112 results about "Increase ph" patented technology

A method of disposing waste includes the step of forming a primary waste pond called an Advanced Facultative Pond (AFP). A stable microbiological methane fermentation zone is established within the AFP. The system constitutes a complete primary treatment of organic waste and wastewater that does not require daily sludge handling typically associated with organic waste treatment and disposal. The method of the invention converts organic compounds, including settleable solids, into methane. The invention controls sulfide odors from methane fermentation. The invention also provides a method of filtering raw wastewater through a bed of fermenting organic solids suspended by gas evolved in a fermentation zone. Hydrogen sulfide is oxidized in accordance with the invention. The technique of the invention biologically increases pH near the pond surface, thus retaining hydrogen sulfide in solution in the pond water. The biological increasing of the pH level near the pond surface increases the rate of die-away of pathogenic bacteria. The invention transforms proteins and other organic nitrogen compounds to nitrogen gas. The invention also transforms proteins and other organic nitrogen compounds to nitrogen gas; the invention detoxifies chlorinated hydrocarbons and volatile organic compounds; the invention captures and stores gases evolved from methane fermentation; the invention removes heavy metals, while establishing meromixis in fermentation cells or zones within primary wastewater ponds.

The invention relates to xylanases and to polynucleotides encoding the xylanases. In addition, methods of designing new xylanases and methods of use thereof are also provided. The xylanases have increased activity and stability at increased pH and temperature.

The invention relates to haloalkane dehalogenases and to polynucleotides encoding alkane dehalogenases. In addition methods of designing new dehalogenases and of use thereof are also provided. The dehalogenases have increased activity and at increased pH and temperature.

The invention is directed to modified xylanases having increased stability in harsh industrial environments, such as increased pH and / or temperature.

The invention relates to xylanases and to polynucleotides encoding the xylanases. In addition, methods of designing new xylanases and methods of use thereof are also provided. The xylanases have increased activity and stability at increased pH and temperature.

The invention relates to the technical field of cutting silicon wafer post-treatment, and in particular relates to a method for cleaning a diamond wire-electrode cutting silicon wafer. The method comprises the following steps: coarsely cleaning a degummed silicon wafer in an alkaline cleaning agent and lactic acid respectively, wherein the pH of the alkaline cleaning agent is between 9 and 10, the temperature of the alkaline cleaning agent is between 30 and 50 DEG C, and the temperature of the lactic acid is 60 DEG C; and finely cleaning in the alkaline cleaning agent and purified water respectively, wherein the PH of the alkaline cleaning agent is between 9 and 10, and the temperature of the alkaline cleaning agent is between 70 and 90 DEG C. The cleaning method has the advantages that: the silicon wafer surface is cleaner and the surface damaged layer is better removed by increasing pH of the silicon wafer cleaning solution and increasing the temperature, and the cleaning solution plays a surface activation effect in the alkaline etching process of the silicon wafer. When the silicon wafer is etched, the pyramid etching surface has higher coverage rate, and the etching surface is uniform.

There is disclosed an extraction process for recovering aminoalcohols and glycols from aqueous streams of taurine production. The aqueous streams which contain aminoalcohols and / or glycols are first mixed with a base to increase pH and then extracted with C3-C6 alcohols, ketones, and ethers. The aqueous streams are then returned to their respective cyclic process for the production of taurine.

The invention provides microcapsules for the self-repairing of asphalt micro-damage and a preparation method of the microcapsules and relates to the field of building materials. The core material of the microcapsules is an asphalt regenerating agent, and the wall material of the microcapsules is melamine-urea-formaldehyde resin. The preparation method includes: adding melamine, urea and formaldehyde into deionized water, stirring, and regulating pH until the solution is clear and transparent to obtain a prepolymer solution; adding sodium dodecyl sulfate into deionized water, stirring until thesodium dodecyl sulfate is dissolved completely, adding the regenerating agent, performing high-speed shearing and emulsification to obtain a core material emulsion; adding the prepolymer solution into the core material emulsion while stirring, heating at the same time, lowering pH, performing reaction for 4 hours, and increasing pH to end the reaction; allowing a microcapsule suspension to stand,cooling to room temperature, filtering, repeatedly washing with deionized water, and drying to obtain the microcapsules. The microcapsules and the preparation method have the advantages that the microcapsules prepared by an in-situ polymerization method is good in high-temperature stability and mechanical strength and capable of effectively enhancing the self-healing ability of asphalt.

