242 results about "Nitrifying bacteria" patented technology

The present application relates to the field of municipal wastewater treatment, and particularly relates to a highway service area wastewater treatment device and method based on AOOA-MBBR process. The device comprises a first anoxic tank, a first aerobic tank, a second aerobic tank and a second anoxic tank connected in sequence, and is filled with MBBR filler respectively, and the volume of the filled MBBR filler is taken as the effective volume; the first aerobic tank and the second aerobic tank are respectively provided with an aeration device; the first anoxic tank is used for inoculating hydrolytic bacteria and denitrifying bacteria; the first aerobic tank is used for inoculating hydrolytic bacteria, nitrifying bacteria and denitrifying bacteria; the second aerobic tank is used for inoculating nitrifying bacteria, and the second anoxic tank is used for inoculating hydrolytic bacteria and denitrifying bacteria; the second aerobic tank is connected with the first anoxic tank through a reflux pipe, and the reflux pipe is provided with a reflux power assembly. The present application solves the problems of existing highway service wastewater treatment with extremely low carbon-nitrogen ratio, such as the need for additional carbon source / electron donor, high operation cost, poor denitrification effect and high sludge yield.

The invention relates to a soil conditioner based on nitrification inhibition and a soil acid control method, and belongs to the technical field of soil conditioning, the soil conditioner comprises the following components by weight: 20-22 parts of humic acid, 32-36 parts of syringic acid-linoleic acid modified porous hydroxyapatite, 4-5 parts of complete nitrifying bacteria, 2-5 parts of syringic acid, and 2.8-4.2 parts of sodium carboxymethyl cellulose. According to the technical scheme, syringic acid and linoleic acid serve as nitrification inhibitors, the nitrification inhibition rate can be effectively increased, ecological niches of ammonia-oxidizing archaea and ammonia-oxidizing bacteria can be reduced through competitive occupation due to addition of complete nitrifying bacteria, the nitrification rate of the ammonia-oxidizing archaea and the ammonia-oxidizing bacteria is inhibited, and N2O emission is reduced. Humic acid and hydroxyapatite can be used as pH buffer substances to regulate and control soil acidity, aluminum toxicity can be relieved, and physical and chemical properties of soil can be improved; meanwhile, the complete nitrifying bacteria can be ensured to have relatively high activity under the condition that the pH is 5.5-6.5.

The application discloses a method for efficient denitrification and decarburization of kitchen waste and sludge co-fermentation anaerobic digestion effluent, which removes part of COD and ammonia nitrogen in the influent sludge by using a first SNAD, and maintains a certain amount of free ammonia of a certain concentration due to the high concentration of ammonia nitrogen and the high pH of the influent, so as to maintain the inhibition effect on nitrifying bacteria and ensure the conversion of part of the ammonia nitrogen into nitrite nitrogen, and the high activity of anaerobic ammonia oxidation bacteria is ensured in the first SNAD by limiting the aeration amount, so that the ammonia nitrogen and nitrite can be further removed; the effluent enters a nitrification tank, and the ammonia nitrogen is nitrified into nitrate nitrogen under the condition of nitrifying bacteria and sufficient aeration amount, and then enters a denitrification tank, and the denitrification process is carried out under the condition of heterotrophic denitrifying bacteria and sufficient carbon source, so that most of the nitrate nitrogen in the system is converted into nitrogen gas and removed, finally, the clear liquid is discharged after being filtered by an MBR membrane in a membrane tank, so as to achieve the purpose of efficient denitrification and decarburization of kitchen waste anaerobic digestion effluent.

The invention provides a sewage enhanced nitrogen and phosphorus removal process based on microbial community interaction, and belongs to the field of sewage treatment. The method comprises the steps of sewage pretreatment, anaerobic phosphorus release, anoxic denitrification, aerobic nitrification phosphorus uptake and the like, an anaerobic-anoxic-aerobic three-section reactor is adopted, and proper ecological nichs are provided for phosphorus-accumulating bacteria, denitrifying bacteria and nitrifying bacteria by accurately regulating and controlling parameters such as dissolved oxygen, hydraulic retention time and carbon nitrogen ratio of each section, so that the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded, and the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded. The competition problem of biological nitrogen removal and biological phosphorus removal is effectively relieved, the nitrogen and phosphorus removal efficiency is remarkably improved, the total nitrogen removal rate reaches 85% or above, and the total phosphorus removal rate exceeds 90%; straw-based modified charcoal is adopted as a carrier, so that the loading capacity and activity of functional flora are improved, and flora interaction is enhanced; meanwhile, resource utilization of agricultural wastes is realized, and the method has remarkable environmental benefits and economic advantages.

