62 results about "Ph control" patented technology

The invention relates to a recyclable easily-degradable macromolecular surfactant for cleaning oily sludge and application of the recyclable easily-degradable macromolecular surfactant. The macromolecular surfactant is prepared by taking acrylamide, methacrylic acid long-chain alkyl ester and tertiary amino substituted methacrylate as raw materials through free radical polymerization. The macromolecular surfactant is dissolved in water to prepare a cleaning solution, and oily sludge can be efficiently eluted. CO2 and N2 are sequentially introduced into the oil-containing emulsion after the oil-containing sludge is cleaned, or diluted hydrochloric acid and a diluted alkali aqueous solution are sequentially added, the hydrophilic-hydrophobic property of the macromolecular surfactant is changed through pH regulation and control, separation of the macromolecular surfactant and an oil phase is achieved, petroleum resources are recycled, and recycling of the cleaning solution containing the macromolecular surfactant is achieved. The residual macromolecular surfactant in the cleaned deoiled sludge can be degraded under the action of environmental microorganisms.

The invention provides an efficient softening and hardness-removing process for a high-hardness water body, which is applied to the technical field of water body purification. The efficient softening and hardness-removing process comprises a pretreatment mechanism, a softening reaction mechanism, a flocculent precipitation mechanism and a sludge closed-loop treatment mechanism which are sequentially connected along a water body treatment flow direction, the efficient softening and hardness-removing process for the high-hardness water body comprises the following raw water treatment steps: S1, treating raw water by virtue of the pretreatment mechanism, so as to obtain ultrafiltration effluent; and S2, the ultrafiltration effluent enters the softening reaction mechanism, and under the control of the electric cabinet control mechanism, chemicals are added for softening and flocculation reaction. The total hardness removal rate can reach more than 90% through accurate addition of the medicament, two-stage pH control and optimization of reaction conditions, which is far superior to that of a traditional resin ion exchange method, the influence of high-hardness water discharge on receiving water is reduced, ecological and health problems caused by excessive hardness of the water are avoided, and the harsh requirements of industrial production and environmental protection on soft water are met.

This invention relates to the fields of bioengineering and fermentation engineering, and discloses a genetically engineered *Streptomyces albopictus* strain that produces high levels of ε-polylysine and its fermentation production process. This genetically engineered strain uses *Streptomyces albopictus* strains acclimated to ε-polylysine tolerance as a chassis, and its genome integrates... ppc and dapf Through expression box, heterogeneous asd Expression cassettes, containing secretory signal peptides lysp Fusion expression cassettes and D404A / K499A point mutations pls Expression cassette. The fermentation process employs a two-stage pH control strategy, maintaining a neutral environment during the cell growth phase and adjusting to an acidic environment during product synthesis. This invention improves ε-polylysine yield through a synergistic strategy of enhancing precursor supply, constructing efflux detoxification channels, and increasing synthase activity; combined with an acidic fermentation process, it effectively inhibits product degradation, yielding a high-molecular-weight and highly uniform target product suitable for industrial production.

This application discloses a method and its application for preparing collagen peptides by stepwise enzymatic hydrolysis with dynamic pH control, belonging to the field of protein preparation technology. The method includes raw material pretreatment, stepwise enzymatic hydrolysis with dynamic pH control, and post-treatment to obtain collagen peptide products with a molecular weight distribution of 800-2000 Da. The obtained products can be used to prepare products with bone growth promotion functions. This application employs a combined process of stepwise enzymatic hydrolysis with dynamic pH control, alkali-thermal coupling pretreatment, and 2000 Da retention. The steps work synergistically: alkali-thermal treatment exposes enzyme cleavage sites, dynamic pH control enables efficient enzymatic hydrolysis, and 2000 Da retention of active components results in a significantly higher yield and content of collagen peptides compared to conventional processes. Animal experiments have demonstrated that the collagen peptides have bone growth promotion activity, and the mechanism of action has been revealed at the IGF-1 signaling pathway level.

The present invention relates to an eco-friendly soil conditioner and a method for manufacturing same and, more specifically, to: an eco-friendly soil conditioner which increases moisture retention ability in soil and, at the same time, enables soil aggregation, pH control, nutrient supply, incorporation of microorganisms, and the like, thereby being capable of creating optimal vegetation conditions and also increasing bio-carbon content through biodegradation, thus being able to reduce global warming; and a method for manufacturing same.

