263 results about "Ammonia nitrogen" patented technology

The invention discloses a preparation method and application of a ternary multifunctional three-dimensional framework mediated high ammonia nitrogen selectivity polyamide reverse osmosis membrane, and belongs to the technical field of membrane separation. The method comprises the following steps: 1, preparing a high-molecular copolymer; 2, preparing a polysulfone support layer by adopting a non-solvent induced phase inversion method; 3, preparing a polyamide reverse osmosis membrane by adopting an interfacial polymerization method; and 4, preparing the polyamide reverse osmosis membrane with high ammonia nitrogen selectivity. Through reasonable design of the structure and distribution of the group of the ternary multifunctional three-dimensional structure high-molecular copolymer, the copolymer can react with the acyl chloride group on the surface of the polyamide active layer to form a covalent amido bond, and the covalent amido bond is anchored on the surface of the polyamide layer in situ to construct the functional layer. The functional layer not only can significantly improve the surface potential of the membrane, but also can increase the inherent concentration of ammonia nitrogen on the surface of the membrane, thereby increasing the diffusion resistance, finally realizing the repulsive force to the ammonia nitrogen, and improving the interception capability of the grafted membrane to the ammonia nitrogen. The operation process is simple and mild, the whole membrane preparation process is not changed, and industrialization is easy.

The invention discloses an ammonia nitrogen detection system and an application method thereof, and ammonia nitrogen detection test paper, the ammonia nitrogen detection system is prepared by the following steps: step SA1) preparing a dipping mixed solution, the dipping mixed solution comprises: a potassium sodium tartrate solution with a concentration of 3-60 g / L; a sodium salicylate solution with a concentration of 20-320 g / L; the concentration of the sodium nitroprusside solution is 0.1 to 0.8 g / L; and deionized water. On the basis of the principle of salicylic acid-pypocholoride spectrophotometry, the impregnated test paper, the reagent tube and the standard colorimetric card are combined, and the rapid ammonia nitrogen detection system special for medium-concentration sewage detection is successfully developed. The toxicity problem of mercury iodide in a Nessler reagent method and the toxicity problem of phenol in a phenol-pypocholoride spectrophotometric method are avoided, main reagents are non-toxic and harmless to a human body, interference of metal ions in a water sample can be effectively eliminated by adopting sodium potassium tartrate tetrahydrate as a chelating agent, and the detection stability and accuracy are improved.

The invention discloses a water quality monitoring method and monitoring system for a blue crab culture system, and relates to the field of aquaculture. Comprising the following steps that the dissolved oxygen concentration is calculated through light source irradiation and light intensity data collected by an optical sensor, and a result is corrected according to water temperature and pressure. Further obtaining the content of chemical parameters such as ammonia nitrogen and nitrite, and calculating the chemical index of water quality. Meanwhile, on the basis of the light intensity, the refractive index of suspended particles and the average diameter, the mixing degree is represented, the conductivity is detected, and the ecosystem health index is generated. A water quality comprehensive evaluation coefficient is obtained through comprehensive analysis and compared with a water quality evaluation threshold value, different water quality evaluation instructions are generated, the water quality condition of the aquaculture water source is comprehensively evaluated, and the aquaculture environment health is ensured. The automation and intelligence level of aquaculture water monitoring is improved, risks in the aquaculture process can be reduced, and the growth speed and quality of aquaculture objects such as blue crabs are improved.

