131 results about "Ammonia nitrogen" patented technology

This invention discloses a method for preparing high-purity zirconium oxide, belonging to the field of compound preparation technology. The method provides a breakthrough adjustment of the final concentration state and the cooling process after concentration and evaporation of an acidic zirconium oxychloride solution under the action of an oxidant. Simultaneously, crystallization is achieved through a two-stage concentration and evaporation process, followed by calcination to obtain hafnium-free zirconium oxide. The resulting zirconium oxide not only has a high yield but also high purity. Furthermore, the technical solution of this invention avoids the generation of ammonia nitrogen wastewater as in existing technologies, thus not only avoiding environmental impact but also significantly reducing production costs through the recycling of hydrochloric acid condensation, achieving a green and environmentally friendly effect.

The embodiment of the application provides a kind of multi-parameter collaborative SCR ammonia injection control method, device, equipment and medium, related to coal-fired flue gas denitration technical field, method includes: obtaining the inlet flue gas flow and inlet nitrogen oxide concentration of flue gas inlet flue, according to inlet flue gas flow and inlet nitrogen oxide concentration, calculate theoretical ammonia nitrogen molar ratio;According to theoretical ammonia nitrogen molar ratio and ammonia water concentration correction coefficient, calculate basic ammonia injection amount;Obtain the reaction data of ammonia water and flue gas in reactor, based on reaction data, dynamically adjust basic ammonia injection amount to obtain final ammonia injection amount, and adjust the ammonia injection amount of ammonia injection pipeline to final ammonia injection amount.The application can realize the accurate and efficient control of the ammonia injection amount of SCR ammonia water denitration system.

The application provides a zinc ion modified zeolite and a preparation method and application thereof. 2+ The modification of the zeolite by the zinc ion can balance the negative charge on the zeolite, so that the modified zeolite has reduced electrostatic repulsion to anions and can have more groups capable of combining with phosphates, and thus has the ability to remove phosphates. 2+ In the process of dynamically adsorbing ammonia nitrogen and phosphates in simulated and actual wastewater in a transfer station, the Thomas model is used for fitting. 2+ The adsorption capacity of the modified zeolite to the simulated water reaches 4.49 mg NH3-N / g and 3.04 mg P / g, and the adsorption capacity of the modified zeolite to the actual water reaches 2.35 mg NH3-N / g and 3.63 mg P / g. 2+ The modified zeolite has good adsorption effect on nitrogen and phosphorus in the continuous flow treatment of the actual water.

The invention discloses a synthetic ammonia nitrogen wash tail gas treatment process, and belongs to the technical field of nitrogen wash tail gas treatment.The synthetic ammonia nitrogen wash tail gas treatment process comprises the following specific steps that firstly, nitrogen wash tail gas is pressurized to 1-4 MPa and enters a mixing preheating reactor; 2, preparing alkali from a potassium hydroxide solution to 48%-60% through condensate water, increasing the pressure to 1-4 MPa, preheating, and feeding into a mixing and preheating reactor; step 3, CO in the nitrogen wash tail gas reacts with potassium hydroxide to generate potassium formate, a proper amount of formic acid is added for neutralization, and a product liquid 74% potassium formate is obtained after evaporation, or a solid potassium formate product 97% or above is obtained after evaporation concentration and spray drying; 4, H2 and N2 do not react and are separated into tail gas through pressure relief, the tail gas is condensed till P is smaller than or equal to 1.2 MPa and then returns to an ammonia synthesis system, and the tail gas serves as raw material gas to be continuously utilized after being pressurized. And through the designed filtering and compressing device, the cost of potassium formate and monopotassium phosphate is reduced, the project investment is small, and the product income is increased.