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.

The present application relates to sewage treatment technical field, especially a kind of composite biological additive for high-nitrogen sewage advanced treatment.The present application obtains a high-quality fermentation liquor by using specific enzymolysis sequence enzymolysis agricultural derivative, wherein it contains more reducing sugar and organic small molecule acid, and COD equivalent is extremely high, is 2~5 times of the carbon source COD used by conventional sewage plant, and has excellent effect when used as biological carbon source for sewage treatment;Meanwhile, the fermentation liquor is compounded and adjusted with AOB bacterial agent to obtain composite biological additive, the composite biological additive can provide sufficient high-quality nutrient ingredients for denitrifying bacteria, and also inoculate AOB bacteria for sewage treatment system, so that AOB bacteria in the system gradually develop into main nitrosation bacteria group, and have excellent enhanced denitrification effect on high-nitrogen sewage, and have wide application prospect.

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.

The invention belongs to the technical field of sewage treatment, and discloses a rapid denitrification device for micro-polluted river water, which comprises a denitrification mechanism, the denitrification mechanism comprises a denitrification tower, and an aerobic nitrification layer, an anoxic denitrification layer and an adsorption insurance layer are respectively arranged in the denitrification tower from top to bottom. The system has the following beneficial effects that river water enters the denitrification tower and sequentially flows through the aerobic nitrification layer, the anoxic denitrification layer and the adsorption insurance layer, the aerobic nitrification layer is aerated to supply oxygen, and nitrifying bacteria accelerate conversion of ammonia nitrogen into nitrate; denitrifying bacteria in the anoxic denitrification layer convert nitrate into nitrogen, and the two layers synergistically improve the efficiency; the adsorption insurance layer is stable in residual substance adsorption effect. The porous partition plate water permeable holes are smaller than the filler particle size, smooth circulation of water flow is guaranteed, and rapid and efficient denitrification is achieved.

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.

1. The name of the design product: aquarium filter material (gear bacteria breeding column). 2. The use of the design product: purification, filtration, adsorption and cultivation of nitrifying bacteria for aquariums. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application discloses a method for efficiently removing sulfonamide antibiotics by flocculent sludge domestication, and belongs to the technical field of sewage treatment. The method greatly improves the removal rate of sulfonamide antibiotics by adjusting the culture conditions of activated sludge in a traditional activated sludge system. The method can effectively remove antibiotics, has the characteristics of simple operation, low treatment cost and large-scale operation, and the removal of pollutants is mainly realized by sludge adsorption and microbial degradation. The important functional bacteria, nitrifying bacteria, in the activated sludge treatment process can improve the removal efficiency of antibiotics including antibiotic drugs through co-metabolism while completing nitrification, so that the functional bacteria can be enriched by inoculating activated sludge and domesticating the sludge into flocculent form, and the functional bacteria are used to efficiently remove sulfonamide antibiotics.

This invention discloses a heterotrophic-aerobic denitrifying bacterium C-3 and its applications. The heterotrophic-aerobic denitrifying bacterium C-3 is deposited at the China General Microbiological Culture Collection Center (CGMCC), classified as *Brevundimonas naejangsanensis*, with accession number CGMCC No. 31729, and deposited on August 23, 2024. The heterotrophic-aerobic denitrifying vesicular *Brevundimonas naejangsanensis* strain C-3 provided by this invention exhibits excellent nitrate nitrogen removal efficiency (100%) under aerobic conditions using sodium acetate as a carbon source, a C / N mass ratio of 10, a pH of 7, a temperature of 30℃, and a rotation speed of 200 r / min. In actual aquaculture wastewater, it demonstrates excellent removal effects on nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, and total nitrogen. Furthermore, this strain exhibits high safety and has significant application value in treating aquaculture wastewater.

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.

