13 results about "Ammonium oxidation" patented technology

The present invention belongs to the technical field of sewage treatment. Disclosed is a biological adsorption-partial nitrification-anaerobic ammonium oxidation process based on a functional carrier. The process of the present invention is mainly composed of a biological adsorption section, a partial nitrification section, and an anaerobic ammonium oxidation section, wherein in the biological adsorption section, microorganisms in a logarithmic growth phase are screened and enriched by means of a short hydraulic retention time, and organic matters can be efficiently adsorbed; in the partial nitrification section, a nitrification functional carrier is added to enhance the adsorption of ammonia nitrogen, so as to enrich ammonium oxidation bacteria, and a relatively low level of dissolved oxygen is controlled, so that stable partial nitrification is achieved; and in the anaerobic ammonium oxidation section, an anaerobic ammonium oxidation functional carrier is added, so that the biomass and activity of anaerobic ammonium oxidation bacteria are improved by means of enrichment, and the autotrophic nitrogen removal efficiency is improved. The present invention does not need an additional carbon source, has a small aeration amount and low operating costs, and has great prospects in engineering applications.

The invention relates to the technical field of glass, in particular to a preparation process of 3D curved glass. The process comprises the following steps: S1, mixing diboron trioxide, ammonium dihydrogen phosphate, lithium oxide, calcium carbonate, cerium oxide, samarium oxide and ytterbium oxide, grinding, sieving, uniformly mixing, and heating to obtain a liquid phase substance; s2, clarifying the liquid-phase substance, introducing the clarified liquid-phase substance into a mold cavity, and carrying out hot bending forming to obtain a crude blank; and S3, annealing the rough blank, and carrying out fine trimming to obtain the 3D curved glass. The curved glass provided by the invention is excellent in mechanical property, high in impact resistance, uniform in display and free of deformation and distortion.

The application relates to the technical field of ammonium oxidation, and discloses an anode material for ammonium oxidation under a low-concentration chloride ion condition and a preparation method thereof.The anode material takes manganese dioxide as a carrier and is loaded with monatomic silver, and the loading amount of the monatomic silver is less than 0.1 wt%.In the preparation process, first, constant current density electrodeposition is carried out to prepare a MnO2 / platinum-coated titanium mesh; then, a wet chemical immersion method is used to load Ag on the MnO2 substrate; finally, high-temperature air atmosphere calcination is carried out to prepare a monatomic Ag / MnO2 anode material.The application utilizes the acid resistance of MnO2 itself and the strong metal carrier interaction between metal Ag and MnO2 to realize stable and continuous electrolysis operation; and Ag and MnO2 realize the enrichment of low-concentration chloride ions at the anode interface through chemical affinity and physical adsorption, thereby realizing the efficient generation of active chlorine under the condition of low-concentration chloride ions.

The invention relates to the technical field of hot sherardizing coatings, in particular to a production process for improving the corrosion resistance of a hot sherardizing coating, which comprises the following steps: after a metal workpiece is subjected to acid pickling derusting treatment, stainless steel grit is adopted for shot blasting treatment; preparing furnace charge, mixing 50 parts by mass of zinc powder with a specific particle size, 30 parts by mass of aluminum oxide, 20 parts by mass of zinc oxide, 3 parts by mass of graphite powder, 2 parts by mass of cerium oxide, 2 parts by mass of lanthanum oxide, 2 parts by mass of ammonium oxide and 3 parts by mass of zirconium oxide according to a set mass ratio, adding a zircon sand carrier, and uniformly stirring; according to the method, the pretreatment process is standardized, a 10% hydrochloric acid solution is adopted for acid pickling and matched with deionized water for flushing, and then stainless steel grit shot blasting is conducted according to specific parameters, so that the effects of thoroughly removing oxide skin, rust and residual acid liquor on the surface of the workpiece, optimizing the surface roughness and providing a good substrate for zinc atom diffusion bonding are achieved.

