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39 results about "High phosphorus" patented technology

High levels of phosphorus in the blood may be a sign of advancing cancer in some patients. Symptoms of hypothyroidism, a cause of high phosphorus in the blood, may include stomach cramps. Hypothyroidism is a common cause of high phosphorus in the blood.

Electrochemical-assisted high-phosphorus-removal sewage treatment device and treatment method

The invention relates to an electrochemistry-assisted high-phosphorus-removal sewage treatment device and a treatment method, the electrochemistry-assisted high-phosphorus-removal sewage treatment device is provided with a biochemical pool, a secondary sedimentation pool located behind the biochemical pool, an electrochemical pool located behind the secondary sedimentation pool and a final sedimentation pool located behind the electrochemical pool, the electrochemical pool is internally provided with an electrode assembly, the electrode assembly releases iron ions after being electrified, and the biochemical pool adopts an A2O process; comprising an anaerobic tank, an anoxic tank and an aerobic tank which are sequentially connected, both the aerobic tank and the electrochemical tank are provided with aerators, the final sedimentation tank is provided with an active liquid backflow pipeline, and clarified liquid in the final sedimentation tank flows back to the anaerobic tank and the anoxic tank so as to form and maintain the concentration of iron ions in the biochemical tank. The method is suitable for automatic operation, is beneficial to reduction of manpower and material resources, reduction of medicament input and a new treatment process technology for enabling the sewage quality to reach the standard, can efficiently utilize iron ions released by the electrode through cooperation of a plurality of treatment procedures, can consider main control indexes of total phosphorus, ammonia nitrogen, total nitrogen, COD and the like, and realizes efficient nitrogen and phosphorus removal.
Owner:BEIJING HEHAIQINGYUAN ENVIRONMENTAL PROTECTION SCI & TECH CO LTD +1

High phosphorus-containing organic waste liquid incineration treatment furnace

The application belongs to the technical field of waste liquid treatment, and particularly relates to a high-phosphorus organic waste liquid incineration treatment furnace, which comprises a collecting box, a top of the collecting box is connected with an incineration furnace, a first ash plate is fixedly arranged in the incineration furnace, an igniter is arranged on the first ash plate, a smoke exhaust pipe is arranged on the top of the incineration furnace in communication, and an annular spray pipe is arranged on the outer wall of the incineration furnace in communication. Through integrated design, efficient incineration treatment of waste liquid is realized, uniform mixing of waste liquid and combustible material is ensured, the combustion efficiency is improved, the impurity treatment is more convenient through the mixing treatment of impurities and water, the cleaning of the ash plate is automatically realized, and the environmental protection and efficiency of waste liquid treatment are improved as a whole.
Owner:JIANGSU RUIDING ENVIRONMENTAL ENG CO LTD

Composite phosphorus locking agent for water body and preparation method of composite phosphorus locking agent

The invention discloses a water body composite phosphorus locking agent and a preparation method thereof, and belongs to the technical field of water quality treatment. The composite phosphorus locking agent for the water body comprises the following raw material components in parts by weight: 0.5-1.5 parts by mass of modified zirconium hydroxide, 4 parts by mass of sodium alginate, 2.3-2.5 parts by mass of a composite organic material, 6 parts by mass of calcium chloride and 1-3 parts by mass of ferric trichloride, the modified zirconium hydroxide is obtained by modifying zirconium hydroxide with epoxy chloropropane; the composite organic material is prepared from diethanol amine and chitosan; the water body composite phosphorus locking agent prepared by the method is relatively high in phosphorus removal rate.
Owner:CHINESE ACAD OF ENVIRONMENTAL PLANNING

Phosphorus removal agent and preparation method thereof

The application belongs to the technical field of sewage treatment, and particularly discloses a phosphorus removal agent and a preparation method thereof. The phosphorus removal agent comprises the following components in parts by weight: 7-9 parts of a bio-based adsorbent and 2-5 parts of modified sepiolite. The bio-based adsorbent and the modified sepiolite are compounded to prepare the phosphorus removal agent. Experimental results show that the combination of the two has the advantages of large adsorption capacity and high phosphorus removal rate.
Owner:DALIAN ECONOMY & TECH DEV ZONE LIJIA CHEM PRODS

