Method and device for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carrier and application

Abstract

The invention relates to an operation method and device for promoting efficient denitrification of aerobic nitrification and denitrification bacteria biological carriers and application, and the operation method comprises the following steps: arranging a process guarantee end water suspended matter concentration detector for adjustment and detection, entering a next process section microbial nest reaction device when the concentration of suspended matters in water is met, otherwise, returning to the front end for continuous guarantee pretreatment; a plurality of sections of coiled filler ropes are loaded in the biological nest, the filler ropes are used for accumulating, enriching and screening required beneficial thalli, the peripheries of the coiled filler ropes are filled with nano sustained-release microspheres, the sustained-release microspheres are rich in trace elements, sustained-release carbon sources, directional culture enzymes and sustained-release culture media, and various required sustained-release materials are effectively coated with a nano sustained-release microsphere carrier with a large specific surface area. The device has the advantages of intelligent regulation and control, impact resistance, low consumption, high efficiency, convenience in installation and operation, sludge reduction, reduction of external carbon sources, low carbon, energy conservation and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of biological carrier sewage treatment, in particular to a method, a device and an application of promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers.

[0002] With the country's increasing emphasis on water resources, water environment management has become a crucial component of comprehensive environmental governance. A series of measures have been implemented to address water scarcity and water pollution, addressing challenges such as large fluctuations in rural sewage quality and quantity, and complex composition. Multi-tank equipment increases floor space, energy consumption, and transportation and installation difficulties, hindering flexible deployment in various rural environments, industrial denitrification, and power plant denitrification. Chemical treatment processes also present significant secondary pollution and the storage of toxic substances.

[0003] High-concentration ammonia nitrogen wastewater refers to wastewater whose ammonia nitrogen content far exceeds the limits of natural water bodies and emission standards. Its existence poses a serious threat to the environment and ecosystem.

[0004] To this end, we have developed a method, device and application for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a method, device and application for promoting the efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers, which has the advantages of intelligent regulation, impact resistance, low energy consumption, improved denitrification efficiency, and easy operation.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers, comprising the following steps: S10. Set up buffer monitoring and adjustment pretreatment, turn on the power switch, wait for the intelligent control system to self-check, run at no load for 1-2 hours, check the operation of the components, start the water inlet pump, and the wastewater enters the pretreatment reactor. The intelligent control and monitoring SS equipment automatically controls the water inlet volume and pressure based on the monitoring data, and adjusts the pH value. When the monitored SS is less than 5ppm, gradually inject water into the biofilm-type bio-nest wastewater treatment unit. The bio-nest wastewater treatment unit is used in an ambient temperature of 7-40℃, a salinity of less than or equal to 5%, and a carbon-nitrogen ratio of less than 3. S20. A bio-biomass nest wastewater treatment device is provided with a cluster of bio-nests. The bio-nests comprise a first nest body and a second nest body with a mesh structure. A first conical cap structure is provided at one end of the first nest body, and a second conical cap structure is provided at one end of the second nest body. The first and second conical cap structures engage to form a spherical structure, which encloses the nano slow-release microsphere particles. Coiled filler ropes are enclosed between the first nest body and the first conical cap structure, and between the second nest body and the second conical cap structure, respectively. A hanging ring is provided at the edge of the first nest body, and the first and second nest bodies are detachably connected. S30. The coiled filler rope in step S20 is enriched with beneficial bacteria and forms a communal carrier, which carries a biofilm and performs simultaneous nitrification and denitrification. A composite bacterial agent is added to control the dissolved oxygen to 2-4 mg / L and the carbon-nitrogen ratio to less than 3, thereby performing simultaneous nitrification and denitrification. S40. The slow-release nanosphere particles in the biomass nest are placed in the first nest, with slow-release carbon source particles and slow-release trace element particles placed in the second nest, and slow-release directional culture enzyme particles and slow-release culture medium particles placed in the second nest, providing the nutrients required for the biofilm carried by the coiled filler rope; S50. The nest ball composed of the first nest body and the second nest body of the clustered biological nest is fixed on a thin long stuffing rope through a hanging ring and a short stuffing rope, serving as a centralized village community for each single biological nest.

[0007] Furthermore, the device for promoting the efficient denitrification operation method of aerobic nitrification and denitrification bacteria biological carriers includes an intelligent control and monitoring SS device, a film-forming biological nest sewage treatment device and an intelligent control system connected in sequence. The biological nest sewage treatment device is provided with an aeration system, and the biological nest is provided with gel microsphere particles or fixed biological seasoning ropes.

[0008] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. Intelligent control system: Based on online water quality monitoring, intelligent control monitors the concentration of suspended solids and adapts to fluctuations in inlet load.