The invention belongs to the field of novel internal combustion engines, and relates to a marine ammonia catalytic hydrogen production system and a control method, the marine ammonia catalytic hydrogen production system comprises an ammonia catalytic hydrogen production reaction system and an ammonia-hydrogen mixing ratio control system, and the marine ammonia catalytic hydrogen production system comprises an ammonia fuel tank, a gasifier, a flue gas waste heat heater, an ammonia catalytic reactor, a cooler and an ammonia-hydrogen buffer tank, the system comprises a temperature sensor, a pressure sensor, a flow sensor, a knock sensor, a rotating speed sensor, a crankshaft position sensor, an ammonia nitrogen hydrogen ratio ultrasonic online tester, a digital signal processor, a flow and pressure regulating valve actuator, a power supply circuit and a PC (Personal Computer). An ammonia fuel direct channel at an inlet of the internal combustion engine is added; a flow valve actuator at an inlet of a flue gas waste heat heater, an ammonia fuel direct channel flow valve actuator and a pressure valve actuator at an inlet of an engine are controlled in real time through a digital signal processor according to a detection result of a flow and ammonia nitrogen hydrogen ratio ultrasonic online tester so as to meet the working condition requirements of an internal combustion engine; the preset ammonia-hydrogen mixing ratio of the internal combustion engine is achieved by adjusting the reactor temperature and supplying ammonia fuel.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a treatment method of high-concentration ammonia-nitrogen wastewater. The treatment method comprises the following treatment steps: (1) pretreatment of high-ammonia-nitrogen wastewater: adding an acidic solution into to-be-treated high-ammonia-nitrogen wastewater, adjusting the pH value of the system to 3 or below, then adding a regulating agent NaNO2, and uniformly mixing; and (2) high-temperature hydrothermal treatment: putting the mixed wastewater pretreated in the step (1) into a closed hydrothermal reactor, heating to 120-180 DEG C, carrying out high-temperature hydrothermal reaction, cooling after the reaction is completed, obtaining treated produced water, and collecting produced nitrogen. According to the treatment method, the hydrothermal reaction is regulated and controlled based on cooperation of acid and sodium nitrite, the method is carried out under high-temperature and high-pressure conditions, the reaction rate can be increased, the treatment time can be shortened, and the treatment efficiency can be improved. The problems that in an existing high-ammonia-nitrogen wastewater treatment technology, the ammonia nitrogen treatment concentration is low, the process technology is complex, and secondary pollution is generated are solved.

The invention discloses an electrode material for electrocatalytic degradation of organic wastewater containing high-concentration nitrate and application of the electrode material, a copper salt precursor solution and a tin salt precursor solution are sequentially attached to the surface of a Ti plate, so that a Ti / Cu-Sn multi-metal coating electrode material is obtained, the Ti / Cu-Sn multi-metal coating electrode material is used as a cathode, a metal electrode is used as an anode to construct an electrolytic tank, and the high-concentration nitrate-containing organic wastewater is obtained. The catalyst is used for simultaneous degradation of NO3 <-> and COD in organic wastewater containing high-concentration nitrate and co-production of hydrogen. The electrode material is simple in preparation process, low in cost and high in catalytic activity and stability, nitrate and organic matter in wastewater can be safely, mildly and simultaneously removed in the electrolysis process of the electrode material, and secondary pollution byproducts such as ammonia nitrogen and nitrite are hardly generated. Tests show that the removal rate of nitrate radicals can reach 99.72%, the removal rate of COD (Chemical Oxygen Demand) can reach 84.61% and the selectivity of nitrogen can reach 99.83% when the method is used for treatment.

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 invention belongs to the technical field of electro-catalysis, and particularly relates to a perylene-based composite material electrode with Ni loaded on carbon cloth and application of a preparation method of the perylene-based composite material electrode in electro-catalysis nitrate reduction. The preparation method comprises the following steps: dissolving perylene-3, 4, 9, 10-tetracarboxylic dianhydride, imidazole and 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine in DMF (Dimethyl Formamide), continuously refluxing for 48 hours under the condition of stirring at 180 DEG C, repeatedly cleaning with DMF, and drying to obtain a perylene-based material; the preparation method comprises the following steps: dissolving nickel nitrate hexahydrate, thiourea and a perylene-based material in tetrahydrofuran (THF), reacting at 160 DEG C for 24 hours, centrifuging, washing and drying to obtain the perylene-based composite material of Ni, which is stable in structure, convenient to synthesize and good in catalytic performance. The composite material is prepared into printing ink, carbon cloth is coated with the printing ink, a reduction electrode is prepared, the electrode is used for electro-catalysis of nitrate radicals, the Faraday efficiency is 31.49% under-1.2 V v.s.RHE, the ammonia nitrogen yield is up to 357.70 mmol h <-1 > g <-1 >, and the electrode has excellent nitrate radical reduction catalytic activity.

