35 results about "Nitrate reducing" patented technology

The utility model provides a sewage treatment device based on a UASB (Upflow Anaerobic Sludge Blanket) process, which relates to sewage treatment equipment and comprises a tank body, a reaction area, an electric biological treatment area and a settling area are sequentially arranged from the bottom to the top of the tank body, and the reaction area is communicated with the settling area through the electric biological treatment area; a granular sludge bed is arranged in the reaction area; the electro-biological treatment area is provided with a first electrode and a second electrode, and the first electrode and the second electrode are connected with a variable-frequency power supply through wires; periodically reversing the variable-frequency power supply; a water inlet pipe is arranged at the bottom of the tank body and is communicated with the reaction area; a water outlet pipe is arranged at the top of the tank body and is communicated with the settling area. Organic matters are decomposed through microorganisms on the granular sludge bed and converted into biogas, and an alternating-current electric field is generated through the first electrode, the second electrode and the variable-frequency power supply; in the electro-biological treatment area, denitrifying bacteria utilize organic matters as electron donors to reduce nitrate into nitrogen, so that denitrification is realized; meanwhile, the bacteria with the phosphorus removal function absorb and release phosphorus under the action of the electric field, and phosphorus removal is achieved.

The application provides an electrochemical synthesis method of glycine, improves catalytic activity of nitrate reduction and C-N coupling process through atom-dispersed Co-N active sites, and improves mass transfer efficiency through ordered mesoporous structure, thereby relieving the problem of limited substrate diffusion in the reaction process, so that higher glycine Faraday efficiency and yield can be obtained; through taking cobalt acetate tetrahydrate, 1,10-phenanthroline and magnesium hydroxide as raw materials, and sequentially performing reflux coordination, high-temperature pyrolysis and acid washing template treatment, uniform anchoring and atomic-level dispersion of cobalt species in the carbon skeleton can be realized, agglomeration of cobalt particles in the heat treatment process is avoided, and therefore the utilization rate and catalytic activity of cobalt active sites are significantly improved. Meanwhile, the magnesium hydroxide as a template material is removed in the subsequent acid washing process, and rich mesoporous structure can be formed in the catalyst, which is beneficial to rapid diffusion and mass transfer of reactants, intermediates and products, and diffusion limitation in the reaction process is relieved.

The invention discloses a self-purification prediction simulation method for a petroleum hydrocarbon polluted site under soil-water interaction based on COMSOL Multiphysics, and the method comprises the steps: obtaining historical meteorological data, and constructing a rainfall flux simulation process through a function; taking the rainfall flux as an upper boundary source item for driving the three-phase fluid to move, and constructing a three-phase fluid motion model; simulating and predicting a migration path and a phase transformation process of the dissolved phase petroleum hydrocarbon in a water phase; constructing a migration path of an electron acceptor and a migration path of gas-phase oxygen, establishing a degradation kinetic model of each path, calculating a total biodegradation flux through aerobic degradation, nitrate reduction degradation and sulfate reduction degradation, and correcting the degradation kinetic models of the paths by using correction factors; biodegradation flux and a three-phase fluid motion model are coupled, rainfall flux is constructed through a piecewise function and annual rainfall data and is directly associated to core parameter soil water phase pressure, and the physical consistency of a driving mechanism is enhanced.

This application relates to a method and its application for reducing nitrate nitrogen to ammonia nitrogen in wastewater using a dual-bacterial inoculant. The method involves separately expanding, washing, and resuspending electron-donating bacteria and dissimilatory nitrate-reducing ammonium-producing bacteria, then mixing them in a co-culture medium to form a dual-bacterial inoculant; introducing the co-culture medium containing the dual-bacterial inoculant into the wastewater to be treated, and reducing nitrate nitrogen to ammonia nitrogen in the wastewater under anaerobic conditions. This method can reduce nitrate nitrogen in wastewater into a high-energy-density energy storage substance, and can also alleviate the problems of low utilization rate of ammonium nitrogen fertilizer and non-point source pollution, which is of great value for nitrogen pollution control and green sustainable agricultural development.

