970 results about "High nitrogen" patented technology

Thermally stable gas generant compositions incorporate a combination of one or more primary nonazide high-nitrogen fuels selected from a group including tetrazoles, bitetrazoles, and triazoles, and salts thereof; and one or more secondary nonazide high nitrogen fuels selected from azodicarbonamide and hydrazodicarbonamide. The primary and secondary fuels are combined with phase-stabilized ammonium nitrate that when combusted, results in a greater yield of gaseous products per mass unit of gas generant, a reduced yield of solid combustion products, lower combustion temperatures, and acceptable burn rates, thermal stability, and ballistic properties. These compositions are especially suitable for inflating air bags in passenger-restraint devices.

The invention relates to a Y-zeolite containing anti-nitrogen-type hydrocracking catalyst, selecting proper Y-zeolite to assort with special acidic unformed sial, to make the catalyst have higher activity and medium-oil selectivity, able to directly process high-nitrogen content raw material without prerefining segment, and able to meet cracking active requirement of full circulation. It is applied to maximumly producing the clean fuel.

High nitrogen gas generant compositions, useful for inflating passenger restraint gas inflator bags, comprise a nitrogen rich coordination compound selected from coordination complexes comprised of anionic nitro and nitrito ligands coordinated with a transitional metal template, and nonmetallic or nonmetallic / metallic cations. The gas generant compositions generate relatively more gas and less solids, and are safer than known gas generant compositions. Certain gas generant compositions ignite at lower autoignition temperatures thereby facilitating the use of an aluminum or light weight metal pressure vessel. Other gas generants self-deflagrate eliminating the need for other constituents in the composition. Novel methods for the synthesis of nonmetal derivative coordination complexes, guanidine and hydrazine for example, are also presented.

The invention discloses a preparation method of a nitrogen-doped porous-structure carbon material and belongs to the technical field of inorganic material preparation. The preparation method utilizes a micromolecular carbon-containing compound as a raw material and comprises the following steps of based on the weight of the raw material, adding 0-400wt% of an inorganic base, 0-400wt% of an organic nitrogen-containing compound and 0-50wt% of a metal or metal oxide or inorganic metal salt into the raw material, carrying out uniform dispersion, and carrying out a reaction process in an inert gas protective atmosphere at a temperature of 400-900 DEG C for 0.5-12h so that the nitrogen-doped porous-structure carbon material having micropores, mesopores and macropores is obtained. The preparation method has simple processes, can be controlled easily, and realizes one-step combination of porous structure, functionalization nitrogen doping and metal particle modification. The nitrogen-doped porous-structure carbon material having high nitrogen content has a large capacitance value and good cycle performances, can be used as an oxygen reduction reaction catalyst having high activity, high selectivity and high stability and has a very large application prospect.

The invention provides a high-abrasion Ti(C, N) based metal ceramic tool and a preparation thereof. The Ti(C, N) based metal ceramic tool uses Ni and Co as a binder phase, is added with at least one carbonitride of Ti(Cx, N1-x) or (TiC)x plus (TiN)1-x as a basic batch, and consists of at least one composition of WC, Mo2C, Co, Ni, ZrC, Cr3C2, VC, TaC and NbC, and the balance being Ti(Cx, N1-x) or (TiC)x plus (TiN)1-x, wherein, an X value for adding the carbonitride of the Ti(C, N) based metal ceramic tool is as follows: X is less than or equal to 0.5 and more than or equal to 0.4, or the X is more than 0.5 and less than or equal to 0.7. The Ti(C, N) based metal ceramic tool is prepared according to the content of nitrogen by nitrogen pressure sintering or vacuum sintering combined with hot isostatic pressing treatment, thereby preventing nitrogen from escaping during the process of sintering high-nitrogen alloy, so that the high-nitrogen-carbon ratio in matrix and material hardness can be reliably guaranteed, and anti-oxidative abrasion property and anti-diffusive abrasion property of the material can be obviously increased through adding slight ZrC, Cr3C2, VC and other carbides into the basic batch; meanwhile, compactability and buckling strength of a low-nitrogen alloy structure can be obviously improved through optimally distributing each composition and content. The Ti(C, N) based metal ceramic tool is widely suitable for high-speed cutting tools of medium-low carbon steel and low alloy steel.

