole-type anticorrosive for copper but also suspended solids have been removed. Therefore, when an ozone-based advanced oxidation process is performed, ozone can be prevented from being wasted, and TOC components including the remaining azole-type anticorrosive for copper can be decomposed and removed to a high degree by injection of a small amount of ozone. | 01-12-2012 |
20120175314 | METHODS OF SYNTHESIZING AN OXIDANT AND APPLICATIONS THEREOF - Novel devices for synthesizing ferrate and uses thereof are described. One aspect of the invention relates to devices and systems for synthesizing ferrate at a site proximal to the site of use. | 07-12-2012 |
20120193295 | METHOD FOR TREATING EFFLUENT WATERS - A process for treating waste water, effluent streams, e.g., acid mine drainage, containing heavy metals and soluble contaminants is provided. In one embodiment, at least a metal cation is added to the effluent water at a pre-selected pH to form insoluble heavy metal complexes. In one embodiment, the metal cation is a trivalent metal ion, e.g., ferric iron such as in ferric sulfate. In another embodiment, a divalent metal ion such as ferrous sulfate is used. After the removal of the heavy metal complexes, the effluent water is treated with an aluminum salt such as calcium aluminate to remove remaining soluble contaminants, thus producing a treated water stream with reduced levels of contaminants. | 08-02-2012 |
20120234769 | Systems and methods for treating fluid media using nonthermal plasmas - Nonthermal plasma gas injection is applied in conjunction with other treatment means such as a precipitant, to effect chemical treatment of a liquid medium. The combined treatment performs one or more of chemically modifying a component of the medium, activating or enhancing the performance of a treatment material for the medium, and removing one or more chemical component from the medium. The nonthermal plasma can be applied directly in a liquid medium, in an aerosol of the medium, or to a treatment material in contact with or cycled into and out of the medium. Applications include removing contaminants including arsenic from drinking water. | 09-20-2012 |
20120241387 | ADVANCED OXIDATION OF KINETIC HYDRATE INHIBITORS - Advanced oxidation process namely ozonation and Fenton's (hydrogen peroxide/Fe: | 09-27-2012 |
20120292259 | SYSTEM AND METHOD FOR TREATMENT OF PRODUCED WATERS CONTAINING GEL - This disclosure describes novel systems and methods for removing gel from flowback water. The methods and systems include treating acidified flowback water with aluminum chlorohydrate. | 11-22-2012 |
20130048570 | CONCENTRATION OF SUSPENSIONS - Gravity sedimentation of a first aqueous suspension of solid particles in a vessel results in formation of a second aqueous suspension of solid particles in the present invention. The process involves adding at least one organic polymeric flocculant to the first aqueous suspension to form a suspension of flocculated solid. The flocculated solids settle to form a bed of consolidated solids. Introducing an effective amount of an agent into the bed of consolidated solids or into the flocculated solids that are settling leads to formation of the second aqueous suspension. The second aqueous suspension of solid particles has a higher solids content than the first aqueous suspension of solid particles. The agent is a free radical agent or an oxidizing agent. | 02-28-2013 |
20130248456 | Waste treatment process for coal gasification fly ash - Disclosed is an improved water treatment process that operates on a continuous flow of fluids that are subjected to hydrodynamic waves, acoustic ultrasonic waves in combination with injected ozone and electro chemical treatment. The treatment system provides a cost efficient and environmentally friendly process and apparatus for cleaning and recycling fluids as contaminated as coal slurry, as well as other types of fluids having various levels of contaminants such as aerobic and anaerobic bacteria and suspended solids. The volatile organic compounds are reduced to an acceptable level without the use of acids, ion exchange materials, or anti scaling chemicals which is of economical and environmental significance and benefit. | 09-26-2013 |
20140124453 | CHEMICAL CO-PRECIPITATION PROCESS FOR RECOVERY OF FLOW-BACK WATER, PRODUCED WATER AND WASTEWATER OF SIMILAR CHARACTERISTICS - Methods and systems for treating contaminated flow-back water produced by hydraulic fracture are provided. The method involves precipitating metals from the flow-back water stream in a first reaction using at least one oxidizing agent, at least one pH adjusting agent, a source of sulfate and carbonate ions, and at least one co-precipitation agent. The precipitated metals may be dewatered using a first filter and may be used as an additive to drilling mud. The flow-back water may be further purified in a second reaction by addition of at least one pH adjusting agent and hydrated lime to precipitate salts. The precipitated salts may be dewatered using a second filter and may be used as an accelerating additive to concrete. The purified flow-back water may be stabilized by the addition of at least one pH adjusting agent to provide a water stream that may be reused in the hydraulic fracture drilling process. | 05-08-2014 |