The invention belongs to the technical field of environmental treatment, and particularly relates to a wastewater treatment system and a method for treating kitchen waste water. The sludge subjected to anaerobic fermentation modification in the sludge modification tank is used for adsorbing grease in the kitchen waste water, so that the grease removal rate is increased; effluent of the anoxic tank flows back to the anaerobic tank, sulfide generated by protein decomposition in the anaerobic tank is oxidized into sulfate, and the emission of malodorous gas is reduced; partial nitrate is reduced into nitrite through short-cut denitrification of the anoxic tank, and a substrate is continuously provided for anaerobic ammonia oxidation; and the total nitrogen removal rate is improved on the premise of not additionally adding a carbon source. The anaerobic tank is inoculated with hydrolytic acidification bacteria, refractory organic matters are hydrolyzed into biodegradable organic matters, denitrifying bacteria utilize the biodegradable organic matters to convert nitrite / nitrate into nitrogen, and phosphorus-accumulating bacteria synchronously complete anaerobic phosphorus release; and the aerobic tank uses nitrite / nitrate of the effluent of the anoxic tank as an oxidizing agent to promote phosphorus-accumulating bacteria to absorb phosphorus so as to realize phosphorus removal.

This invention discloses a ruthenium complex-modified nickel-based metal framework material, its preparation method, and its application in the electrocatalytic reduction of nitrate to ammonia. The method includes: adding a DMAC solution of terephthalic acid to an aqueous nickel chloride solution, mixing, adding the ruthenium complex, transferring the resulting solution to an autoclave for solvothermal treatment, immersing the resulting precipitate in an aqueous ammonium hexafluorophosphate solution, and stirring at room temperature to obtain RuNi-BDC. The introduction of the ruthenium complex, through the interaction between its organic ligands and the MOF framework, achieves high dispersion of ruthenium species, increases the exposure of active sites, and enhances the structural stability of the material. This system optimizes the adsorption energy for reaction intermediates, transforming the catalytic mechanism from single Ni catalysis to Ni-Ru bimetallic synergistic catalysis, effectively lowering the energy barrier of the rate-determining step of nitrate reduction, and improving the activity of the electrocatalytic nitrate reduction reaction, providing a new approach for achieving efficient electrocatalytic reduction of nitrate to ammonia.

The invention belongs to the technical field of water pollution control, and particularly relates to an ammonia direct oxidation denitrification system and method for nitrate-containing sewage, the method comprises the following steps: S1, in an anoxic AMAO denitrification reactor, acetone is added into the ammonia nitrogen and nitrate-containing sewage, AMAO functional microorganisms take acetone as a mediator and take nitrate as an electron acceptor, and the ammonia nitrogen and nitrate-containing sewage is subjected to denitrification treatment; ammonia nitrogen is oxidized, nitrate is reduced, and nitrogen is generated synchronously; s2, the effluent in the step S1 enters an aerobic AMAO deep denitrification reactor, residual acetone is utilized to further oxidize residual ammonia nitrogen through an AMAO reaction under the aerobic condition, and deep denitrification is achieved. According to the method, the same core metabolic pathway is utilized, the nitrate and ammonia nitrogen removal problem is sequentially solved through environmental regulation and control, the process is compact, operation is easy and convenient, the treatment efficiency of the compound nitrogen polluted wastewater is remarkably improved, the total nitrogen removal rate can reach 95% or above, the total nitrogen of effluent is stably lower than 2 mg / L, the deep nitrogen removal effect is remarkable, and the method is suitable for industrial production. And the risk of nitrate residue or secondary pollution in the traditional process is thoroughly avoided.

The invention discloses a preparation method and application of a CdS / COF heterojunction photocatalytic material for ammonia production through nitrate reduction, relates to a preparation method and application of a photocatalyst, and aims to solve the problem that the efficiency of ammonia production through nitrate reduction of a COF photocatalyst or a COF / CdS heterojunction catalyst is low. The method comprises the following steps: preparing COF powder from 1, 3, 5-tris (4-aminophenyl) benzene and 1, 3, 5-benzenetricarboxaldehyde; the preparation method comprises the following steps: preparing a CdS / COF heterojunction photocatalytic material, uniformly coating the outer surface of COF with CdS by adopting an in-situ growth mode to obtain the CdS / COF heterojunction photocatalytic material, applying the CdS / COF heterojunction photocatalytic material to photocatalytic reduction of nitrate to produce ammonia, under the irradiation of an AM 1.5 lamp and under the condition of not adding any sacrificial reagent, the NH4 < + > yield reaches 138.21 micromoles g <-1 > h <-1 > and is improved by 3.04 and 2.39 times compared with pure CdS and COF, and the CdS / COF heterojunction photocatalytic material can be applied to the field of photocatalytic reduction of nitrate to produce ammonia.