The invention describes a new method for treating sludge, which can result in the production of high nitrogen organically-augmented inorganic fertilizer that incorporates municipal sludges or biosolids or organic sludges that can compete with traditional fertilizers such as ammonium phosphate, ammonium sulfate and urea on the commodity fertilizer marketplace. The method takes advantage of the thixotropic property of dewatered biosolids or organic sludge to create a pumpable paste-like material from the biosolids or organic sludge that is then treated with an oxidizer to reduce odorant effects and an acid. This mix is then interacted with concentrated sulfuric and or phosphoric acids and an ammonia source or alternatively a hot or molten melt or salt of ammonium sulfate / phosphate to form a fertilizer mix. The present invention controls the heat, atmospheric pressure and retention time of the fertilizer mix in the reaction vessel. When a fertilizer melt is formed ammoniation is subsequently completed by the specific use of vaporized ammonia. The invention can also be an add-on to commercial production of ammonium salts. The fertilizer produced by the present invention contains more than 8 wt. % nitrogen and preferably 15 wt. % nitrogen. The invention is oriented to be tailored to the biosolids production for individual municipal waste treatment plants in order to keep the fertilizer manufacturing plants of the present invention small with a minimization of logistics and liability.

The invention describes a new method for the production of high nitrogen organically-augmented inorganic fertilizer that incorporates municipal biosolids or organic sludges that can compete with traditional fertilizers such as ammonium phosphate, ammonium sulfate and urea on the commodity fertilizer marketplace. The method creates a thixotropic paste-like material from the biosolids or organic sludge that is blended with hot or molten ammonium salts, especially a mixture of ammonium phosphate and ammonium sulfate. The invention can be an add-on to commercial production of ammonium salts or it can stand alone by manufacturing ammonium salts prior to their introduction to the conditioned biosolids. The invention is oriented to be tailored to production facilities for individual municipal waste treatment plants in order to keep manufacturing plants small with a minimization of logistics and liability.

A process for removal and recovery of nutrients and recycling of water from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids, digested solids, and biogas. A second step involves precipitating solids from the digested liquids. A third step involves stripping ammonia from the digested liquids. A fourth step involves injecting an exhaust stream of carbon dioxide drawn from the co-generator into the digested liquids to reduce the pH and raise the temperature of the digested liquid. A fifth step involves recycling the digested liquids back to the anaerobic digester for use in diluting in coming solid wastes. A sixth step involves passing the excess ammonia stripped from the digested liquid through the digested solids to recover nitrogen through aborption with the resultant digested solids being usable as a biofertilizer with a high nitrogen content. A seventh step involves capturing the biogas for use in a co-generation system.

Provided are various embodiments of a fertilizer composition. The fertilizer compositions include one or more compounds having a high nitrogen content, which may be measured by a carbon to nitrogen atom ratio. Also provided are methods for increasing nitrogen content in soil, promoting crop production and fertilizing.

The invention provides a super hard and tough, nano-crystal austenite steel bulk material having an improved corrosion resistance, and its preparation process. The austenite steel bulk material comprises an aggregate of austenite nano-crystal grains containing 0.1 to 2.0% (by mass) of a solid solution type nitrogen, wherein an oxide, nitride, carbide or the like of a metal or semimetal exists as a crystal grain growth inhibitor between and / or in said nano-crystal grains. For preparation, fine powders of austenite steel-forming components, i.e., iron and chromium, nickel, manganese, carbon or the like are mixed with a substance that becomes a nitrogen source. Mechanical alloying (MA) is applied to the mixture, thereby preparing nano-crystal austenite steel powders having a high nitrogen concentration. Finally, the austenite steel powders are consolidated by sintering by means of spark plasma sintering, rolling or the like.

The invention discloses a cellular Mn-Ti-based catalyst for low-temperature selective catalytic reduction (SCR) denitration reaction, and a preparation method and a using method. The catalyst comprises the following components in molar percent: 40 to 60 percent of TiO2, 5 to 16 percent of MnO2, 3 to 7 percent of Mn2O3, 2 to 4 percent of Mn3O4, 2 to 8 percent of CeO2, 1 to 3 percent of V2O5, 0.5 to 1 percent of Se, 0.5 to 1 percent of Sb, and 0.15 to 1.5 percent of Bi. The preparation method comprises the following steps of: first preparing Mn-Ti catalyst powder by a hydrothermal method, and then preparing modified cellular Mn-Ti-based catalyst by processes such as extrusion forming, soaking and the like so as to improve the low temperature SCR activity and the sulfur poisoning resisting capability of the catalyst. Furthermore, the catalyst prepared by the method has the advantages of high mechanical strength, high dispersibility of active substances and difficult sintering, can be applied to the low temperature SCR denitration reaction of flue gas, is directly arranged behind a dust removing device even a desulfurizing device, can greatly reduce the operational temperature and operation cost of the traditional SCR process, and has high nitrogen oxide removing rate at the temperature of about 100 DEG C.

