Abstract: A method for isolating a humic substance from alumina process liquor is provided herein. Separate from or within the method, bauxite is processed to form the alumina process liquor. The method includes providing a diallyldimethylammonium chloride-containing polymer. The method further includes providing an amine-containing polymer. The method further includes combining the diallyl dimethyl ammonium chloride, the amine-containing polymer, and the alumina process liquor, to isolate the humic substance from the alumina process liquor.

Abstract: A cleaning device is provided. The cleaning device includes a driving roller, a driven roller, a flexible cleaning belt sleeved on the driving roller and the driven roller, a garbage collection box disposed on one side of the cleaning belt, a brush disposed over the garbage collection box, a sewage collection tank, a clean water tank and a water squeezing roller disposed on the side of the cleaning belt. The garbage collection box is provided with a guide plate near one end of the cleaning belt, and the guide plate corresponds to the outer side of the cleaning belt. The sewage collection tank and the clean water tank are located downstream of the garbage collection box along the moving direction of the cleaning belt, and the water squeezing roller corresponds to the sewage collection tank.

Abstract: Provided is a dispersion liquid for water purification, including: water; a powder of Corchorus olitorius; and a polymeric flocculant, wherein the powder of Corchorus olitorius and the polymeric flocculant are contained in a total amount of from 0.01% by mass through 0.5% by mass relative to the water, wherein the dispersion liquid for water purification has a viscosity of from 20 mPa·S through 500 mPa·S, and wherein a median diameter of a solid in the dispersion liquid for water purification is from 100 micrometers through 400 micrometers.

Abstract: The present invention generally relates to a method for separating solids from liquid in a slurry comprising solids and a liquid (e.g., an aqueous solution). More specifically, the method comprises contacting an effective amount of a high molecular weight polymeric flocculant with the slurry in a tanker truck or as the slurry is flowing to the truck, allowing the solids to settle during a settling time whereby the solids settle to the bottom of the tanker truck, and the liquid is removed from the tanker truck at a level above the settled solids. The high molecular weight polymeric flocculant can comprise repeat units derived from a cationic monomer, an anionic monomer, a nonionic monomer, or a combination thereof.

Abstract: A modified PVA that enables formation of a film superior in cold water solubility, mechanical strength, and chemical resistance is provided. The modified PVA comprises a monomer unit represented by formula (I), and a structural unit represented by formula (II): wherein: a content of the monomer unit (I) is from 0.05 mol % to 10 mol %, and a content of the structural unit (II) is from 0.001 mol % to 0.5 mol % with respect to the total monomer units in the modified PVA; a viscosity average degree of polymerization is from 300 to 3,000; and a degree of saponification is from 82 mol % to 99.5 mol %. In the formula (I): R1 represents a hydrogen atom, or a methyl group; and R2 represents —R3—SO3?X+, —R3—N+(R4)3Cl?, or a hydrogen atom, R3 representing an alkanediyl group, X+ representing a hydrogen atom, a metal atom, or an ammonium group, and R4 representing an alkyl group.

Abstract: A method of preparing a drag-reducing composition that includes a dispersion polymer includes steps for preparing the dispersion polymer, steps for incorporating the dispersion polymer into a drag-reducing composition, and steps for using the drag-reducing composition. The step of preparing a dispersion polymer includes preparing an aqueous mixture by adding a water-soluble salt and at least one polymeric dispersant to water and polymerizing one or more water-soluble monomers in the aqueous mixture. Once the dispersion polymer has been combined with the drag-reducing additive, the combination is injected into a subterranean formation, a pipeline or a gathering line.

Abstract: Systems and methods for treating vinasse are disclosed. The methods treat vinasse to generate useable water. The methods include providing vinasse, reacting the vinasse with persulfate to generate an oxidized mixture, reacting the oxidized mixture with peroxide to generate a peroxide-treated mixture, adjusting the pH of the peroxide-treated mixture to above about pH 6 to generate a pH-adjusted mixture, reacting the pH-adjusted mixture with an inorganic coagulant and a low molecular weight cationic polymer to generate solid particles, and removing the solid particles to generate a liquid fraction.

