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7618538 |
Procedure for elimination of boron from sea-water by reverse osmosis membranes
The present invention relates to a procedure for elimination of boron from sea-water by reverse osmosis membranes characterized in that it comprises:
adding to sea-water a composition...
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7582444 |
Use of flocculating agents for separating the solid residue in hydrolysed fermentation substrates
Process for improving the separation efficiency of residual solid matter from the liquid phase of an aqueous acid hydrolysate of a naturally occurring polysaccharide comprising dissolved sugars,...
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7560031 |
Process for treating pond water
A process for the treatment of phosphoric acid plant pond water facilitating the recovery of phosphorus values from the input pond water. In certain aspects the process recycles solids from a later...
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7497956 |
Method for stabilizing and conditioning urban and industrial wastewater sludge
The invention concerns a method for stabilizing and conditioning wastewater sludge. The invention is characterized in that it consists in treating sludge in an acid environment (3.0≦pH≦5.0),...
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7497954 |
Apparatus for separation of water from oil-based drilling fluid and advanced water treatment
An apparatus for separating water from oil-based drilling fluid includes an separation tank, a chemical treatment apparatus having one or more de-oiling polymer preparation tanks, and a dissolved...
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7494592 |
Process for combining solids thickening and dewatering in one vessel
Process involving repeatedly applying some of the liquid composition to the granular filter media to remove water from the liquid composition by passing through the granular filter media with the...
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7491337 |
Method and apparatus for removing contaminants from water
A method and apparatus is provided for the purification of water, in particular to the removal of surfactants and optionally organic, inorganic and/or biological contaminants from water using...
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7468137 |
Wastewater treatment process
A wastewater treatment process for treating wastewater comprising a water-based dispersion containing a surfactant, a colorant and silica, as well as other solid matter, wherein the wastewater is...
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7455997 |
Production of fermentation product
A process of producing fermentation product comprising the steps of, (i) forming an acidified suspension of particulate plant derived material comprising a first polysaccharide which is more...
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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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7419604 |
Use of boron compounds to precipitate uranium from water
A method is provided for removing uranium from water. The method includes the mixing of a boron reagent with water contaminated with uranyl dication ions, leading to removal of the uranium from...
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7419602 |
Selenium removal from water
A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment...
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7410589 |
Hog manure treatment method
The invention relates to a method of treating manure such that odor from the manure is significantly reduced or eliminated and producing therefrom recyclable water, value-added biosolids and...
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7404902 |
Method for treating water
A composition for treating water contained in enclosures, such as swimming pools, spas, whirlpool tubs and cooling towers, which includes at least one boron compound, cyanuric acid, at least one...
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7390416 |
Method for the removal of metals, including a co-precipitation of molybdenum, from wastewater
An improved method to remove metals, including molybdenum, from industrial wastewater, by chemical precipitation of the metals, followed by settling and dewatering of the precipitate.
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7371328 |
Method for treating hog and animal waste
An animal treatment method comprises flushing the animal waste from a barn to a holding tank where the waste is mixed with an alkaline solution to kill pathogens. After neutralization, the solution...
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7344647 |
Process for treating waste water to remove contaminants
Recycled waste water is treated to remove contaminants and produce a sludge cake with a high percentage of solids and to produce a treated recycled waste water that can be discharged into a...
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7335309 |
Method for removing metal compounds from waste water
A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferable 6 to 9; aerating the waste water; adding a flocculating...
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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...
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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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7255795 |
Process for selectively removing molybdenum from liquid mixtures containing it together with vanadium
Process for selectively removing molybdenum from liquid mixtures containing it, in a quantity greater than (200) mg/l, together with vanadium characterized in that it comprises the following steps:...
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7244363 |
Methods for treating heavy halide brines with permanganates
The present invention relates to the use of permanganate in the removal of heavy metal contaminants from heavy halide brines. In some embodiments, the present invention discloses methods of...
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7182873 |
Method of fluoride-containing wastewater treatment
First, a primary fluoric ion concentration detection process is performed, and a primary calcium salt addition process is performed to add calcium salt in a first reaction tank, wherein the dosage...
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7115201 |
Method of treating mine drainage
A method of treating mine drainage water including the step of adding a scale control agent to the mine drainage water and, optionally, adding an oxidizing agent to the mine drainage water and/or...
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7108792 |
Process for cleaning wash water
Agents are used as cleaning agents and also as agents to purify the water in water treatment plants. The agents are a mixture of phosphates and fatty acid salts. Precipitation agents are used such...
