60 results about "High phosphorus" patented technology

The present invention relates to a method for treating wastewater with high phosphorus content, high turbidity and high oil content, comprising S1, using a sand settling tank to remove sand and gravel in the wastewater; S2, using an oil removal and decolorization tank to remove pigments and oil in the wastewater; S3, passing the wastewater into a reaction tank, adding a suitable weight of lime to the reaction tank according to the phosphorus content, and then adding a suitable weight of flocculant to the reaction tank, the flocculant and the suspended matter in the wastewater undergo flocculation reaction to generate large particles of solid; S4, using an inclined tube sedimentation tank to remove large particles of solid; S5, using a phosphorus adsorption filler layer in a deep filtration tank to adsorb the residual phosphorus in the wastewater, and a filter material layer to filter out small particles of solid in the wastewater; S6, after the water quality test is qualified, the wastewater is discharged. The present invention can remove pigments and oil in the wastewater, reduce pollutants, and improve the quality of effluent water by setting an oil removal and decolorization tank. The deep filtration tank can further remove micro suspended matter and pollutants such as phosphorus in the wastewater to improve the quality of effluent water.

The invention provides an organic-inorganic composite conditioner for improving a soil structure. Comprising the following raw materials in parts by mass: 100-150 parts of calcium, 20-50 parts of magnesium, 10-20 parts of polyglutamic acid, 0.5-2 parts of zinc, 2-4 parts of boron, 2-4 parts of iron, 100-150 parts of organic nitrogen, 150-200 parts of composite organic natural polypeptide amino acid, 50-70 parts of seaweed boron molybdenum, 50-80 parts of phosphorus calcium zinc liquid, 20-50 parts of seaweed calcium magnesium boron iron zinc and 100-120 parts of a plant nutrition preparation. The fertilizer is prepared from the following raw materials in parts by weight: 10-15 parts of high phosphorus and high potassium, 150-200 parts of organic waste compost, 50-80 parts of a synergist and 50-100 parts of a functional microbial agent. Through a unique chelation technology, polyglutamic acid and calcium and magnesium ions are fully fused to form an efficient medium trace element water-soluble fertilizer, calcium and magnesium are directly absorbed by a root system after flushing application, the calcium utilization rate is improved by 50% or above, and due to the fact that polyglutamic acid carries strong negative charges, fertilizer loss caused by rainwater leaching is effectively reduced, and the yield of the fertilizer is improved. And the water-retaining and fertilizer-retaining functions are more obvious when the fertilizer is used in sandy loam.

The invention relates to the technical field of mineral processing, and provides a process for recovering phosphorus from vanadium titano-magnetite tailings, which comprises the following steps: S1, magnetic separation: carrying out ore grinding treatment and low intensity magnetic separation tailing discarding treatment on the vanadium titano-magnetite tailings to obtain magnetic minerals and non-magnetic minerals for later use; s2, pulp mixing is conducted, specifically, water is added into non-magnetic minerals, stirring is conducted, and ore pulp is obtained for standby application; a sodium carbonate aqueous solution is added into the ore pulp, stirring is carried out, a gangue inhibitor and water are added, stirring is carried out, a collecting agent and water are added, stirring and foam scraping are carried out, roughed concentrate and scavenging feed ore are obtained for standby application, and the gangue inhibitor is a mixture of modified water glass and sodium hexametaphosphate with the mass ratio being 1: (0.3-0.6); and S4, concentration is conducted, specifically, primary concentration, secondary concentration and third concentration are conducted on the roughed concentrate, and final phosphate concentrate is obtained. The process for recycling phosphorus from the vanadium titano-magnetite tailings has the advantages that the flotation reagent dosage is low, and the obtained phosphorus concentrate has the high phosphorus grade.

