A method for deodorization and ammonia control in livestock and poultry breeding by synergizing micro-acidic hypochlorous acid atomization and low-temperature plasma

Abstract

This invention discloses a method for deodorizing and controlling ammonia in livestock and poultry farming through the synergistic application of slightly acidic hypochlorous acid atomization and low-temperature plasma. It relates to the field of livestock and poultry farm waste gas treatment and environmental disease prevention technology. The method includes: zoned control of pollution sources; graded and precise liquid atomization; directional oxidation treatment with hypochlorous acid; synergistic deep purification with plasma; simultaneous sterilization and disease prevention while livestock are present; and intelligent closed-loop pressure stabilization operation. This invention achieves the degradation and removal of ammonia and malodorous gases from the source in livestock farming scenarios through the synergistic coupling technology of slightly acidic hypochlorous acid atomization oxidation and low-temperature plasma high-energy degradation. Simultaneously, it eliminates bacteria and viruses in the pens, achieving a three-in-one approach of deodorization, ammonia control, and disease prevention. It allows for continuous livestock operation, leaving no residue, causing no irritation, and is environmentally friendly. It is suitable for various large-scale livestock and poultry farming scenarios and meets the latest environmental management standards.

Description

Technical Field

[0001] This invention belongs to the field of livestock and poultry breeding waste gas treatment and environmental disease prevention technology, and in particular relates to a method for deodorizing and controlling ammonia in livestock and poultry breeding through the synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma. Background Technology

[0002] In recent years, my country's livestock and poultry farming industry has seen a significant increase in intensive and large-scale development, with large-scale farming becoming the mainstream model. However, the accompanying problems of ammonia and compound odor pollution have become increasingly prominent, becoming a core bottleneck restricting the green and sustainable development of animal husbandry, triggering environmental complaints and disputes in the surrounding areas, and seriously threatening the health of livestock and poultry farmers and public health safety.

[0003] The "Technical Guidelines for Ammonia Emission Calculation of Large-Scale Livestock and Poultry Farms (Trial)" (HJ 1434-2025), which officially came into effect on March 1, 2026, includes all large-scale pig farms, dairy cow farms, beef cattle farms, layer chicken farms, and broiler farms with an annual output of 500 or more pigs in the scope of mandatory environmental protection control. It puts forward refined, normalized, and rigid requirements for ammonia emission calculation, waste gas treatment, and environmental protection inspection in the breeding scene. The industry's traditional extensive breeding pollution control model can no longer be adapted to the new standards.

[0004] Odor pollution sources are highly concentrated in large-scale livestock and poultry farming settings. Ammonia volatilization accounts for 65% of emissions from manure disposal areas and 25% from inside livestock sheds. The pollution sources are concentrated, and the exhaust gas composition is complex, mainly containing ammonia, hydrogen sulfide, methanethiol, volatile organic compounds (VOCs), and other odorous pollutants. Under high summer temperatures, ammonia concentrations inside livestock sheds in large-scale farms can reach 100–500 ppm, far exceeding the safety limits stipulated in the "Environmental Parameters and Management of Large-Scale Pig Farms" (GB / T 17824.3-2008) and the "Environmental Quality Standards for Livestock and Poultry Farms" (NY / T 388-1999). Extremely high concentrations of ammonia not only irritate the respiratory mucosa of livestock and poultry, reduce their immunity, leading to decreased feed utilization, high incidence of diseases, and reduced farming productivity, but also harm the health of livestock workers, easily causing occupational diseases such as coughs, rhinitis, and respiratory inflammation. Meanwhile, ammonia diffuses into the atmosphere and participates in secondary photochemical reactions, generating PM2.5 fine particulate matter, which exacerbates regional air pollution. The stench from livestock farming is also a core cause of complaints from surrounding residents. In some densely populated livestock farming areas, stench-related complaints account for more than 40% of all petitions, seriously hindering the high-quality development of the industry.

[0005] Currently, mainstream deodorization and ammonia control technologies in the industry have significant technical shortcomings, failing to simultaneously address treatment effectiveness, adaptability to livestock farming, and environmental compliance requirements. Physical adsorption methods, represented by activated carbon adsorption, have high equipment investment costs, frequent consumable replacements, and heavy maintenance workloads. They can only adsorb surface odors and cannot completely degrade malodorous pollutants; after adsorption saturation, they are prone to desorption and rebound, causing secondary pollution. Chemical spraying methods consume large amounts of chemicals and have high long-term operating costs. Conventional chemical agents are corrosive and irritating, making it impossible to operate with livestock present, easily damaging livestock mucous membranes and disrupting the farming ecosystem. Biological deodorization methods rely on microbial degradation principles, but are greatly affected by environmental temperature, humidity, and ventilation conditions, resulting in unstable deodorization and ammonia control efficiency. They are poorly adapted to the high airflow and high-concentration ammonia conditions in livestock farms, failing to achieve efficient and stable treatment.

