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7591952 |
Water treatment mixture and methods and system for use
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...
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7569737 |
Method for excluding salt and other soluble materials from produced water
A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection...
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7560028 |
Complex admixtures of clathrate hydrates in a water desalination method
Disclosed is a method that achieves water desalination by utilizing and optimizing clathrate hydrate phenomena. Clathrate hydrates are crystalline compounds of gas and water that desalinate water...
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7510660 |
Contaminant removal method for a body of water
Pollutants, such as heavy metals, phosphorus, and pathogenic organisms, are removed from water by adding a chemical coagulant to water within an enclosure. With mixing, coagulation and flocculation...
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7470330 |
Method for dissolving oilfield scale
A method of removing metal scale from surfaces that includes contacting the surfaces with a first aqueous solution of a chelating agent, allowing the chelating agent to dissolve the metal scale,...
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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...
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7374690 |
Processes for removing oil from solid wellbore materials and produced water
Processes for removing oil from a solid wellbore material such as drill cuttings or water such as produced by a subterranean formation include contacting the solid material/water with an...
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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;...
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7285222 |
Method for recycling sludge during waste-water treatment
A method for recycling sludge during waste-water treatment firstly utilizes a process of chemical coagulation to produce sludge rich in copper ions. The sludge is then leached in a sulfuric acid...
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7255794 |
Hydrate-based reduction of fluid inventories and concentration of aqueous and other water-containing products
Toxic waste waters polluted with high levels of chemical byproducts of various industrial processes (e.g., waste water held in industrial holding ponds) are treated using gas hydrate to extract and...
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7037432 |
Buoyant media flotation
A clarification system for fluids in which particles are separated from the fluid by flotation and in which the buoyant media inducing the flotation is recycled. Flotation can be assisted by a...
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7001525 |
Method for the treatment of water by ballasted flocculation and gravity separation with variable function modes
The invention relates to a method for treatment of water, permitting the physico-chemical treatment of water, including a ballasted flocculation stage using a granular ballast material with a...
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6966993 |
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...
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6931916 |
Viscometer sag test shoe
Methods and apparatus for measuring sag properties of a drilling fluid using a rotary viscometer. An insert, or shoe, is placed at the bottom of the heat cup containing the fluid to be tested. A...
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6919031 |
Method of treating water and wastewater with a ballasted flocculation process and a chemical precipitation process
The present invention is directed to a method and apparatus for the treatment of water and wastewater. In one embodiment, a method of treating water according to the present invention includes...
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6896815 |
Methods for removing heavy metals from water using chemical precipitation and field separation methods
A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation” technology such as magnetic separation, dissolved air...
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6824692 |
Installation for measuring concentration in dense granular material of a flow and water treatment system comprising same
The invention concerns an installation for measuring the concentration in dense granular material in a flow comprising a liquid, a dense granular material and suspended fine particles. The...
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6821439 |
Water purification using organic salts
Water purification using organic salts. Feed water is mixed with at least one organic salt at a temperature sufficiently low to form organic salt hydrate crystals and brine. The crystals are...
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6821384 |
Process for the treatment of fly ash, using hydrochloric acid
The invention relates to a process for the treatment of fly ash accumulating in the electro-filter of the soda recovery unit in a sulfate cellulose mill, the ash containing primarily Na sulfate, Na...
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6797846 |
Fibrous crystal aggregates, preparation method thereof and use thereof
A crystal substance formed by precipitating as fibrous aggregates by making a metal aliphatic carboxylate dissolve completely in pure water, stirring, and gradually cooling the resulting solution....
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6689277 |
Treatment of liquids with ballasted flocculation
In the typical embodiments disclosed in the specification, a ballasted flocculation liquid treatment arrangement includes a mixing chamber in which liquid to be treated, flocculating agents and...
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6645386 |
Water treatment method by ballasted floc including a recycling of granular material
The invention concerns a flocculation-decantation method by ballasted flocs using a granular material and a step which consists in treating the sludge derived from flocculation-decantation in a...
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6562952 |
Precipitation of proteins from organic solutions
A process for forming small micron-sized (1-10 μm) protein particles is provided wherein a protein, a solvent system for the protein and an antisolvent for the protein solvent system are contacted...
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6537340 |
Process for recycling materials used in water treatment
A conditioned alum-type water treatment residual is disclosed. A process for the conditioning of alum-type water treatment residual is likewise disclosed. The process includes dewatering the...
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6495047 |
Process for selective coagulant recovery from water treatment plant sludge
Alum, used as a coagulant in water treatment, is recovered from clarifier sludge by adjusting the pH of the sludge downward to produce an aqueous clarifier sludge solution, and contacting the...
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6451092 |
System and process for agglomeration and processing of carbonaceous fines and dust
A system and process for agglomerating and processing carbonaceous fines is provided. The process includes powdering the carbonaceous fines, mixing the powdered carbonaceous fines with an organic...
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6280630 |
Process for the treatment of effluent streams
This invention relates to a process for removing sulphates and calcium from a water stream which includes the steps of: combining the water stream and an amount of amorphous aluminum trihydroxide...
