Class / Patent application number | Description | Number of patent applications / Date published |
210752000 | Plural spaced feedings | 16 |
20080197085 | REDUCTION OF HYDROGEN SULFIDE IN WATER TREATMENT SYSTEMS OR OTHER SYSTEMS THAT COLLECT AND TRANSMIT BI-PHASIC FLUIDS - A method for reducing noxious sulfur species including hydrogen sulfide in sewage collection systems including force mains is disclosed, where the method involves administering a an effective amount of a composition including a water soluble sulfur scavenger and an oil soluble sulfur scavenger in the presence of sufficient surfactant to produce a homogeneous product. | 08-21-2008 |
20080308505 | System and Process for Removal of Phosphorous and Ammonia from Aqueous Streams - We disclose a process for the removal of phosphorous and ammonia from an aqueous stream by contacting the aqueous stream with magnesium and base in a first zone having a first pH, to form an (n−1)th mixed stream and a first portion of struvite; separating the (n−1)th mixed stream from the first portion of struvite; removing at least some struvite from the first portion of struvite; contacting the (n−1)th mixed stream with base in an nth zone, wherein n is an integer incrementing from 2 to n | 12-18-2008 |
20090050575 | Control of development of biofilms in industrial process water - There is provided a method of inhibiting the development of a biofilm adjacent a surface, the method comprising intermittently applying a biofilm inhibiting substance to a collection of microorganisms having biofilm developing potential. Other embodiments are also described. | 02-26-2009 |
20090095692 | RETRIEVABLE DIFFUSER MODULE WITH INTERNAL BALLAST/BUOYANCY CHAMBER - A diffuser module and system for diffusing gas into liquid such as in aeration/mixing of wastewater. Each module has a header pipe and diffusers which receive gas from the header pipe. Each pipe is equipped with a smaller internal pipe arranged concentrically to provide an annular space which receives the gas and supplies it to the diffusers. The volume within the internal pipe can serve as a ballast chamber or a buoyancy chamber or both. | 04-16-2009 |
20100072144 | METHOD OF TREATING BALLAST WATER OF SHIP - A method of treating a ballast water for sterilizing bacteria, microorganisms or organisms in the ballast water in a hold or ballast tank of a ship, has the steps of: sterilizing the bacteria, microorganisms or organisms by adjusting a residual chlorine concentration in the ballast water to 1 mass ppm or more and 1000 mass ppm or less with a hypochlorite, and removing the residual chlorine in the ballast water with a sulfite. | 03-25-2010 |
20100096340 | CONTROL OF DEVELOPMENT OF BIOFILMS IN INDUSTRIAL PROCESS WATER - There is provided a method of inhibiting the development of a biofilm adjacent a surface, the method comprising intermittently applying a biofilm inhibiting substance to a collection of microorganisms having biofilm developing potential. Other embodiments are also described. | 04-22-2010 |
20110049061 | METHOD FOR TREATING ODOR IN WASTEWATER - Disclosed herein is method of treating wastewater to remove odorous sulfide compounds. The method includes measuring a concentration of a dissolved sulfide compound contacting the wastewater with an enhanced hydrogen peroxide solution to produce a molecular ratio of not more than four to one of hydrogen peroxide to the dissolved sulfide compound in the wastewater, and maintaining the wastewater under conditions sufficient to lessen a concentration of the dissolved sulfide compound in the wastewater to an acceptable level after an enhanced residence time of the hydrogen peroxide in the wastewater. | 03-03-2011 |
20110114570 | APPARATUS AND A METHOD FOR CONTINUOUS THERMAL HYDROLYSIS OF BIOLOGICAL MATERIAL - A method for performing continuous thermal hydrolysis of sludge by feeding the sludge into a tube reactor subsequently elevating the temperature and pressure in the reactor. The sludge is cooled by introducing water into the sludge instead of cooling the sludge with a heat exchanger or a similar unit. | 05-19-2011 |
20110290740 | WASTE TREATMENT AND DISINFECTION UNIT - A waste treatment system and method for treating a substantially liquid waste stream. The waste treatment system includes a conditioning stage for conditioning the waste stream for treatment. A metal ion generation stage is provided for generating metal ions for disinfection of the waste stream and for catalytic oxidation. A wet oxidation stage is provided in fluid flow communication with the metal ion generation stage for denaturing the waste stream using an oxygen-containing gas. A chelation stage in fluid flow communication with the oxidation stage is provided for deactivating metal ions in the waste stream. | 12-01-2011 |
