| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 210716000 | Including step of manufacturing inorganic treating agent | 23 |
| 20090065441 | Heavy Metal Collection System and Heavy Metal Collection Method | 03-12-2009 |
| 20090101588 | Removal of Arsenic from Drinking and Process Water - A method of removing arsenic and heavy metals from water using metal salt hydroxide-gels 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 of DE mixed hydroxide-gels is also effective in removing arsenic from water and heavy metals from water. | 04-23-2009 |
| 20090166296 | WASTEWATER TREATMENT PLANT - Apparatus for treatment of wastewater which has pre-treatment apparatus for treatment of wastewater which has at least two separation tanks connected in series through which the wastewater is passed wherein there is provided a vertically oriented baffle pipe having a closed top and an open bottom which is attached to or located adjacent a side wall of a first tank Which traps triglycerides, fats or other particulate impurities in the wastewater for subsequent passage into a second tank through a primary conduit which interconnects the first and second tanks. The apparatus also includes post-treatment apparatus for treatment of wastewater after passing through an electrocoagulation cell incorporating at least one coagulation tank having a baffle located below a top end of the coagulation tank which has a spray nozzle associated therewith for washing floc off an interior of the tank whereby the floc is discharged through a conduit which extends through a side wall of the tank below the baffle. | 07-02-2009 |
| 20100307985 | METHOD FOR PRODUCING HYDROGEN SULPHIDE AND THE USE THEREOF, IN PARTICULAR, FOR DEPOLLUTING HEAVY METAL-CONTAINING FLOWS - A process for the decontamination of an effluent containing one or more dissolved metals is provided. The process includes producing hydrogen sulphide in an aqueous medium by culturing alkaliphilic sulphate-reducing or thio-sulphate reducing bacteria in the presence of an organic compound serving as an electron donor and in the presence of a sulphurous compound serving as an electron acceptor. The effluent is contacted with the hydrogen sulphide and the dissolved metals are reduced and/or precipitated in the form of metal sulphides. | 12-09-2010 |
| 20120267316 | Apparatus and Method for Purifying and Sterilizing Water Using Nano Catalytic Microelectrolysis - A method for purifying and sterilizing water using nano catalytic microelectrolysis and an apparatus therefore including three units of a nano catalytic microelectrolysis device, a sand filtration and a precise filtration are provided. 1/20 to ⅕ of raw water is delivered into the nano catalytic microelectrolysis. 19/20 to ⅘ of raw water is directly delivered into a neutralization tank to be mixed with nano catalytic microelectrolysis water to kill microorganism, algae and plankton and force suspended solids, colloid, charged particles and etc. to form into relatively large particles which are removed by the precise filtration unit; heavy metal ions gather at a cathode of the microelectrolysis to form cathode sediment to be removed; organic compounds are oxidatively decomposed by strongly oxidative substances produced by the microelectrolysis; phosphate ions move towards a cathode polarization layer and act with divalent cations on a cathode surface to produce phosphate precipitate to be removed. | 10-25-2012 |
| 20120292258 | Treatment Apparatus and Methods - Various methods and apparatus are disclosed that relate to one or more aspects of a treatment system that circum-neutralizes the pH of an aqueous stream, removes one or more heavy metals from the aqueous stream, circum-neutralizes the pH of a CCR supply, and/or removes one or more heavy metals from the CCR supply. | 11-22-2012 |
| 20130105401 | Method for Removing Phosphorus and Nitrogen Contained in Sewage or Wastewater Using Iron Ore Wastewater | 05-02-2013 |
| 20130161264 | Cost-Efficient Treatment Of Fluoride Waste - A method and system for processing fluoride-containing wastewater includes treating the wastewater with brine (waste) created by the regeneration process implemented by in ion exchanging water softener. The brine, which is typically disposed of, contains both calcium and magnesium salts, in varying concentrations and ratios. The regeneration process brine is added to the fluoride-containing wastewater within a reaction tank, and the fluoride ion concentration is monitored. When the fluoride ion concentration falls below a predetermined level (e.g., 15 ppm), the flow of regeneration process brine is stopped. A pH controller monitors the pH within the reaction tank, and adds a basic agent to ensure that the pH remains above a predetermined level (e.g., pH>9). The pH control results in a clear effluent, and a sludge having a high settling rate and a high dewater ability. | 06-27-2013 |
| 20130175224 | 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. | 07-11-2013 |
| 20140042101 | 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. | 02-13-2014 |
| 20140151307 | ACIDIFICATION PRE-TREATMENT FOR UV WATER DISINFECTION - A pre-treatment method injecting sulfur dioxide into waters containing suspended solids to undergo ultra violet disinfection to form sulfurous acid (H | 06-05-2014 |
| 20150076077 | HYDRODYNAMICALLY ISOLATED, ION-GENERATOR APPARATUS AND METHOD - An apparatus and method isolating ion generation from target metal precipitation and flocculation rely on an ion generator and a precipitation reactor distinct, separated, optimized, and otherwise independent from each other as to flow regime and contained fluid at all times. No co-habitation of ion generation and precipitation nor their flow regimes is permitted in a single unit. Plug flow at hyper turbulence in the ion generator contrasts with quiescent to laminar flows in the precipitation reactor. Coating sacrificial anodes is avoided by avoiding over driving currents for ionization at the anode. A precipitation reactor is optimized by a dwell time effective to precipitate and flocculate heavy target metal precipitants and sacrificial ions relying on weak forces not tolerated by inertial forces in the ion generator. | 03-19-2015 |