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6277285 |
Process for the clarification of liquids and suspensions
Process employing the technique of ballasted flocculation with a step of injection, into the liquid to be clarified, of a ballast consisting of a granular material and of a polymer, followed by a...
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6245240 |
Treatment of a solution containing iron salts
Provided herein is a process for treatment of solutions which contain ferrous, ferric and soluble manganese species which process comprises addition of an oxidizing agent to such a solution to...
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6235203 |
Crystallization process for removing fluoride from waste water
The present invention provides a crystallization process for removing fluoride from waste water. Fluoride-containing waste water is introduced into a fluidized bed crystallizer provided with a...
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6232518 |
Removal of benzene from organic streams using cyclodextrins
A method for separating benzene from a hydrocarbon mixture containing benzene and at least one other organic material is carried out by treating the hydrocarbon mixture with at least one...
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6221254 |
Purification of liquid streams using carbon dioxide
A method of purifying an aqueous liquid stream is provided, wherein the liquid stream is pressurized and contains proteinaceous materials, such as blood, and suspended solids, comprising the...
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6210589 |
Process for removing fluoride from wastewater
A process for removing fluoride from wastewater is presented. Calcium (or magnesium), sodium and aluminum reagents are added into a fluidized bed crystallizer to remove most of the fluoride in...
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6210588 |
Method for the physico-chemical treatment of effluents in particular surface water for consumption
Process for the physico-chemical treatment of effluent, especially of surface water intended for consumption, comprising the successive steps of coagulation, flocculation and settling, a contacting...
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6004434 |
Method of recycling cleaning solvent
A method of treating cleaning solvent used to clean mechanical parts. The method includes adding to the cleaning solvent a treating composition selected from the group of C 5 -C 14 alcohols, C 2 ...
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5976383 |
Recycle process for removing dissolved heavy metals from water with aluminum particles
Aluminum particles are reacted with heavy metal ions in a first acidic aqueous solution to form heavy metallic particles that are suitable for recycling and reuse when recovered from the first...
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5932791 |
Method and apparatus for the continuous determination of gaseous oxidation products
A method is proposed for the contiuous determination of gaseous oxidation products from industrial process, drinking and/or waste water, particularly for determining the TOC value, at least the...
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5928517 |
Water-soluble polymers for recovery of metals from solids
A process of selectively separating a target metal contained in a solid matrix from the solid matrix by contacting a solid matrix containing a target metal with an aqueous solution including a...
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5888404 |
Method for treating waste water sludge
The invention relates to a method for treating waste water sludge comprising at least one metal originating from a waste water treatment coagulant, and phosphorus and heavy metals in order to...
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5855793 |
Method of treating waste water to remove harmful ion by coagulating sedimentation
The invention relates to the treatment of waste water containing a harmful ion such as a heavy metal ion or fluorine ion by the coagulating sedimentation method using an inorganic coagulant such as...
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5800717 |
Water and wastewater treatment system with internal recirculation
A sedimentation device for treating water and wastewater utilizing differential sedimentation and recirculation in an internal recirculation reactor with an upflow zone and a downflow zone within a...
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5800716 |
Processes for the treatment of acidic liquors and for the production of commercial products thereby
A process for the treatment of aqueous acidic liquors containing dissolved aluminum and/or iron compounds to produce an aluminum and/or iron sulfate water-treatment product is characterized by the...
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5770091 |
Method of plain sedimentation and physical-chemical sedimentation of domestic or industrial waste water
An untreated flow of waste water is normally introduced into a plain sedimentation unit during plain sedimentation periods to separate it into sand and a flow treated by plain sedimentation. During...
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5766485 |
Color removal from effluent waters
Alum process residues (APR) are used to remove colored contaminants from waste waters. In addition, in accordance with the invention, up to 0.1% by weight of alum and up to 5 ppm of a...
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5759410 |
Process for recovering mercapto-s-triazines from silver precipitate
There is provided a process for converting a silver-mercapto-s-triazine precipitate to a solid containing silver and a solution containing mercapto-s-triazine by contacting the...
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5674402 |
Method for the treatment of water treatment sludge
A method for the treatment of sludge obtained from such a water treatment process wherein an aluminium or iron chemical is used as a coagulant, so as to reduce the amount of sludge, which method...
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5616168 |
Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper
Impurity streams generated during the metallurgy of copper are hydrometallurgically processed at ambient pressure for recovery of primary values in an energy-efficient manner and with the capture...
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5587085 |
Method for dewatering particles
Fine particles are dewatered in an energy efficient process in which a non-polar liquid or a mixture of different hydrophobic liquids are used to displace the water from the particle surface....
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5564105 |
Method of treating a contaminated aqueous solution
A borated aqueous solution from a nuclear reactor coolant system dilute chemical-decontamination process or from an equipment washing process which has been contaminated with radioactive metals or...
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5547583 |
Method for separating contaminants from solution employing an organic-stabilized metal-hydroxy gel
Metals and organics are extracted from solution by co-precipitating them with a gel comprising aluminum hydroxide and a complexing agent such as EDTA. After the gel is processed to remove the...
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