130 results about "Nitrifying bacteria" patented technology

The invention relates to a CdS / denitrifying bacteria hybrid system as well as a construction method and application thereof, and relates to the technical field of water nitrate pollution treatment. Comprising composite denitrifying bacteria, Zn-doped CdS heterojunction nanoparticles loaded on the surface of the composite denitrifying bacteria, and an electronic mediator anchored at the interface of the heterojunction nanoparticles and a flora, the composite denitrifying bacteria are prepared from Stutzeria balearica CXK-1 and Stutzeria balearica GUA-1 according to the volume ratio of the Stutzeria balearica CXK-1 to the Stutzeria balearica GUA-1 to the Stutzeria balearica GUA-1 to the Stutzeria balearica GUA-1 being 1 to (0.8 to 1.2). The hybrid system can utilize photoelectrons to drive microbial denitrification under an illumination condition, so that the reduction of nitrate radicals is realized, and the effect of water treatment is achieved.

This utility model discloses an oxygen denitrification treatment device for aquaculture water, including a treatment tank. The treatment tank is equipped with a filtration zone, an aerobic biological zone, an anoxic biological zone, and a degassing zone. The filtration zone is filled with quartz sand filter media. The aerobic biological zone contains biological packing material and has a jet aeration ring on its outer wall, which is connected to an ozone-oxygen mixture generator. The anoxic biological zone is filled with porous ceramsite packing material. The degassing zone has a guide plate inside. In this utility model, the aquaculture water can be filtered for suspended particulate matter through the quartz sand filter media. The jet aeration ring can introduce ozone-oxygen mixture gas, which, together with the honeycomb biological packing material, can complete ammonia nitrogen oxidation. The denitrifying bacteria on the surface of the porous ceramsite packing material can convert nitrates into nitrogen gas. Finally, the gas is separated by the guide plate, and the purified water can be discharged from the outlet. Thus, through the above structure, efficient denitrification, oxygenation, and purification of aquaculture water can be achieved, improving water quality treatment efficiency and stability.

The application provides a biological denitrification treatment method for low-carbon-nitrogen-ratio wastewater, and utilizes single-stage nitrification and denitrification to treat ammonia-nitrogen wastewater in a one-piece submerged biological filter (SBAF reactor). The method comprises the following steps: sludge inoculation, sludge biofilm formation, system starting, and stable operation. In the sludge inoculation, sludge meeting the microbial community distribution is selected. In the system starting process, the microbial community distribution in the sludge in the one-piece submerged biological filter (SBAF reactor) is used as the symbol of successful system starting. During the input of the high-concentration ammonia-nitrogen wastewater to be treated, the aerobic nitrifying bacteria and the anaerobic denitrifying bacteria can more stably meet the above microbial community distribution, the system has better stability, the stable operation time is longer, the sludge does not need to be replaced for restarting during the stable operation, the continuous operation time is longer, can reach at least 250 days or more, and the frequency of replacing the sludge for restarting is reduced.

This application relates to the field of wastewater treatment, specifically disclosing a sulfur autotrophic denitrification process; including the following specific steps: S1: After adjusting the pH of calcium nitrate tetrahydrate solution and ammonium dihydrogen phosphate solution to alkaline, triethanolamine is added dropwise to the calcium nitrate solution, followed by the addition of ammonium dihydrogen phosphate solution to form a reaction solution. The pH of the reaction solution is maintained at alkaline, and the reaction is heated. After filtration, washing, and drying, hydroxyapatite powder is obtained. The hydroxyapatite powder is mixed with a foaming agent, foam stabilizer, and adhesive, pressed into shape, and sintered to obtain a porous ceramic carrier; S2: The porous ceramic carrier, ground inorganic energy material, and denitrifying bacteria are added to the wastewater to be treated, mixed, and subjected to aeration treatment. The inorganic energy material is replenished periodically to complete the process. The sulfur autotrophic denitrification process used in this application has high denitrification efficiency, and no replenishment of denitrifying bacteria is required during the process.

This invention discloses a denitrification biological carrier, its preparation method, and its application. The raw materials for preparing the denitrification biological carrier include an iron agent, modified activated carbon, polycaprolactone, sodium dodecyl sulfate, and a hydrogel binder. The modified activated carbon is 3-chloro-2-hydroxypropyltrimethylammonium chloride-modified activated carbon. The iron agent not only removes dissolved oxygen from water but also reduces total nitrogen in wastewater. The modified activated carbon improves its adsorption affinity for nitrogen-containing compounds. Polycaprolactone serves as a slow-release carbon source for denitrification, exhibiting high carbon source utilization. Sodium dodecyl sulfate, through its foaming properties, together with the modified activated carbon, iron agent, and polycaprolactone, forms a high-mechanical-strength, rough, and porous biological carrier structure, providing excellent attachment conditions for heterotrophic denitrifying bacteria. Therefore, applying the denitrification biological carrier of this invention to wastewater treatment systems can achieve good nitrogen removal efficiency and economic benefits.