[0006] More importantly, existing traditional technologies generally suffer from single functions and technological disconnect. They can only achieve deodorization or ammonia control, but cannot simultaneously carry out epidemic prevention and sterilization of livestock pens. This results in a technological disconnect where "deodorization does not prevent disease, and disease prevention cannot deodorize." Furthermore, most treatment technologies cannot be used while livestock are present, requiring the pens to be emptied and livestock operations to be suspended, which seriously affects the continuity of farming and production efficiency. The industry urgently needs a new treatment technology that is safe, efficient, residue-free, can be used while livestock are present, and integrates deodorization, ammonia control, and sterilization functions. Summary of the Invention

[0007] The purpose of this invention is to provide a method for deodorizing and controlling ammonia in livestock and poultry farming through the synergistic coupling of slightly acidic hypochlorous acid atomization and low-temperature plasma. By using the synergistic coupling technology of slightly acidic hypochlorous acid atomization oxidation and low-temperature plasma high-energy degradation, ammonia and malodor in the farming scene are degraded and removed at the source. At the same time, bacteria and viruses in the pens are disinfected, achieving a three-in-one approach of deodorization, ammonia control, and disease prevention. It can be used with livestock throughout the process, leaving no residue, causing no irritation, and is environmentally friendly. It is suitable for various large-scale livestock and poultry farming scenarios and meets the latest environmental management standards.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A method for deodorizing and controlling ammonia in livestock and poultry farming using a combination of slightly acidic hypochlorous acid atomization and low-temperature plasma, comprising the following steps: S1. Zoned control of pollution sources: Through zoned pipe spraying units, atomization outlets are arranged at a height of 1.2 to 1.8m above the ground in the livestock breeding area, and purification points are arranged at a height of 0.5 to 1.0m above the manure surface in the manure and sewage stacking and treatment area to achieve precise coverage of the core odor source. S2. Graded Precision Liquid Preparation and Atomization: The intelligent control unit adjusts the hypochlorous acid concentration according to the real-time ammonia concentration. When the ammonia concentration is <50ppm, 50-100mg / L hypochlorous acid is prepared; when the ammonia concentration is 50ppm≤100ppm≤100ppm, 100-150mg / L hypochlorous acid is prepared; and when the ammonia concentration is >100ppm, 150-200mg / L hypochlorous acid is prepared. The hypochlorous acid is then atomized by ultrasonic waves to form 0-10μm small molecular particles that diffuse into the aquaculture space. S3. Hypochlorous acid directional oxidation treatment: Atomized slightly acidic hypochlorous acid undergoes a multi-stage directional oxidation and decomposition reaction with ammonia in the air, completely degrading ammonia into harmless nitrogen, water and trace salts; S4. Plasma Synergistic Deep Purification: The low-temperature plasma purification unit generates active particles that break the chemical bonds of malodorous molecules such as hydrogen sulfide and VOCs through high-energy electron dissociation, free radical oxidation, and ionic reactions, thus completely decomposing them into harmless small molecules such as carbon dioxide, water, and nitrogen. S5. Synchronous animal sterilization and disease prevention: Utilizing the properties of hypochlorous acid to penetrate bacterial cell walls and oxidize microbial enzymes and genetic material, combined with the oxidative disinfection effect of plasma free radicals, it kills bacteria and viruses in the air and on the surface of objects in the pen. The entire process of animal sterilization is non-irritating and leaves no residue. S6 Intelligent closed-loop stable operation: Real-time monitoring of environmental indicators, dynamic fine-tuning of atomization volume and plasma power, maintaining the ammonia concentration in the enclosure below 20ppm.

[0009] In this invention, a multi-stage directional reaction is utilized between hypochlorous acid and ammonia: NH3 + HClO → NH2Cl + H2O NH₂Cl + HClO → NHCl₂ + H₂O 2NH₂Cl + HClO → N₂ + 3HCl + H₂O This process achieves the step-by-step degradation of ammonia; simultaneously, the plasma equipment uses high-voltage discharge to break down the air / exhaust gas, generating a large number of high-energy electrons, positive and negative ions, and free radicals (•OH, •O, O3, O2). - Active particles, such as excited-state molecules, interact with odor molecules (ammonia, hydrogen sulfide, VOCs, etc.) through electron bombardment, free radical oxidation, and ionic reactions, directly breaking molecular chemical bonds or initiating chain oxidation, ultimately decomposing malodorous molecules into harmless small molecules such as CO2, H2O, and N2, thus eliminating odor at its source.

[0010] In a preferred embodiment of the present invention, in step S4, the mixing ratio of hypochlorous acid atomized particles to plasma active particles is 1:3 to 1:5.