Modified polyaluminum chloride with high phosphorus removal performance as well as preparation method and application of modified polyaluminum chloride

The invention provides modified polyaluminum chloride with high phosphorus removal performance and a preparation method and application thereof, and belongs to the technical field of modified polyaluminum chloride. The preparation method comprises the following steps: firstly, reacting aluminum chloride, zirconium oxychloride and an alkaline regulator in a water phase to prepare an aluminum-zirconium complex mother solution, then adding a polyhexamethylene biguanide solution into the aluminum-zirconium complex mother solution, and realizing effective compounding of organic long-chain molecules and inorganic complexes under the actions of static electricity, coordination, hydrogen bonds and the like; finally, mannitol serving as a polyhydric alcohol stabilizer is introduced into the organic-inorganic composite system, and premature polymerization and precipitation of the product are inhibited by means of the chelation of mannitol on a metal center and the steric hindrance effect of mannitol on molecules; according to the invention, the complexation of zirconium ions and strong current neutralization of polyhexamethylene biguanide form synergy, the removal efficiency of phosphate is improved, the formed flocculating constituent is more compact and has high settling velocity, and the application range of the product under complex water quality conditions is widened.
Owner:SHANGHAI GAOQIAO DATONG WATER PURIFICATION MATERIAL CO LTD

A high phosphorus-containing anti-gas-explosion vortex incinerator and a use method thereof

The application discloses a high-phosphorus anti-gas-explosion vortex incinerator, which comprises a screening box, a pulverizer is fixedly connected to the outer wall of the screening box, three inverted hoppers are formed in the inner side of the screening box, a screening assembly is arranged in the inner side of the screening box, a screening plate is arranged at the screening end of the screening assembly, through holes are simultaneously formed in the inner side of the screening box, a dust filtering and cleaning assembly is arranged in the through hole, second auger blades are arranged at the cleaning end of the dust filtering and cleaning assembly, an auger conveying assembly is arranged at the bottom end of the inverted hopper, and an incinerator assembly is arranged at the discharging end of the auger conveying assembly.
Owner:JIANGSU RUIDING ENVIRONMENTAL ENG CO LTD

A medium-low carbon high-phosphorus weather-resistant cold heading steel satisfying cold heading large deformation and a preparation method thereof

The application provides a kind of low carbon high phosphorus weathering cold upsetting steel satisfying cold upsetting large deformation and preparation method, belongs to steel preparation field.The chemical composition of the cold upsetting steel includes:C:0.15%~0.25%, Si:0.20%~0.30%, Mn:0.30%~0.40%, Cu:0.20%~0.60%, P:0.08%~0.14%, S≤0.01%, Ni:0.10%~0.15%, Cr:0.20%~0.50%, Al T :0.025%~0.06%; wherein, C and P satisfy the following relationship: [P]*[C]≤0.035.Rationally design the chemical composition of cold upsetting steel, inhibit pitting by proper high phosphorus content and Cu, Ni element cooperation, form passivation film, satisfy the corrosion performance of the atmospheric environment characteristics of strong radiation, high SO2 concentration.At the same time, control C and P satisfy the relationship, avoid the problem of phosphorus segregation, grain boundary embrittlement, so as to satisfy the requirement of cold upsetting one-time forming limit quantity>80%.
Owner:SHOUGANG GROUP CO LTD

A lanthanum-based composite phosphorus removal material and its preparation and removal methods