The application provides a multistage remediation method for ion-type rare earth tailing area soil composite pollution, aiming at the vertical pollution structure of "surface layer barren-mid-layer heavy metal / radioactivity-deep layer high ammonia nitrogen", and innovatively adopting a "partitioning, different quality, one layer one strategy" strategy. Specifically, the method comprises the following steps: layering and excavating 0-30cm surface layer, 30-50cm mid-layer and >50cm deep layer earthwork; mixing the deep layer earthwork with nitrogen directional conversion coupling material and composite microbial inoculant to construct an ammonia nitrogen targeted removal layer; mixing the mid-layer earthwork with porous matrix coupling stabilizer and functional microbial inoculant to form a heavy metal / radioactivity stable layer; mixing the surface layer earthwork with composite soil conditioner to build a soil improvement layer; and finally planting heavy metal resistant plants. Through the "special material-functional flora-vertical coordination" trinity design, the method realizes accurate, efficient and radical remediation of the whole profile, and avoids resource waste and secondary disturbance.

This invention discloses a method for SCR denitrification control of sintering flue gas based on operational cost optimization, comprising the following steps: S1, establishing an equation for the required heating gas flow rate for SCR denitrification of sintering flue gas based on actual production performance; S2, establishing an ammonia-nitrogen molar ratio model based on SCR denitrification production data of sintering flue gas; S3, obtaining the ammonia consumption based on the ammonia-nitrogen molar ratio model; S4, establishing an SCR denitrification operating cost equation based on the ammonia consumption and heating gas flow rate; S5, optimizing the SCR reaction temperature based on the SCR denitrification operating cost equation, and obtaining the optimized heating gas flow rate and ammonia consumption accordingly; S6, controlling the SCR denitrification of sintering flue gas based on the optimized data from S5. This invention calculates the lowest-cost heating gas and ammonia injection rates based on the actual operating data of the sintering flue gas SCR denitrification device, thereby achieving optimal SCR denitrification operating costs.

This invention relates to the field of operation and maintenance service management technology, and discloses a method and system for operation and maintenance service management of biogas slurry resource utilization, including: Step 1, establishing batch sampling and actual measurement, establishing a plot table, and obtaining nitrogen deficit; Step 2, calculating volume, intensity, and acidification dosage according to the parameter table, locking the process, and generating a prescription list; Step 3, using capacity and safety margin constraints for loading, segmenting by particle size, calculating weights, and locking the scheduling table; Step 4, acidifying and mixing thoroughly and verifying to the target pH, weighing and verifying again upon delivery, issuing a metering slip and shipping; Step 5, retesting pH and ammonia nitrogen to verify the prescription, and if qualified, the on-site parameters are read-only; Step 6, applying at a constant rate according to the prescription, reconciling dual-track metering, and recording faults for exceeding tolerances; Step 7, calculating the loss rate based on delivery, dual-track, and on-site actual measurement, comparing with thresholds for correction, and calculating the achievement rate of the three items. This invention realizes deterministic scheduling, unified metering standards, and traceable closed-loop management of biogas slurry throughout the entire process from delivery to soil application.

The invention discloses an advanced treatment method of manganese residue leachate, which comprises the following steps: mixing the manganese residue leachate and hydrogen peroxide, stirring, adjusting the pH value of the system to be greater than or equal to 11, adding carbonate for precipitation reaction, stirring, adding a flocculant for flocculation reaction, filtering, and sequentially performing ultrafiltration treatment, cyclic ammonia nitrogen removal treatment, cyclic absorption and evaporative crystallization on the filtrate, an ammonium sulfate product is obtained. Compared with a conventional method, the advanced treatment method for the manganese residue leachate can efficiently and thoroughly remove metal ions and ammonia nitrogen in the manganese residue leachate, meanwhile, an ammonium sulfate product with high purity can be obtained, the purity exceeds 98%, resource utilization of the ammonia nitrogen can be achieved, and the method is suitable for industrial production. The method has the advantages of simple process, low treatment cost, high treatment efficiency, good metal ion removal effect, high ammonia nitrogen recovery rate, high ammonium sulfate purity and the like, and is high in use value and good in application prospect.