The present invention relates to the technical field of wastewater treatment, and in particular to a detection device and method for measuring anaerobic ammonium oxidation activity. The detection device comprises a reactor and a detector; the reactor comprises a first reaction chamber and a second reaction chamber; the first reaction chamber is used for an anaerobic ammonium oxidation reaction and a denitrification reaction of sludge to be tested; the second reaction chamber is used for a denitrification reaction of said sludge; and the detector is used for controlling and recording the flow rates of chemicals entering the first reaction chamber and the second reaction chamber, ensuring that the pH values of the first reaction chamber and the second reaction chamber are constant and the same. According to the device, the real-time activity and maximum activity of anaerobic ammonium oxidation can be obtained on the basis of the hydrogen ion consumption rate in the reaction process, avoiding the cumbersome process of continuously sampling and measuring the concentration of ammonia nitrogen or nitrite in a conventional method, and simplifying the operation process; the first reaction chamber and the second reaction chamber of the detection device use the same sludge as a control, and the interference caused by the denitrification process using endogenous organic matter as an electron donor is eliminated, improving the measurement precision.

The invention provides an accurate determination method applied to ammonia nitrogen in a complex water body, which comprises the following steps: adding a proper amount of ethylenediamine tetraacetic acid, silver nitrate, sodium potassium tartrate tetrahydrate and an indicator into a complex water body sample, carrying out primary heating distillation, adding a proper amount of sodium thiosulfate and an indicator, and carrying out secondary heating distillation; the method comprises the following steps: preparing ammonia nitrogen standard solutions with different ammonia nitrogen contents, combining with a Nessler reagent to determine absorbance, drawing a standard curve of mass and absorbance, finally detecting a sample to be detected after secondary distillation by the same method, determining absorbance, and obtaining the corresponding ammonia nitrogen content from the standard curve. According to the method, an appropriate masking agent is selected to be matched with a secondary distillation process, interference of urea, volatile amine, chloramine, sulfide, heavy metal and the like contained in the complex water body sample on ammonia nitrogen determination is masked, an appropriate mixed absorption liquid is selected, accurate determination of ammonia nitrogen in the complex water body is achieved, and the method has good precision and accuracy and is suitable for large-scale popularization and application. The application value is high.

The invention relates to electrochemical treatment of nitrate wastewater, in particular to a preparation method and application of an atomic-scale dispersed copper and cobalt bimetallic catalyst. Comprising the following steps of (1) a Cu precursor preparation method, (2) a Co precursor preparation method, (3) high-temperature pyrolysis and (4) a redundant metal component removal method. The atomic-scale dispersed copper and cobalt bimetallic catalyst disclosed by the invention has relatively high metal loading capacity and relatively high stability. When the Cu-Co-N-C catalyst is applied to the nitrate electroreduction reaction, the toxic by-product nitrite is obviously reduced, the conversion rate of nitrate is obviously improved, and the ammonia nitrogen selectivity is obviously improved.

The invention discloses a mixed matrix membrane for ammonia separation and a preparation method thereof, polyether block polyamide (Pebax) rich in ether bonds and a liquid adsorbent are dissolved in a solvent, reflux stirring is performed to obtain a membrane casting solution, then the membrane casting solution is coated on a substrate, the solvent is heated to volatilize, and the final mixed matrix membrane is obtained. Benefited from the strong ammonia gas affinity of the Pebax polyether chain segment and the liquid adsorbent, the obtained mixed matrix membrane has an efficient ammonia separation effect, and when the mixed matrix membrane is used for separating synthesis ammonia residual gas, the ammonia permeability can reach 2656.9 Barrer, and the ammonia / nitrogen selectivity and the ammonia / hydrogen selectivity reach 594.1 and 150.8 respectively.

The invention relates to the technical field of microorganisms, in particular to a low-temperature-resistant denitrification strain and application thereof in a recirculating aquaculture system. The nitrogen removal bacterial strain is halomonas piezotolans YX98, and the preservation number of the halomonas piezotolans YX98 is CCTCC (China Center for Type Culture Collection) NO: M 20242820. The strain YX98 has an efficient denitrification function and also has the characteristics of low temperature resistance and halophile. The strain is inoculated into simulated wastewater with the temperature of 15 DEG C and the salinity of 20% o, and the degradation rates of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are as high as 96.15%, 98.20% and 99.99% respectively; when the strain is applied to a salmon and trout circulating mariculture system as a low-temperature fungicide, the NH4 < + >-N and NO2 <->-N degradation function of a moving bed bio-membrane reactor can be enhanced, so that the duration of a function starting period is shortened by 43.75%, and the duration of a function stable period is shortened by 26.32%.