The invention belongs to the technical field of industrial automation control, and relates to a DCS automatic control system and method applied to a reaction kettle, and the system comprises a data collection module, an execution module, a human-computer interaction interface, and a control module. The control module is in communication connection with the data acquisition module, the execution module and the human-computer interaction interface so as to realize transmission of signal and data information, preset graded temperature control logic (multiple preset temperature control programs), pH control logic and seasonal mode selection logic are stored in the control module, and according to the deviation value of the measured temperature and the set temperature in the reaction kettle, the temperature of the reaction kettle is controlled to be adjusted. And the control module controls the execution module to execute actions to complete graded temperature control. According to the invention, the problems of low precision, slow response and single function of a traditional reaction kettle temperature control system are solved, intelligent and integrated cooperative control of multiple parameters such as temperature, pH, flow, liquid level and the like is realized, and the automation level, the product quality stability and the energy utilization efficiency of the production process are remarkably improved.

The invention provides a method and a system for accurately controlling the pH value of single-tank outlet light salt brine in multiple groups of electrolytic tanks, comprising multiple groups of electrolytic tanks, a tank inlet brine branch pipe is connected with a diluted hydrochloric acid branch pipe, the diluted hydrochloric acid branch pipe is provided with a diluted hydrochloric acid flowmeter and a diluted hydrochloric acid regulating valve, and the tank outlet light salt brine branch pipe is connected with a light salt brine sampling branch pipe. Each light salt brine sampling branch pipe is provided with a light salt brine sampling program control valve and a simulation assignment module, the light salt brine sampling branch pipes are connected with a light salt brine sampling header pipe, and the light salt brine sampling header pipe is provided with a sampling adjusting valve, a sampling flow meter and a pH meter; the diluted hydrochloric acid flow meter, the diluted hydrochloric acid adjusting valve, the light salt brine sampling program control valve, the sampling adjusting valve, the sampling flow meter and the pH meter are all connected into a DCS system, and the diluted hydrochloric acid adjusting valve adjusts the opening degree according to the detection value of the pH meter. Precise adjustment and control of pH of light salt brine discharged from each single cell in multiple groups of electrolytic cells are realized through a pH meter and a control loop thereof, the anode efficiency and the quality of a liquid caustic soda product are improved, and the production stability is improved.

The utility model relates to the technical field of wastewater treatment, in particular to a pH regulating and controlling device for beverage wastewater treatment, which comprises a treatment barrel, a stirring device, an acidity regulating device and an alkalinity regulating device, a solid pH sensor is mounted on the inner side wall of the treatment barrel, and a control system is mounted on the side wall of the front end of the treatment barrel. An acidity adjusting device is mounted at one end of the treatment barrel, an alkalinity adjusting device is mounted at the other end of the treatment barrel, the stirring device is mounted in the treatment barrel, and a stirring shaft drives stirring blades to rotate and stir, so that circulation of wastewater in the treatment barrel is promoted, and a regulator is prevented from settling; according to the invention, the solid pH sensor is arranged in the container, the liquid in the whole container is uniformly stirred, the regulator and the wastewater are efficiently mixed, in the whole treatment process, the solid pH sensor continuously monitors the pH value change of the wastewater, and the control system dynamically adjusts the input amount of the pH regulator according to real-time data until a preset target pH range is reached.

This invention discloses a selenium-enriched dairy product from selenium-enriched dairy cows and its preparation method, comprising the following components and process characteristics: Basic milk matrix: by mass percentage, containing 85-95% raw milk or reconstituted milk, 0.5-2% milk protein concentrate, and 0.1-0.5% fructooligosaccharides; Probiotic-polyphenol complex: composed of *Lactobacillus plantarum* LP-33 (preservation number CGMCC No. 24567) and grape seed polyphenols, wherein the polyphenols are compounded in a 1:1 ratio with zein-chitosan bilayer microencapsulated form in a free state, with a total addition amount of 50-100 mg / L; Dynamic pH control system: during fermentation, the pH value is monitored in real time and a 0.1-0.5 mol / L sodium bicarbonate buffer solution is automatically added to maintain the pH at 5.0-5.5. This invention achieves breakthroughs in viable count and acid resistance; through dynamic pH control and synergistic protection by polyphenols, the viable count of the finished product is ≥1×10⁻⁶. 9 With a CFU / mL concentration, the survival rate of probiotics in simulated gastric juice for 2 hours is >80%, solving the problem of "high output but low intake" of probiotics in traditional fermentation.