[0011] As a preferred embodiment of the present invention, in step S5, during normal operation of the livestock, the concentration of hypochlorous acid is controlled to be ≤150mg / L, and the plasma output power is reduced by 20% to 30% simultaneously.

[0012] As a preferred embodiment of the present invention, steps S3 and S4 are performed simultaneously to achieve simultaneous deodorization, ammonia control and sterilization, with a single cycle treatment time of 30 to 120 minutes.

[0013] As a preferred embodiment of the present invention, a hypochlorous acid and plasma synergistic deodorization and ammonia control epidemic prevention system for livestock and poultry breeding is provided, the system comprising a hypochlorous acid atomization unit, a low-temperature plasma purification unit, an intelligent control unit, and a zoned pipe spraying unit. The hypochlorous acid atomization unit includes a hypochlorous acid electrolysis preparation module, a drug solution voltage stabilization and storage module, an ultrasonic atomization module, and a concentration detection and control module. The hypochlorous acid electrolysis preparation module is used to prepare a slightly acidic hypochlorous acid solution with a concentration ≤200mg / L and a pH value of 5.0~6.5. The ultrasonic atomization module atomizes the slightly acidic hypochlorous acid solution into small molecule suspended particles of 0~10μm. The low-temperature plasma purification unit includes a low-temperature plasma generator, a high-voltage power supply module, and a wind-powered conveying module. The low-temperature plasma generator breaks down the air through high-voltage discharge to generate high-energy electrons, positive and negative ions, hydroxyl radicals, oxygen radicals, and ozone active particles. The intelligent control unit is electrically connected to the hypochlorous acid atomization unit, the low-temperature plasma purification unit and the environmental monitoring sensor respectively. It has a built-in multi-category livestock and poultry breeding adaptation program to collect ammonia concentration, temperature and humidity data of the breeding environment in real time, and adaptively adjust the hypochlorous acid concentration, atomization amount and plasma output power. The zoned piped spray unit adopts a dual-zone differentiated piped structure, corresponding to the two major odor sources: the livestock breeding area and the manure storage and treatment area, respectively, to achieve uniform coverage of the entire area by atomized particles and plasma purification airflow.

[0014] As a preferred embodiment of the present invention, the hypochlorous acid electrolysis preparation module is a diaphragm-free electrolysis device, which can stably prepare a slightly acidic hypochlorous acid solution. The solution has a stable storage period of ≥30 days at room temperature and there is no rapid concentration decay.

[0015] As a preferred embodiment of the present invention, the atomization frequency of the ultrasonic atomization module is 1.7 to 2.4 MHz, and the atomized particles are mainly concentrated in the range of 1 to 5 μm in diameter, which can remain suspended in the air of the breeding space for a long time and fully react with odor molecules.

[0016] In a preferred embodiment of the present invention, the discharge voltage of the low-temperature plasma generator is 5–15 kV, the discharge frequency is 10–50 kHz, and the output active particle concentration is ≥10. 6 pcs / cm3 .

[0017] As a preferred embodiment of the present invention, the intelligent control unit has five built-in breeding adaptation modes for pigs, dairy cows, beef cattle, laying hens, and broilers. It can automatically match the equipment operating parameters according to the breeding category, breeding scale, and real-time pollution concentration, and supports one-click scene switching and fully automatic closed-loop operation.

[0018] The method provided by this invention is applicable to ammonia emission reduction, odor control, and pens disease prevention in pig farms, dairy farms, beef cattle farms, layer chicken farms, and broiler farms with an annual output of 500 or more pigs.

[0019] In summary, the beneficial technical effects of the present invention are as follows: 1. Employing a dual-coupling technology of hypochlorous acid chemical oxidation and plasma high-energy degradation, it thoroughly decomposes odor molecules such as ammonia, hydrogen sulfide, and VOCs, rather than using traditional adsorption and masking methods. This eliminates odors at the source, with no secondary pollution or odor rebound. The ammonia removal rate and odor removal rate are far higher than traditional technologies. Moreover, the final reaction products are nitrogen, carbon dioxide, water, and trace amounts of harmless salts, with no chemical residues or secondary pollutants. This fully complies with the requirements of the green and sustainable development policy for animal husbandry and can reliably meet the latest environmental accounting standards of HJ1434-2025.

[0020] 2. It adopts a low-concentration, slightly acidic hypochlorous acid system, which is homologous to the animal's own immune substances. It is non-irritating and non-toxic to the animal's skin and mucous membranes. The plasma operates at low temperature, so there is no high-temperature burn or excessive ozone residue. There is no need to empty the pens or suspend breeding, so it does not affect normal breeding production and significantly reduces the cost of breeding management.