This invention discloses a method for treating nitrogen-containing wastewater based on nitrate dissimilatory reduction combined with sulfur autotrophic denitrification coupled with anaerobic ammonia oxidation, belonging to the field of wastewater microbial treatment technology. It employs a coupling of nitrate dissimilatory reduction to ammonium, sulfur autotrophic denitrification, and anaerobic ammonia oxidation. The anaerobic ammonia oxidation reaction requires the supply of nitrite and ammonia nitrogen, while nitrate dissimilatory reduction (DNRA) can produce ammonia nitrogen, and sulfur autotrophic denitrification can accumulate nitrite nitrogen. Furthermore, the three processes require similar environmental conditions, and the substrate and products can complement each other well. Under anaerobic conditions, DNRA bacteria reduce nitrate to ammonia nitrogen, and sulfur autotrophic denitrifying bacteria reduce nitrate to nitrite. By controlling the ratio between sulfide and nitrate nitrogen (i.e., the sulfur-nitrogen molar ratio), the reaction type is guided, ensuring that the products are ammonia nitrogen and nitrite. Then, the anaerobic ammonia oxidation reaction occurs, achieving simultaneous removal of ammonia nitrogen and nitrite nitrogen. This method can increase the removal rate and removal load of ammonia nitrogen in wastewater.

The invention discloses a high-ammonia-nitrogen wastewater treatment method, and belongs to the field of water treatment. The method comprises the following steps: firstly, carrying out FeCl2 solution activation on a Fe0 + SiO2 core-shell structure vertical suspension carrier, then adding magnetic nanoparticles in an anaerobic ammonium oxidation zone, applying an external magnetic field, guiding anaerobic ammonium oxidation bacteria to be enriched on the surface of the carrier, domesticating at 15 DEG C, and inducing to form a high-coverage biological membrane. The system adopts a partition coupling design: a partial ammonia nitrogen is converted into nitrite by a short-cut nitrification tank; in the short-cut denitrification zone, organic matters in raw water are utilized to reduce residual nitrate in the system into nitrite; and in the anaerobic ammonia oxidation zone, ammonia nitrogen and the nitrite provided in the previous step are used for denitrification. By intelligently controlling internal reflux, the by-product nitrate of anaerobic ammonia oxidation is converted into nitrite for reuse, and internal circulation of nitrogen is formed. The method solves the problems of slow growth and easy loss of anaerobic ammonium oxidation bacteria, by-product nitrate accumulation, low-temperature activity inhibition and the like, and significantly improves the denitrification efficiency and stability of the system.

The invention relates to an enrichment method of anaerobic nitrate reduction microorganisms and application thereof, and belongs to the technical field of microorganisms. According to the enrichment method disclosed by the invention, active cells in a solid sample are extracted by utilizing a Nycodenz density gradient centrifugation method, and then the active cells are inoculated into an anaerobic nitrate culture medium to carry out directional enrichment on anaerobic nitrate reducing microorganisms. According to the method, active cells can be efficiently enriched, the influence of a matrix is effectively reduced, and meanwhile, compared with a conventional cell enrichment technology, the efficiency is higher, and the cost is lower.

The invention discloses a preparation method and application of a BiOCOOH-A-Fe photocatalyst, and the specific preparation process is as follows: pre-prepared BiOCOOH is taken as a carrier, iron monoatoms are stably anchored on the surface of the BiOCOOH through the axial coordination effect of APTES, the APTES can realize firm loading of the iron monoatoms by the BiOCOOH, so that the prepared composite photocatalyst has better stability and catalytic activity, and the prepared composite photocatalyst has good application prospects. Meanwhile, a-NH2 terminal group which does not participate in coordination in the APTES can obviously enhance the adsorption of NO3 <->, so that the selectivity of nitrogen in the process of photocatalytic reduction of nitrate by the composite catalyst can be improved. The composite photocatalyst has the advantages of wide light response range, high quantum efficiency and the like, nitrate in a water body can be efficiently and rapidly reduced into nitrogen under the illumination condition, and the composite photocatalyst has good stability, can be recycled for multiple times and is an ideal water treatment photocatalyst.