The invention relates to the technical field of sewage treatment, in particular to a water body biotoxicity early warning system based on self-sustaining of denitrifying microorganisms. The early warning system comprises an early warning device, an early warning filtering system located at the front end of the early warning device, a nitrate nitrogen monitor located at the rear end of the early warning device, a carbon source storage tank used for storing a carbon source and a nitrate nitrogen storage tank used for storing nitrate nitrogen. The nitrate nitrogen monitoring instrument is used for monitoring the change of the concentration of nitrate nitrogen, so that the toxicity detection and early warning of inlet water are realized. The water body biotoxicity early warning system is arranged based on denitrifying bacteria, through the biofilm filler, the early warning system is high in impact resistance and better in stability in the use process, and meanwhile, the system is more stable and reliable in the use process in cooperation with a corresponding filtering-backflushing system, a filler stirring and flushing system and a parallel system; and the device is convenient to use and maintain, is more suitable for actual production, and has wide application and popularization prospects.

The application provides a method and device for treating wastewater by combining a suspended filler floating bed and a soil infiltration system, and the method comprises the following steps: S1, breeding wastewater is treated by the suspended filler floating bed after passing through a hydrolysis tank, and effluent is treated in a sedimentation tank, and wastewater of the suspended filler floating bed is returned to the suspended filler floating bed for secondary treatment; S2, wastewater of the sedimentation tank is returned to the hydrolysis tank; and S3, effluent of the sedimentation tank is introduced into a soil underground infiltration system. The system provided by the application is beneficial to further strengthening the effects of denitrification, phosphorus removal and removal of suspended solids, and solves the problems of low dissolved oxygen content of influent and wastewater in the system, which is not conducive to the growth of nitrifying bacteria, and low effective volume utilization rate. In the use process, the filler does not need to be replaced, and mechanical aeration equipment does not need to be added, and the system has the advantages of low investment cost, no need to add chemical agents for treatment, obvious effect, not easy to breed mosquitoes, simple operation and management, and beautification of the environment, and has remarkable ecological and economic benefits for promoting deep purification of breeding wastewater.

This utility model discloses an aerobic mixed liquor nitrification and deoxygenation treatment device, including a first nitrification tank. A nitrite-containing bacteria storage tank is located at the top of the first nitrification tank. An inlet pipe is located at the top of one side of the first nitrification tank, and one side of the inlet pipe extends into the interior of the first nitrification tank and is equipped with a sludge-water separation chamber. Through the cooperation of the inlet pipe, sludge discharge pipe, screen, and sludge-water separation chamber, this utility model can separate the sludge mixed in with the mixed liquor during its inflow, while also facilitating the return of the sludge to the treatment tank. Then, through the cooperation of a second discharge pipe, a third pump, a pump installation chamber, a distribution plate, a distribution pipe, a heat dissipation chamber, and a fan, the mixed liquor can be continuously circulated and cooled during the nitrification reaction, thereby maintaining the mixed liquor at 20-30°C to preserve the activity of nitrite-containing bacteria and nitrifying bacteria in the mixed liquor and ensure reaction efficiency.

This invention relates to a composite ecological device for in-situ enhanced denitrification of low-temperature river water and its application. The composite ecological device for in-situ enhanced denitrification of low-temperature river water comprises, from top to bottom, an insulation layer, a nitrification layer, and a denitrification layer. The nitrification layer includes a biological blanket and composite biological packing material fixed on the biological blanket, with low-temperature resistant nitrifying bacteria inoculated on the biological blanket and composite biological packing material. The denitrification layer includes packing balls, which are doped with a slow-release carbon source and inoculated with low-temperature resistant denitrifying bacteria. This invention also provides an application of the composite ecological device for in-situ enhanced denitrification of low-temperature river water. This invention solves the problem of significantly reduced biological denitrification efficiency in traditional denitrification processes under low-temperature conditions, as well as the problems of poor connection between stratified treatments leading to retention of nitrification products, and insufficient alkalinity in the denitrification zone inhibiting denitrification. It also solves the problem of uncontrollable carbon source addition leading to secondary pollution.