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7105094 |
Method for the removal of heavy metals from acidic wastewater and chemical solutions
A method which uses a process reactor having three separate reaction stages to remove high concentrations of heavy metals from acidic wastewater and chemical solutions. During each of three stages...
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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...
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7048854 |
Apparatus for the removal of heavy metals from acidic wastewater and chemical solutions
An apparatus which uses a process reactor having three separate reaction stages to remove high concentrations of 3000 mg/l heavy metals from acidic wastewater and chemical solutions. During each of...
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7033507 |
Method for removing metals from acid mine drainage
A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an...
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7029553 |
Urea sulfate and urea hydrochloride in paper and pulp processing
The present invention relates to the use of urea sulfate or urea hydrochloride, or both, in process streams in the paper and pulping industries to control pH, to bring about flocculation or...
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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...
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7014774 |
Method of treating oil-containing waste water
A method of treating an oil-containing waste water includes adding, where the waste water has been adjusted to have a pH between eight and twelve and have a temperature not higher than 50° C., a...
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7008543 |
Use of chlorine dioxide and ozone for control of disinfection by-products in water supplies
A method of oxidation or pathogen inactivation in water supplies using the combination of treatments of chlorine dioxide and ozone in the sequential steps prior to filtration and distribution....
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6982036 |
Chemically enhanced primary sludge fermentation method
A method of treating wastewater to increase effluent volatile fatty acid content consisting of providing wastewater to a primary treatment vessel and adding a select quantity of a chemical,...
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6936177 |
Method for removing metal from wastewater
An object of the present invention is to provide a method for efficiently removing a metal from wastewater formed by subjecting the liquid waste to wet combustion treatment or wet oxidation...
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6932909 |
Method of treating mine drainage
A method of treating mine drainage water including the step of adding a scale control agent to the mine drainage water and, optionally, adding an oxidizing agent to the mine drainage water and/or...
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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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6846420 |
Process for removing oil from solid materials recovered from a well bore
The present invention provides a process and an additive package for removing oil from solid material recovered from a well bore, e.g., drill cuttings and produced sand. In this process, the solid...
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6846416 |
Process for treating chromate waste liquid
The invention relates to a process for treating a chromate waste liquid containing an organic acid component. This process includes (a) adding a chromium precipitation accelerating agent containing...
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6830696 |
Treatment of spent pulping liquor with lignin separation to recover alkali pulping chemicals in manufacture of paper pulp
A method of treating spent alkaline pulping liquor (black liquor) includes the steps of providing black liquor containing lignin, and acidulating a phosphate containing material, wherein phosphoric...
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6808636 |
Treatment of sewage sludge
A method for reducing sludge viscosity of a sewage sludge having a solids concentration of at least 10% (w/w). The method comprises the steps of increasing the pH of the sludge to 9.5-12.5%, at...
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6797195 |
Method for recovering and separating metals from waste streams
A method for recovering and separating precious and non-precious metals from waste streams, which removes, separates, and recovers such metals in a cost effective manner with more than 95% removed...
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6780330 |
Removal of biomaterials from aqueous streams
A process is provided which can be used to treat aqueous streams comprising soluble biomaterials, especially proteins, wherein the concentration of soluble biomaterials is substantially reduced....
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6776914 |
Process for treating liquid septage
A process for treating liquid septage and other biosolids having the steps of placing a known amount of liquid septage in a tank, mixing in a sufficient quantity of alkaline material to raise the...
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6761775 |
Rinsewater separable and recyclable anaerobic curing impregnation compositions
The present invention relates to anaerobic curing impregnation sealant compositions which are readily separable from water upon mixing.
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6755973 |
Waste water treatment process for animal processing contaminant removal
A process and system for removing animal processing contaminants and fats, oils, and greases from large volume quantities of waste water. In the process, a waste water stream containing the...
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6746611 |
Method and composition for scavenging sulphide in drilling fluids and composition
An environmentally friendly method and composition is provided for removing hydrogen sulphide from fluids at high pH. The method and composition are particularly suited for removing hydrogen...
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6712910 |
Rinsewater separable and recyclable heat curing impregnation compositions
The present invention relates to heat curing impregnation sealant compositions, which are readily separable from water upon mixing.
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6676840 |
Fat and protein removal from process streams
The precipitation and removal of suspended fat and protein components and other suspended solids from a given solution can be accomplished by the addition of an aluminate to complex with the fat...
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6673247 |
Sludge dewatering and pasteurization process
A process for dewatering and reducing pathogens in liquid waste sludge having a liquid component and a sludge solids component. Alkaline material is added to the liquid waste sludge. Flocculent may...
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