ActiveCN121338720BPhosphateLanthanum nitrate
This invention relates to a lanthanum-based composite phosphorus removal material and its preparation and removal methods, belonging to the field of water treatment. It solves at least one of the following problems existing in lanthanum-based phosphorus removal materials: the difficulty in balancing high adsorption capacity and structural stability, the difficulty in balancing excellent adsorption performance and simple preparation processes, and the difficulty in synergistically achieving high phosphorus removal efficiency and easy material recycling and regeneration. A method for preparing a lanthanum-based composite phosphorus removal material, using lanthanum nitrate hexahydrate and citric acid as the lanthanum source and carbon source respectively, includes the following steps: co-dissolving lanthanum nitrate hexahydrate and citric acid in water; stirring and mixing under heating conditions until a viscous liquid is formed; calcining the viscous liquid; and grinding the calcined product. This invention achieves high adsorption capacity, high selectivity, and rapid adsorption of phosphates in water, with stable structure, reduced production costs and process complexity, and excellent recycling and regeneration capabilities.
Owner:BAOTOU RESEARCH INSTITUTE OF RARE EARTHS

Integral phosphorus removal adsorbent based on fibrous inorganic mineral material as well as preparation and application of integral phosphorus removal adsorbent

The invention discloses an integral phosphorus removal adsorbent based on a fibrous inorganic mineral material, a preparation method of the integral phosphorus removal adsorbent and application of the integral phosphorus removal adsorbent to removal of phosphorus in an aqueous solution. According to the invention, a fibrous inorganic mineral material with the size of more than centimeter level is used as a carrier, a non-noble metal salt is used as a precursor, non-noble metal hydroxide is formed through in-situ deposition, and the non-noble metal hydroxide is uniformly attached to the surface of the fibrous inorganic mineral material, so that the integral phosphorus removal adsorbent is directly obtained without further molding. The preparation process is simple, the material source is wide, the cost is low, and large-scale preparation is easy. The obtained adsorbing material can effectively remove trace phosphorus in water, has high phosphorus removal capacity and rapid adsorption kinetics, can realize an excellent treatment effect in a wide concentration and pH range, and can be recycled.
Owner:ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT +1

MBR process with high membrane flux and high phosphorus removal efficiency

The present application relates to sewage treatment technical field, disclose a kind of MBR process with high membrane flux and high-efficiency phosphorus removal, the MBR process is between aerobic zone and MBR membrane pool Setting flow guide area and sedimentation area;Flow guide area and aerobic zone between being equipped with flow guide wall flow guide wall being equipped with flow guide hole, flow guide area and sedimentation area between being equipped with partition wall, water inlet being opened in the upper portion of partition wall, the sewage of flow guide area is buffered to the aerobic zone into sedimentation area;Sedimentation area and MBR membrane pool between being equipped with triangular weir plate, the sewage before entering MBR membrane pool is treated by sedimentation in sedimentation area, to reduce the membrane pollution speed, extend the service life of membrane group device.The MBR process with high membrane flux and high-efficiency phosphorus removal is mainly to the postpositioned anoxic section of biochemical reaction tank is reformed, without new building, by increasing some equipment and to postpositioned anoxic section local reformation can be realized, save operating cost, reduce the membrane pollution speed, extend the service life of membrane group device.
Owner:KUNMING DIANCHI WATER TREATMENT CO LTD

A flash treatment system and method for high phosphorus oolitic hematite ores

The application belongs to the technical field of metallurgy, and particularly relates to a flash treatment system and method for high-phosphorus oolitic hematite ore; wherein the flash treatment system for high-phosphorus oolitic hematite ore comprises a feeding device, a reaction chamber, a collecting device and a magnetic separation device; the inner wall of the core reduction zone of the reaction chamber is provided with a composite ceramic working layer, which is prepared through a sectional hot-pressing sintering process and has high density, high hardness and excellent thermal shock resistance; in the treatment process, the high-phosphorus oolitic hematite ore and a dephosphorization aid are jointly ball milled and dried, then sprayed into a carrier gas, and flash reduction is carried out in the core reduction zone with hydrogen as a reducing agent; the reduced product is separated by magnetic separation to obtain metallic iron powder and tailings, realizing efficient dephosphorization and rapid reduction of the high-phosphorus oolitic hematite ore, and having the advantages of short process flow, short reduction time, high dephosphorization rate and clean environment.
Owner:JIANGXI UNIV OF SCI & TECH