Abstract: The invention relates to a method for preparing a dry cationic hydrogel polymer product. The method comprises polymerization of a reaction mixture comprising ethylenically unsaturated monomers in presence of water and initiator(s) by radical polymerization and obtaining a hydrogel polymer. The hydrogel polymer is comminuted by chopping or shredding, and dried, whereby a dry hydrogel polymer product in powder form is obtained. At least one cationic reverse phase emulsion polymer is added to the hydro polymer at the comminuting step. The invention relates also to a dry cationic hydrogel polymer composition prepared by the method and its use.

Abstract: A process for limiting the level of flooding of a watercourse, notably a wide river, a narrow river and/or one of its tributaries, consisting of injecting into the said watercourse at least one friction-reduction agent.

Abstract: The present invention concerns a method for preparing a polymer comprising a step of radical polymerization of monomers comprising at least monomers (M1) chosen from acrylic acid, one of the salts of same, or the mixture thereof, in which said radical polymerization step is carried out: continuously; at a pH which remains between 3 and 5 during the polymerization step; in the presence of a metabisulfite/persulfate redox pair, for example the sodium metabisulfite/sodium persulfate pair, as a radical initiator, with a metabisulfite/persulfate molar ratio of between 1 and 3.5 and an initiator/monomer molar percentage of between 5% and 18%.

Abstract: Disclosed herein are functionalized polymers comprising ethylene and substituted ethylene segments, which have been crosslinked using a multifunctional thiol to enhance their crosslinking ability. These functionalized polymers are useful as film forming resins in cathodic electrocoating compositions. Also disclosed herein are aqueous dispersion compositions comprising the functionalized polymers and a process for coating various electrically conductive substrates.

Abstract: Flowable liquid suspensions are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyacrylamide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The suspension allows the use of fine powders while reducing potential air quality and safety issues. The suspensions generally settle when mixing is stopped, but a uniform dispersion results when the suspensions are mixed, and the mixed suspensions can be delivered for use. The flocculant suspensions can be used for waste water purification, fiber dewatering, and the like.

Abstract: Methods are disclosed for reducing oil in water emulsions in coking processes. One exemplary method comprises: providing an aqueous stream with an oil in water emulsion; providing a treatment composition, wherein the treatment composition comprises at least one cationic polyacrylamide; and contacting the aqueous stream with the treatment composition.

Abstract: This invention relates to particulate and/or liquid droplet separation processes from liquids containing the same and the use of specific chemical additives to control surface wetting, hydrophobicity and surface forces in such processes.

Abstract: A method of conditioning a membrane biological reactor mixed liquor containing one or more nonionic polysaccharides and/or one or more organic molecules is disclosed.

Abstract: Systems and methods for improving the quality of solids and liquids recovered at atmospheric pressure and temperature from a stillage stream generated as a by-product of an ethanol production process, the recovered solids having higher bio-available amino and fatty acids than evaporation-produced condensed solubles, the recovered liquids having less total solids and total suspended solids than evaporation-produced condensate. A static mixer includes an input for receiving the stillage stream combined with a GRAS anionic polymer, a cylindrical mixing chamber that controllably mixes the stillage stream and the polymer to generate wet flocculated solids and liquid co-product, and a discharge chute that outputs the wet flocculated solids and liquid co-products onto a moving, gravity filter belt having a membrane surface that separates the output from the static mixer into recovered liquids in the form of clarified, thin stillage and recovered solids in the form of dry flocculated solids.

Abstract: The invention relates to a process for the purification of water and/or dewatering of sludges and/or sediments, to the use of a surface-treated calcium carbonate for water purification and/or dewatering of sludges and/or sediments, as well as to the use of a surface-treated calcium carbonate for reducing the amount of polymeric flocculation aids in water and/or sludges and/or sediments and to a composite material comprising a surface-treated calcium carbonate and impurities originated from different sources obtainable by said process.

Abstract: The present invention relates to systems and methods of wastewater treatment that rely primarily on the use of water treatment chemicals to clean wastewater without the need to use filtration mechanisms. The present invention generally provides a system that is less complex and less expensive to operate than wastewater treatment systems in the prior art.