This invention discloses a hydrogenation method for producing low-sulfur diesel oil. The method comprises: mixing base oil with hydrogen, introducing into a hydrogenation reactor to orderly contact hydrogenation protecting agent, hydrorefining catalyst I, hydrorefining catalyst II and freely selected hydrorefining catalyst III for reactions, cooling the effluent, and separating to obtain hydrogen-rich gas and liquid product. With the synergism of the catalysts, the whole catalyst activity is improved. By the method, high-sulfur, high-nitrogen and high-metal content diesel oil fraction can be treated under mild conditions, and low-sulfur diesel oil that can meet Europe III standard and Europe IV standard can be obtained. The method has such advantages as simple process, low operation pressure, low apparatus investment and low operation cost.

The invention discloses a transverse crack control method of high nitrogen steel continuous casting plate billet angle containing vanadium, the method can not only effectively eliminate transverse crack defect of the continuous casting billet surface and skin inferior angle, but also can eliminate the continuous casting billet surface longitudinal crack and surface transverse crack defect. The method synthetically applies following technique measures: presetting the mold cooling water amount, the wide face cooling water amount is 3000-30500 L / min, the narrow face cooling water amount is set to 360-365 L / min; improving casting pulling rate, the casting pulling rate is stabilized in 0.8-1.5 m / min, the vibration frequency is 140-210 Hz; after spruing the casting pulling rate, quickly putting casting powder into the mold, the alkalinity of the casting powder is 1.0-1.40, the melting point is 1100-1160 DEG C, when at 1300 DEG C, the viscosity is 0.10-0.40 Pa.s; reducing the second cool segment casting billet cooling water amount, and controlling the continuous casting ratio water amount in 0.55-0.60 L / kg by static or dynamic adjusting method.

An inerting system and method characterized by a primary air separation module configured to communicate with an upstream source of pressurized air at elevated temperature for production of a primary downstream flow of nitrogen-enriched air to be delivered to a space to be inerted; a secondary air separation module configured to communicate with the upstream source of pressurized air at elevated temperature for production of a supplemental downstream flow of nitrogen-enriched air to be delivered to a space to be inerted when high nitrogen-enriched airflow is desired during a high flow period; and a flow controller configured to provide a warming flow through the secondary air separation module to heat the secondary air separation module to above ambient temperature during a warming period other than the high flow period.

The invention discloses an integrated nitrogen and phosphorus recovery device in a struvite method, which relates to the field of environmental engineering water treatment and is a reactor for treating nitrogen and phosphorus-containing wastewater in a physicochemical method. Substances nitrogen and phosphorus in the wastewater are removed in a magnesium ammonium phosphate (struvite) form, and the substances are recovered and reused. The reaction device is in an integrated form, which comprises a precipitation zone, a mixing reaction zone, a crystal growth zone and a crystal trapping and water discharging zone from bottom to top sequentially, the mixing reaction zone is provided with a first-grade aerator, which is mainly a wastewater and reagent fully mixing and reacting zone; the crystal growth zone is provided with a second-grade aerator, which is mainly a struvite growth zone; in the precipitation zone, large-grain struvite crystals are mainly precipitated; and the crystal trapping and water discharging zone recovers the struvite crystals by a filter screen. In addition, the device uses external reflux to reinforce and to control the supersaturated rate of the struvite reaction, thus promoting the crystal growth. The device has simple technological process and has the advantages of short hydraulic retention time, high nitrogen and phosphorus recovery efficiency, high recovery pureness, little occupied area, low operation and maintenance cost and the like.

The invention provides a treatment combined process for pig farm waste water with high nitrogen content, which is characterized in that the process adopts a combined process realized by an unpowered inside and outside circulation (IOC) anaerobic reactor, an SBBR sequencing batch type biomembrane reactor and artificial swamp. The process flow of the combined process comprises the following steps: a, removing large-grain pollutants and floaters in sewage by mechanical grids; b, carrying out hydrolysis and acidification; c, using the inside and outside circulation anaerobic reactor for high-efficient anaerobic digestion; d, using SBBR reactor for aerobic / anoxic nitration; and e, carrying out the depth treatment by the artificial swamp, and realizing the high-efficient purification on the sewage through substrate filtering, absorption, precipitation, ion exchange, plant absorption and microbiological degradation. The invention can be applicable for the treatment and the integrated utilization of the waste water in big-and-middle-sized pig farms.