The invention relates to an ammonia nitrogen adsorption type MABR membrane material as well as a preparation method and application thereof. The ammonia nitrogen adsorption type MABR membrane material comprises a porous supporting layer and a membrane layer which is located on the surface of the porous supporting layer and has an ammonia nitrogen adsorption function, the membrane layer contains functional groups, and the functional groups are one or more of hydroxyl, amino or epoxy groups. The membrane layer containing specific functional groups is introduced to the surface of the porous supporting layer, on one hand, the functional groups in the membrane layer can interact with ammonia nitrogen through Van der Waals force, electrostatic interaction, hydrogen bonds and the like, physical adsorption of the ammonia nitrogen is achieved, the ammonia nitrogen is promoted to approach the surface of the MABR membrane, and therefore the ammonia nitrogen is effectively adsorbed near the surface of the membrane; convenient conditions are provided for subsequent treatment; on the other hand, the biocompatibility of the membrane surface can be improved, attachment and growth of microorganisms are promoted, the oxidation process of the membrane surface biological membrane on ammonia nitrogen is further enhanced, and the treatment effect of the ammonia nitrogen is effectively improved through the synergistic effect.

The invention discloses a copper particle catalyst electrode containing abundant dislocation defects and a preparation method and application thereof, and the preparation method comprises the following steps: (1) dissolving tungstate, copper salt and urea in water, stirring and mixing; (2) putting the solution into a hydrothermal kettle for hydrothermal reaction, and then washing and drying solid powder obtained by the reaction; (3) calcining the solid powder in air to obtain CuWO4 powder; (4) loading CuWO4 powder on an electrode substrate to prepare a working electrode; and (5) performing electrochemical reduction on the working electrode to obtain the copper particle catalyst electrode containing rich dislocation defects. The defect sites of the electrode can regulate and control the electronic structure of copper, construct low-coordination copper and enhance the binding capacity to nitrogen intermediate products, so that nitrite accumulation is reduced, and the reaction activity and ammonia nitrogen selectivity are improved.

The invention discloses zeolite ceramsite for advanced treatment of ammonia-nitrogen wastewater and a preparation method and application thereof, and relates to the field of ammonia-nitrogen wastewater treatment.The preparation method comprises the steps that 1, acidified fly ash, phosphate tailings and montmorillonite are mixed, and then a pore forming agent is added to obtain premixed powder; (2) performing wet mixing to obtain high-dispersion premixed powder; (3) adding sodium metaaluminate and sodium hydroxide, mixing, crushing and grinding to obtain fully mixed powder; (4) carrying out compression molding to obtain a columnar raw material with the diameter of 5-8 mm and the length of 8-10 mm, drying, roasting, and naturally cooling to room temperature to obtain activated ceramsite; and (5) adding the activated ceramsite into deionized water for hydrothermal reaction, and cleaning and drying to obtain the zeolite ceramsite for advanced treatment of ammonia-nitrogen wastewater. The zeolite ceramsite disclosed by the invention has the characteristics of large specific surface area, developed pore structure and high compressive strength, has the advantages of high selectivity on NH4 < + > in ammonia-nitrogen wastewater, strong anti-interference ion capacity and the like, and still keeps a good effect after cyclic regeneration.

The invention provides an anti-scaling method for a drilling and production wastewater evaporation process, which relates to the technical field of oil and gas field wastewater treatment, and comprises the following steps: adding a sodium hydroxide solution into wastewater to adjust the pH value, and adding a sodium carbonate solution into the wastewater after adjusting the pH value to preliminarily reduce the concentration of calcium and magnesium ions in the wastewater; adding phosphate into the wastewater subjected to primary hardness removal to further remove calcium and magnesium ions, then adding polyaluminum chloride and polyacrylamide for flocculation and precipitation, adding hydrochloric acid into effluent of a precipitation tank to adjust the pH value to 8-9, and then carrying out evaporation treatment. According to the method, calcium, magnesium and strontium ions in the wastewater can be efficiently removed, the removal rate of the calcium and magnesium ions is higher compared with that of a traditional dual-alkali method for removing hardness, and meanwhile cooperative treatment of ammonia and nitrogen is achieved.

The present invention discloses a Bacillus velezensis GY1, which was deposited in the Guangdong Provincial Microbial Culture Collection Center on June 28, 2024, with a deposit number of GDMCC No: 64792. The Bacillus velezensis GY1 provided by the present invention can degrade 100% and 56.4% of nitrogen in M9 culture medium containing 200 mg / L and 1000 mg / L ammonia nitrogen, respectively, and the ammonia reduction rate in the actual production of aquaculture water reaches 53.3%. It also has a strong inhibitory effect on common pathogens in aquatic products: Vibrio alginolyticus, Salmonella and Vibrio parahaemolyticus.