Abstract: A method for treating a suspension of mineral particles in water, such as mineral tailings, includes the step of contacting the suspension of mineral particles in water with a specific water-soluble polymer. This polymer is preferably a water-soluble polymer having an anionicity of between 10 to 55 mol %, and more preferably 20 to 50 mol %. Furthermore, this polymer has preferably a molecular weight between 15 and 40 million daltons, and more preferably between 18 and 30 million. The method involves adding the specific polymer into a thickener containing the tailings to treat, and/or during transport of the suspension to a deposition area for dewatering and solidification, or to the tailings to treat followed by a mechanical treatment such as centrifugation, screw press and filtration.

Abstract: Polymer flocculants are described comprising blends of high molecular weight polyethylene oxide and high molecular polyacrylamides. When introduced in desired amounts and with desired molecular weight ranges, excellent flocculation function is found that can be used to reduce polymer consumption to obtain a desired purity of clarified waste water. It has been found that the desirable polymer blends can be effectively added upstream from locations in which polyethylene oxide would generally be added so that the polymer blend can effectively mix with the slime flow to reduce or eliminate the need for excess polymer use to compensate for less effective mixing with the slime flow. Suitable waste treatment systems are described to provide for the delivery of the flocculants in the waste treatment process.

Abstract: A process is provided for treating coolant fluid used in wire-saw cutting of semiconductor wafers and which contains silicon-containing impurities. The process comprises changing the properties of the used coolant fluid so that the silicon-containing impurities may be filtered and separated from the coolant fluid to thereby yield a coolant fluid filtrate suitable for use in a wire-saw cutting operation.

Abstract: The disclosure relates generally to the use of low molecular weight polymers to aggregate mineral components in aqueous mineral slurries to release and separate individual components of the slurry, which may then be recovered from the slurry.

Abstract: The invention provides methods and compositions for separating metals from a liquid medium, the method uses a copolymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. The treated liquid is then passed through a filtration system. The scavenging effect of the combination of the treatment with the filtration is unexpectedly greater than the sum of its parts.

Abstract: A process for dewatering oil sands tailings is provided, comprising providing a tailings feed having a solids content in the range of about 10 wt % to about 45 wt %; adding a flocculant to the tailings feed and mixing the tailings feed and flocculant to form flocs; and centrifuging the flocculated tailings feed to produce a centrate having a solids content of less than about 3 wt % and a cake having a solids content of at least about 50 wt %.

Abstract: The present invention provides useful biodegradable and environmentally friendly cost effective methods for oil recovery and reclamation from oil spills and chemical spills. More particularly, methods to recover and reclaim hydrocarbons or hydrophobic substances in an aqueous environment.

Abstract: The current invention relates to composition and method for treating impurities in a circulating water system. The circulating water system impurities may be oversprayed paint in paint spray booth applications. The composition includes an aqueous solution of a cationized starch, a polybasic aluminum salt such as aluminum chlorohydrate or polyaluminum chloride and a solution of a medium to high MW aqueous flocculent. The composition is particularly useful when added to recirculating scrubber water in paint spray booths for effectively treating both water based and solvent based paints.

Abstract: Provided is a method for treating sludge from the mining or mineral industry, including before above-ground spreading, contacting the sludge with a flocculating agent that is a water-soluble, organic polymer having a molecular weight of from 5,000,000 to 25,000,000 g/mol and an anionicity of from 10 to 40 mol %, to produce contacted sludge, wherein the water-soluble organic polymer includes at least one anionic monomer having a carboxylic function or having a sulfonic acid function, at least one non-ionic monomer, and optionally one or more cationic monomers, where the flocculating agent is branched, and has from 0.02 to 2 mol % hydrophobic monomers.

Abstract: A coagulant composition includes chitosan, methacryloyloxyethyltrimethyl ammonium methyl sulfate and a redox initiator. A coagulant, method for making the coagulant and clarifying wastewater is also provided.

Abstract: The invention concerns an online method and system for monitoring properties of an aqueous stream of an industrial process. The method comprises providing an initial aqueous stream originating from said process, the aqueous stream containing solid matter exhibiting a first settling behavior; adding modifying agent to the initial aqueous stream at an addition rate sufficient to provide a modified aqueous stream containing solid matter exhibiting a second settling behavior different from the first settling behavior; conducting a sample of the initial aqueous stream or modified aqueous stream, any combination stream comprising the modified aqueous stream or any substream of the modified aqueous stream batchwise from a sampling point to a settling vessel having a volume; and measuring the settling behavior of the solid matter in the sample locally in the settling vessel as a function of time.