[0021] 3. Overcoming the limitations of traditional technologies with limited functionality, this technology not only degrades pollutants in exhaust gases but also broadly kills harmful microorganisms such as E. coli, Salmonella, and influenza viruses in livestock pens, effectively reducing the incidence of livestock and poultry diseases and achieving the dual value of environmental management and disease prevention in livestock farming.

[0022] 4. Built-in operating modes for multiple product categories such as pigs, dairy cows, laying hens, and broilers, which can adapt to different breeding scales and different pollution concentrations. The equipment is stable in operation, simple in operation and maintenance, and has low consumable costs, making it suitable for the routine environmental management needs of large-scale farms. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a method for deodorizing and controlling ammonia in livestock and poultry farming using a combination of slightly acidic hypochlorous acid atomization and low-temperature plasma in this embodiment. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1 The present invention provides a technical solution: a method for deodorizing and controlling ammonia in livestock and poultry farming through the synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma, comprising the following steps: S1. Zoned control of pollution sources: Through zoned pipe spraying units, atomization outlets are arranged at a height of 1.2 to 1.8m above the ground in the livestock breeding area, and purification points are arranged at a height of 0.5 to 1.0m above the manure surface in the manure and sewage stacking and treatment area to achieve precise coverage of the core odor source. S2. Graded Precision Liquid Preparation and Atomization: The intelligent control unit adjusts the hypochlorous acid concentration according to the real-time ammonia concentration. When the ammonia concentration is <50ppm, 50-100mg / L hypochlorous acid is prepared; when the ammonia concentration is 50ppm≤100ppm≤100ppm, 100-150mg / L hypochlorous acid is prepared; and when the ammonia concentration is >100ppm, 150-200mg / L hypochlorous acid is prepared. The hypochlorous acid is then atomized by ultrasonic waves to form 0-10μm small molecular particles that diffuse into the aquaculture space. S3. Hypochlorous acid directional oxidation treatment: Atomized slightly acidic hypochlorous acid undergoes a multi-stage directional oxidation and decomposition reaction with ammonia in the air, completely degrading ammonia into harmless nitrogen, water and trace salts; S4. Plasma Synergistic Deep Purification: The low-temperature plasma purification unit generates active particles that break the chemical bonds of malodorous molecules such as hydrogen sulfide and VOCs through high-energy electron dissociation, free radical oxidation, and ionic reactions, thus completely decomposing them into harmless small molecules such as carbon dioxide, water, and nitrogen. S5. Synchronous animal sterilization and disease prevention: Utilizing the properties of hypochlorous acid to penetrate bacterial cell walls and oxidize microbial enzymes and genetic material, combined with the oxidative disinfection effect of plasma free radicals, it kills bacteria and viruses in the air and on the surface of objects in the pen. The entire process of animal sterilization is non-irritating and leaves no residue. S6 Intelligent closed-loop stable operation: Real-time monitoring of environmental indicators, dynamic fine-tuning of atomization volume and plasma power, maintaining the ammonia concentration in the enclosure below 20ppm.

[0027] Based on the livestock and poultry breeding hypochlorous acid and plasma synergistic deodorization, ammonia control and epidemic prevention system, the system includes a hypochlorous acid atomization unit, a low temperature plasma purification unit, an intelligent control unit and a zoned pipe spraying unit; The hypochlorous acid atomization unit includes a hypochlorous acid electrolysis preparation module, a drug solution voltage stabilization and storage module, an ultrasonic atomization module, and a concentration detection and control module. The hypochlorous acid electrolysis preparation module is used to prepare a slightly acidic hypochlorous acid solution with a concentration ≤200mg / L and a pH value of 5.0~6.5. The ultrasonic atomization module atomizes the slightly acidic hypochlorous acid solution into small molecule suspended particles of 0~10μm. The low-temperature plasma purification unit includes a low-temperature plasma generator, a high-voltage power supply module, and a wind-powered conveying module. The low-temperature plasma generator breaks down the air through high-voltage discharge to generate high-energy electrons, positive and negative ions, hydroxyl radicals, oxygen radicals, and ozone active particles. The intelligent control unit is electrically connected to the hypochlorous acid atomization unit, the low-temperature plasma purification unit, and the environmental monitoring sensor. It has built-in adaptation programs for various types of livestock and poultry farming, which are used to collect ammonia concentration, temperature, and humidity data of the farming environment in real time, and adaptively adjust the hypochlorous acid concentration, atomization amount, and plasma output power.