A process for plating thick nickel with no burr and high phosphorus

The present application relates to a kind of processes for thickening nickel plating of high phosphorus without burr, specifically comprising metal substrate pretreatment, plating solution preparation, plating solution post-treatment and electroless nickel plating steps. The plating solution composed of sodium phosphate dibasic, nickel sulfate, sodium hypophosphite, sodium fluoride, sodium citrate, propionic acid, bismuth nitrate, chelidamic acid, copper sulfate and sodium dodecyl sulfate is used for electroless nickel plating after compounding with composite stabilizer C. Composite stabilizer C is compounded by stabilizer A and stabilizer B according to a volume ratio of 2:1, wherein stabilizer A is composed of sodium thiosulfate and potassium iodate, and stabilizer B is composed of sodium dodecyl sulfate and ammonium molybdate. The present application overcomes the generation of burr while ensuring the thickening of the coating, and the coating is uniform, low cost, environmentally friendly and durable. The utilization rate of nickel in the plating solution is high, and the service life of the plated part is long.
Owner:NANCHANG HANGKONG UNIVERSITY

Calcium oxide-iron composite agent for treating phosphorus and fluorine wastewater based on synergistic effect, and preparation method and application thereof

The application discloses a kind of calcium oxide-iron composite reagent based on synergistic treatment of phosphorus fluorine wastewater and its preparation method and application, belong to phosphorus fluorine pollution remediation technical field.The calcium oxide-iron composite reagent disclosed in the application uses dispersing agent, calcium oxide combined with iron powder as preparation raw material, calcium oxide will react with phosphate and fluoride ion in wastewater, generate substance insoluble in water, finally removed in the form of precipitate;Iron powder will remove the phosphate and fluoride in wastewater in the form of adsorption, precipitation, coprecipitation;Iron powder and calcium oxide in mixed solution can remove phosphorus fluorine by synergistic effect after compounding;The calcium oxide-iron composite reagent of the application shows excellent removal effect to low phosphorus fluorine and high phosphorus fluorine wastewater, so that the calcium oxide-iron composite reagent has wider use prospect in the treatment of water pollution.
Owner:WENGFU (GRP) CO LTD +1

Method for preparing magnetic targeted phosphorus removal material through red mud in-situ crystallization and application of magnetic targeted phosphorus removal material

The invention belongs to the technical field of red mud solid waste utilization, and particularly discloses a method for preparing a magnetic targeted phosphorus removal material through red mud in-situ crystallization and application of the magnetic targeted phosphorus removal material. The phosphorus removal material provided by the invention is prepared from the following raw materials in parts by mass: 85 to 95 parts of red mud, 10 to 20 parts of water and 1 to 4 parts of glucose. The phosphorus removal material has a composite structure of Fe3O4 magnetic core + Al (OH) 3 adsorption layer + SiO2 skeleton, has high phosphorus removal capacity and high magnetic saturation intensity, can still obtain better phosphorus removal performance after adsorption saturation through simple regeneration treatment, can be repeatedly used for 5-8 times at most, and greatly reduces the operation cost. The invention also provides a preparation method and application of the phosphorus removal material, the preparation process does not need high-temperature roasting, does not need additional addition of a magnetic reagent and an acid-base modifier, only utilizes the strong basicity of the red mud and iron and aluminum components, and takes glucose as a mild reducing agent to generate a composite structure of a magnetic core and a phosphorus removal adsorption layer in situ.
Owner:CHINA MINMETALS CHANGSHA MINING RES INST

A high-efficiency denitrification biological phosphorus removal method applied to sewage treatment