20140144844 | METHOD AND APPARATUS FOR TREATING NATURAL GAS AND OIL WELL DRILLING WASTE WATER - A method of treating contaminated water effluent from a well drilling operation. The method comprises decomposing organic contaminants in the effluent by bubbling a gas containing ozone through the effluent; adding a coagulant to increase the particle size of solid particles contained in the effluent; adding a flocculant to increase the particle size of solid particles contained in the effluent, thereby forming floes suspended in the effluent; and filtering the floes from the effluent to produce a filtrate and flocculated solids. The method may further comprise adding the coagulant into a stream of effluent flowing within a first conduit under controlled shear conditions, and adding the flocculant into a stream of effluent containing pin floes flowing within a second conduit under controlled shear conditions. The method may further comprise delivering the effluent containing the suspended floes into a filter through a conduit floating in the effluent contained in the filter. | 05-29-2014 |
20140238941 | Methods, Devices, and Systems for Creating Highly Adsorptive Precipitates - A mixing chamber system for removal of contaminants from a liquid, and related systems and methods, are provided. The mixing chamber system includes a length of pipe having a hollow interior. A plurality of perforated discs are stationarily positioned within the hollow interior in at least a portion of the length of pipe, wherein each of the plurality of perforated discs has a curved profile, wherein a middle portion of each of the plurality of perforated discs is offset from a radial edge of each of the plurality of perforated discs, respectively. | 08-28-2014 |
20140246375 | Electrochemical-based reactor for the removal of free cyanides and iron cyanide from industrial wastewater - The present invention relates to a continuous bipolar electrochemically based reactor for the purpose of destroying free cyanide by direct and indirect oxidation and removing its strong complexes like ferrocyanide and ferricyanide by electrocoagulation. The designed reactor consists of four main sections, including electrooxidation, hydraulic mixing, electrocoagulation, and precipitation tank. The order of sections results in having a combination of reactions which separately remove cyanide and its compounds. The designed reactor shows a high flexibility in terms of handling highly variable kinds and concentrations of cyanide in the industrial wastewater effluents. | 09-04-2014 |
20140246376 | CONCENTRATION OF SUSPENSIONS - A process of concentrating a suspension of solid particles in an aqueous medium comprising introducing into the suspension at least one organic polymeric flocculant and addition of an agent system, in which the solid particles in the suspension are flocculated by the action of the at least one organic polymeric flocculant and the so formed flocculated solid particles settle to form a settled layer of solids suspended in the aqueous medium, wherein the agent system comprises: i) at least one oxidising agent; ii) at least one control agent, | 09-04-2014 |
20140332472 | PROCESS TO MAINTAIN LARGE CLEAN RECREATIONAL BODIES OF WATER - The invention discloses a process to implement and maintain water bodies larger than 15,000 m | 11-13-2014 |
20150041404 | TREATMENT OF ACID MINE DRAINAGE - A method for treating acid mine drainage includes mixing acid mine drainage ( | 02-12-2015 |
20150129507 | TREATMENT OF ARSENIC CONTAMINATED SOIL AND WATER - The present invention is directed to a method for the treatment of an environmental medium contaminated with arsenic, comprising treating such medium with an effective amount of persulfate and zero valent iron. | 05-14-2015 |
20160060144 | METHOD OF REMOVING PARTICULATE SILICON FROM AN EFFLUENT WATER - A method of removing particulate silicon from an effluent water in accordance with various embodiments may include: adding a base to the effluent water, an amount of the added base being sub-stoichiometric with regard to a basic oxidation reaction of an entire amount of silicon contained in the effluent water to ortho-silicic acid or ortho-silicate ions; maintaining a resulting mixture of the effluent water and the base in a predetermined temperature range for a period of time, so that a sediment including silicon is formed; and separating the sediment and the effluent water from each other. | 03-03-2016 |
20160115053 | METHOD FOR REMOVING SELENIUM AND APPARATUS FOR REMOVING SELENIUM - A method for removing selenium according to the present invention comprises: a valence change step of adding an oxidant to a wastewater from a facility that gasifies a fuel containing selenium in a reducing atmosphere, and oxidizing the selenium to change the valence of the selenium, and a solid-liquid separation step of adding a flocculant to the wastewater, forming a floc containing the selenium for which the valence has been changed in the valence change step, and subjecting the floc to solid-liquid separation. | 04-28-2016 |
20190144315 | REMEDIATION AND RECYCLING OF FRAC WATER AND FLOW BACK WATER | 05-16-2019 |
210722000 | Of iron or manganese material | 13 |
20080314839 | Iron composite particles for purifying soil or ground water, process for producing the same, purifying agent containing the same, process for producing the purifying agent and method for purifying soil or ground water - Iron composite particles for purifying soil or ground water, comprise α-Fe and magnetite, and having a ratio of a diffraction intensity D | 12-25-2008 |