The invention belongs to the field of environmental engineering and wastewater biological treatment, and particularly relates to an efficient denitrification method based on a VFA-sucrose mixed carbon source and application of the efficient denitrification method. Activated sludge is inoculated in a denitrification device, VFA-cane sugar is used as an external carbon source, a domesticated denitrification microbial system is obtained through periodic modes of water inlet, anoxic reaction, precipitation, drainage and the like, and the system selectively enriches functional bacteria such as bacteroides, geomonas and competitive bacillus. The gene abundance of a substrate transport system (ABC transporter) and a fatty acid metabolic pathway in a microbial community is remarkably enhanced, the nitrate reduction rate is remarkably improved, and the nitrite accumulation amount is controlled at an extremely low level lt; the COD (Chemical Oxygen Demand) removal rate is more than 95%, and the method is particularly suitable for deep denitrification treatment of wastewater.

This invention discloses an apparatus and method for electrochemical oxidation-reduction synergistic treatment of chlorine-containing complex organic wastewater. The apparatus includes a reaction vessel (1), a chlorine-evolving anode (2) disposed therein, a reduction cathode (3) capable of generating atomic hydrogen in situ, a DC power supply (4), and a stirrer (5). The method includes: introducing wastewater containing chloride ions, ammonia nitrogen, and organic pollutants into the reaction vessel, adjusting the pH value, and adding ferrous salt; during the electrochemical reaction, the active chlorine generated at the anode activates ferrous ions to generate high-valence iron, selectively oxidizing the pollutants; the atomic hydrogen generated at the cathode reduces and dechlorinates the chlorine-containing intermediates, and removes Fe... 3+ The reduction and regeneration process achieves a closed-loop cycle of iron species, while the reduction of nitrates achieves a nitrogen cycle. This invention deeply couples anodic oxidation and cathodic reduction, achieving efficient mineralization of complex pollutants and effectively preventing the accumulation of toxic chlorination byproducts.

The invention relates to a livestock and poultry solid manure aerobic composting process capable of reducing generation of nitrous oxide, and belongs to the technical field of agriculture. The invention provides a livestock and poultry solid manure aerobic composting process for reducing generation of nitrous oxide, which comprises the following steps: mixing livestock and poultry solid manure and auxiliary materials, and adjusting the C / N ratio and the water content to obtain a mixed substrate; adding a nitrifying bacterium agent and a denitrification inhibitor into the mixed matrix, mixing to form a pile body, covering the pile body with a molecular film, arranging an aeration device at the bottom of the pile body for aerobic composting, and ending composting when the temperature of the pile body is less than or equal to 40 DEG C, the water content is less than or equal to 30% and the seed germination index is more than or equal to 70%. Aerobic composting of livestock and poultry manure is optimized through molecular film covering and coupling nitrification and denitrification treatment, the nitrite reduction effect is reduced through a denitrification inhibitor, conversion of nitrite to nitrate is enhanced through nitrifying bacteria, finally, N2O emission is reduced, nitrogen loss is reduced, the humification effect is enhanced, and humus stability is improved.

Disclosed are an electrochemical nitrate reduction system and a method of inducing reduction of nitrate. The electrochemical nitrate reduction system includes an electrolyte including an acidic aqueous solvent and nitrate having a concentration of greater than or equal to about 6 m, and an electrode. The method of inducing electrochemical reduction of nitrate includes preparing an electrochemical device, which includes an electrolyte solution including an acidic aqueous solvent and a nitrate having a concentration of greater than or equal to about 6 m, and an electrode, and applying a potential to the electrode to suppress a hydrogen evolution reaction and induce reduction of the nitrate.