The present application relates to a kind of sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier and its preparation method and application, belong to water deep processing field.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier includes matrix material and active material distributed in the inside and / or at least part of surface of the matrix material;The matrix material includes elemental sulfur and sulfur compound;The active material includes basic magnesium-containing compound and / or mineral containing basic magnesium-containing compound.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier has the ability of easy-to-use sulfur form by denitrification process and automatic adjustment system pH value, realizes deep denitrification and nitrogen removal, and the dissolved magnesium ion is transported into cell by improving ammonia nitrogen efficiency and forms phosphate precipitate, and the carrier is endowed with the function of efficient removal of ammonia nitrogen and phosphate.The sulfur-based basic magnesium-containing functional material provided by the present application is applied to deep processing or ecological buffer zone and other scenes, and can realize the coordinated deep removal of nitrate nitrogen, ammonia nitrogen and phosphate, and has wide application prospect.

The invention belongs to the technical field of pathogenic bacterium wastewater treatment, and particularly relates to a method capable of effectively and synergistically removing ammonia nitrogen and pathogenic bacteria in wastewater. According to the method, in a water body in which ammonia nitrogen and pathogenic bacteria coexist, the two pollutants are removed at the same time by utilizing the oxidation-sterilization synergistic effect of Fe (VI) / PAA. Pollutant ammonium nitrogen in the oxidation system serves as a resource to participate in removal of pathogenic bacteria, the existence of ammonium nitrogen promotes generation of intermediate oxidation products Fe (IV) and Fe (V) of potassium ferrate, then the oxidation inactivation capacity of the system is enhanced, the inactivation time of the pathogenic bacteria in wastewater is effectively shortened, meanwhile, nitrogen is converted into nitrogen, nitrate and the like, the removal rate of NH4 < + > within 30 min reaches 98.6%, and the removal rate of potassium ferrate reaches 98.6%. The total nitrogen removal rate reaches 97.2%, pathogenic bacteria inactivation and ammonium salt removal are carried out at the same time, and a new thought and technology are provided for removing pathogenic bacteria and ammonium salt in water treatment.

The application provides a method for treating Fuling preserved vegetable wastewater by adding alkali-treated diatomite minerals into the Fuling preserved vegetable wastewater; or a method for treating Fuling preserved vegetable wastewater by adding untreated diatomite minerals into the Fuling preserved vegetable wastewater, carrying out solid-liquid separation after a period of reaction, filtering out the solid part, and then adding alkali-treated diatomite minerals into the liquid part. The method can effectively adjust the pH value of the Fuling preserved vegetable wastewater, reduce the content of ammonia nitrogen in the Fuling preserved vegetable wastewater, and improve the purity of the diatomite minerals. The method for treating Fuling preserved vegetable wastewater has the advantages of simplicity, feasibility, low operation cost, and no potential environmental threat, and is a green and environmentally-friendly treatment method, which can effectively improve the treatment effect of the Fuling preserved vegetable wastewater.

The invention relates to the technical field of biological treatment of urban domestic sewage, in particular to a stable deep denitrification method for aerobic granular sludge based on a reactor, which is characterized in that the reactor is operated by adopting a gradient water inlet mode combined with a dissolved oxygen regulation and control strategy, that is, short-time rapid water inlet is applied before slow water inlet to create an unbalanced external carbon source supply condition; internal carbon source storage and enrichment of slow-growing microorganisms such as phosphorus-accumulating bacteria and glycogen-accumulating bacteria are promoted, so that the stability of the particle structure is enhanced; the dissolved oxygen of the reactor main body is gradually reduced to 2 mg / L so as to reduce the inward permeation of the dissolved oxygen, increase the internal anaerobic zone and improve the denitrification rate, and meanwhile, a transient high oxygen exposure condition is set at the tail end of the aerobic stage so as to form high hydraulic shear force to further maintain the stability of the particles. The structure regularity, the mechanical strength and the denitrification performance of the aerobic granular sludge are remarkably improved, the average removal rate of ammonia nitrogen and the average removal rate of total nitrogen are stabilized at 97.84% and 88.87% or above respectively, the synchronous nitrification endogenous denitrification efficiency reaches 92.10% or above, and long-term stable operation of the system is guaranteed.