[0009] 2. Low-energy, high-efficiency treatment: The efficient metabolism of nitrifying and denitrifying bacteria deeply removes pollutants such as nitrogen and phosphorus, ensuring consistent effluent quality. Optimized design and technology reduce energy consumption to 0.8-1.2 kWh / kg·TN compared to traditional processes.

[0010] 3. Strong adaptability: The enriched flocculent bacteria are resistant to shock and can cope with large fluctuations in the quality and quantity of rural sewage.

[0011] 4. Easy to operate: Intelligent control system, remote monitoring and operation are possible, reducing the difficulty of operation and maintenance.

[0012] 5. Small footprint and environmentally friendly: compact structure, saving rural land resources, low sludge production, and no secondary pollution.

[0013] 6. Easy to transport and install: overall or modular design, easy to transport and on-site assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a process flow chart of the method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Nitrification: Wastewater to be treated enters the integrated BioNest wastewater treatment system through the inlet system. Under the abundant oxygen provided by the aeration system, aerobic microorganisms carry out nitrification reactions within the biofilm. Ammonia nitrogen is first oxidized to nitrite nitrogen by ammonia-oxidizing bacteria, which is then further oxidized to nitrate nitrogen by nitrite-oxidizing bacteria. During this process, the microorganisms use oxygen to gradually convert ammonia nitrogen into high-valent nitrogen oxides, achieving initial removal of ammonia nitrogen.

[0017] Denitrification: The unique bacterial colonies formed on the biological filler membrane and the unique aerobic denitrifying bacteria use the organic matter in the wastewater or a small amount of external carbon source as electron donors to reduce the nitrate nitrogen and nitrite nitrogen in the wastewater into nitrogen gas and release it into the atmosphere, thereby achieving the removal of total nitrogen.

[0018] Figure 1 A method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers comprises the following steps: S10. Set up buffer monitoring and adjustment pretreatment, turn on the power switch, wait for the intelligent control system to self-check, run at no load for 1 to 2 hours, check the operation of the components, start the water pump, and the wastewater enters the pretreatment reactor (anaerobic water collection well). The intelligent control and monitoring SS equipment (SS, suspended solid suspended solid concentration) automatically controls the water inlet and pressure according to the monitoring data, and adjusts the pH value. When the monitored SS is less than 5ppm, water is gradually injected into the biofilm-type bio-nest sewage treatment device. The ambient temperature used by the bio-nest sewage treatment device is 7 to 40℃, the salinity is less than or equal to 5%, and the carbon-nitrogen ratio is less than 3; the ambient temperature is preferably 7℃, 10℃, 15℃, 20℃, 25℃, 30℃ or 40℃. The denitrification treatment capacity at 25℃ is higher than that at 7℃ and 40℃.

[0019] S20. The bio-biomass biomass wastewater treatment system features clustered biomass nests, each comprising a mesh-structured first nest and a second nest. A first conical cap structure is located at one end of the first nest, while a second conical cap structure is located at one end of the second nest. The first and second conical cap structures snap together to form a spherical structure, enclosing the nano-slow-release microspheres. The conical cap structure separates the nano-slow-release microspheres from the first and second nests. Coiled packing ropes are enclosed between the first nest and the first conical cap structure, and between the second nest and the second conical cap structure, respectively. Hanging loops are provided at the edges of the first nest, allowing for detachable connections between the first and second nests, such as snap-on or threaded connections. Each biomass nest is connected by a short packing rope attached to the hanging loops. This prevents fouling of the coiled bio-slow-release packing ropes and the large-surface-area nano-slow-release microspheres. The nano-slow-release microspheres utilize zeolite as the slow-release carrier, as the zeolite's large surface area effectively coats the desired slow-release material. The specific surface area of ​​the slow-release material carrier in the first and second nests is 620-740 square meters per gram, which prolongs the slow-release period and releases rich nutrients. During aerobic nitrification and denitrification, microorganisms are enriched around the filler membrane, attracting them to gather and grow, forming bacterial colonies, providing a microbial reaction site and improving microbial degradation efficiency. The biological nest also contains the slow-release carrier for the nutrients required by the microorganisms.

[0020] S30. The coiled filler rope in step S20 is enriched with beneficial bacteria and forms a colony carrier, which carries a biofilm and performs simultaneous nitrification and denitrification. Autotrophic nitrifying bacteria, such as Nitrosomonas, and denitrifying bacteria, such as Pseudomonas stutzeri and Thauera, convert nitrate (NO3 - ) is reduced to nitrogen (N2). A composite bacterial agent is added to control the dissolved oxygen to 2-4 mg / L and the carbon-nitrogen ratio to less than 3, allowing for simultaneous nitrification and denitrification.