The invention describes a new method for treating sludge, which can result in the production of high nitrogen organically-augmented inorganic fertilizer that incorporates municipal sludges or biosolids or organic sludges that can compete with traditional fertilizers such as ammonium phosphate, ammonium sulfate and urea on the commodity fertilizer marketplace. The method takes advantage of the thixotropic property of dewatered biosolids or organic sludge to create a pumpable paste-like material from the biosolids or organic sludge that is then treated with an oxidizer to reduce odorant effects and an acid. This mix is then interacted with concentrated sulfuric and or phosphoric acids and an ammonia source or alternatively a hot or molten melt or salt of ammonium sulfate / phosphate to form a fertilizer mix. The present invention controls the heat, atmospheric pressure and retention time of the fertilizer mix in the reaction vessel. When a fertilizer melt is formed ammoniation is subsequently completed by the specific use of vaporized ammonia. The invention can also be an add-on to commercial production of ammonium salts. The fertilizer produced by the present invention contains more than 8 wt. % nitrogen and preferably 15 wt. % nitrogen. The invention is oriented to be tailored to the biosolids production for individual municipal waste treatment plants in order to keep the fertilizer manufacturing plants of the present invention small with a minimization of logistics and liability.

The present invention relates to high nitrogen doped corrugated carbon nanotube material and its synthesis process. The synthesis process includes the following steps: mixing Fe source and proper amount of distilled water, soaking porous molecular sieve to carry ferric oxide or ferrous oxide, stoving and roasting at 300-1000 deg.c for 0.5-24 hr to obtain catalyst; setting the catalyst inside a pipe furnace, leading organic amine into the furnace under the protection of Ar or N2 and reacting at 650-1000 deg.c for 0.2-4.0 hr to obtain high nitrogen doped corrugated carbon nanotube mixture containing the catalyst; soaking the mixture in proper amount of or excessive hydrofluoric acid, sulfuric acid, nitric acid or acid for 0.5-24 hr; and washing in distilled water, suction filtering and drying to obtain high nitrogen doped corrugated carbon nanotube material. The material has nitrogen content of 10-40 %, reinforced surface polarity, etc, and is suitable for industrial production.

The present invention provides a hydrodesulfurization that can attain an extremely high depth of desulfurization to a sulfur content of 10 ppm by mass, exert high denitrogenation activity, and has high nitrogen resisting properties to nitrogen compounds which are substances inhibiting desulfurization reaction. The catalyst is suitable for hydrodesulfurizing petroleum hydrocarbons and characterized in that an inorganic porous support composed of mainly alumina contains, as active metals, at least one metal selected from the metals of Group 8 of the periodic table and at least one metal selected from the metals of Group 6A of the periodic table in a molar ratio defined by [oxide of the Group 8 metal] / [oxide of the Group 6A metal] ranging from 0.105 to 0.265 and the content of the Group 6A metal in terms of oxide is in the range of 20 to 30 percent by mass based on the mass of the catalyst.

The invention relates to a metal-free nitrogen-doped functionalized mesoporous carbon catalyst and preparation method and applications thereof. A precursor of the metal-free nitrogen-doped functionalized mesoporous carbon catalyst comprises the following components in percentage by mass: 20-85% of template agent, 10-75% of nitrogen compound, and 5-50% of transition metal salt. The nitrogen compound is carbonized at high temperature under the existence condition of transition metal, to form a high-nitrogen-content pyridine and graphite nitrogen (Nx-C) composite structure, and the catalytic activity of oxygen can be remarkably enhanced; the transition metal in the nitrogen-doped mesoporous carbon catalyst can be removed through acid pickling, so that the inactivation (corrosion) of the catalyst containing the transition metal under the conditions of strong acid and strong alkali can be avoided, the characteristics of being high in stability, not easy to poison and the like can be achieved, and the metal-free nitrogen-doped functionalized mesoporous carbon catalyst has excellent application prospects in the fields of treating waste water of fuel batteries, metal-air batteries, supercapacitors, energy-storage batteries, microbial fuel cells, and the like.