The present application belongs to the field of waste resource utilization and hydrometallurgy, and particularly relates to a method for preparing vanadium pentoxide by using organic amine flue gas desulfurization residue, which adopts melamine method flue gas desulfurization residue as a vanadium precipitation agent. Under acidic conditions, the organic amine flue gas desulfurization residue can react with vanadate to generate more stable organic amine vanadate precipitate. After filtration, the precipitate is high-temperature calcined to obtain high-purity powder vanadium pentoxide. Compared with the current ammonium sulfate salt vanadium precipitation method, the present application has higher precipitable vanadium concentration, low ammonia nitrogen concentration in wastewater, and no need for heating in the reaction process, and is an environmentally friendly and low-cost vanadium pentoxide preparation technology.

The utility model relates to a system for treating high-ammonia-nitrogen wastewater and recycling ammonia water resources by utilizing a low-temperature heat source, which comprises a steam stripping tower, a high-ammonia-nitrogen wastewater treatment device, a high-ammonia-nitrogen wastewater treatment device and a low-temperature heat source, the air blower is connected with the middle part of the steam stripping tower; the first heat exchanger exchanges heat with the material discharged from the bottom of the steam stripping tower through a production area low-grade heat source, and the material discharged from the bottom of the steam stripping tower after heat exchange flows back to the top of the steam stripping tower; a material discharged from the top of the steam stripping tower flows into the first spraying absorption tower from the bottom of the first spraying absorption tower; a material discharged from the top of the first spraying absorption tower flows into the second spraying absorption tower from the bottom of the second spraying absorption tower; a material discharged from the top of the second spraying absorption tower flows into the falling film absorption tower from the bottom of the falling film absorption tower. According to the utility model, a low-grade heat source is utilized, and the produced ammonia water can be used in a flue gas denitration process at a production end, so that the cost for ammonium salt treatment caused by acid absorption is avoided.

The present invention pertains to a water treatment method comprising: a biological treatment step for biologically treating water to be treated in which ammoniacal nitrogen is dissolved in a biological treatment tank (10); a first measurement step in which a part of the water to be treated, which has flowed into the biological treatment tank (10), is flowed into a first measurement tank (24), ammonia nitrogen dissolved in the water to be treated is transferred in the form of ammonia gas to a gas phase part of the first measurement tank (24) under alkaline conditions, and the ammonia gas concentration (C1) is measured; a second measurement step in which a portion of the treated water that has been biologically treated in the biological treatment tank (10) is caused to flow into a second measurement tank (32), ammonia nitrogen dissolved in the treated water is transferred in the form of ammonia gas to a gas phase part of the second measurement tank (32) under alkaline conditions, and the ammonia gas concentration (C2) is measured; and a control step for controlling the operating conditions of the biological treatment step on the basis of the ammonia gas concentration (C1) and the ammonia gas concentration (C2).

The invention relates to cold-resistant pseudoarthrobacter LH-LT-1 resistant to heavy metal stress and low temperature as well as a microbial agent and application thereof, and belongs to the technical field of microorganisms. The cold-resistant pseudoarthrobacter LH-LT-1 is classified and named as Pseudarthrobacter psychrotolerans, and the preservation number of the cold-resistant pseudoarthrobacter LH-LT-1 is CGMCC (China General Microbiological Culture Collection Center) No. 32708. The cold-tolerant pseudoarthrobacter LH-LT-1 can amplify gene sequences of ammonia monooxygenase, hydroxylamine oxidoreductase and the like based on gene primers of amoA, hao and the like, and can amplify gene sequences of cold shock protein, cold shock protein, ATP binding protein, excision nuclease and the like based on gene primers of Csp4, cspA II, atpH, uvrC and the like. The strain can tolerate multiple heavy metal ions such as Pb < 2 + >, Ni < 2 + > and Cd < 2 + >, can efficiently reduce ammonia nitrogen under the stress of cadmium ions at 5 DEG C, and provides an efficient and low-cost biological solution for reducing ammonia nitrogen in sewage and wastewater at low temperature of 5 DEG C under the stress of a series of heavy metals represented by cadmium.