The invention discloses an electrochemical system and method for removing polymorphic nitrogen pollutants in aquaculture tail water as well as a cathode material and a preparation method of the cathode material. The cathode material is formed by loading Fe2O3 at C particles on a carbon felt, the Fe2O3-C particle has a core-shell structure, the Fe element forms an internal core, and the exterior is uniformly coated with the C element to form a tight heterojunction. A cathode electrode plate in the electrochemical system is made of the magnetic carbon-coated iron oxide cathode material, and the electrochemical system further comprises an aeration pump for aeration near the cathode electrode plate. Through unique combination of the Fe2O3 (at) C / CF cathode and the efficient anode, the three functions of anodic oxidation, cathode nitrate reduction and cathode in-situ electro-Fenton are organically integrated, an efficient cooperative treatment mechanism is formed, polymorphic nitrogen pollutants in wastewater can be removed at the same time, the whole process does not need additional chemicals, the technological process is simple, intelligent control is easy, and the method is suitable for industrial production. The method is environment-friendly, and efficient and deep purification of the breeding wastewater can be realized.

The invention discloses a biological soil conditioner as well as a preparation method and application thereof. The biological soil conditioner comprises: a porous hydrogel shell; the microbial preparation has a nitrate reduction function; phosphorus-rich biochar subjected to metal modification; wherein the porous hydrogel shell wraps and fixes the microbial preparation and the phosphorus-rich biochar; the phosphorus-rich biochar is distributed in the porous hydrogel shell. The biological soil conditioner overcomes the defects that an existing soil conditioner is single in function, poor in microbial compatibility, too fast in nutrient release, not lasting in heavy metal fixing effect and the like. Multifunctional and long-acting in-situ improvement of polluted soil is achieved, and the problems of heavy metal pollution, soil depletion, nitrogen and phosphorus loss and the like are solved synchronously.

This invention discloses an apparatus and method for treating domestic sewage and high-ammonia nitrogen wastewater using a segmented influent dual-short-cut anaerobic ammonia oxidation (AAO) denitrification technology. Wastewater is pumped in in three stages: the first stage provides sufficient carbon source to drive short-cut denitrification; the middle stage maintains ammonia nitrogen supply to ensure AAO; and the final stage limits carbon source to inhibit heterotrophic bacteria proliferation. In the anoxic stage, the carbon source from the domestic sewage drives short-cut denitrification to reduce nitrate to nitrite, coupled with AAO to achieve denitrification; the aerobic stage achieves short-cut nitrification and continuously supplies substrate for AAO, forming a nitrogen recycling system. A strategy of shortening settling time is adopted to screen and form a layered granular sludge structure with AAO bacteria as the core. The outer layer is enriched with short-cut nitrifying and denitrifying bacteria, while the inner anoxic zone retains AnAOB, thus improving biomass retention capacity. This invention achieves a total nitrogen removal rate of 96±0.8% under the condition of 650±60 mg / L of total nitrogen in the influent, with an anaerobic ammonia oxidation contribution rate of 83±2.6%, and eliminates the need for an external carbon source and produces no N2O emissions.

The invention belongs to the technical field of water pollution treatment, and discloses a biological hybrid, a construction method thereof and application of the biological hybrid in denitrification nitrogen removal of high-salt nitrogen-containing wastewater, the biological hybrid is constructed by an H.titanicae BH1 strain and a MoS2 nano material, and the nitrate reduction rate of the constructed H.titanicae BH1 / MoS2 biological hybrid is remarkably improved compared with that of a single H.titanicae BH1 strain; meanwhile, the hybrid can enhance the denitrification process by improving the activity of a denitrification key enzyme, promoting the secretion of extracellular secretions (EPS) and enhancing the electron transfer performance, and shows high salt adaptability superior to that of a single strain within the salinity range of 2%-7%. The invention provides a novel microbial preparation and a technical scheme for efficient treatment of high-salt nitrogen-containing wastewater, has the advantages of high treatment efficiency, strong environmental adaptability, no secondary pollution and the like, and has a wide application prospect.