The invention discloses a method for reducing inhibition of free nitrous acid on toxicity of microalgae, and belongs to the technical field of biology and new medicine. In order to solve the problem that free nitrous acid (FNA) in a microalgae-nitrifying bacteria co-culture system destroys a microalgae photosynthetic system and inhibits growth, alpha-ketoglutaric acid with the final concentration of 0.5-1.0 mM is exogenously added into the microalgae-nitrifying bacteria co-culture system, so that carbon and nitrogen metabolism of microalgae is regulated and controlled, the tolerance of the microalgae to FNA is enhanced, the photosynthetic efficiency and biomass of the microalgae are remarkably improved, and the microalgae-nitrifying bacteria co-culture system can be used for preparing the microalgae-nitrifying bacteria co-culture system. The ammonia nitrogen removal rate and the system stability are improved; the method is easy and convenient to operate, low in cost, suitable for high-ammonia-nitrogen wastewater treatment and capable of assisting long-term stable operation of a phycomycete symbiotic system.

1. Name of the product in this design: Filter material (plum blossom aquatic plant planting ring). 2. Purpose of this design: To cultivate nitrifying bacteria and promote the colonization of aquatic plants in the filter media of aquariums, thereby purifying the water environment inside the aquarium. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application belongs to the technical field of wastewater monitoring, and particularly relates to an online wastewater toxicity monitoring device and method based on nitrifying bacteria biofilm, which comprises a sample storage bottle, a nutrient solution pool, a buffer pool, a mixing and dissolved oxygen pool, an ultraviolet sterilization lamp, a gas-liquid mixing nozzle, a biofilm reactor, and a conveying pump for pumping liquid and gas, and valves and pumps for controlling the opening and closing of the conveying pipeline. The online wastewater toxicity monitoring device and method based on nitrifying bacteria biofilm have the advantages of high detection efficiency and detection accuracy, flexible and convenient use, simple structure, and low manufacturing cost.

1. Name of the product in this design: Bacterial House (Wind and Fire Wheel). 2. Purpose of this product design: To be placed in an aquarium to cultivate nitrifying bacteria and filter impurities. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 front view. 5. Design 1 is designated as the basic design. 6. Other situations requiring explanation: Other explanation: The outlines, surface transition lines and other auxiliary lines in the view are only used to assist in representing the three-dimensional shape design of this product, and are not actual product outlines or patterns.

The invention discloses a multistage enzyme and quorum sensing signal molecule MABR membrane and a preparation method thereof, through a bionic induction strategy, while the anti-pollution characteristic of the MABR membrane is maintained, multistage enzyme and quorum sensing signal molecules are fixed on the surface of the membrane, and the multistage enzyme and quorum sensing signal molecules induce microorganisms to secrete an extracellular polymeric substance (EPS), so that the binding strength of a biological membrane is improved by 40% or more. The preparation method of the multi-stage enzyme and quorum sensing signal molecule MABR membrane comprises the following steps: (1) screening nitrifying bacteria and extracting multi-stage enzyme and quorum sensing signal molecules of the nitrifying bacteria; (2) carrying out composite pretreatment on the surface of the MABR membrane, wherein the composite pretreatment comprises hydrophilic modification, functional group introduction, swelling of the surface of membrane silk and the like; and (3) immobilizing multistage enzyme and quorum sensing signal molecules (including cell membrane fragments, periplasmic space enzyme complexes and the like) in the strain by adopting an immobilization technology to form a bioactive interface layer with the thickness of about 50-200nm.

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 invention provides a system for microbial decomposition and nitrification of fish manure and plant filtration, and relates to the technical field of data processing, which comprises the following steps: feeding a decomposed water body into a nitrification filter material layer through water permeable holes in a partition plate, and carrying out nitrification treatment by nitrifying bacteria; the water treatment layer is used for conveying the nitrified water body to a plant planting layer to complete water purification, monitoring the water outlet pressure and nitrate concentration, and generating a filter bag blockage early warning signal when the pressure reaches a preset threshold value; and the controller is used for reducing the flow of the water pump to prolong the residence time of water in the plant planting layer when the nitrate concentration reaches a preset threshold value based on the filter bag blockage early warning signal and the nitrate concentration monitoring data, and restoring the water pump to operate according to the final target flow when no early warning signal exists and the nitrate concentration is lower than the preset threshold value. The fish manure decomposition efficiency, the water purification quality and the accuracy and stability of overall operation are effectively improved.