This invention relates to the field of inorganic fine chemical material preparation technology, and discloses a method for preparing high-purity ultrafine calcium fluoride based on dynamic pH-controlled gradient crystallization. The method uses industrial-grade calcium carbonate and fluorosilicic acid as raw materials. Its core is based on dynamic pH gradient control of the reaction mechanism, precisely dividing the calcium fluoride crystallization process into three stages: primary nucleation, secondary growth, and tertiary purification. Through the coordinated matching of parameters such as pH, temperature, and stirring rate at each stage, complete separation and control of nucleation and growth are achieved, ultimately producing high-purity ultrafine calcium fluoride powder with a purity ≥99.9% and a particle size of 1–5 μm. This invention features low raw material costs, strong process controllability, and the main byproducts are CO2 and silicic acid, both of which can be recycled. No fluoride-containing wastewater is discharged during the process, achieving clean production. Furthermore, the process has high stability and is suitable for large-scale industrial production, offering significant economic and environmental benefits.

Microbeads capable of controlling the pH of a sample are provided. The microbeads can control the pH of a sample to be equal, similar or close to a target pH without an automated device and the like such as an additional valve system for controlling pH, and thus could be readily applied to fields requiring pH control.

A pool system includes a water sensing device. The water sensing device may locally control a pH of a sensing region of the water sensing device including water of a pool or spa. Additionally, or alternatively, the water sensing device may electrochemically sense free chlorine in the sensing region after locally controlling the pH of the sensing region.

The present invention provides a carbon dioxide capture system with pH control functionality, allowing electrolyte recirculation.

This invention relates to the field of food fermentation technology, specifically to a high-efficiency fermentation process for purple sweet potato rice wine. It aims to solve the technical problems of significant anthocyanin degradation and fading, difficulty in balancing flavor and efficiency, poor strain adaptability, and short shelf life during the fermentation of purple sweet potato rice wine. This invention improves product quality and fermentation efficiency by constructing a specialized compound fermenting agent and employing a two-stage fermentation process with dynamic pH control. The compound fermenting agent consists of *Rhizopus oryzae*, *Monascus purpureus*, *Kluyveromyces martensii*, and *Lactobacillus plantarum*. The fermentation process employs two stages: the first stage is aerobic fermentation, which promotes the stable existence of anthocyanins and facilitates enzyme activity; the second stage is anaerobic fermentation, which further stabilizes the color and inhibits unwanted microorganisms. This invention uses ultra-high pressure sterilization combined with post-treatment with natural antioxidants to sterilize and preserve the purple sweet potato rice wine, which can improve the pigment retention rate and significantly extend the shelf life of the purple sweet potato rice wine.

The invention relates to saccharomycetes as well as a domestication method and application thereof, and belongs to the technical field of microorganisms. The saccharomycetes are Pichia kudriavzevii HT13, and are preserved in the Guangdong Microbial Culture Collection Center on August 15, 2025, and the preservation number of the saccharomycetes is GDMCC No: 66848. According to the method for domesticating the acid-resistant yeast strain, the acid-resistant yeast with good substrate conversion performance is obtained, the performance is stable, the adaptability in the industrial production environment is good, the fermentation level under pH regulation can still be achieved without pH control, the production cost is low, and the method has wide industrial application prospects.

The application relates to the technical field of process control, in particular to a pH dynamic regulation method and system in a plant calcium extraction process, which comprises the following steps: constructing a pH-temperature and calcium dissolution rate lookup table model; based on the model, a multi-stage optimal control problem with the minimum total time as the target is established, and a dynamic programming algorithm is used for solving, so that continuous optimal pH and temperature control trajectories are generated; a compound controller combining feedforward and feedback is designed to accurately track the trajectories; an online trajectory correction mechanism is established, when it is monitored in real time that the process state seriously deviates from the expectation, the re-planning can be automatically triggered, the control strategy is dynamically adjusted and updated. The application deeply integrates process modeling, optimal control and adaptive adjustment, realizes dynamic optimization and closed-loop control of the whole cycle of the plant calcium extraction process, significantly shortens the extraction time, and improves the extraction rate of calcium and the stability of the quality of the final product.

This invention belongs to the field of bio-fermentation technology and discloses a method for improving glutamic acid fermentation by using liquid alkali in conjunction with liquid ammonia to regulate pH. The method includes the following steps: when glutamic acid fermentation has reached 6, 7, or 8 hours, pH is adjusted using a combined liquid alkali and liquid ammonia feedstock to control the pH at approximately 7.0 until fermentation is complete. This invention, by employing a liquid ammonia-liquid alkali synergistic regulation strategy in the early stages of fermentation, effectively balances the relationship between nitrogen supply and pH control, thereby improving the level of glutamic acid fermentation.