The invention relates to the field of environment and agricultural biotechnology, in particular to a phosphorus-solubilizing fungus, a phosphorus-solubilizing microbial inoculum and application thereof.The classification name of a phosphorus-solubilizing fungus strain XF2 is Penicillium deserticola, the strain XF2 is preserved in China General Microbiological Culture Collection Center (CGMCC) on January 9, 2025, and the preservation number is CGMCC NO: 41748. The bacterial colony characteristic of the strain XF2 is round, the edge is in a winding texture fluffy shape, the bacterial colony is yellow green or grey green, the surface is relatively smooth, and the bacterial colony can grow in a feather shape or a radial shape. Besides, after the strain XF2 is subjected to culture condition optimization, the phosphorus solubilizing amount can reach 874.3 mg / L. Therefore, the phosphorus solubilizing fungus has the advantage of high phosphorus solubilizing capacity, can be used for preparing a phosphorus solubilizing bacterial agent, has a very good application prospect, and particularly has a good application prospect in the aspects of dissolving phosphate ore and developing a phosphorus solubilizing fungus fertilizer.

The invention discloses a heavy metal-tolerant phosphate-solubilizing Leclercia adcarboxcarboxy YZ30 strain and application thereof, and belongs to the field of microorganisms, the strain is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number is CCTCC NO: M 20211025. The phosphorus solubilizing amount of the strain to insoluble inorganic phosphorus (calcium phosphate) reaches 705.82 mg / L, the phosphorus solubilizing amount to insoluble organic phosphorus (calcium phytate and calcium and magnesium phytate) reaches 698.89 mg / L and 688.48 mg / L, and the strain has high tolerance to heavy metals such as zinc, cadmium and chromium and can keep high phosphorus solubilizing amount under the maximum tolerance concentration of 1050 mg / kg (zinc), 450 mg / kg (cadmium) and 1248 mg / kg (chromium). In addition, the compound has a certain degradation effect on aniline, and the degradation rate is 32.94%. The strain has relatively strong phosphate solubilizing capacity and heavy metal tolerance, can be used for repairing and reclaiming heavy metal polluted land, and has a very wide application prospect.

The invention provides a continuous high-phosphorus chemical nickel plating method, which comprises the following steps: preparing a chemical plating solution containing nickel salt, a complexing agent and an additive, adding a first reducing agent and a second reducing agent into the plating solution according to a mass ratio of (3-5): (1-2), the second reducing agent is one or more of lithium aluminum hydride, sodium borohydride, propionic acid or succinic acid; and the PH value of the plating solution needs to be adjusted to 4.5-5.5, the temperature of the plating solution is controlled to be 80-90 DEG C, and then continuous plating operation is conducted. The first reducing agent can stably release active phosphorus atoms at a low temperature, a rich phosphorus source is provided for the plating layer, and it is guaranteed that the plating layer reaches the high phosphorus content; the second reducing agent can effectively promote the reduction deposition process of nickel ions, and the deposition rate is increased. The two reducing agent components cooperate with each other, so that the plating solution keeps high stability, fluctuation of the plating solution components is effectively inhibited, and the consistency and stability of the plating layer quality are obviously improved.

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.

The invention discloses a composite porous phosphorus removal filter material and a preparation method thereof, the filter material is prepared by taking aluminum hydroxide, limestone, concrete, perlite, modified zeolite, a foaming agent and a mixture of euglena, chlorella and spirulina as main components through the steps of pulping, foaming, coating, curing, crushing, screening and the like. The phosphorus removal efficiency is remarkably improved through ion exchange and chemical adsorption effects of the modified zeolite, the performance of the filter material is further enhanced through biological adsorption and biological assimilation effects of the microalgae, and in addition, the phosphorus removal effect of the filter material is further improved through stable precipitates formed by special components and phosphate. The filter material has the advantages of efficient phosphorus removal, environmental protection, no pollution, multifunctionality, economical efficiency and the like, is suitable for the fields of sewage treatment plants, lake remediation, aquaculture and the like, and has the advantages of high phosphorus removal efficiency, simple preparation process, low raw material cost and easiness in industrial production.

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.

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.

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.