[0028] The hypochlorous acid atomization unit utilizes the BD-WH-LX20S hypochlorous acid atomizer, a technology disclosed by our company. This atomizer has a hypochlorous acid concentration control range of 20-200ppm, allowing for precise and stepless adjustment based on different farming scenarios and pollution concentrations. The atomized particle diameter ranges from 0-10 micrometers, with over 90% of particles having a diameter ≤5 micrometers, resulting in fine particles, uniform diffusion, and no treatment dead zones. A single unit can achieve a maximum atomization rate of 35L / h, adaptively adjusting the atomization rate based on real-time ammonia concentration. The number of units can be increased or decreased to adapt to different farming areas and conditions. In terms of treatment performance, the equipment achieves an ammonia removal rate ≥85% and an odor removal rate ≥90%. After treatment, the ammonia concentration in the pens remains stable at ≤20ppm, fully complying with national farming environmental standards. It also achieves a kill rate ≥99.9% against common pathogens in livestock and poultry farming, such as Escherichia coli and Staphylococcus aureus, with a sterilization response time ≤2 minutes, demonstrating highly efficient and rapid disinfection. The equipment operates at a noise level of ≤55dB, ensuring low-noise operation without disturbing the normal growth and habitat of livestock and poultry. The power consumption of a single unit at full speed is ≤1.5kW / h, resulting in low energy consumption and low maintenance costs. The equipment incorporates a pure water system, a circulation system, an intelligent liquid preparation system, a fine atomization system, and an electrolysis preparation system. It supports timed spraying, intelligent concentration adjustment, automatic fault alarms, and fully automatic start / stop functions. A single unit can be adapted to breeding spaces with a ceiling height of 5m or less and a floor area of ​​up to 200㎡, demonstrating its high adaptability.

[0029] The hypochlorous acid atomizer has overall dimensions of L1028mm × W590mm × H1920mm. Its small footprint eliminates the need for extensive site modifications, making it suitable for installation in limited spaces, such as those found in livestock farms. Within 1.5 meters of the installation area, a standard AC220V / 50HZ single-phase power supply interface and corresponding power protection device are required to ensure stable power supply. Within 2 meters of the equipment, an independent water supply interface is necessary to ensure a continuous water pressure ≥2.0Kg / cm³. 2 It is also equipped with dedicated drainage ditches or drainage interfaces to meet the needs of equipment water replacement, drainage, and maintenance. After the equipment is installed, professional technicians will conduct whole-machine debugging, parameter calibration, and scenario adaptation settings to ensure that all functions of the equipment are normal, operating parameters are accurate, and the preset deodorization, ammonia control, and epidemic prevention standards are met.

[0030] The low-temperature plasma purification unit adopts the bd-PA-501T4 plasma fresh air system, which is based on technology disclosed by our company. The plasma density of a single unit in this system can reach 1.6–4.47 × 10⁻⁶. 19 pcs / m 3 It features high concentration of active particles and strong purification capacity; the residual ozone concentration during equipment operation is <0.003 mg / m³. 3 The levels are far below national safety limits, posing no risk of ozone pollution; the rated fresh air volume is 1000 m³ / h. 3 It can quickly complete air replacement and purification in livestock pens at a speed of / h. The equipment operates at a noise level of ≤38dB, making it suitable for intensive livestock farming. Its full-speed power consumption is ≤300W / h, demonstrating significant energy-saving advantages. It boasts excellent sterilization and purification performance, achieving a 91.9% elimination rate for naturally occurring bacteria and a 99.99% kill rate for Staphylococcus aureus. Simultaneously, it meets the Class A standard (≥90%) for PM2.5 particulate matter filtration, simultaneously achieving multiple functions including exhaust gas purification, air sterilization, and particulate matter filtration. The standard suitable area is 200㎡ of livestock farming space.

[0031] To further verify the practical application effect, adaptability, and technical superiority of the present invention's method for deodorizing and controlling ammonia in livestock and poultry farming through the synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma, multiple targeted implementation examples were set up in conjunction with mainstream large-scale farming scenarios for pigs, laying hens, and dairy cows. Simultaneously, blank control examples and traditional single-treatment process control examples were set up. Comparative experiments were conducted under unified environmental conditions and testing standards to quantitatively evaluate the comprehensive performance of the present invention in terms of ammonia control and deodorization, sterilization and disease prevention, operational safety, and energy saving.

[0032] This experiment selected mainstream large-scale livestock and poultry farms in China, standardized the experimental environmental parameters, testing methods and equipment configuration, eliminated environmental interference, and ensured the authenticity and validity of the experimental data.

[0033] 1. Environmental conditions: The experimental pens were well-sealed with consistent natural ventilation. During the experiment, the ambient temperature ranged from 15 to 32°C and the humidity ranged from 60% to 85%, which is within the normal environmental range for livestock and poultry farming.

[0034] 2. Equipment configuration: This invention adopts a BD-WH-LX20S hypochlorous acid atomizer and a bd-PA-501T4 plasma fresh air system for coordinated operation, and strictly follows the S1-S6 process steps to implement zoned control, graded liquid preparation, coordinated purification, and intelligent closed-loop operation.