The invention discloses a preparation method of high nitrogen content-doped porous carbon with a high specific surface area. The preparation method comprises the following steps: drying and smashing a biomass raw material to obtain particles and carbonizing the particles in a nitrogen atmosphere at a high temperature to obtain carbide; then, dispersing the carbide in a potassium hydroxide solution, and stirring and drying to obtain an alkali and carbon mixture; activating the alkali and carbon mixture at the high temperature in the nitrogen atmosphere, and washing, filtering and drying to obtain the porous carbon material; uniformly dispersing the porous carbon material in a strong acid solution for oxidation treatment, and filtering, washing and drying to obtain an oxidized porous carbon material; and finally, ammonifying the oxidized porous carbon material at the high temperature in an ammonia atmosphere to obtain the high nitrogen content-doped porous carbon with the high specific surface area. The specific surface area of the doped porous carbon is 2500-3500<m2> / g, the pore diameter of the material is 0.5-6nm and the nitrogen content is 4-12%. The method disclosed by the invention is simple and effective, easy to operate, convenient for batch production on a large scale and suitable for application in industrial production.

The invention relates to a water-soluble fertilizer containing urea humate and a preparation method thereof. The water-soluble fertilizer comprises the following components in parts by weight: 6-12 parts of water-soluble humic acid, 18-48 parts of urea, 20-25 parts of water-soluble phosphate fertilizer, 22-30 parts of water-soluble potash fertilizer and 6-10 parts of trace element fertilizer; andthe preparation method comprises the following steps: carrying out a reaction between the water-soluble humic acid and urea at 100-140 DEG C to generate urea humate; and adding the remaining raw materials, stirring for 10-15 minutes at 80-100 DEG C and discharging when the mixture is hot. The water-soluble fertilizer provided by the invention has a high nitrogen utilization rate, can be applied by flushing or drop irrigation or micro-spraying, is particularly suitable for protected vegetables, and can reduce the fertilizer dosage for protected vegetables.

The invention discloses a high-nitrogen suspension-type liquid fertilizer which comprises the following components in percentage by weight: 50-80% of saturated mother solution and 20-50% of solid-liquid mixture. The saturated mother solution comprises the following components in parts by weight: 0-6 parts of potassium humate, 20-50 parts of nitrogen fertilizer, 5-20 parts of potassium fertilizer and 5-30 parts of water. The solid-liquid mixture comprises the following components in parts by weight: 5-20 parts of phosphate fertilizer, 0.2-1 part of minor element raw material, 70-100 parts of water and 5-26 parts of assistant. The suspension-type product has the advantages of excellent stability, excellent uniformity, excellent flowability, no stratification or precipitation after long time, high cost benefit and lower cost, and implements the high-concentration formula.

The invention relates to a method for smelting the high-nitrogen steel by pressurizing an electroslag furnace. The method comprises the following steps that: the content and the weight percentage of each raw material of a self-consuming combined electrode parent metal are determined; the self-consuming electrode parent metal is smelted, an alloy pipe after charged with nitro-alloy particles and a deoxidizing agent is welded on the parent metal to produce the self-consuming combined electrode which is welded on a fake electrode and is clamped on the electrode; an arc starting agent is placed into a bottom water tank below the self-consuming electrode; the slag is dried for three to ten hours and is poured into a crystal device, a smelting chamber is sealed; under the condition of nitrogen, the slag is melted with a current ranging from 1000 to 2000A; afterwards, the pressure of the smelting chamber and the cooling water are increased to be 3 to 10 MPa, the smelting is performed with a current ranging from 2000 to 6000A; when the smelting current is reduced to 1000 A, the smelting is over. The method has the advantages that the solid state arc starting slagging way and the self-consuming combined electrode are adopted to perform the smelting in an over-normal pressure sealing smelting chamber, and the problem of the prior art of uneven distribution of nitrogen in the process of preparing high-nitrogen steel is solved, thereby avoiding the remelting and saving the production cost; moreover, the technique method is simple and the smelting effect is good.

The invention relates to a medical apparatus, in particular to an anticoagulant stainless steel coronary support which is made from a high-nitrogen nickel-free austenitic stainless steel material with good blood compatibility. The support is of tubular structure with a mesh surface which is formed by orderly arranging a unit figure on the side surface of a tube along the circumference and axial direction, the primary supporting function is provided by U-shaped corrugated mesh wires extending along the axial direction, the corrugated mesh wires are connected into a whole body by soft mesh wires arranged at intervals, and the diameter of the mesh wire (width or thickness) is 40-100mum; and the surface of the support is passivated and coated with a medication. The anticoagulant stainless steel support has the advantages of good mechanical properties, good flexibility and good anticoagulant property, and can be used as a support for cardiovascular and cerebrovascular systems or a support for other cavity bodies.