PendingCN122627564AElectrolysisSewage
The application discloses a kind of denitrification biological high-efficiency phosphorus removal methods applied to sewage treatment, comprising the following steps: S1: sewage pretreatment;S2: anaerobic denitrification phosphorus removal;S3: enhanced denitrification phosphorus removal;S4: aerobic treatment;S5: sedimentation separation.The application combines biological treatment with electrolytic technology to form a new mechanism of physical-chemical-biological synergistic phosphorus removal, the iron ions generated by electrolysis and the biological phosphorus removal process promote each other, not only improves the phosphorus removal efficiency, but also reduces the use of chemical agents, reduces the risk of secondary pollution, fully plays the characteristics of denitrifying phosphorus accumulating organisms, realizes the efficient removal of phosphorus pollutants, overcomes the problems of high phosphorus removal cost, easy secondary pollution, greatly affected by water quality and quantity in the prior art, realizes efficient, low-cost, stable phosphorus removal effect.
Owner:YANGTZE ECOLOGY & ENVIRONMENT CO LTD

A flash treatment system and method for high phosphorus oolitic hematite ores

The application belongs to the technical field of metallurgy, and particularly relates to a flash treatment system and method for high-phosphorus oolitic hematite ore; wherein the flash treatment system for high-phosphorus oolitic hematite ore comprises a feeding device, a reaction chamber, a collecting device and a magnetic separation device; the inner wall of the core reduction zone of the reaction chamber is provided with a composite ceramic working layer, which is prepared through a sectional hot-pressing sintering process and has high density, high hardness and excellent thermal shock resistance; in the treatment process, the high-phosphorus oolitic hematite ore and a dephosphorization aid are jointly ball milled and dried, then sprayed into a carrier gas, and flash reduction is carried out in the core reduction zone with hydrogen as a reducing agent; the reduced product is separated by magnetic separation to obtain metallic iron powder and tailings, realizing efficient dephosphorization and rapid reduction of the high-phosphorus oolitic hematite ore, and having the advantages of short process flow, short reduction time, high dephosphorization rate and clean environment.
Owner:JIANGXI UNIV OF SCI & TECH

Preparation method of flue gas dephosphorizing agent

The invention relates to a preparation method of a flue gas dephosphorizing agent. The preparation method comprises the following steps: (a) mixing an alkaline compound and magnesium salt according to the molar ratio of carbonate to magnesium ions of 1: 0.85-1: 0.95; (b) stirring and reacting the mixed material obtained in the step (a) through a coprecipitation method at normal temperature and pH of 7.5-9; (c) heating the slurry obtained in the step (b) to 90 DEG C in a hydrothermal kettle, stirring for 15 hours, and filtering; (d) curing the solid obtained in the step (c) in steam of an isopropanol aqueous solution for 2-24 hours, drying, and roasting; (e) respectively adding calcium hydroxide, plant ash, dihydrate gypsum and sodium hypophosphite into the product obtained in the step (d), uniformly mixing and kneading, and then carrying out extrusion molding; and (f) irradiating the product obtained in the step (e) under ultraviolet light for 2-36 hours, and drying at 120 DEG C for 2 hours to obtain the flue gas dephosphorizing agent. The dephosphorizing agent prepared by the method disclosed by the invention has relatively high phosphorus capacity and strength.
Owner:WUHAN KELIN FINE CHEM

Method for enhancing sludge pyrolysis phosphorus conversion through cooperation of oxidizing agent and persistent free radicals

The invention provides a method for enhancing sludge pyrolytic phosphorus conversion through cooperation of an oxidizing agent and persistent free radicals, which comprises the following steps: (1) directly and mechanically dehydrating sludge, or adding persulfate for hydrothermal reaction, or adding a compound conditioner of ferrous sulfate and hydrogen peroxide for reaction, and dehydrating to obtain sludge with the water content of less than 60%; (2) the dehydrated sludge is mixed with an oxidizing agent, the adding amount of the oxidizing agent is 2-25 mmol / g dry sludge, a pyrolytic reaction is conducted under the anoxic condition, and after the pyrolytic reaction is finished, phosphorus-rich biochar generated through pyrolysis is collected; and (3) oscillating and soaking the collected phosphorus-rich biochar with an oxalic acid solution, carrying out solid-liquid separation to obtain a phosphorus-rich solution, adjusting the pH value of the phosphorus-rich solution to 4.5-5, and separating out phosphate crystals. The method has the remarkable advantages of being short in treatment process, high in organic phosphorus conversion rate, high in phosphorus product utilization rate and the like, and has important significance on rapid reduction and resource utilization of the municipal sludge.
Owner:WUHAN SURVEYING GEOTECHN RES INST OF MCC