[0035] 3. Detection indicators: Continuously monitor ammonia concentration, hydrogen sulfide concentration, odor concentration, Escherichia coli and Staphylococcus aureus kill rate, equipment operating noise, and hourly energy consumption in the livestock pens. All data are the average value of 24 hours of continuous monitoring.

[0036] 4. Compliance standards: Based on the "Environmental Quality Standards for Livestock and Poultry Farms" (NY / T 388-2019), the qualified standards are: ammonia concentration in the pens ≤20ppm, no obvious odor, and pathogens meeting the standards.

[0037] Example 1: Application Trial in Large-Scale Pig Farms Experimental subjects: A large-scale fattening pig farm with an annual output of 800 pigs, a pen area of ​​180㎡, conventional stocking density, initial ammonia concentration of 115ppm and hydrogen sulfide concentration of 0.08mg / m³. 3 The breeding environment has a high number of pathogenic bacteria and a noticeable odor.

[0038] Implementation Process: The synergistic treatment process of this invention is adopted, with atomizing outlets arranged at a height of 1.5m in the breeding area and purification points set at a height of 0.8m in the manure storage area. Because the initial ammonia concentration is >100ppm, the intelligent system automatically prepares a 150-200mg / L slightly acidic hypochlorous acid solution, controlling the atomized particles to 0-5μm. Simultaneously, a low-temperature plasma fresh air system is activated, matching a 1000m... 3 / h fresh air volume, intelligent closed-loop system for real-time fine adjustment of atomization volume and plasma power, continuous and stable operation.

[0039] Operational Results: After 2 hours of continuous operation, the ammonia concentration in the pens decreased to 16.8 ppm, with an ammonia removal rate of 85.4%; hydrogen sulfide was completely degraded, with an odor removal rate of 92.1%; the kill rates for Escherichia coli and Staphylococcus aureus in the pens reached 99.92% and 99.95%, respectively, with a sterilization response time of 1.5 minutes; the equipment operating noise was 52 dB, the hourly energy consumption was 1.48 kW, and the residual ozone concentration in the plasma system was 0.0021 mg / m³. 3 It has no irritating odor, and the livestock and poultry are feeding and resting normally, with no stress response.

[0040] Example 2: Application Trial in Large-Scale Egg-Laying Hen Farms Test subjects: A laying hen farm with an annual stock of 12,000 hens, a closed chicken house with an area of ​​190 square meters, limited ventilation, high dust levels, initial ammonia concentration of 82 ppm, and hydrogen sulfide concentration of 0.06 mg / m³. 3 The concentration of airborne particulate matter and germs is significant, making it easy for bacterial counts to exceed standards.

[0041] Implementation process: Strictly follow the graded treatment process of this invention. The atomization outlet height in the breeding area is 1.3m, and the manure conveyor belt area is precisely controlled at 0.6m. The ammonia concentration is in the range of 50-100ppm. The intelligent liquid preparation system automatically prepares 100-150mg / L of slightly acidic hypochlorous acid, and ultrasonic atomization forms uniform small molecular particles. The plasma system operates at full load, simultaneously achieving multiple functions such as deodorization, ammonia control, dust removal, and sterilization. The system operates adaptively and with stable pressure.

[0042] Operational results: After 2 hours of continuous operation, the ammonia concentration in the chicken house dropped to 15.3 ppm, with an ammonia removal rate of 87.4%; the foul odor was completely eliminated, with a foul odor removal rate of 90.8%; the natural bacteria elimination rate in the air was 92.3%, the Staphylococcus aureus kill rate was 99.99%, and the PM2.5 filtration efficiency was 91.2%, reaching the Class A filtration standard; the equipment operating noise was 36 dB, which did not disturb the laying hens' egg production and roosting; the total hourly energy consumption was 1.75 kW; and there was no residue or secondary pollution throughout the entire process.

[0043] Example 3: Application Trial in Large-Scale Dairy Farms Experimental subjects: A large-scale dairy farm with 60 cows per year, with open breeding space and concentrated manure and sewage storage area. The initial ammonia concentration was 45 ppm, which is a low-concentration ammonia pollution scenario. The main treatment needs are long-term ammonia control, antibacterial and disease prevention, and improvement of breeding comfort.

[0044] Implementation process: The low-concentration adaptation mode of this invention is adopted, with ammonia concentration <50ppm. The intelligent system is configured with 50-100mg / L low-concentration slightly acidic hypochlorous acid to reduce drug consumption. The breeding area is misted at a height of 1.7m, and the manure area is fully covered for purification at 1.0m. The plasma system is operated at low power to maintain stable environmental indicators.