20120160779 | CONTROL OF DEVELOPMENT OF BIOFILMS IN INDUSTRIAL PROCESS WATER - There is provided a method of inhibiting the development of a biofilm adjacent a surface, the method comprising intermittently applying a biofilm inhibiting substance to a collection of microorganisms having biofilm developing potential. Other embodiments are also described. | 06-28-2012 |
20120279928 | METHOD AND DEVICE FOR TREATING FLUORINE-CONTAINING WATER - A high percentage of fluorine in fluorine-containing water is removed and high purity calcium fluoride is recovered when treating the fluorine-containing water by passing the same through calcium carbonate packed towers provided in series in a plurality of stages, preferably two stages. In a method including passing fluorine-containing water through calcium carbonate packed towers provided in series in a plurality of stages to remove the fluorine in the fluorine-containing water and recover calcium fluoride, the calcium carbonate towers are packed with calcium carbonate with a volume mean diameter of 30 to 150 μm. By the use of calcium carbonate granules with a volume mean diameter of 30 to 150 μm, an increase in the purity of the recovered calcium fluoride and an increase in the fluorine removal ratio can be realized with a relatively small device. | 11-08-2012 |
20130075345 | Gas Dispersion Apparatus for Improved Gas-Liquid Mass Transfer - The invention discloses an apparatus and method to uniformly disperse ozone gas bubbles into liquid phase water for the treatment thereof. The apparatus consists of a water inlet section connected with a section with structured packing or monolith having parallel flow channels. A portion of the influent water is withdrawn from the main water stream as a side stream, pressurized by a pump, mixed with ozone-containing gas, and then injected back into the main water flow. The side stream may be divided into multiple streams either before or after mixing with the ozone-containing gas, and then injected into the main flow section upstream of the packed section. In alternate embodiments, the ozone-containing gas can be injected directly through the gas diffusers just upstream of the packed section in order to achieve uniform concentration of gas and liquid in the fluid entering the monolith. | 03-28-2013 |
20130200008 | METHODS OF IMPROVING CHITOSAN FOR WATER PURIFICATION - Methods for preparing a chitosan-based material for use in a halogen water treatment system are described. Treating chitosan or chitin with a compound selected from the group consisting of an acid, a base, a mild halogenating solution and combinations thereof provides a chitosan-based material that displays reduced leakage of halide ion. Water treatment systems and methods for treating water comprising at least one contaminant are also described. | 08-08-2013 |
20130264293 | USE OF PERACETIC ACID/HYDROGEN PEROXIDE AND PEROXIDE-REDUCING AGENTS FOR TREATMENT OF DRILLING FLUIDS, FRAC FLUIDS, FLOWBACK WATER AND DISPOSAL WATER - Methods for the use of peracid compositions having decreased hydrogen peroxide concentration for various water treatments, including oil- and gas-field operations, and/or other aseptic treatments are disclosed. In numerous aspects, peracetic acid is the preferred peracid and is treated with a peroxide-reducing agent to substantially reduce the hydrogen peroxide content. Methods for using the treated peracid compositions for treatment of drilling fluids, frac fluids, flow back waters and disposal waters are also disclosed for improving water condition, reducing oxidizing damage associated with hydrogen peroxide and/or reducing bacteria infestation | 10-10-2013 |
20150101991 | METHOD AND APPARATUS FOR WATER TREATMENT - A method and apparatus for the treatment of water and, more particularly, to the mineralization of water in order to improve pH, hardness, turbidity, and/or alkalinity is described. More particularly, a system is provided for the treatment of water that needs additional hardness, alkalinity, and/or pH adjustment while also meeting turbidity requirements. The use of sodium hydroxide and other methods for avoiding turbidity problems can be eliminated and/or minimized. | 04-16-2015 |
20160096752 | WASTEWATER TREATMENT - An antimicrobial method of treating wastewater and a wastewater antimicrobial dispenser containing an antimicrobial agent for treating a body of wastewater to kill microorganisms by increasing the concentration metal ions therein. The antimicrobial method includes the step of increasing the effectiveness of the biocidal component in the body of wastewater to thereby lessen the need for a supplemental biocide by adding a compound containing a hydantoin ring where the compound containing a hydantoin ring may or may not have any antimicrobial properties. The antimicrobial agent including a source of biocidal metal ions and a compound containing a hydantoin ring where the antimicrobial agent may be a powder, a liquid a solid or combinations thereof. | 04-07-2016 |