Abstract: A process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidizing agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.

Abstract: The disclosure relates generally to the use of polymers to assist in aggregating mineral components in aqueous mineral slurries to release and separate individual components of the slurry, which may then be recovered from the slurry.

Abstract: Clarification of surfactant laden wastewaters of the type commonly encountered in the laundry, dishwashing, textile manufacturing, and metal cleaning and degreasing processes is provided by use of a chitosan/(meth)acrylyloxy alkyl quaternary ammonium salt graft polymer.

Abstract: A process for flocculating and dewatering oil sands fine tailings is provided, comprising: adding the oil sands fine tailings as an aqueous slurry to a stirred tank reactor; adding an effective amount of a polymeric flocculant to the stirred tank reactor containing the oil sands fine tailings and operating the reactor at an impeller tip speed for a period of time that is sufficient to form a gel-like structure; subjecting the gel-like structure to shear conditions in the stirred tank reactor for a period of time sufficient to break down the gel-like structure to form flocs and release water; and removing the flocculated oil sands fine tailings from the stirred tank reactor when the maximum yield stress of the flocculated oil sands fine tailings begins to decline but before the capillary suction time of the flocculated oil sands fine tailings begins to substantially increase from its lowest point.

Abstract: A flocculant composition that includes a blend of a first water-in-oil emulsion having a silicon-containing polymer in its aqueous phase and a second water-in-oil emulsion having an anionic polymer in its aqueous phase. The silicon-containing polymer and the anionic polymer are present in the composition at a weight ratio between 100:1 and 1:100.

Abstract: A method of rehabilitation of a deposition area to render it suitable for plant growth comprising a particulate mineral material, which particulate mineral material has been dewatered from a suspension of said material, comprising the steps of transferring the suspension of particulate mineral material as a fluid to the deposition area, and in which the suspension is allowed to stand and dewater at the deposition area to form a dewatered particulate mineral material, wherein the rehabilitation of the disposal area is achieved by adding a dewatering amount of a polymer to the suspension of the particulate mineral material while it is being transferred as a fluid to the deposition area, wherein the polymer is either a synthetic water-soluble polymer formed from one or more ethylenically unsaturated monomers having an intrinsic viscosity of at least 4 dl/g or a water-soluble polymer that is a natural polymer or semi natural polymer.

Abstract: Uses for a composition comprising a polymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. These polymers have many uses in various mediums, including wastewater systems.

Abstract: A charged particle polymer hybrid (CPPH) flocculant is taught, comprising sub-micron size charged particles and a polymer which has been polymerized in the presence of the charged particles wherein the intrinsic viscosity of the hybrid polymer flocculant is less than 930 ml/g. A method is provided for producing freely draining flocculated sediment from a suspension comprising finely divided solids in water. The method comprises dispersing, at increasing concentrations, a charged particle polymer hybrid (CPPH) flocculant into the suspension to determine a starting plateau concentration of CPPH flocculant above which concentration no further increase in the solids loading of the produced floccules is observed. Then, the concentration of dispersed CPPH flocculant in the suspension is maintained at or above the starting plateau concentration. A method is further provided for separating fine solids and water from a suspension comprising finely divided solids in water.

Abstract: The suspended solids content of a process stream in a process for digesting bauxite ore to produce alumina is reduced by contacting the stream with silicon-containing polymers.

Abstract: Microcomposites comprising titanium dioxide (TiO2) nanoparticles embedded within cross-linked, thermally responsive microgels of poly(N-isopropylacrylamide) are disclosed. Interpenetrating linear chains of poly(acrylic acid) functionalize the nanoparticles for dispersal within the microgel framework. The microcomposites show rapid sedimentation, which is useful for gravity separation applications such as environmental remediation via photocatalytic degradation. The extent of loading of the TiO2 within the colloidal particles can be easily manipulated from 10% (weight) to a value as high as 75%. The microgel-titania composites showed rapid sedimentation, which is useful for gravity separation of these particles in photocatalytic applications. The settling of the microgel-titania composites occurred over minutes and was much faster than solid, impermeable spheres.