The present application relates to sewage biological treatment technology field, disclose a kind of continuous flow aerobic granular sludge rapid formation and stable regulation and control method, device, method is in the peak value window of organic substrate concentration of influent in anaerobic selection area Pulse light stress is applied, trigger microbial stress defense, drive microbial self-aggregation and excrete extracellular polymer substance and form granular precursor;Granular precursor is strengthened after structure in aerobic reaction zone, by two-stage hydraulic screening respectively according to settling performance, density difference separates aggregate, again low-density floc rich in phosphorus-accumulating bacteria is backflowed to anaerobic zone, high-density granules rich in nitrifying bacteria are backflowed to aerobic zone, realize functional flora directional ecological niche adaptation.The present application replaces high-intensity hydraulic shear with light stress to drive granulation, can greatly shorten start-up period, reduce operating energy consumption, inhibit filamentous bacteria expansion from source, realize the significant improvement of simultaneous nitrification and phosphorus removal 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: Bacterial Brick. 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 image or photograph that best illustrates the key design points: Design 1 3D view. 5. Design 1 is designated as the basic design.

The present application relates to the field of environmental protection technology, provide a kind of nitrifying bacteria growth rate prediction method and computer readable storage medium, the present application obtains initial temperature, critical temperature and boundary temperature based on the species of nitrifying bacteria, and obtains the boundary growth rate of nitrifying bacteria at boundary temperature by the actual growth of nitrifying bacteria, and based on boundary growth rate and calculated growth rate, by fitting, obtain the boundary temperature growth model of nitrifying bacteria and predict the growth rate of nitrifying bacteria, so that the growth rate of nitrifying bacteria can be relatively accurately predicted by more apparent temperature, so as to measure the current sewage treatment capacity, improve the control efficiency of effluent quality control.

The utility model discloses a kind of fry breeding box, by physical filtration area, biological filtration area, oxygen supply system and intelligent control system are integrated design, realize the efficient purification and recycling of aquaculture water body. Physical filtration area adopts the design of slanted bottom cooperation automatic sewage collection structure, biological filtration area is maintained water quality stability by nitrifying bacteria automatic addition and combined filter material, oxygen supply and disinfection module work together to guarantee oxygen safety, intelligent control system monitors environmental parameter in real time and executes protective control strategy, effectively solve the technical problems of traditional breeding box maintenance frequently, water quality fluctuation, fry survival rate is low, with the technical advantages of high filtration efficiency, convenient operation, water quality stable controllable.

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 provides a fish and vegetable symbiotic intelligent system which comprises three-level linkage units, namely an aquaculture area, a nitrifying bacteria cultivation area and a tidal water culture planting area, and each area is provided with an independent function module and is integrated with a central control unit. The data monitoring center is connected with the aquaculture area function module through an industrial bus and issues an environment regulation and control instruction. The aquaculture area central control unit drives an underwater air injection device to adjust dissolved oxygen based on the instruction, and a nitrification instruction is generated and sent to the nitrifying bacterium cultivation area. After receiving the instruction, the nitrifying bacteria cultivation area controls the flow speed and temperature of a circulating sprayer, generates an irrigation instruction and sends the irrigation instruction to the tidal water culture planting area. The central control unit of the tidal hydroponic planting area controls an overflow siphon according to the irrigation instruction, and tidal irrigation is achieved by connecting a water level sensor. According to the system, efficient collaborative operation of aquaculture, nitrobacterium cultivation and tidal water culture planting can be achieved, and the automation degree, the resource utilization efficiency and the operation stability of the system are improved.

The invention discloses an inhibitor for preventing excessive growth of towel gourd strips and application of the inhibitor, and relates to the technical field of planting. The inhibitor comprises the following components: phosphatidic acid, nitrifying bacteria and lignin, wherein the mass ratio of phosphatidic acid to nitrifying bacteria to lignin is (15-20): (16-20): (8-10). The phosphatidic acid and the nitrifying bacteria are introduced, so that the ammonium nitrogen absorption degree of towel gourd roots can be reduced, excessive growth of towel gourds is effectively prevented, the adverse effects of the inhibitor on the growth and quality of the towel gourds are avoided, and the method is low in cost, simple in process and easy to popularize and use.

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.

1. The name of the design product: mineral bacteria culture ball. 2. The use of the design product: aquarium, fish pond filter, culture nitrifying bacteria. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.