This invention belongs to the field of wastewater treatment. It provides a manganese-supported sulfur-rich Spartina alterniflora denitrification material, its preparation method, and its application. This manganese-supported sulfur-rich Spartina alterniflora denitrification material is obtained by alkali-modified sulfur-rich Spartina alterniflora or alkali-modified sulfur-rich Spartina alterniflora biochar loaded with manganese oxides. The manganese-supported sulfur-rich Spartina alterniflora denitrification material of this invention has abundant pores and a large specific surface area, which is beneficial for the adsorption, catalytic oxidation, and microbial biofilm formation of nitrogen pollutants. It is also rich in carbon, sulfur, and manganese, and can directly release organic carbon sources. It can achieve efficient denitrification through multiple processes such as coupled nitrification, manganese ammonium oxidation, heterotrophic denitrification, manganese autotrophic denitrification, and sulfur autotrophic denitrification. The manganese-supported sulfur-rich Spartina alterniflora denitrification material of this invention is fixed on the surface of hard aggregates, elastic or soft carriers, and can be widely used in constructed wetlands, biological filters, deep denitrification in wastewater treatment plants, rural and agricultural wastewater treatment, and initial rainwater purification.

The invention discloses a device and a method for coupling Fenton residual iron sludge with iron ammoxidation and anaerobic ammoxidation. The device comprises a water inlet tank, a five-section reactor, a secondary sedimentation tank and a Fenton reactor which are connected in sequence. According to the method, iron sludge (containing ferric iron) generated by a Fenton reactor flows back to a five-section reactor to realize enrichment of iron ammonium oxidation flora in activated sludge, nitrite and nitrate nitrogen generated by iron ammonium oxidation are directly or indirectly utilized by anaerobic ammonium oxidation bacteria on filler, and anaerobic ammonium oxidation reaction is performed; nitrate nitrogen generated in the aerobic zone can be subjected to short-cut denitrification anaerobic ammonia oxidation reaction by utilizing a carbon source and ammonia nitrogen in inlet water for denitrification. According to the method, reduction and innocent treatment of the Fenton iron sludge are realized, and refractory organic matters are removed while high nitrogen and phosphorus removal efficiency of the industrial wastewater is realized.

The invention provides a composite oxidant type emulsified granular ammonium nitrate fuel oil explosive and a preparation method thereof, and belongs to the technical field of ammonium nitrate fuel oil explosives, the composite oxidant type emulsified granular ammonium nitrate fuel oil explosive comprises the following components by weight: 80-94% of a composite oxidant type porous granular ammonium nitrate fuel oil explosive, 5-15% of an emulsion matrix, and 1-5% of an additive; the composite oxidant type porous granular ammonium nitrate fuel oil explosive consists of the following components in percentage by weight: 80-90% of porous granular ammonium nitrate, 5-15% of calcium nitrate and 5-6% of liquid diesel oil. According to the composite oxidizing agent type emulsified granular ammonium nitrate fuel oil explosive, safe and environment-friendly porous granular ammonium nitrate and calcium nitrate are used as the composite oxidizing agent, and the porous granular ammonium nitrate is replaced by 5-15% of calcium nitrate, and the composite oxidizing agent is used for replacing a single porous granular ammonium nitrate oxidizing agent; the production cost of the prepared composite oxidant type emulsified granular ammonium nitrate fuel oil explosive product can be reduced under the condition that the performance is not attenuated, meanwhile, toxic gas generated after explosion is reduced, the density of the product is increased, and the working capacity of the product is enhanced.

The invention discloses a copper-based deep desulfurizer which is prepared by the following steps: dissolving soluble copper salt in water to obtain a solution A, dissolving an alkaline precipitator in water to obtain a precipitator solution B, mixing the solution A and the precipitator solution B according to a certain proportion in a stirring kettle, and uniformly stirring to obtain the copper-based deep desulfurizer. Adding a certain amount of a solution B prepared by the same method to adjust the pH value of the solution to be alkaline, heating the solution to 55-70 DEG C, continuously reacting for a period of time, and filtering, washing and drying to obtain a solid C; roasting the solid C to obtain a solid D; and taking a certain amount of the solid D, ammonium molybdate, zinc oxide powder and a binder, mixing, adding water, extruding into strips, curing by using 120 DEG C water vapor generated by adding hot water in a closed reaction kettle, and drying after curing to obtain the copper-based deep desulfurizing agent. The desulfurizer has an ultra-high-precision removal effect on sulfides, and the desulfurization precision of the existing zinc oxide desulfurizer is improved from less than or equal to 0.03 ppm of total sulfur to less than or equal to 0.005 ppm of total sulfur.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for in-situ treatment of wastewater containing high ammonia nitrogen and toxic organic matter using an ammonia-mediated iron cycle technology. This invention proposes a novel strategy involving ammonium oxidation-mediated Fenton iron sludge regeneration of Fe(II) and Fenton oxidation removal of organic pollutants from wastewater. Ammonium ions are used as a resource to mediate the Fenton iron cycle reaction. During the Fenton reaction, Fe(II) reacts with the oxidant H₂O₂ to generate trivalent iron sludge, and then NH₄⁺... + -N reacts with Fe(III) in Fenton iron sludge via a Feammox reaction to regenerate Fe(II), which is then reused in the Fenton reaction. This achieves iron recycling within the reactor and reduces secondary pollution from the iron sludge. Therefore, applying the method of this invention to wastewater treatment offers significant advantages, including low treatment costs, reduced secondary pollution from iron sludge, and simultaneous removal of ammonia nitrogen and toxic organic compounds from the wastewater.