The invention discloses an alpine region sewage treatment mechanical stirring strengthening device which comprises a base, a stirring assembly and a heating assembly, the top of the base is connected with a stirring bin through supporting legs, the stirring assembly is arranged in the stirring bin, and the stirring assembly comprises a hollow stirring shaft and a gearbox. The two sets of hollow stirring shafts are rotationally connected into the stirring bin through bearing seats, the heating assembly comprises an electric heating plate and an electric heating rod, and efficient transfer and uniform diffusion of heat are achieved through the dual effects of bottom conduction and internal radiation of the stirring bin; an electric heating plate at the bottom of the stirring bin is matched with a high-thermal-conductivity pad to form a global basic heating layer, so that sewage at the bottom area of the stirring bin cannot be frozen due to low temperature; the internal electrical bars rotate along with the stirring shaft to form a dynamic heating field, and the temperature of sewage in the bin is uniformly distributed by combining the convection effect of reverse stirring, so that the temperature of the sewage is effectively maintained in the optimal activity interval of functional microorganisms such as nitrifying bacteria.

The invention discloses a purification process of hexazinone production wastewater, and relates to the technical field of wastewater treatment. The process comprises the following steps: introducing wastewater of a hexazinone production process into an enamel microfiltration reactor for reaction, and filtering out pretreated wastewater; the pretreated wastewater is pumped into a graphite condensation type oxidation tower, a composite catalyst composed of a sodium methoxide methanol solution and methyl chloroformate is added for a reaction, and oxygenated wastewater is obtained; adjusting the pH value of the wastewater subjected to oxygen catalysis to 7.0-7.5, introducing the wastewater into a biological denitrification reaction tank, and adding a microbial agent compounded by nitrifying bacteria and denitrifying bacteria for reaction to obtain purified wastewater; refluxing 80% of the purified wastewater to a raw material preparation process for hexazinone production for reuse, and discharging the remaining 20% of the purified wastewater after being detected to be qualified; according to the invention, a grading process of pretreatment, catalytic oxidation, biological denitrification and reclaimed water reuse is designed, so that deep purification of high-ammonia-nitrogen COD wastewater is realized.

The utility model discloses a fish, mushroom and vegetable symbiotic system, including fishpond, soilless culture box and microbiological treatment component, the bottom of fishpond is provided with waste water discharge port, microbiological treatment component includes aerobic treatment unit and anoxic treatment unit, aerobic treatment unit includes aerobic treatment box, the liquid inlet of aerobic treatment box is communicated with waste water discharge port, and the liquid outlet of aerobic treatment box is communicated with anoxic treatment unit. When the wastewater is discharged into the aerobic treatment box, nitrifying bacteria in an aerobic state convert ammonia nitrogen into nitrate which can be absorbed by plants, and phosphorus-accumulating bacteria uptake phosphorus-containing pollutants in the wastewater and form flocculent sludge; the anoxic treatment unit comprises an anoxic treatment box, a liquid inlet in the anoxic treatment box is communicated with a liquid outlet in the aerobic treatment unit through a first connecting pipe, a filter plate is further arranged in the anoxic treatment unit, after flocculent sludge enters the anoxic treatment box, phosphorus-accumulating bacteria release inorganic phosphate which can be absorbed by plants in an anaerobic state, and the flocculent sludge enters the aerobic treatment box; nitrate and inorganic phosphate penetrate through the filter plate and then enter the soilless culture box.

The invention relates to a method for synergistically enhancing bank slope vegetation water quality purification through arbuscular mycorrhiza and nitrifying bacteria, and belongs to the technical field of water environment ecological management and ecological engineering. The method comprises the following three core steps: preparation of an arbuscular mycorrhiza-nitrifying bacteria immobilized complex microbial inoculant, construction of a bank slope vegetation rhizosphere microhabitat, and cooperative regulation and control of system stabilization and purification functions. According to the method, the rhizosphere microhabitat of the bank slope vegetation is actively intervened by artificially inoculating the fungicide formed by the arbuscular mycorrhiza and the nitrifying bacterium community, and the symbiotic system formed by the arbuscular mycorrhiza-nitrifying bacterium composite community and the plants is utilized, so that the method is environment-friendly, high in cost benefit, simple and stable in operation condition, easy to engineer and suitable for large-scale popularization and application. And an innovative solution is provided for realizing synergistic interaction of bank slope ecological restoration and water quality purification.