[0021] S40. The nano slow-release microsphere particles in the clustered biological nest, slow-release carbon source particles and slow-release trace element particles are placed in the first nest, and slow-release directional culture enzyme particles and slow-release culture medium particles are placed in the second nest, providing the nutrients needed by the biofilm carried on the coiled filler rope.

[0022] S50. The nest ball, consisting of the first and second nests of the clustered bio-nest, is secured to a long, slender packing rope via a loop and short packing rope. Each individual bio-nest acts as a centralized village, further enhancing the aggregation and reproduction capabilities of the entire system. The bio-nest wastewater flows back into the bio-nest wastewater treatment plant through internal recirculation. The sludge is pumped into the anaerobic collection well for further anaerobic reaction. The treated wastewater then enters the constructed wetland. The effluent from the constructed wetland flows back into the anaerobic collection well, from where it flows into the filter tank. The filter tank wastewater is backwashed back into the anaerobic collection well before being disinfected and discharged to standards. The biofilm within the nest ball of the microbial reactor expands, increasing its thickness and forming a microbial system. The inner layers of the first and second nests release nutrients, the coiled packing ropes expand, and the long and short packing ropes enrich and expand the reaction surface population, removing nitrogen and phosphorus from the wastewater. The biofilm thickness in the microbial reactor ranges from 2 to 3 mm. As the biofilm thickness increases, the inner layer becomes anaerobic, removing nitrogen and phosphorus from the equipment. The biofilm thickness of the microbial reactor is preferably 2mm, 2.5mm, or 3mm. As the biofilm thickness increases, the inner layer becomes anaerobic, enabling the equipment to remove nitrogen and phosphorus. The BioNest wastewater treatment system has a total nitrogen removal rate of greater than or equal to 95%, and the BioNest density is adjusted accordingly based on the water volume treated.

[0023] An apparatus for promoting efficient denitrification using aerobic nitrification and denitrification bacteria bio-carriers comprises a sequentially connected intelligent control and monitoring SS equipment, a bio-biofilm-forming wastewater treatment system, and an intelligent control system. The bio-biofilm-forming wastewater treatment system is equipped with an aeration system, and the bio-biofilm-forming wastewater treatment system is equipped with gel microspheres or fixed bio-seasoning ropes. The intelligent control system includes a PLC controller, which is electrically connected to the intelligent control and monitoring SS equipment and the aeration system. The gel microspheres are produced by an emulsion cross-linking method and have a particle size of 1 to 3 mm. 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm are preferred. Larger particle sizes require more composite bacterial agents and are more conducive to biofilm formation.

[0024] The application of the device to promote the efficient denitrification operation method of aerobic nitrification and denitrification bacteria biological carriers. The device to promote the efficient denitrification operation method of aerobic nitrification and denitrification bacteria biological carriers is applied to the integrated bio-nest sewage treatment device with a temperature greater than or equal to 7°C, a salinity less than or equal to 5%, a carbon-nitrogen ratio less than 3, biochemical tail water or low-concentration deep-treated wastewater that does not meet the standards.

[0025] Under the conditions of influent TN concentration of 500mg / L and C / N=2, the TN removal rate remained stable at over 95% after 30 days of continuous operation. The denitrification performance remained stable even when the influent TN concentration fluctuated by ±50% and the pH range was 6-9.

[0026] Add a composite bacterial agent and control the dissolved oxygen level to 2-4 mg / L and the carbon-nitrogen ratio to less than 3 through the aeration system. The dissolved oxygen concentration is preferably 2 mg / L, 3 mg / L, or 4 mg / L. Increasing the dissolved oxygen concentration promotes biofilm formation. Simultaneous nitrification and denitrification are carried out. The carrier of the composite bacterial agent is gel microsphere particles.

[0027] The sewage from the microbial reaction pool enters the microbial reaction pool again through internal reflux, and the sludge is pumped into the anaerobic water collection well equipped with fillers through a water pump for another anaerobic reaction. The treated sewage then enters the artificial wetland, and the effluent from the artificial wetland flows back to the anaerobic water collection well, and then flows from the artificial wetland into the filter pool. The sewage from the filter pool flows back to the anaerobic water collection well through backwash water, and finally is discharged after disinfection to meet the standards. The integrated bio-nest sewage treatment device has a total nitrogen removal rate greater than or equal to 95%, preferably 95% to 98%, and ammonia nitrogen (NH4 + -N) removal rate is 98% to 99%, nitrate (N03 - -N) removal rate is 95% to 98%. The water treatment volume is 0.5 to 10 m³ / h.