| 20160031732 | 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. | 02-04-2016 |
| 210717000 | In situ | 10 |
| 20100084347 | FLUID FILTER MONITORING DEVICE - An indicator for the status of the filter is provided. The indicator comprises at least one erodable member in contact with the source fluid and a visual indication arrangement that permits a viewer to gauge the appearance of the erodable member to thereby gauge the filter status. The erodable member is eroded by interaction with the fluid or with an element within the fluid. The indicator may be incorporated as an integral component of a filter or may be a stand-alone device to be incorporated into a filter or filtration system. | 04-08-2010 |
| 20100320155 | Methods For Removing Dissolved Metallic Ions From Aqueous Solutions - The invention provides methods for treating aqueous solutions to remove dissolved metallic ions. | 12-23-2010 |
| 20110094969 | REMOVAL OF ARSENIC FROM DRINKING AND PROCESS WATER - A method of removing arsenic and heavy metals from water using metal salt hydroxide-gels 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 of DE mixed hydroxide-gels is also effective in removing arsenic from water and heavy metals from water. | 04-28-2011 |
| 20120118831 | PROCESS FOR ENHANCED REMEDIATION OF CONTAMINATED WASTEWATERS, SOILS AND WASTEFORMS - The present invention provides reagents that may be useful for treating wastes such as impure aqueous materials including wastewater to remove a significant proportion of the heavy metals that may be contained therein. The reagents include a calcium aluminosilicate (CAS) source and may include one or more of the following elements as an oxide: calcium oxide, aluminum oxide, silicon oxide, iron oxide, magnesium oxide, sodium oxide, potassium oxide, and sulfate. Further, the reagent comprises lime either as CaO or Ca(OH) | 05-17-2012 |
| 20120223022 | CONTAMINANT REMOVAL FROM WATERS USING RARE EARTHS - The present disclosure is directed to the use of rare earth-containing additives, particularly rare earth-containing additives comprising rare earths of plural oxidation states, to remove, particularly from recreational waters, various target materials, such as disinfectant by-products and precursors thereof, phosphates, and organophosphates. | 09-06-2012 |
| 20130341283 | METHOD FOR PRODUCING A POORLY SOLUBLE CALCIUM-ARSENIC COMPOUND - The invention relates to a method for precipitating pentavalent calcium arsenate from an acidic solution, in which arsenic is at least partially in trivalent form. The acidic solution is neutralised before being routed to an arsenic oxidation stage,and a poorly soluble calcium-arsenic compound is precipitated from the solution, in which all the arsenic is pentavalent. | 12-26-2013 |
| 20150027958 | Method and Apparatus for the Treatment of Mine Water - A method and apparatus for the treatment of acidic surface water that has an initial pH and that contains one or more dissolved metals, the method including: (a) extracting a continuous stream of acidic surface water from an acidic surface water supply; (b) mixing a powdered neutralizing agent, having a particle size in the range of 8 micron to 500 micron, in the stream of acidic surface water to produce an alkaline slurry; and (c) dispersing the alkaline slurry for a dosing period over at least a portion of the acidic surface water supply to treat the acidic surface water supply; whereby the treatment of the acidic surface water supply will result in the pH of the acidic surface water supply increasing from its initial pH, and at least a portion of the one or more dissolved metals precipitating out of the acidic surface water supply to form a supernatant and a metal-rich precipitate. | 01-29-2015 |
| 20160060148 | METHOD AND SYSTEM FOR THE TREATMENT OF PRODUCED WATER AND FLUIDS WITH CHLORINE DIOXIDE FOR REUSE - Embodiments of the invention relate generally to methods and systems for treating aqueous systems associated with industrial wastewater applications, in particular gas and crude oil drilling, pumping and production, in order to reduce or eliminate contamination and allow the water that is treated to be reused, in particular, to be reused for hydraulic fracturing. | 03-03-2016 |
| 20160075575 | SPECIAL PALLADIUM CATALYST FOR SEWAGE TREATMENT AND USE THEREOF - A special palladium catalyst for sewage treatment includes a stainless steel carrier, and a metal palladium layer uniformly distributed on the surface of the stainless steel carrier. A thickness of the palladium layer is 1 nm-5 μm. A preparation method and use of the special palladium catalyst for sewage treatment includes contacting sewage with a palladium catalyst described above. | 03-17-2016 |
| 20160115050 | WASTEWATER TREATMENT PROCESS - A wastewater treatment process capable of selectively and efficiently separating and removing a manganese precipitate with high purity from sulfuric acid-acidic wastewater containing aluminum, magnesium, and manganese. In the wastewater treatment for a sulfuric acid-acidic wastewater containing aluminum, magnesium, and manganese, a magnesium oxide is used for part or all of the neutralizing agent to be added, the magnesium oxide is produced through the following steps (1) to (4): (1) effluent wastewater obtained by separating aluminum and manganese from sulfuric acid-acidic wastewater is concentrated, and calcium contained in the effluent wastewater is precipitated as a calcium sulfate; (2) the solution obtained in (1) is further concentrated, and magnesium is precipitated and separated as a magnesium sulfate; (3) the magnesium sulfate separated in (2) is roasted together with a reducing agent to obtain a magnesium oxide and sulfurous acid gas; and (4) the magnesium oxide obtained in (3) is washed. | 04-28-2016 |