This invention relates to an automatic alkali addition system for coking wastewater, comprising an alkali storage tank, a conveying unit, a pipeline unit, a detection unit, and a control unit; and an automatic alkali addition method for coking wastewater, comprising the following steps: 1) setting a target pH value according to the ammonia nitrogen compliance requirements of the coking wastewater; 2) collecting the measured pH value at the outlet of the ammonia stripping tower wastewater in real time and transmitting it to the control unit in real time; 3) the control unit, based on the measured pH value and the target pH value, using a PID algorithm, obtaining a control signal for adjusting the stroke or frequency of the alkali metering pump; 4) the conveying unit, based on the control signal obtained in step 3), adjusting the alkali dosage in real time; 5) the control unit continuously collecting the measured pH value and repeating steps 2) to 4), dynamically correcting the alkali dosage in real time, which can effectively achieve unblocked continuous operation of the pipeline, precise pH control, while reducing alkali consumption and maintenance costs.

Lactic acid is prepared by fermenting a carbohydrate source in the presence of a calcium hydroxide-based pH control agent that comprises from about 0.1 to about 10 wt % silica to form a fermentation broth comprising lactic acid and calcium lactate. The fermentation broth is processed by a sequence of hydrocyclones to remove silica from the feed streams to avoid fouling of equipment and to avoid damage to filtration or centrifugation equipment. The biomass component of the fermentation broth is separated out prior to acidulation of the fermentation broth, and therefore itself is a viable product for use since it can be provided without filter aid components that were previously required when the biomass was removed during acidulation. Gypsum is recovered after the acidulation step, and can be available as a product by itself, or combined with the biomass as a mixed product.

This invention provides an online pH control device for industrial fluids, characterized by comprising a pH adjustment agent dispensing unit and a pH detection unit. The pH adjustment agent dispensing unit dispenses a pH adjustment agent into the fluid tank. The pH detection unit comprises a pH detection chamber, a pH detection device, and a liquid collection device. One end of the liquid collection device is inserted into the liquid phase of the fluid tank, and the other end is connected to the pH detection chamber to input a liquid sample from the fluid tank into the pH detection chamber. The pH detection device is installed in the pH detection chamber to detect the input liquid sample. This device features high sensitivity, a compact structure, and small size, making it more convenient to operate and suitable for intelligent liquid storage management scenarios in fields such as machining, pharmaceuticals, environmental protection, and energy.

The present invention relates to a constructing method for delaying corrosion of radioactive waste disposal container in concrete disposal vault and, more specifically, to a constructing method for delaying corrosion of radioactive waste disposal container in concrete disposal vault in which backfill, placed to the top, combines pH control capsules, thereby dissolving the pH control capsules in rainwater, and a pH controller, inside, is discharged, thereby preventing decrease of pH of the backfill below 8.5 and delaying corrosion in the disposal containers, upon filling in backfill after placing radioactive waste disposal containers in the concrete vault.

Provided herein are secretory compositions / cocktails derived from a novel, extremophilic fungal species cultured, isolated, and characterized herein. Said novel, extremophilic fungal species may be exploited to produce secretory compositions / cocktails which comprise a unique mixture of thermo-tolerant, stable enzymes capable of digesting cellular and genetic material in its surroundings under extreme temperatures. Such secretory compositions / cocktails may be useful as cleaning and sterilization solutions against biofilm, urine, yeast, bacterial, or viral contamination. Other uses include, but are not limited to, urea removal, fertilizer wastewaters, wastewater reclamation for life support systems in space, pH control, source of ammonia and carbon dioxide, starch digestion, biofuel production, as pharmaceuticals, and medical treatments such as wounds, skin disorders, or nail disorders.

This invention discloses a method and apparatus for dynamic pH control of autoclaved aerated concrete (AAC) blocks. The method includes: collecting data on the pH value of the gasified fly ash slurry after preparation and the amount of raw materials added, and inputting this data into a backpropagation neural network prediction model to output predicted values; comparing the predicted values ​​with a pre-set target range, and if the predicted values ​​exceed the target range, calculating the required dosage of alkaline reagent and performing reagent addition at one or more control nodes; collecting the actual pH value and product compressive strength after pouring, comparing them with the predicted values ​​to obtain error results, and triggering online incremental updates of the backpropagation neural network prediction model when the error results exceed a set threshold. The apparatus includes: an online pH monitoring unit, a weighing and metering unit, a data acquisition and transmission unit, an intelligent control unit, and a reagent addition unit. This invention achieves pre-pouring prediction and multi-node collaborative control, stabilizing the slurry pH value within the target range.