The application relates to a copper-doped ionic COF material Cu@TVPT-COF, a preparation method thereof and application thereof in electrochemical nitrate reduction. N,N'-disubstituted-4,4'-bipyridine cation salt is mixed with 2,4,6-tris(4-aminophenyl)-1,3,5-triazine, and after freeze-thaw-circulating degassing, reaction is carried out, and after washing and drying, TVPT-COF is obtained. Copper sulfate and TVPT-COF are dissolved in tetrahydrofuran, and reaction is carried out in a high-pressure reaction kettle. After centrifugal collection of the precipitate, washing and drying, Cu@TVPT-COF is obtained. The application obtains a COF material which is convenient to synthesize, stable in structure and good in catalytic performance. The material is prepared into a reduction electrode. The electrode is used for electrocatalytic nitrate reduction to produce ammonia, reaches 95.92% of the Faraday efficiency at-0.5V vs.RHE, reaches the highest ammonia nitrogen yield of 202.97mmol h ‑1 g ‑1 , and has excellent catalytic activity in nitrate reduction. The application has a wide application prospect in the field of catalysis.

The invention provides a steam stripping purified water separation and quality-divided recycling method and system.The method comprises the steps that a separation membrane with the organic pollutant separation efficiency not lower than 90% and the membrane flux not lower than 20 LMH is selected; separating the steam stripping purified water by adopting a separation membrane to obtain organic pollution control produced water and inorganic pollution control produced water; the TOC concentration in the organic pollution control produced water is not more than 10 mg / L, the pH value of the inorganic pollution control produced water is 6.5-8.5, the suspended matter and the total hardness are not more than 5 mg / L and 140 mg / L respectively, and the sulfide concentration and the ammonia nitrogen concentration are not more than 20 mg / L and 50 mg / L respectively; the organic pollution control produced water and the inorganic pollution control produced water are respectively recycled as production water of different oil refining devices. According to the invention, the collection, precise separation and quality-based recycling of the steam stripping purified water can be realized, the treatment and recycling ways of the steam stripping purified water can be increased, and the resource utilization efficiency of the steam stripping purified water can be improved to the maximum extent.

The application provides a preparation method of a catalytic cracking catalyst, which comprises the following steps: forming a NaY molecular sieve filter cake layer, and then loading Y type molecular sieve exchanged by ammonia-nitrogen wastewater on the NaY filter cake, so as to recover the excess ammonium ions in the ammonia-nitrogen wastewater through the basic characteristics of the NaY filter cake layer and the ammonium ion adsorption characteristics of the NaY molecular sieve; meanwhile, the excess ammonium ions can also exchange part of Na of the NaY molecular sieve in the recycling process of the excess ammonium ions in the NaY molecular sieve layer + , effectively removing Na + of the NaY molecular sieve layer, and recycling the ammonium ions lost in the ammonia-nitrogen wastewater through the adsorption and ion exchange of the NaY molecular sieve. The humic acid added in the NaY molecular sieve slurry is a multi-element organic complex, which is dissolved in the NaY molecular sieve system to form sodium humate, and the sodium humate can limit the migration of the ammonium ions in the filtrate through adsorption and exchange, so as to inhibit the loss of the ammonium ions with the filtrate.

The application relates to a kind of water bloom judging methods based on spatial mining, comprising: in the real-time collection of water body data of N regions of water area respectively deploying sensor, wherein N is the integer greater than 1, the water body data includes: environmental parameter water temperature, PH, turbidity, dissolved oxygen, conductivity, high salt index, ammonia nitrogen, total phosphorus and total ammonia;The sensor deployed in the region to be measured in water area is regarded as target sensor, and the sensor deployed in the remaining region in water area is regarded as remaining sensor;The water body data collected by all remaining sensors is sequentially arranged to form remaining water body data sequence;The water body data collected by remaining sensor and remaining water body data sequence are input into trained water bloom judging model to predict whether water bloom occurs in the region to be measured in water area, improve the accuracy of water bloom judgment, improve the timely adoption of emergency measures by environmental management department, reduce the ecological harm and health risk brought by water bloom.