A method for removing COD and recycling resources from high-phosphorus and high-COD production wastewater in the new energy industry

The application discloses a method for removing COD and recycling resources from high-phosphorus and high-COD production wastewater in a new energy industry, and comprises the following steps: extracting wastewater to obtain an aqueous phase; adjusting the aqueous phase to be acidic and aerating under heating; adjusting the acid-base degree of the wastewater after aeration by using an alkaline substance, and performing reverse osmosis; and obtaining concentrated phosphorus-rich liquid and recycling the obtained fresh water. The application has the advantages of good COD removal effect, a removal rate of more than 98%, high phosphorus recovery rate, hydrolysis of polyphosphate in the wastewater into orthophosphate in the process of acidification, heating and aeration, and recovery of more than 80% of the phosphorus by using reverse osmosis concentration to obtain the concentrated phosphorus-rich liquid, thereby greatly improving the phosphorus recovery rate. The treatment process is simple, the treatment cost is greatly reduced, the phosphorus is directly recycled into the concentrated liquid, the treatment cost of a large amount of solid waste generated by the precipitation method and the cost of an additional precipitant are avoided, and the cost of wastewater treatment is greatly reduced.
Owner:CHANGSHA DESIGN & RES INST OF CHEM IND MIN

A method for preventing slag from falling during secondary tapping

ActiveCN117210634BLiquid slagAlloy
The present application belongs to the field of steelmaking continuous casting, and relates to a method for preventing slag from falling during secondary tapping, reducing the temperature of the slag, changing the liquid slag into semi-molten slag, and effectively avoiding the slag from being rolled into the tapping hole and entering the ladle during secondary tapping. The present application reduces the high phosphorus content of the slag caused by secondary tapping, reduces the influence of the slag on the alloy yield caused by secondary tapping, eliminates the negative influence of secondary tapping when the molten steel is not completely tapped due to operation errors or other reasons, saves the composition out-of-specification caused by the incomplete tapping of the molten steel, and eliminates the influence of the incomplete tapping of the molten steel on the slag splashing and furnace protection.
Owner:CHONGQING IRON & STEEL CO LTD

Preparation method of sewage treatment phosphorus removal filler and application thereof

This invention discloses a method for preparing phosphorus removal packing material for wastewater treatment and its application, relating to the field of wastewater treatment technology. The method includes the following steps: preparing a quaternary ammonium salt-lanthanum hybrid organosilane modifier; preparing an activated porous biochar; and grafting the quaternary ammonium salt-lanthanum hybrid organosilane modifier onto the activated porous biochar to obtain the wastewater treatment phosphorus removal packing material. The packing material prepared by this invention has high phosphorus removal efficiency and strong selectivity, and possesses excellent bactericidal and anti-bioclogging capabilities. Its active components are firmly grafted through covalent bonds, exhibiting good stability and allowing for multiple regenerations, effectively avoiding secondary pollution.
Owner:SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD

Application of rice gene in regulating phosphorus homeostasis

The application of a rice gene in regulating phosphorus homeostasis, the nucleotide sequence of the rice OsSPL17 gene is shown as SEQ ID NO. 1, and the amino acid sequence of the encoded protein of the rice OsSPL17 gene is shown as SEQ ID NO. 2. By cloning the rice gene OsSPL17, a transgenic vector is constructed, and OsSPL17 gene overexpression rice and OsSPL17 gene deletion rice are obtained. The phenotypic traits of the transgenic rice are determined, and it is found that compared with the wild type rice, the phosphorus content of the transgenic rice changes, the overexpression rice has a lower phosphorus absorption rate in a high phosphorus environment, and the degree of high phosphorus toxicity of the plant is reduced; and the phosphorus absorption rate of the deletion rice increases in a low phosphorus environment, and the phosphorus utilization rate of the rice is improved. It is shown that the OsSPL17 gene plays an important regulatory function in the phosphorus utilization of the rice, maintains the phosphorus homeostasis of the rice, and is helpful to improve the phosphorus fertilizer utilization rate.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY

A long-chain alkyl surfactant-mediated lanthanum hydroxide material, its preparation method and application

ActiveCN117225371BOther chemical processesWater contaminantsActive agentLanthanum hydroxide
This invention relates to a long-chain alkyl surfactant-mediated lanthanum hydroxide material, its preparation method, and its applications. The lanthanum hydroxide material is synthesized by alkaline co-thermal precipitation of a soluble lanthanum salt and alkyltrimethylammonium bromide in a pressure-resistant reactor under closed conditions. This yields a long-chain alkyl surfactant-mediated lanthanum hydroxide material with optimal adsorption performance, suitable for removing phosphorus nutrients from low-concentration phosphorus wastewater. Compared with existing technologies, the long-chain alkyl surfactant-mediated lanthanum hydroxide material provided by this invention not only possesses good dispersibility but also exhibits higher phosphorus adsorption capacity and rate through the regulation of its physicochemical properties. Compared with lanthanum hydroxide prepared by conventional hydrothermal precipitation methods, its phosphorus separation performance is significantly higher.
Owner:TONGJI UNIV

Preparation method and application of high phosphorus removal magnetic biochar

The application relates to a high-phosphorus-removal magnetic biochar as well as a preparation method and application thereof. The preparation method of the magnetic biochar comprises the following steps: mixing biomass and a FeCl3 solution to obtain a biomass-FeCl3 mixed solution, dehydrating the biomass-FeCl3 mixed solution to a water content of 68-78%, then adding calcium oxide to mix and expand, pressing, calcining, and crushing to obtain the magnetic biochar. The present inventors accidentally find, through a large number of experiments, that the prepared magnetic biochar, which is obtained by baking a mixed solution of a ferric chloride solution and biomass to a specific water content, then adding calcium oxide to mix and expand, not only improves the adsorption capacity of the biochar, but also enhances the phosphorus adsorption capacity of the magnetic biochar in neutral and weak alkaline sewage, effectively solving the problem that the phosphorus removal effect of the magnetic biochar in weak alkaline sewage is poor.
Owner:SUZHOU UNIV OF SCI & TECH

Method for producing clean alpha gypsum by using phosphorite and phosphogypsum as raw materials

The invention belongs to the technical field of wet-process phosphoric acid production, and particularly relates to a production method for producing clean alpha gypsum by taking phosphorite and phosphogypsum as raw materials, which comprises the following steps: (1) mixing phosphoric acid, sulfuric acid and a crystal modifier to obtain mixed acid slurry A; (2) adding the mixed acid slurry A into dihydrate gypsum, reacting for 1-6 hours at the temperature of 60-105 DEG C to prepare an alpha gypsum seed crystal, adding a phosphorite raw material and concentrated sulfuric acid into the slurry to obtain reaction slurry, and continuously reacting for 1-6 hours under the condition that the temperature of the reaction slurry is kept at 60-105 DEG C to obtain alpha gypsum slurry B; and (3) carrying out solid-liquid separation on the alpha gypsum slurry B to obtain a solid phase C and a liquid phase D, and washing the solid phase C with clear water to obtain a solid phase E and a liquid phase F, the solid phase E being clean alpha-gypsum. The method has the advantages that the produced alpha gypsum is easy to filter and wash, the phosphorus recovery rate is high, additional heat energy is not needed, energy is saved, consumption is reduced, and phosphorite passivation is effectively avoided.
Owner:GUIYANG XINGFAN TECHNICAL SERVICE CO LTD