The intervertebral disc is avascular. With aging, calcified layers occlude the capillaries at the cartilaginous endplates, reducing diffusion of nutrients and oxygen from capillaries into the avascular disc. Under anaerobic condition, excessive production of lactic acid decreases intradiscal pH and irritates surrounding nerves, causing persistent back pain. Antacid is injected into the painful disc to increase pH and alleviate back pain.

The invention relates to polypeptides having glucanase, e.g., endoglucanase, mannanase, xylanase activity or a combination of these activities, and polynucleotides encoding them. In one aspect, the glucanase activity is an endoglucanase activity (e.g., endo-1,4-beta-D-glucan 4-glucano hydrolase activity) and comprises hydrolysis of 1,4-beta-D-glycosidic linkages in cellulose, cellulose derivatives (e.g., carboxy methyl cellulose and hydroxy ethyl cellulose) lichenin, beta-1,4 bonds in mixed beta-1,3 glucans, such as cereal beta-D-glucans or xyloglucans and other plant material containing cellulosic parts. In addition, methods of designing new enzymes and methods of use thereof are also provided. In alternative aspects, the new glucanases e.g., endoglucanases, mannanases, xylanases have increased activity and stability at increased pH and temperature.

Disclosed is an improved filtration system for rejecting boron from seawater. More specifically, the invention relates to a reverse osmosis (RO) system that effectively eliminates boron from seawater by increasing seawater pH prior to passage through the RO membrane. By increasing pH levels, boron removal is achieved while at the same time reducing scaling on the RO membrane.

The invention discloses a method for reducing the specific surface area BET (Brunauer Emmet Teller) of white carbon black prepared by using a sulfuric acid precipitation method. The method comprises the following steps of improving the mass concentration of sodium silicate for reaction, and / or increasing pH value during aging. Specifically, the specific surface area BET of the white carbon black prepared by adopting the sulfuric acid precipitation method can be reduced by improving the mass concentration of the sodium silicate to 20-35 percent and increasing the pH value during aging to 4-10. According to the method, not only can the specific surface area BET of the white carbon black be remarkably reduced, but also accurate control over the specific surface area BET of the white carbon black can be realized, and the requirements on the white carbon black with lower specific surface area in related fields are met. The method disclosed by the invention is simple to operate, easy to implement and suitable for large-scale industrial production.

Crushed and de-fatted oilseed is extracted with water at neutral, mildly basic or mildly acidic pH; and is filtered. The filter media allows passage of small fragments of solid cell meat into the filtrate. The filtrate is treated with a base to increase pH to over pH 9, and solids are separated out. Protein is separated from other constituents of the liquid and concentrated, for example by heat-induced or isoelectric precipitation and / or ultrafiltration. The remaining liquid is rich in sugars. The process results in one or more protein products suited for human or animal food ingredients or for production of cosmetics, a sugar rich product suitable for fermentation or use as a feed ingredient, and a fiber-protein animal feed ingredient.

The present invention is directed to a hybrid process using ion ex- change resins in the selective recovery of nickel and cobalt of leaching effluents that is comprised of the steps of processing (1 ) the laterite ore (M), which is then treated through leaching (2) (either atmospheric or under pressure), considering solutions from the solid-liquid separation step of existing plants already in operation (2) as well, in a way that the downstream process comprises an ion exchange hybrid circuit, wherein the first ion exchange step (3) with resins (Re) exhibits specific selectivity conditions for the removal of iron, aluminum and copper and an increased pH, and the second ion exchange step (4) allows the removal of nickel and cobalt.

The invention is directed to modified xylanases having increased stability in harsh industrial environments, such as increased pH and / or temperature.

It has been discovered that carbonate powders and bicarbonate powders are useful to increase the pH and corrosion resistance of high-density brines, such as zinc bromide brines, without significantly reducing their densities. The carbonates and / or bicarbonates should be water-soluble and may be sodium, potassium, magnesium and / or ammonium carbonates and / or bicarbonates and the like. The carbonates and / or bicarbonates are easily added in powder or other finely divided solid form and are completely dissolved in the brine prior to pumping the brine into a subterranean formation.

This invention discloses a stabilized biosolids composition and a method for the stabilization of biosolids. It entails the use of a chemically and biologically reactive material, in the form of ultrafine iron particles. The nanometer-sized iron particles are capable of degrading odorous organosulfur compounds, transforming persistent and toxic organic pollutants such as PCBs and chlorinated pesticides, inhibiting the growth of pathogens by increasing pH and maintaining the increased pH of the stabilized biosolids, immobilizing toxic metal ions such as mercury and lead, and improving the overall quality of biosolids for land application and plant growth.