[0028] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers, characterized in that: The following steps are involved: S10. Set up buffer monitoring and adjustment pretreatment, turn on the power switch, wait for the intelligent control system to self-check, run at no load for 1-2 hours, check the operation of the components, start the water inlet pump, and the wastewater enters the pretreatment reactor. The intelligent control and monitoring SS equipment automatically controls the water inlet volume and pressure based on the monitoring data, and adjusts the pH value. When the monitored SS is less than 5ppm, gradually inject water into the biofilm-type bio-nest wastewater treatment unit. The bio-nest wastewater treatment unit is used in an ambient temperature of 7-40℃, a salinity of less than or equal to 5%, and a carbon-nitrogen ratio of less than 3. S20. A bio-biomass nest wastewater treatment device is provided with a cluster of bio-nests. The bio-nests comprise a first nest body and a second nest body with a mesh structure. A first conical cap structure is provided at one end of the first nest body, and a second conical cap structure is provided at one end of the second nest body. The first and second conical cap structures engage to form a spherical structure, which encloses the nano slow-release microsphere particles. Coiled filler ropes are enclosed between the first nest body and the first conical cap structure, and between the second nest body and the second conical cap structure, respectively. A hanging ring is provided at the edge of the first nest body, and the first and second nest bodies are detachably connected. S30. The coiled filler rope in step S20 is enriched with beneficial bacteria and forms a communal carrier, which carries a biofilm and performs simultaneous nitrification and denitrification. A composite bacterial agent is added to control the dissolved oxygen to 2-4 mg / L and the carbon-nitrogen ratio to less than 3, thereby performing simultaneous nitrification and denitrification. S40. The slow-release nanosphere particles in the biomass nest are placed in the first nest, with slow-release carbon source particles and slow-release trace element particles placed in the second nest, and slow-release directional culture enzyme particles and slow-release culture medium particles placed in the second nest, providing the nutrients required for the biofilm carried by the coiled filler rope; S50. The nest ball composed of the first and second nest bodies of the clustered biological nest is fixed on a thin long filler rope through a hanging ring and a short filler rope. As each single biological nest is a centralized village community, the sewage of the biological nest re-enters the biological nest sewage treatment device through internal reflow, and the sludge is pumped into the anaerobic water collection well through a water pump for anaerobic reaction again. Then the treated sewage enters the artificial wetland, and the effluent of the artificial wetland flows back to the anaerobic water collection well, and then flows from the artificial wetland into the filter pool. The sewage of the filter pool is returned to the anaerobic water collection well through backwash water, and finally is discharged after disinfection to meet the standards.

2. The method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 1, characterized in that: To ensure that the biological coiled filler rope and the nano slow-release microsphere particles with a large specific surface area are not blocked by dirt in step S20, the nano slow-release microsphere particles use zeolite as a slow-release carrier, and the large specific surface area of ​​zeolite effectively coats the required slow-release material.

3. The method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 2, characterized in that: In step S20, during aerobic nitrification and denitrification, microorganisms are enriched around the filler membrane and induced to gather, reproduce and form bacterial colonies, and a slow-release carrier of nutrients required by the microorganisms is placed in the biological nest.

4. The method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 2, characterized in that: The specific surface area of ​​the sustained-release material carriers in the first nest and the second nest is 620-740 m2 / g.

5. The method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 4, characterized in that: In step S50, the biofilm in the nest ball of the microbial reaction tank diffuses the bacteria, increasing the thickness of the entire biofilm to form a microbial system, the inner layers of the first nest and the second nest release nutrients, the coiled filler ropes expand, and the long filler ropes and short filler ropes enrich and expand the reaction surface population to remove nitrogen and phosphorus from the wastewater.

6. The method for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 1, characterized in that: In step S50, the total nitrogen removal rate of the bio-nest sewage treatment plant is greater than or equal to 95%, and the bio-nest density is arranged according to the size of the bio-nest sewage treatment plant based on the amount of treated water.

7. The device for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to any one of claims 1 to 6, characterized in that: It includes an intelligent control and monitoring SS device, a biofilm-type biological nest sewage treatment device and an intelligent control system that are connected in sequence. The biological nest sewage treatment device is provided with an aeration system, and the biological nest is provided with gel microsphere particles or fixed biological seasoning ropes.

8. The device for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carrier according to claim 7, characterized in that: The gel microsphere particles are prepared by an emulsification cross-linking method and have a particle size of 1 to 3 mm.

9. Application of the device for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carriers according to claim 8, characterized in that: The device for promoting the efficient denitrification operation method of aerobic nitrification and denitrification bacteria biological carriers is applied to an integrated bio-nest sewage treatment device with a temperature greater than or equal to 7° C., a salinity less than or equal to 5%, and a carbon-nitrogen ratio less than 3.

10. Application of the device for promoting efficient denitrification operation of aerobic nitrification and denitrification bacteria biological carrier according to claim 9, characterized in that: The integrated bio-nest sewage treatment device treats biochemical tail water or low-concentration deep-treated wastewater that does not meet the standards.

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