The invention discloses a fermentation culture medium for improving the fermentation production stability of arginine and a culture process. In the fermentation culture medium, the molasses dosage is reduced, so that the raw material cost and the component fluctuation risk can be reduced; the yeast extract powder and the molasses have a synergistic effect, so that various amino acids and vitamins can be quickly utilized for thallus growth, the negative effect of fluctuation of nutritional ingredients of the molasses is counteracted, and the sugar-acid conversion rate is increased. In the culture process, through two-stage pH control, the thallus growth and product synthesis environment can be optimized, and the process stability is improved; through linkage regulation and control of dissolved oxygen and material supplementation, sudden drop of dissolved oxygen caused by excessive accumulation of substrates can be avoided, energy consumption is reduced, and process control precision is improved; the method is suitable for fermentation systems of different scales and facilitates industrial application.

The invention discloses a resin optimal configuration and pH stable control method for a generator stator cooling water system. The method comprises the following steps: step 1, determining a resin configuration scheme; step 2, designing a resin bed layer structure; step 3, setting pH control parameters; by optimizing resin configuration and a pH control strategy, accurate and stable control of the water quality of the generator stator cooling water system is realized, and by adopting a specific anion and cation resin ratio and a layered filling mode, the ion exchange efficiency is remarkably improved, and the service life of the resin is remarkably prolonged. And through multi-parameter cooperative control and a dynamic regulation mechanism, pH value fluctuation is effectively inhibited, and system corrosion and scaling risks are avoided. The method is easy and convenient to operate, high in automation degree and capable of meeting the water quality control requirements under different working conditions, and reliable guarantee is provided for safe and stable operation of the generator.

This invention discloses a segmented isoelectric extraction method for glutamic acid based on gradient pH control, belonging to the field of glutamic acid extraction technology. It aims to solve problems such as impurity encapsulation in crystals, low purity, difficulty in solid-liquid separation, and poor process stability caused by one-time pH adjustment in traditional isoelectric glutamic acid extraction processes. This method divides the crystallization process into three stages: rapid nucleation, slow crystal growth, and stable crystal growth. Through the synergistic effect of gradient pH control and segmented temperature control: In the first stage, the pH of the fermentation broth is adjusted from the initial pH to 4.2-4.6 at a uniform rate, while the temperature of the fermentation broth is lowered to 20°C within 2 hours; in the second stage, the pH is uniformly lowered to 3.6-3.8, and the temperature is uniformly lowered to 15°C; in the third stage, the pH is uniformly lowered to 3.3, and the temperature is uniformly lowered to 10-12°C. This invention avoids the problems of fine crystal loss and impurity co-crystallization, and the process is stable and easily controlled, increasing the purity of glutamic acid from 95.00% in traditional processes to approximately 98.25%, significantly improving the quality and production efficiency of glutamic acid.

The present technology relates generally to metalworking fluid compositions including a compound of Formula (I) where R1, R2, R3, and R4 are each independently H or Ci-Ce unsubstituted alkyl; provided at least one of R1, R2, R3, and R4 is not H; and provided that the compound has 4, 5, 6, 7, 8, 9, or 10 carbon atoms. For example, including a compound of Formula I in a metalworking fluid having a pH of at least about 7 may enhance the metalworking fluid's lubricating, cleaning, and / or handling properties by providing multi-metal corrosion inhibition, maintaining pH control, and / or stabilizing the metalworking fluid. When including a biocide, it may act synergistically with the biocide to inhibit microbial growth and disrupt existing biofilms, resulting in extended metalworking fluid life, reduced equipment wear, consistent part quality, and lower environmental load from fluid disposal.

This invention discloses a suspendable micronized wax and its coating prepared based on the double-layer compression theory. First, a composite modified double-layer compression agent micronized powder T is obtained by composite modification and pH control of an inorganic double-layer compression agent. Then, a modified micronized wax is obtained by negatively charging the surface of the micronized wax. The two are then blended to obtain a suspendable modified micronized wax. After solvation pretreatment, it is added to a coating system to prepare a special coating that achieves a suspension effect. Furthermore, the suspended wax in this special coating can be redispersed after slight vibration, perfectly solving the floating / sinking phenomenon of wax powder components due to insufficient suspension stability under long-term static conditions in the coating production line's storage tank. This improves the stability of the roller coating process and the appearance quality of the coating film, and has significant industrial application value.

Disclosed is a system for the production of urea ammonium nitrate (UAN), which is particularly suitable for processing relatively small ammonium nitrate waste streams into UAN. The system comprises a concentration for ammonium nitrate, a treatment section which allows recovering and recirculating nitrogen compounds entrained in vapor from the concentration section, and a pH control section allowing to adjust the pH of the processed ammonium nitrate waste stream to the extent necessary.