The invention belongs to the technical field of microorganisms, and discloses a strain of nitrate reduction pseudomonas Z22, the preservation number of which is CGMCC (China General Microbiological Culture Collection Center) No.35874, and the strain of nitrate reduction pseudomonas Z22 has heterotrophic nitrification-aerobic denitrification capability, and can synchronously remove ammonia nitrogen, nitrate nitrogen and phosphate in wastewater under an aerobic condition. The strain has remarkable tolerance and synergistic removal capacity to cadmium (II), and when the cadmium concentration is 0-20 mg / L and the temperature is 15-40 DEG C, the nitrogen removal rate can reach 15-85%, the phosphorus removal rate can reach 20-80%, and the cadmium removal rate can reach 20-60%. The invention also provides a special culture medium of the strain, a preparation method of a microbial inoculum and application of the microbial inoculum in a nitrogen, phosphorus and cadmium-containing combined pollution wastewater treatment system, and the microbial inoculum is suitable for wastewater treatment in industries such as chemical industry, electroplating and metallurgy, and has the advantages of high efficiency, wide temperature adaptation, simplicity and convenience in operation and the like.

The invention provides an anaerobic ammonium oxidation bacteria efficient sustainable denitrification method, which comprises the following steps: inoculating a biological hybridization system constructed by anaerobic ammonium oxidation bacteria and cadmium sulfide in an anaerobic ammonium oxidation reactor, adding nitrate-containing wastewater and a sacrificial agent, and applying light for treatment. The cadmium sulfide is prepared by reacting cadmium chloride with thioacetamide in polyethylene glycol, and the cadmium sulfide and anaerobic ammonium oxidation bacteria liquid are mixed and incubated to form a hybrid system. According to the method, photo-induced electrons of cadmium sulfide are used for driving anaerobic ammonium oxidation bacteria, nitrate generated by metabolism of the anaerobic ammonium oxidation bacteria is converted into nitrite and ammonium through a way of reducing dissimilatory nitrate into ammonium, and then the nitrite and the ammonium are converted into nitrogen through an anaerobic ammonium oxidation way, so that conversion and deep removal of the nitrate are realized in the system. The nitrogen removal rate limit of 89% of a traditional process is broken through, the total nitrogen removal rate can reach 98% or above, no organic carbon source is needed, no greenhouse gas nitrous oxide is discharged, solar driving is utilized, and the process is clean, efficient and sustainable.

The invention discloses compost bacillus, a bio-organic fertilizer and application of the bio-organic fertilizer, and relates to the technical field of agricultural production. The name of the strain is QY6, and the strain is preserved in the China General Microbiological Culture Collection Center (CGMCC) with the preservation number of CGMCC No.33139. The strain has high nitrate reducing capacity and can promote conversion of nitrate to ammonium nitrogen through a dissimilatory nitrate reduction way, so that the nitrogen retention capacity of soil is enhanced, the loss of nitrogen fertilizer is reduced, the underground water pollution risk caused by nitrate leaching loss is relieved, and the agricultural production cost is reduced; in addition, the invention also provides a method for preparing a bio-organic fertilizer by using the strain, and the strain provided by the invention, a microbial inoculum prepared from the strain and the bio-organic fertilizer can be used for plant growth promotion or soil improvement.

The invention discloses a nitrite-free salted fish production method which comprises the following steps: cleaning fresh fish with sterile water to remove nitrate reducing bacteria on the surface of the fresh fish; meanwhile, pickling and air drying are performed at low temperature, so that the activity of nitrate reducing bacteria is inhibited, the content of nitrite in the salted fish is remarkably reduced, and the edible safety of the product is ensured.

The invention relates to the technical field of sewage treatment and CO2 immobilization and conversion, and particularly discloses a microbiological treatment method for synchronously realizing wastewater denitrification and CO2 immobilization, which comprises the following steps: respectively carrying out expanding culture, washing and resuspending on CO2 immobilizing bacteria and denitrifying bacteria to obtain a CO2 immobilizing bacteria solution and a denitrifying bacteria solution; the method comprises the following steps: inoculating a liquid-phase system containing nitrate with a CO2 immobilized bacterium liquid and a denitrifying bacterium liquid under an anaerobic condition, introducing synthesis gas containing H2 and CO2, synthesizing an organic carbon source by the CO2 immobilized bacterium through the synthesis gas, and reducing the nitrate in the liquid-phase system into nitrogen by the denitrifying bacterium through the organic carbon source as an electron donor. The invention develops a novel negative carbon denitrification process capable of realizing emission reduction of greenhouse gases while treating nitrogen pollution.