Abstract: The invention relates to a method for processing sludge, comprising the addition of a lime-based basic agent to a sludge having a first pH value in order to raise the pH to a second value higher than the first one, adding at least one anionic organic flocculating agent that is active at said second pH value, flocculating the sludge, and separating the flocculated sludge between dehydrated sludge and a liquid phase, wherein the sludge to be dehydrated has a first above-mentioned pH value lower than 9, while the lime-based basic agent induces said pH raise to said above-mentioned second value within less than 5 minutes. The invention also relates to a composition for implementing said processing.

Abstract: Methods to control and suppress odor in papermaking sludge are described. One method involves admixing sludge from a papermaking process and cyclodextrin to provide treated sludge with the cyclodextrin present in an effective amount to control odors in the treated sludge. The deodorized sludge may be used as a component of resin-wood composite products, such as composite decking materials, walls, flooring, casting forms, and the like.

Abstract: Described is a process for treating an animal husbandry effluent slurry, such as hog manure, containing suspended solid particles. The process includes a) providing a liquid portion of the effluent, b) diluting the liquid to a Newtonian fluid, c) assuring the pH is under 10, d) adding to the fluid i) a soluble salt of alkaline earth metal (e.g. CaCl2) and ii) an insoluble basic salt of the same alkaline earth metal (e.g. CaCO3) to balance available cations and promote agglomeration of the suspended solid particles, e) adding a cationic coagulant to obtain a pre-treated destabilized colloid mixture with zero zeta potential value, and f) performing electroflotation to obtain a treated liquid and floated solids.

Abstract: The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidising agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.

Abstract: A process of dewatering an aqueous suspension comprising treating the suspension with a dewatering amount of a reverse phase polymer, and subjecting the suspension to a mechanical dewatering to form a cake, characterized in that the reverse phase polymer only partially inverts to bring about flocculation and thickening of the suspension, and then fully inverts during the further dewatering to form a cake.

Abstract: A coagulant composition includes chitosan, methacryloyloxyethyltrimethyl ammonium methyl sulfate and a redox initiator. A coagulant, method for making the coagulant and clarifying wastewater is also provided.

Abstract: Installation for flocculation of water or sludge loaded with suspended matter comprising in succession: a polymer storage hopper, a polymer grinding device, and a line, pipe or other conveyor for transferring the polymer solution to the water or the sludge to be treated. The grinder device includes a wetting cone in which the polymer is poured, and at the bottom end of the cone: a chamber for grinding and removing the dispersed polymer comprising: a rotor, a stator, and a ring fed by a secondary water circuit. A method implementing the installation is also provided.

Abstract: A method is provided for clarifying wastewater containing contaminants including soluble organic compounds and insoluble organic compounds. The wastewater is treated with a paculant admixture including a cationic coagulant polymer and powdered activated carbon. The cationic coagulant polymer is polydiallydimethylammonium chloride, poly quaternary amine, and/or a starch-based organic polymer. After an at least 2 second delay, a flocculent is added to the wastewater to achieve (i) microcoagulation of the cationic coagulant polymer with the contaminants to form coagulated particles having an effective mass and cationic charge to react with an anionic flocculent to be added thereafter, and (ii) absorption of the soluble organic compounds on the powdered activated carbon. The anionic flocculent as added and reacted with the coagulated particles to form a sludge, containing agglomerated particles including the coagulated particles and powdered activated carbon, of sufficient size for mechanical removal.

Abstract: The disclosure is directed to methods of making and using a water treatment composition for improved water infiltration during irrigation of agriculture. These methods include combining additives with an aqueous fluid to create a treated irrigation water, wherein the additives comprise a preselected amount of a surfactant and a preselected amount of a displacement ion. The improved infiltration is obtained through a constant, or substantially constant, application of the treated irrigation water to the soil during the irrigation.

Abstract: The disclosure is directed to methods of making and using a water treatment composition for improved water infiltration during irrigation of agriculture. These methods include combining additives with an aqueous fluid to create a treated irrigation water, wherein the additives comprise a preselected amount of a surfactant and a preselected amount of a displacement ion. The improved infiltration is obtained through a constant, or substantially constant, application of the treated irrigation water to the soil during the irrigation.

Abstract: The present invention relates to a process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidising agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.