The invention discloses phosphorus-doped petroleum coke and a preparation method thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: S1, crushing and screening petroleum coke serving as a raw material to form petroleum coke powder of 20-500 microns, and then pre-oxidizing in an air atmosphere to obtain pre-oxidized petroleum coke; s2, taking the pre-oxidized petroleum coke obtained in the step S1 as a raw material, taking phosphoric acid as a phosphorus source, and performing grafting reaction on phosphoric acid molecules and oxygen-containing functional groups in the petroleum coke under a reflux condition to obtain a reaction sample; the concentration of the phosphoric acid is 50-85wt%, and the mass ratio of the pre-oxidized petroleum coke to the phosphoric acid is 1: (0.1-10); and S3, carrying out heat treatment on the reaction sample obtained in the step S2 under inert gas to obtain the phosphorus-doped petroleum coke. The method provided by the invention is a method for simply realizing the petroleum coke with high phosphorus doping amount, can expand the application of the petroleum coke-based material, and effectively improves the performance of the material.

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.

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.

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%.

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.

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.

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.

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.

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.

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.

The invention discloses a modification method of a stainless steel mesh cathode and application of the stainless steel mesh cathode in sewage phosphorus recovery of a microbial electrolysis cell, and belongs to the field of sewage phosphorus recovery. The modification method of the stainless steel mesh cathode comprises the following steps: preparing a Ni-Co-Sn modified stainless steel mesh cathode by taking a stainless steel mesh as a cathode and adopting an electro-deposition method; electrolyte used in the electrodeposition method comprises sodium citrate, nickel sulfate, cobalt sulfate, stannous mono-sulphate, boric acid and sodium chloride. According to the method, the stainless steel mesh which is cheap and more beneficial to struvite crystal attachment is selected as the cathode, the stainless steel mesh cathode is modified through nickel, cobalt and tin, the phosphorus recovery rate is increased by improving the hydrogen evolution performance of the stainless steel mesh cathode, the reaction time is shortened, and the purpose of obtaining the high phosphorus recovery rate within a short time is achieved.

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.

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.

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.

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.

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.

The invention discloses a preparation method of an organic-inorganic heterostructure multistage fireproof coating with high phosphorus and nitrogen content. The preparation method comprises the following steps: (1) preparing a base material; (2) preparation of a PCP coated MoS2 composite flame retardant; (3) preparing the high-phosphorus-nitrogen-content organic-inorganic heterostructure multi-stage fireproof coating; according to the invention, octadecylamine is used as a template to synthesize a two-dimensional polydopamine nanosheet (PDA nanosheet), and hexachlorocyclotriphosphazene (HCCP) with high phosphorus and nitrogen content is grafted on the PDA nanosheet to obtain the product PCP; then molybdenum disulfide nanoflowers (MoS2) with catalytic char forming capacity and high thermal stability uniformly cover the surface of PCP to prepare an organic-inorganic hybrid multistage flame retardant (PCP (at) MoS2) with excellent thermal stability, and finally, the novel flame retardant PCP (at) MoS2 is applied to water-borne epoxy resin (EP) to successfully prepare the fireproof coating with good fireproof performance and smoke suppression effect.

The invention relates to a device and method for recovering phosphorus from acid oil wastewater and preparing a water treatment carbon source, the device comprises a wastewater concentration unit and a phosphorus recovery reaction unit, the wastewater concentration unit comprises a heating stirring tank and a cooling crystallization tank, and the phosphorus recovery reaction unit comprises two phosphorus recovery reaction tanks. The wastewater is concentrated by adopting the characteristics that the solubility change of sodium sulfate at 0-45 DEG C is large and free water in the wastewater can be converted into crystal water to form mirabilite during crystallization precipitation, and compared with an MVR (mechanical vapor recompression) method and an electrodialysis reverse osmosis method, the structure is simple, the equipment investment is low, and the operation cost is saved; the acid oil wastewater is subjected to resource utilization. By utilizing the characteristics of high phosphorus content, high COD (Chemical Oxygen Demand) equivalent and good biodegradability of the acidified oil wastewater, a large amount of phosphorus resources can be recovered from the acidified oil wastewater and finally prepared into a water treatment carbon source.

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.