The application discloses a salt-tolerant aniline high-efficiency degradation and denitrification and phosphorus removal nitrate-reducing bacterium and application thereof, and belongs to the wastewater treatment and microbial technology field. Nitratireductor The strain is sp. AS9, is preserved in the China General Microbiological Culture Collection Center, and has a preservation number of CGMCC No. 36404 and a preservation date of October 30, 2025. The strain has high-salt high-nitrogen and phosphorus high-concentration aniline tolerance, can take aniline as the only carbon and nitrogen source, can efficiently degrade aniline under low, medium and high-concentration aniline conditions, and can simultaneously realize denitrification and phosphorus removal. In particular, the aniline degradation efficiency and denitrification capacity of the strain are more prominent in a high-concentration aniline environment. In addition, the AS9 strain can simultaneously perform nitrification-denitrification denitrification and phosphorus removal reaction, and has great application potential and technical advantages in the treatment of wastewater containing high-salt high-nitrogen and phosphorus aniline compounds.

The application discloses a kind of integrated circuit wastewater biochemical treatment with efficient biological synergist and its application, it is related to wastewater treatment technical field.The specific preparation method includes: microorganism flora, enzyme preparation, trace element, algal substance, organic acid, regulator and nutrient substance are mixed into solvent to obtain biological synergist.Wherein, microorganism flora can oxidize ammonia nitrogen into nitrate, and nitrate is reduced to nitrogen, realize the removal of ammonia nitrogen, reduce total nitrogen content;Enzyme preparation can accelerate biochemical reaction process;Trace element provides necessary nutrient support for microbial growth;Algal substance helps to adjust the ecological balance of system;Organic acid can adjust the pH value of wastewater, buffer metal ion, salt and the toxic effect of toxic compound;Regulator promotes the growth and metabolism of microorganism flora;Nutrient substance promotes the growth and reproduction of microorganism.These substances act together, improve the removal efficiency of biological synergist to ammonia nitrogen and total nitrogen.

The invention provides application of exogenous application of fulvic acid in remediation of waterlogged soil, and belongs to the technical field of soil remediation. The invention provides application of exogenous application of fulvic acid in remediation of waterlogged soil. Through waterlogging and application of fulvic acid after waterlogging, nitrate reduction and denitrification effects can be weakened, and soil nitrogen loss caused by a denitrification approach is effectively relieved. The competitive effect of microorganisms and plants on nitrate in the nitrate reduction process can be reduced, adverse factors of the plants for absorbing available nitrogen in soil are reduced, and the nitrogen absorption efficiency of the plants is improved. Therefore, the exogenous FA can relieve adverse effects of waterlogging on available nitrogen in soil and nitrogen absorption of plants, and the content of the available nitrogen in the soil is increased. The exogenous application of fulvic acid can also significantly improve microbial communities in the waterlogged soil and improve the physicochemical properties of the soil. The application of the exogenously applied fulvic acid in remediation of waterlogged soil provides a reference basis and a theoretical basis for remediation of waterlogged crops.

The invention discloses a photoelectrocatalysis membrane electrode for nitrate nitrogen wastewater treatment, a preparation method of the photoelectrocatalysis membrane electrode and an ammonia recovery coupling integrated device, and belongs to the technical field of photoelectrocatalysis. The photoelectrocatalysis membrane electrode disclosed by the invention has a photoelectrocatalysis synergistic effect. The high dispersity of metal single atoms on carbon nitride enhances the adsorption and activation capability of the membrane electrode to nitrate, and meanwhile, improves the carrier separation efficiency and the photo-induced electron utilization rate, and can realize efficient and stable reduction of nitrate into ammonia with low energy consumption. The continuous flow type photoelectrocatalysis membrane reactor and the ammonia recovery device are integrated, nitrate wastewater is reduced into ammonia at a cathode after entering the photoelectrocatalysis membrane reactor, the ammonia flows out of the ammonia recovery device through a water outlet hole, the ammonia in the wastewater overflows from a hollow fiber membrane and is collected by acid, and the remaining wastewater is recycled to a wastewater pool again. The processes of nitrate photoelectric catalytic reduction and ammonia separation and recovery are realized.