This utility model discloses a denitrification packing carrier for biological filters, belonging to the field of denitrification packing technology. It includes a packing matrix with multiple insertion and mounting cavities on its sidewalls and a mesh structure, microbial balls placed inside the packing matrix, and packing blocks located at each of the insertion and mounting cavities. Several packing blocks are attached to the sidewalls of the packing matrix, allowing it to contact wastewater from various directions. The activated carbon adsorption packing within the mesh packing blocks adsorbs the wastewater in the biological filter, while nitrifying bacteria, denitrifying bacteria, and polyphosphate-accumulating bacteria loaded on the microbial balls perform combined denitrification treatment. During the treatment process, the exothermic balls in each release cavity heat up upon contact with water, raising the temperature of the biological filter and thus promoting the denitrification reaction efficiency. This denitrification packing carrier for biological filters can efficiently and stably treat nitrogen pollutants in wastewater, achieving water purification goals.

The present application relates to the field of pesticide wastewater nitrogen removal equipment, specifically to a pesticide production wastewater total nitrogen detection and treatment equipment, which comprises a treatment tank, a driving motor is fixedly connected to the middle position of the top of the treatment tank, and the rotating end of the driving motor is fixedly connected with a transmission shaft, the inner top surface of the treatment tank is fixedly connected with an adjusting cylinder matched with the transmission shaft, and the equipment further comprises an aeration adjusting mechanism, which is movably installed between the surface of the adjusting cylinder and the surface of the transmission shaft, and the transmission shaft drives the aeration adjusting mechanism to operate to uniformly distribute oxygen in the treatment tank. The pesticide production wastewater total nitrogen detection and treatment equipment is composed of an aeration adjusting mechanism and a pollution cleaning mechanism; when the nitrifying bacteria in the treatment tank need to react through oxygen, the aeration component can rise, expand and rotate in the treatment tank under the action of the aeration mechanism, so that the oxygen is uniformly dispersed in the treatment tank, thereby improving the nitrogen removal treatment effect.

The utility model discloses a short-cut nitrification coupling anaerobic ammonia oxidation integrated reactor, a perforated plate is arranged in the reactor, and a first part for short-cut nitrification and a second part for anaerobic ammonia oxidation are respectively distributed on the upper side and the lower side of the perforated plate; sludge of nitrite bacteria is attached to the interior of the first part through a first filler so as to fix aerobic bacteria, and the first part is connected with an aeration source; anaerobic ammonia oxidizing bacteria are fixed in the second part through a second filler; the size of the filler is greater than the hole size of the perforated plate; the second part is provided with a muddy water backflow and separation module; the muddy water backflow and separation module comprises the muddy water separation area and a sludge backflow area which is integrally connected with the muddy water separation area; a water outlet pipe is connected into the mud-water separation area and is used for separating and discharging aged sludge. The reactor can stabilize the growth of dominant bacteria and improve the denitrification treatment effect.

The present application relates to feed additives and organic pollutant degradation technical field, specifically relates to a kind of modified biochar immobilized ZEN degradation bacteria microspheres and preparation method and application.The microsphere is by core material, inner layer wall material and outer layer wall material composition;Core material is by carrier, soluble starch and corn scab ketone degrading bacteria preparation;Carrier is by citric acid and octadecyl trimethylammonium chloride to biochar combined modification preparation;Corn scab ketone degrading bacteria is Bacillus Subtilis 168;Inner layer wall material is by sodium alginate and calcium chloride crosslinking preparation;Outer layer wall material is chitosan.The degradation bacteria microsphere of the present application can effectively maintain the activity of corn scab ketone degrading bacteria, combined with the adsorption of biochar and the biological detoxification of degradation bacteria, can realize the efficient degradation of corn scab ketone.

The invention belongs to the field of environmental material preparation, and discloses a multi-layer composite filler for nitrogen conversion and a preparation method and application thereof. The composite filler comprises an inner core layer, a middle layer and an outer layer which are sequentially connected from inside to outside, the inner core layer contains a mixture formed by denitrifying bacteria, agricultural and forestry waste biomass and soil; the middle layer is a biological membrane loaded with nitrifying bacteria and wraps the inner core layer; the outer layer is a zeolite layer and wraps the middle layer. The multi-layer composite filler can efficiently remove dissolvable nitrogen which is not completely converted due to rainfall in agricultural non-point source treatment, the adsorption effect is rapid and stable, and desorption is not prone to occurring.