20090020482 | Method and Device for Removing Contaminant Trace Species, Especially Arsenic, from Water - A method and a device for purifying water from contaminant trace species, especially arsenic, by co-precipitating trace species during oxidation and precipitation of iron compounds with subsequent separation. The co-precipitation is improved by contacting the water with an iron-containing material prior to oxidation to increase the iron content of the water. Arsenic and other trace species harmful to health may be removed from water effectively and in a simple manner, thus being able to comply with the more restrictive limits of arsenic in drinking water. | 01-22-2009 |
20090084733 | Treatment of iron contaminated liquids with an activated iron solids (AIS) process - The present invention is a method and system for treating iron-contaminated water (e.g., mine drainage) using an innovative treatment approach identified herein as the Activated Iron Solids (AIS) Process. The AIS process is capable of oxidizing and removing iron as iron oxides from iron-contaminated waters (such as, mining-related discharge, groundwater, surface water and industrial waste streams) producing a clean effluent. The AIS process is performed in a single or multiple tank system in which high concentrations of AIS are suspended through mechanical mixing to maintain a catalytic surface chemistry environment that increases iron removal thousands times faster than would naturally occur and hundreds times faster than existing arts (e.g., aerobic pond passive treatment). The AIS process can utilize inexpensive alkaline material (such as, pulverized limestone) where initial mine drainage alkalinity (mg/L as CaCO | 04-02-2009 |
20110163042 | REMOVAL METHOD OF MANGANESE FROM WASTE WATER - A removal method of manganese in which manganese is removed by precipitating manganese selectively from sulfuric acid waste water containing aluminum, magnesium and manganese with inhibiting the precipitation of magnesium. | 07-07-2011 |
20110198297 | WATER FILTRATION SYSTEM - A water filtration system ( | 08-18-2011 |
20120031850 | Extraction of Sulfate from Water - Sulfate anions and divalent metal ions, such as magnesium, strontium and barium, in water are removed by treating the water with polyaluminum chloride, usually together with lime, to form ettringite and similar crystalline species which are readily removable by settling, filtration and the like. Iron is also removed by oxidation in a variation of the process. The process is particularly useful for treating aqueous solutions used in well treatment, where flowback fluids can provide some of the divalent metal ions necessary to form the ettringite-like materials, thus reducing the amount of lime otherwise necessary and further facilitating recycling of the fluid. | 02-09-2012 |
20130001173 | METHOD FOR A TREATMENT FOR WASTEWATER CONTAINING ALUMINUM, MAGNESIUM, AND MANGANESE - The wastewater treatment method is to obtain demanganized wastewater, through a step wherein an acid or an alkali is added to sulfuric acid acidified wastewater to adjust pH to not less than 4.0 and not more than 6.0, whereby the sulfuric acid acidified wastewater is separated into a dealuminized solution and an aluminum precipitate; a step wherein a slurrying solution is added to the aluminum precipitate to form a slurry, then an alkali is added to adjust pH to not less than 9.0 and not more than 9.5, whereby an pH-adjusted aluminum precipitate slurry is formed; a step wherein an alkali is added to the dealuminized solution to adjust pH to not less than 8.0 and not more than 9.0; and others. | 01-03-2013 |
20130068697 | PROCESS FOR DEPLETING CALCIUM AND/OR IRON FROM GEOTHERMAL BRINES - This invention relates generally to processes for extracting iron and/or calcium from geothermal brines. | 03-21-2013 |
20130140243 | Method and Plant for Purifying Raw Water - A method of purifying raw water comprises the steps of supplying the raw water to a generally vertical, open-ended inlet cylinder ( | 06-06-2013 |
20130213896 | METHODS FOR TREATING A FERROUS METAL SUBSTRATE - Disclosed are methods for treating and coating a ferrous metal substrate, such as cold rolled steel, hot rolled steel, and electrogalvanized steel. These methods include contacting the ferrous metal substrate with an aqueous pretreatment composition comprising: (a) a Group IIIB and/or IVB metal compound; (b) phosphate ions; and (c) water. Also disclosed are off-shift methods of removing iron from the pretreatment bath. | 08-22-2013 |
20130284678 | METHODS AND DEVICES FOR MEASURING THE CONCENTRATION OF AN ADDITIVE - An apparatus and methods for measuring the concentration of an additive are disclosed. The apparatus comprises a treatment stream ( | 10-31-2013 |
20130319951 | Calcium and Aluminum Chlorides for Sulfate Removal from Water - Sulfate anions and divalent metal ions in water are removed by treating sulfate-containing water, at a pH of 11-12.5, with aluminum chloride and calcium chloride, optionally together with lime, to form solid ettringite and similar crystalline species. Sulfate is removed as part of the ettringite or ettringite-like materials, but calcium content can be reduced at the same time even though calcium chloride is used as an additive to the treated water. Lime may be used also as a supplemental source of calcium and to help raise the pH. Iron may also be removed by oxidation in a variation of the process. In well treatment, divalent metal ions in flowback fluids can reduce the amount of calcium otherwise necessary to form the solid materials, thus further facilitating recycling of the fluid. | 12-05-2013 |
20140144845 | METHOD FOR WATER TREATMENT REGENERATION STAGE - Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system. | 05-29-2014 |