The utility model discloses nitric acid pickling copper wastewater total nitrogen removal equipment which comprises an air stripping tower main body and an exhaust chimney, and the exhaust chimney is fixedly mounted at the top of the air stripping tower main body; the efficient removal assembly comprises a PH adjusting heating tank, a header pipe, a spraying circulating pipe, a drainage pipe, a first filler layer, a second filler layer and a centrifugal fan, the PH adjusting heating tank is arranged at the side part of the air stripping tower main body, the header pipe is arranged at the top of the PH adjusting heating tank, the header pipe is connected with the spraying circulating pipe in a grading manner, and the drainage pipe is connected with the spraying circulating pipe. A drainage pipe is fixedly inserted into the bottom of the spraying circulating pipe, a first filler layer and a second filler layer are fixedly mounted in the air stripping tower main body, and the side part of the air stripping tower main body is fixedly connected with an air outlet end of a centrifugal fan. According to the device disclosed by the utility model, free ammonia dissolved in wastewater can pass through a gas-liquid interface and is transferred to a gas phase, so that the aim of deeply removing ammonia nitrogen and total nitrogen is fulfilled.

A method for denitrifying ammonia nitrogen wastewater containing chlorine-oxygen free radicals is disclosed. The method uses ruthenium dioxide / titanium dioxide (RuO2 / Ti) as the anode and mesoporous carbon-modified carbon paper (CMK-3 / CP) as the cathode. Sodium sulfate, sodium chloride, and iron-modified graphene oxide as the particle electrode are added to the container containing ammonia nitrogen wastewater, forming a dual-electrode and particle-electrode electrochemical ammonia nitrogen denitrification system. Oxygen is then introduced into the cathode region, and the electrolysis current density is controlled to achieve denitrification of the ammonia nitrogen wastewater. This invention utilizes RuO2 / Ti to oxidize chloride ions to active chlorine (ClO2). ‑ Simultaneously, oxygen is reduced to hydrogen peroxide through mesoporous carbon-modified carbon paper, and the generated active chlorine and hydrogen peroxide are enriched in iron-modified graphene oxide particles. The hydrogen peroxide is further absorbed by the Fe atoms in the iron-modified graphene oxide particles. 2+ / Fe 3+ The cyclic catalytic process generates HO•, which can react with active chlorine to generate ClO•. ClO• can selectively oxidize ammonia nitrogen to nitrogen gas, generating high steady-state concentrations of chloroxygen free radicals, thus achieving efficient denitrification treatment of ammonia nitrogen wastewater.

The invention relates to a low-green-coke heavy oil catalytic cracking catalyst and a preparation method thereof. The catalyst comprises the following components in percentage by weight: 15%-40% of a zirconium-titanium modified Y-type molecular sieve, 10%-30% of a mesoporous cerium oxide matrix, 20%-50% of clay and 5%-15% of an aluminum oxide binder, wherein the zirconium-titanium modified Y-type molecular sieve is prepared through treatment of an organic acid-ionic liquid mixed solution, the cell constant of the molecular sieve is 2.425-2.445 nm, and the ratio of B acid to L acid is larger than or equal to 1.5. The preparation method comprises the following steps: (1) mixing a NaY molecular sieve with a zirconium source and a titanium source, modifying with an ionic liquid, and carrying out a hydrothermal reaction; (2) carrying out acid exchange by using a citric acid-choline ionic liquid solution to obtain a modified molecular sieve; and (3) pulping and molding the modified molecular sieve, mesoporous cerium oxide, clay and a binder, and carrying out gas-phase silanization treatment and roasting. The coke yield of the catalyst is reduced by 15-30%, the heavy oil conversion rate is improved by 8-12%, the wear index of the catalyst is less than or equal to 3.0%, and no ammonia nitrogen is discharged in the preparation process.

The invention discloses a preparation method of a photocatalyst combining a coconut shell carbon-based organic photovoltaic material loaded photocatalyst and a palladium-based catalyst. The method comprises the following steps: A, cleaning, drying and crushing coconut shells; b, performing high-temperature pyrolysis on the coconut shell powder in a tubular furnace to obtain coconut shell carbon particles; c, mixing the organic photovoltaic material with chloroform; d, uniformly coating the coconut shell carbon particles with the mixed solution; e, adding the mixed solution into a polyethylene glycol solution, and drying to obtain the coconut shell carbon-based loaded organic photovoltaic material photocatalyst, and F, uniformly mixing the photocatalyst with a palladium-based catalyst to obtain the photocatalyst. The photocatalyst obtained by combining the two catalysts can efficiently and quickly remove ammonia nitrogen compounds, heavy metal ions and bacteria in an aquaculture wastewater environment at the same time, and can be repeatedly utilized, so that the problems of a photocatalyst loading process and cyclic utilization are solved; and a real green, environment-friendly and pollution-free treatment method is provided for the breeding wastewater.