The invention discloses a high-nitrogen organic suspension liquid compound fertilizer and a preparation method thereof. The high-nitrogen organic suspension liquid compound fertilizer comprises the following components by weight part: 10-17 parts of suspending agent mother liquid and 90-83 parts of nitrogenous fertilizer, phosphate fertilizer, potassium fertilizer, humic acid and trace elements; the suspending agent mother liquid comprises the following components by weight part: 2-7 parts of hydroxyethylcellulose, 1-5 parts of sodium bentonite and 6-10 parts of water. The fertilizer of the invention has good stability and uniformity and can simultaneously supply macro-elements, trace elements and organic nutrients for crops, so that the crops can absorb the macro-elements and simultaneously supplement the trace elements, and the nutrient utilization ratio is high. Because of the complete solubility and the high nutrient content of the fertilizer, the fertilizer facilitates the use ofpeasants, and the labor and the fertilizer cost are saved.

The present invention relates to medical stainless steel implant material, and is especially one kind of medical no-nickel stainless steel material. Chemically, the medical no-nickel stainless steel material includes Cr 17-24 wt%, Mn 12-20 wt%, Mo 1-3 wt%, Cu 0.5-1.0 wt%, N 0.71-1.20 wt%, C not more than 0.03 wt% and Fe for the rest. The medical no-nickel stainless steel material containing no toxic Ni element may be used in surgical implant, medical equipment, food appliance, ornament and other product contacting direct to human body, and may be also used in chemical, environment protecting and other fields.

The invention discloses a porous phosphor-nitrogen-codoped carbon material and a preparation method thereof, and belongs to the field of carbon materials. Through a chemical bonding method, phosphor atoms and nitrogen atoms are introduced into a porous carbon material so that the carbon atoms in a six-membered carbon ring of the porous carbon material are replaced by the phosphor atoms and nitrogen atoms and the functional porous carbon material is obtained. The preparation method comprises the following steps of A, preparing a polymer from a nitrogen-containing conducting polymer, a phosphorus-containing organic matter, a silicon-based hard template and a metal catalyst, B, carrying out a hydrothermal reaction process to obtain a solid 1 and calcining the solid 1 to obtain a solid 2, and C, etching the solid 2 and carrying out cleaning to obtain the porous phosphor-nitrogen-codoped carbon material. The porous phosphor-nitrogen-codoped carbon material has high nitrogen and phosphor content, a high specific surface area and a high yield. The preparation method has simple processes and can be operated easily.

The present invention relates to a method for preparing powder metallurgic nitrogen-contained / high-nitrogen stainless steel components, and comprises the following steps: raw materials preparation, forming, degreasing treatment, sintering and other static press, wherein, during the static press such as the sintering, the temperature increasing speed is 3 to 10 DEG C per minute; the sintering gas is the pure nitrogen or the mixed gas of the nitrogen, hydrogen and the argon; the pressure / partial pressure of the nitrogen is consistent with the solubility of the nitrogen in the alloy system; the sintering temperature is 1200 to 1450 DEG C, and the heat preservation period is 10 to 20 minutes; after the density is more than 90 to 95 percent, the pressure is increased to 3 to 10 MPa; the partial pressure is maintained the same during the pressure increasing process, and the pressure is distributed on the argon and the hydrogen, and the heat preservation period is 60 to 240 minutes; after the density is more than 99 percent, the pressure is decreased and rapid cooling is performed. The content of the nitrogen of the component that is made with the method hereinabove can be controlled to the highest level; the composition constitution is uniform, the density is high, the flexibility is good, the deformation is less, the precision is high and the corrosion-resistance is good.

A semi batch biological waste treatment process used to treat municipal and industrial wastes containing BOD, nitrogen and phosphorous. The process uses two biological reactors in series, with each maintaining a mixed liquor inventory. Inputs and outputs from the reactor series are performed through the addition and removal of small batches. The reactors can be configured in multiple ways for different waste conditions. The preferred embodiment is an integrated batch process that includes an anoxic equalization vessel, an aerobic biological reactor, a clarification step with denitrification, a tertiary effluent treatment phase with ozone injection and filtration and an automatic sludge wasting method with thickening and stabilization. The process has two denitrification phases and has very high nitrogen removal rates.