The present application relates to a kind of road vehicle carbon ceramic brake disc with organic ceramic brake pad and its preparation method, raw material includes the following components by weight percentage: phenolic resin 1~4%, boron modified phenolic resin 1~5%, aluminum metaphosphate 4~15%, sodium silicate 3~7%, ammonium fluoride 1~3%, magnesium oxide 1~5%, copper oxide 3~5%, aluminum powder 2~6%, carbon fiber 1~6%, aramid pulp 1~6%, steel fiber 8~15%, reduced iron powder 15~20%, red copper powder 6~12%, antimony oxide 1~3%, zinc borate 5~8%, diantimony trisulfide 2~6%, molybdenum disulfide 4~6%, calcined petroleum coke 5~8%, aluminum titanate 1~5%, titanium oxide 1~4%, zirconium oxide 5~12%, silicon carbide 4~8%, dichromic anhydride 2~6%.The brake pad of the present application has good friction coefficient stability, wear resistance, solves the technical bottleneck of existing carbon ceramic brake disc brake pad.

This invention relates to the field of glass technology, and more particularly to a process for preparing 3D curved glass. The process includes the following steps: S1, mixing boron trioxide, ammonium dihydrogen phosphate, lithium oxide, calcium carbonate, cerium oxide, samarium oxide, and ytterbium oxide, grinding and sieving them until uniformly mixed, and heating to obtain a liquid phase; S2, clarifying the liquid phase, guiding the clarified liquid phase into a mold cavity, and hot-bending it to obtain a rough blank; S3, annealing the rough blank, and refining it to obtain the 3D curved glass. The curved glass provided by this invention has excellent mechanical properties, strong impact resistance, and uniform display without deformation or distortion.

This invention discloses an apparatus and method for coupling ferroammonia oxidation and anaerobic ammonia oxidation of Fenton waste sludge, comprising an influent tank, a five-stage reactor, a secondary sedimentation tank, and a Fenton reactor connected in sequence. This invention enriches the ferroammonia-oxidizing bacteria in the activated sludge by recirculating the sludge (containing ferric iron) produced in the Fenton reactor to the five-stage reactor. The nitrite and nitrate nitrogen produced by ferroammonia oxidation are directly or indirectly utilized by anaerobic ammonia-oxidizing bacteria on the packing material for anaerobic ammonia oxidation. The nitrate nitrogen produced in the aerobic zone can be denitrified using carbon sources and ammonia nitrogen in the influent through short-cut denitrification anaerobic ammonia oxidation. This invention achieves volume reduction and harmless treatment of Fenton waste sludge, achieving high nitrogen and phosphorus removal efficiency in industrial wastewater while removing recalcitrant organic matter.

The invention discloses a composite-based biochar material for mine acid tail water treatment and a preparation method thereof.The composite-based biochar material is based on bamboo reed-based activated carbon high in ash content and is combined with ammonium hydrogen phosphate, magnesium oxide, calcium hydroxide, carboxymethyl cellulose and other components to form a slow-release composite-based material; the composite material realizes rapid adjustment of the pH value of the acidic mine tail water, efficient adsorption of heavy metals and improvement of the long-term stability of the treatment effect through a multi-component synergistic effect.