This invention relates to the field of wastewater treatment technology, specifically to a short-range nitrifying bacterium and its application in wastewater denitrification treatment. The short-range nitrifying bacterium is taxonomically classified as *Klebsiella grimonella* (…). Klebsiella grimontii The strain, named A5, is deposited at the China Center for Type Culture Collection (CCTCC) with accession number M 2025642, dated March 31, 2025. This invention's short-cut nitrifying bacteria can oxidize ammonia nitrogen to nitrite nitrogen, preventing further oxidation of nitrite nitrogen to nitrate nitrogen. It can be used for short-cut nitrification treatment of wastewater, achieving efficient conversion of ammonia nitrogen to nitrite nitrogen even at high ammonia nitrogen concentrations and over a wide temperature and pH range, demonstrating promising application prospects in wastewater denitrification.

The application relates to the technical field of sewage treatment, in particular to a sulfur autotrophic denitrification and nitrogen removal treatment device, which comprises an integrated box, a second turnover plate rotatably installed at the front end of the integrated box, a first turnover plate rotatably installed at the edge position of the top end of the integrated box, and a PLC controller fixedly installed at the front end of the integrated box. The multiple treatments of the ultrafiltration membrane tube, the autotrophic denitrifying bacteria and the active carbon filter plate can guarantee the sewage treatment effect, can make the autotrophic denitrifying bacteria in a suitable survival environment, can guarantee the nitrogen removal effect, are energy-saving and environment-friendly, are convenient to use, can conveniently replace the active carbon filter plate, can guarantee the purification effect of water, can reduce the resistance received by the movable ring during the sliding process on the threaded screw rod in the process of replacing the active carbon filter plate, are favorable for the up-and-down movement of the sealing plate, and are favorable for the replacement of the active carbon filter plate.

This invention provides a denitrification treatment apparatus and denitrification treatment method that control a hydrogen oxidation denitrification reaction using hydrogen gas, which has high biocompatibility and can be produced even in a closed, isolated environment, and has effective denitrification capabilities in the treatment of aquaculture wastewater. [Solution] According to the present invention, a nitrate nitrogen-containing water denitrification treatment device is provided, comprising: a sealed treatment container containing a microbial carrier on which hydrogen oxidation denitrifying bacteria are immobilized; a hydrogen gas supply unit that supplies hydrogen gas to the gas phase inside the treatment container from the top of the treatment container; a pressure control unit that maintains the inside of the treatment container at atmospheric pressure; and a water spraying unit that sprays nitrate nitrogen-containing water onto the microbial carrier from the top of the treatment container.

An aeration tank and a sewage treatment system are characterized in that an anoxic regulation and control mechanism and an aerobic regulation and control mechanism are arranged in an aeration tank body, the anoxic regulation and control mechanism can create an anoxic environment around the anoxic regulation and control mechanism so that the area becomes an anoxic section, and the aerobic regulation and control mechanism creates an aerobic environment around the aerobic regulation and control mechanism so that the area forms an aerobic section; in the process that sewage flows along the channel, the sewage sequentially passes through the anoxic zone and the aerobic zone, in the anoxic zone, most nitrate radicals and nitrite radicals in the sewage are reduced into nitrogen by denitrifying bacteria in activated sludge, and nitrogen elements in the sewage are removed; in the aerobic section, most ammonium nitrogen in the sewage is converted into nitrate and nitrite by nitrifying bacteria in the activated sludge, and nitrogen in the sewage is further converted and removed; the denitrification effect of the anoxic section and the nitrification effect of the aerobic section are synergistically carried out, so that nitrogen elements in sewage can be more effectively removed, the denitrification efficiency is greatly improved, up-to-standard discharge of the sewage is ensured, and eutrophication pollution to a water body is reduced.

The present application relates to sewage biological treatment technical field, provide a kind of ammonia nitrogen wastewater short path nitrification method and application.The method includes: S100, mature autotrophic short path nitrification sludge is inoculated into reactor, and first mixed liquor is obtained;S200, water containing ammonium salt, bicarbonate and phosphate is transported into reactor by water inlet pump;S300, first mixed liquor is mixed with water by stirrer, and aeration reaction is carried out, and second mixed liquor is obtained;S400, stop stirring, aeration and pH control to second mixed liquor, carry out solid-liquid separation, and obtain treated water and sludge;S500, enable water pump, and treated water is uniformly discharged;S600, repeat steps S200-S500, add cerium chloride solution, and carry out long-term operation.The present application uses low concentration cerium to selectively enrich endogenous heterotrophic nitrosobacteria, and cooperates with autotrophic nitrosobacteria by cerium ion, to improve the accumulation rate of nitrite.