Method for producing phosphorylated polysaccharide aqueous solution

To provide a method for producing a phosphorylated polysaccharide aqueous solution that enables production of a phosphorylated polysaccharide having a high phosphorus content ratio.SOLUTION: A method for producing a phosphorylated polysaccharide aqueous solution includes reacting a mixed solution containing a polysaccharide and an alkali compound with a phosphate ester compound, wherein the phosphate ester compound is added to a reaction system in multiple divided portions or continuously supplied to the reaction system.SELECTED DRAWING: None
Owner:MITSUBISHI GAS CHEM CO INC

Method for efficiently recovering phosphorus from waste activated sludge

The invention relates to a method for efficiently recovering phosphorus from waste activated sludge, which comprises the following steps: S1, carrying out centrifugal dewatering on sludge, and carrying out ultrasonic treatment at normal temperature to obtain pretreated sludge, S2, mixing the pretreated sludge with a natural deep eutectic solvent, carrying out stirring reaction, dissolving out phosphorus, and carrying out centrifugal separation on a liquid phase and a solid phase to obtain the phosphorus. S3, adding a coagulant into the liquid phase, keeping the molar ratio of Fe / P at 1.5, adjusting the pH to 7.0, reacting for 1 hour under an anaerobic condition at a stirring rate of 200rpm, then standing the mixture for 2 hours, and performing reduced pressure distillation or water addition on the liquid phase to regenerate the natural deep eutectic solvent in the liquid phase, thereby obtaining a phosphorus-containing liquid phase and the natural deep eutectic solvent after separation; the method has the advantages of high phosphorus recovery rate and no secondary pollution.
Owner:XINZHENG ZEYUAN WATER CO LTD

Preparation method and application of adsorbent for removing phosphorus from oily solid waste pyrolyzed ash

The invention discloses a preparation method and application of an adsorbent for removing phosphorus from oily solid waste pyrolysis ash, and belongs to the technical field of solid waste resource utilization and polluted water treatment in environmental protection. According to the method, the oil-containing solid waste pyrolysis ash, anhydrous calcium chloride and sodium hydroxide are used as main materials, and the phosphorus removal adsorbent for the oil-containing solid waste pyrolysis ash is obtained through an alkali fusion method and a precipitation method. The dephosphorization adsorbent prepared by the method has good adsorption selectivity and trace processing performance on high-concentration phosphate, and has relatively large adsorption capacity. The prepared dephosphorization adsorbent for the oily solid waste pyrolysis ash has the advantages of large specific surface area and the like, and provides technical reference for adsorption and removal of anions in wastewater. According to the invention, the selected raw material is the oil-containing solid waste, and the oil-containing solid waste is utilized to prepare the environment-friendly efficient phosphorus adsorption material, particularly, the material has specific adsorption on a solution with high phosphorus concentration, and the potential application range of the pyrolysis ash containing the solid waste is expanded.
Owner:WUHAN UNIV OF TECH +1

Phosphorus removal agent and preparation method thereof

The present invention proposes a kind of phosphorus remover and preparation method thereof, and its preparation method includes:Myristamidopropyl PG-dimethylammonium chloride phosphate and brominated tetradecylpyridine are mixed and prepared into an aqueous solution, heated to 70-80 DEG C, sodium bentonite is added, and insulation stirring is processed for 1-3h, centrifugation, drying, and crushing to obtain organic bentonite;Iron salt and lanthanum salt are configured into an aqueous solution, organic bentonite is added, under ultrasonic conditions, stirring is processed for 5-10h, centrifugation, drying, and crushing to obtain phosphorus remover.The phosphorus remover prepared by the present invention not only has a high phosphorus removal rate, and phosphorus removal is rapid, and the moisture content of the precipitate obtained after phosphorus removal is also lower, and it is easy to carry out solid-liquid separation, with good application prospects.
Owner:GUANGZHOU BOFANG ENVIRONMENTAL PROTECTION TECH