The invention discloses a water quality conditioning agent based on plant extracts and a preparation method of the water quality conditioning agent, and belongs to the technical field of aquaculture. The water quality conditioning agent is prepared from the following raw materials in parts by weight: 14 to 18 parts of fructus schisandrae chinensis extract, 4 to 5 parts of fructus mume extract, 10 to 13 parts of rhizoma coptidis extract, 8 to 10 parts of glucosamine, 5 to 8 parts of chitosan, 3 to 6 parts of nitrifying bacteria, 2 to 4 parts of thiobacillus thiooxidans and 3 to 6 parts of zeolite powder. Through a four-dimensional synergistic mechanism of'plant active ingredient-chitosan slow release-microbial immobilization-zeolite adsorption ', the pH value, ammonia nitrogen, nitrite, hydrogen sulfide and bottom mud COD in tail water can be reduced and the dissolved oxygen amount can be increased under the condition of one-time addition, which indicates that the water quality regulator has a good effect of improving water quality.

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.

Disclosed are an ammonia-containing wastewater treatment method and an apparatus, of which a main structure includes an ammonia wastewater holding tank receiving therein ammonia-containing wastewater, at least one ammonia nitrogen detection element detecting ammonia nitrogen content of the ammonia-containing wastewater, at least one aeration device connected to the ammonia wastewater holding tank, an oxygen transfer coefficient calculation device in information connection with the aeration device. The aeration device includes an aeration time controller and a gas flowrate controller. As such, a total mass of oxygen entering the ammonia wastewater treatment tank can be precisely controlled by adjusting output time and output amount per unit time of the aeration device and calculating an oxygen transfer coefficient-aeration flowrate relationship of the aeration device, so that a ratio between the ammonia nitrogen mass and the oxygen mass can be controlled to have ammonium nitrogen first oxidized into nitrite before being oxidized into nitrate.

The invention relates to the field of aquatic product muscle quality regulation and control. A method for improving muscle quality of fish by regulating intestinal microenvironment through a neuroendocrine system is characterized by comprising the following steps: 1) sterilizing a temporary rearing pond, injecting aerated water to 2 / 3 of the height of the temporary rearing pond, and regulating dissolved oxygen in the water to be 5.0-8.0 mg / L, water temperature to be 16-24 DEG C, pH to be 7.2-8.0 and ammonia nitrogen content to be lower than 0.5 mg / L by using an aerator; (2) adding a mixed input of 50-100 mg / L of lactobacillus brevis MN047 and 20-50 mg / L of lotus rhizome node extract into the water, and stirring to enable the mixed input to be uniformly dispersed; (3) putting fresh and alive freshwater fishes into the temporary rearing pond according to the rearing density of 20-30kg / m < 3 >, and fasting the fishes during temporary rearing; (4) temporary rearing; 5) waiting for detection in a refrigerator at-80 DEG C; (6) determining; and 7) analyzing the data. According to the method, the stress reaction can be relieved after fish stress, neurotransmitters are secreted, intestinal microbial flora is regulated, and then muscle quality deterioration caused by the stress reaction is relieved.

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.

The present invention discloses a photoanode material applied to the synchronous treatment of ammonia nitrogen and refractory organic compounds in high-chloride wastewater by photoelectrocatalysis. It is characterized in that tungsten oxide is in-situ loaded on doped-fluorine SnO2 conductive glass in sequence by layer, oriented crystal plane bismuth vanadate with a carrier space pre-separation structure is hydrothermally grown, and cobalt borate salt cocatalyst is photo-assisted electro-deposited, which greatly improves the photoelectric performance from multiple perspectives such as the effective separation of photo-generated electrons and holes, the charge transfer resistance at the photoanode / solution interface, and the conversion rate of photo-generated holes to redox equivalent substances. The photoelectrochemical system using it as the photoanode realizes the in-situ generation of strongly oxidizing active chlorine by using chloride ions, promotes the oxidation of refractory organic compounds and ammonia nitrogen, effectively controls the generation amount of nitrate nitrogen at the same time, improves the denitrification efficiency, and has the advantages of high efficiency and stability in the synchronous removal process of ammonia nitrogen and refractory organic compounds in high-chloride wastewater.

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.