The invention relates to the technical field of organic waste treatment and fertilizers, and discloses an enzyme-method rapidly-fermented organic fertilizer and a fermentation method thereof, the organic fertilizer is composed of a fermented and decomposed organic matter and a functional composite carrier; the functional composite carrier takes porous biochar as a substrate, and a surface chemical modification layer for chemically immobilizing ammonia nitrogen, a biomimetic catalytic center for catalytically degrading lignocellulose and a slow-release enzyme / spore capsule for regularly releasing bioactive substances are compounded on the porous biochar. The fermentation method comprises the following steps: mixing the functional composite carrier with organic wastes, and carrying out aerobic fermentation under a film-coated oxygen control condition. According to the invention, through the synergistic effect of chemical nitrogen fixation, chemical catalysis and biodegradation, the technical problems of easy volatilization loss of nitrogen and slow degradation of lignocellulose in traditional fermentation are solved, and the purposes of shortening of the fermentation period, efficient maintenance of nitrogen nutrients and improvement of the decomposition degree of a final product are achieved.

This invention discloses a technical method for alleviating ammonia inhibition during the high-temperature aerobic digestion process of organic solid waste. The method involves reacting fulvic acid with a mixture mainly containing Cu... 2+ Mn 2+ Fe 2+ The enzyme-catalyzed solutions of ions were mixed to prepare a conditioning mother liquor, which was then added to the high-temperature aerobic digestion system for organic solid waste in a specific ratio. The total ammonia nitrogen concentration in the digestate was monitored, and when it rose to 800 mg / L... ‑1 In this process, soluble magnesium salts and phosphogypsum slurry are sequentially added to the treatment system of wet organic solid waste. Heavy magnesium oxide is intermittently added to adjust the pH of the digestion system to 8.0-9.0, and high-temperature aerobic digestion is continued. Then, a silicate nitrogen-fixing agent is added to the digestion system. This invention combines the principles of enhancing oxidase activity with ammonia nitrogen precipitation, adsorption, and ion exchange to alleviate ammonia inhibition during the high-temperature aerobic digestion of wet organic solid waste through multiple pathways. After stabilization treatment, the solid residue obtained from solid-liquid separation has a high degree of humification and nitrogen content, making it suitable for subsequent substrate utilization.

The present disclosure provides a method of processing a liquid containing ammonia nitrogen from a first semiconductor fabrication machine. The method includes: adsorbing a plurality of ammonium (NH4+) ions in the liquid; desorbing the plurality of NH4+ ions to a solution; converting a fraction of the plurality of NH4+ ions into a plurality of ammonia (NH3) molecules; and electrolyzing the plurality of NH3 molecules to become a plurality of hydrogen (H2) molecules and a plurality of nitrogen (N2) molecules.

The application discloses a method for detecting compound fertilizer by using liquid chromatography, and belongs to the technical field of fertilizer analysis and detection. In the method, hydrochloric acid solution is mixed with a fertilizer sample, ultrapure water is added, and effective phosphorus, potassium oxide, ammonia nitrogen and nitrate nitrogen are extracted after slight boiling, and the contents are determined by using liquid chromatography; meanwhile, ultrasonic waves are used to extract water-soluble phosphorus, chlorine ions and magnesium ions when the contents of the water-soluble phosphorus, the chlorine ions and the magnesium ions are determined. The liquid chromatography and the special analysis technology thereof can shorten the analysis time of the nutrients of the compound fertilizer to less than one hour, the accuracy of the single nutrient determination result basically reaches the allowable difference value specified in the national standard analysis method, and therefore, the rapid and accurate analysis of the nutrients of the compound fertilizer is realized.