[0045] Operational results: After operation, the ammonia concentration in the pens stabilized at 12.6 ppm and remained stable for a long time without rebound; the pathogenic bacteria kill rate was 99.91%; the equipment operated with low noise and no stress on livestock and poultry; the hourly energy consumption was only 1.2 kW; the operation and maintenance costs were extremely low; and the breeding environment could be stably maintained for a long time.

[0046] Comparison Example 1: Blank Comparison Example In the natural ventilation mode, pig farm pens with the same specifications as in Example 1 were selected, with identical breeding scale, breeding density, and initial pollution indicators. No artificial purification equipment was used, and environmental indicators were monitored continuously for 24 hours, relying solely on the farm's conventional natural ventilation mode.

[0047] Test results: After natural ventilation, the ammonia concentration in the livestock pens only dropped to 78 ppm, far exceeding the national standard of 20 ppm; a noticeable malodor remained, and the hydrogen sulfide concentration was still 0.05 mg / m³. 3 The pathogens in the air showed no significant decrease, and the problem of excessive bacterial counts was prominent. It could not achieve the effect of sterilization and epidemic prevention, and the pollution concentration continued to rise under rainy and enclosed weather conditions, which completely failed to meet the requirements of environmental protection and aquaculture epidemic prevention.

[0048] Comparison with Example 2: Single-stage chloric acid atomization treatment mode Using the same hypochlorous acid atomization equipment and concentration ratio as in Example 1, the low-temperature plasma purification unit was turned off, and treatment was carried out solely by a single slightly acidic hypochlorous acid atomization. All other test conditions were completely consistent with those in Example 1.

[0049] Test results: After 2 hours of operation, the ammonia removal rate was 72.3%, and the final ammonia concentration was 31.8 ppm, which could not be consistently met. The ability to degrade complex odorous gases such as hydrogen sulfide and VOCs was weak, with an odor removal rate of only 68.5%. The pathogenic bacteria kill rate was 89.7%, which was incomplete and there were local treatment dead spots. The purification effect was singular, and there was no dust removal function, resulting in a significant decrease in the overall treatment effect.

[0050] Comparison with Example 3: Single low-temperature plasma treatment mode The same bd-PA-501T4 plasma fresh air system as in Example 1 was used, but the hypochlorous acid atomization unit was turned off. Treatment was carried out solely by low-temperature plasma technology, and the test environment and operating time were standardized.

[0051] Experimental results: Single plasma has a very poor effect on ammonia degradation, with an ammonia removal rate of only 45.2%, and the ammonia concentration is still as high as 63.2 ppm after operation; although it has a certain purification effect on hydrogen sulfide, VOCs and bacteria, with an odor removal rate of 75.3% and a pathogenic bacteria kill rate of 92.1%, the core ammonia control indicators are completely unqualified, and it cannot solve the core environmental pain points of the farm. Moreover, long-term high-power operation results in higher energy consumption.

[0052] Comparison with Example 4: Traditional chemical spraying treatment mode The treatment uses conventional alkaline deodorizing agents for livestock farms, applied manually by spraying. It is suitable for pig farms of similar size and is carried out according to conventional operation and maintenance methods and standardized testing procedures.

[0053] Test results: After spraying the agent, the ammonia concentration dropped to 25 ppm in the short term, but rebounded rapidly and exceeded the standard after 4 hours; the odor removal rate was 70.2%, indicating incomplete degradation; the chemical agent left irritating residues, causing mild stress and decreased feed intake in livestock and poultry; the agent consumables were costly, maintenance was cumbersome, and it was easy to cause secondary pollution of soil and air, with poor sterilization effect and inability to achieve long-term disease prevention.

[0054] The experimental data of the above embodiments and control examples are summarized in Table 1 below:

[0055] Table 1: Summary of Experimental Data Through quantitative comparison of multiple sets of embodiments and control examples, the synergistic treatment technology of slightly acidic hypochlorous acid atomization and low temperature plasma described in this invention can be fully verified. Compared with traditional aquaculture environment treatment technology, it has the core advantages of integrated and efficient treatment, safety and no harm, intelligent energy saving, wide adaptability and long-term stability.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma, characterized in that, Includes the following steps: S1. Zoned control of pollution sources: Through zoned pipe spraying units, atomization outlets are arranged at a height of 1.2 to 1.8m above the ground in the livestock breeding area, and purification points are arranged at a height of 0.5 to 1.0m above the manure surface in the manure and sewage stacking and treatment area to achieve precise coverage of the core odor source. S2. Graded Precision Liquid Preparation and Atomization: The intelligent control unit adjusts the hypochlorous acid concentration according to the real-time ammonia concentration. When the ammonia concentration is <50ppm, 50-100mg / L hypochlorous acid is prepared; when the ammonia concentration is 50ppm≤100ppm≤100ppm, 100-150mg / L hypochlorous acid is prepared; and when the ammonia concentration is >100ppm, 150-200mg / L hypochlorous acid is prepared. The hypochlorous acid is then atomized by ultrasonic waves to form 0-10μm small molecular particles that diffuse into the aquaculture space. S3. Hypochlorous acid directional oxidation treatment: Atomized slightly acidic hypochlorous acid undergoes a multi-stage directional oxidation and decomposition reaction with ammonia in the air, completely degrading ammonia into harmless nitrogen, water and trace salts; S4. Plasma Synergistic Deep Purification: The low-temperature plasma purification unit generates active particles that break the chemical bonds of malodorous molecules such as hydrogen sulfide and VOCs through high-energy electron dissociation, free radical oxidation, and ionic reactions, thus completely decomposing them into harmless small molecules such as carbon dioxide, water, and nitrogen. S5. Synchronous animal sterilization and disease prevention: Utilizing the properties of hypochlorous acid to penetrate bacterial cell walls and oxidize microbial enzymes and genetic material, combined with the oxidative disinfection effect of plasma free radicals, it kills bacteria and viruses in the air and on the surface of objects in the pen. The entire process of animal sterilization is non-irritating and leaves no residue. S6 Intelligent closed-loop stable operation: Used to monitor environmental indicators in real time, dynamically fine-tune the atomization amount and plasma power, and maintain the ammonia concentration in the enclosure at a stable level of less than 20ppm for a long time.

2. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 1, characterized in that... In step S4, the mixing ratio of hypochlorous acid atomized particles to plasma active particles is 1:3 to 1:

5.

3. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 1, characterized in that... In step S5, during normal operation of the livestock, the concentration of hypochlorous acid is controlled to be ≤150mg / L, and the plasma output power is reduced by 20% to 30% simultaneously.

4. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 1, characterized in that... Steps S3 and S4 are performed simultaneously to achieve deodorization, ammonia control, and sterilization at the same time, with a single cycle treatment time of 30 to 120 minutes.

5. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 1, characterized in that... Based on the livestock and poultry breeding hypochlorous acid and plasma synergistic deodorization, ammonia control and epidemic prevention system, the system includes a hypochlorous acid atomization unit, a low temperature plasma purification unit, an intelligent control unit, and a zoned pipe spraying unit; The hypochlorous acid atomization unit includes a hypochlorous acid electrolysis preparation module, a drug solution voltage stabilization and storage module, an ultrasonic atomization module, and a concentration detection and control module. The hypochlorous acid electrolysis preparation module is used to prepare a slightly acidic hypochlorous acid solution with a concentration ≤200mg / L and a pH value of 5.0~6.

5. The ultrasonic atomization module atomizes the slightly acidic hypochlorous acid solution into small molecule suspended particles of 0~10μm. The low-temperature plasma purification unit includes a low-temperature plasma generator, a high-voltage power supply module, and a wind-powered conveying module. The low-temperature plasma generator breaks down the air through high-voltage discharge to generate high-energy electrons, positive and negative ions, hydroxyl radicals, oxygen radicals, and ozone active particles. The intelligent control unit is electrically connected to the hypochlorous acid atomization unit, the low-temperature plasma purification unit and the environmental monitoring sensor respectively. It has a built-in multi-category livestock and poultry breeding adaptation program to collect ammonia concentration, temperature and humidity data of the breeding environment in real time, and adaptively adjust the hypochlorous acid concentration, atomization amount and plasma output power. The zoned piped spray unit adopts a dual-zone differentiated piped structure, corresponding to the two major odor sources: the livestock breeding area and the manure storage and treatment area, respectively, to achieve uniform coverage of the entire area by atomized particles and plasma purification airflow.

6. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 5, is characterized in that... The hypochlorous acid electrolysis preparation module is a diaphragm-free electrolysis device that can stably prepare a slightly acidic hypochlorous acid solution. The solution has a stable storage period of ≥30 days at room temperature and there is no rapid concentration decay.

7. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 5, characterized in that... The ultrasonic atomization module has an atomization frequency of 1.7 to 2.4 MHz, and the atomized particles are mainly concentrated in the range of 1 to 5 μm in size. They can remain suspended in the air of the breeding space for a long time and fully react with odor molecules.

8. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 5, characterized in that, The low-temperature plasma generator has a discharge voltage of 5–15 kV, a discharge frequency of 10–50 kHz, and an output active particle concentration ≥10. 6 pcs / cm 3 .

9. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 5, characterized in that, The intelligent control unit has five built-in breeding adaptation modes for pigs, dairy cows, beef cattle, laying hens, and broilers. It can automatically match the equipment operating parameters according to the breeding type, breeding scale, and real-time pollution concentration, and supports one-click scene switching and fully automatic closed-loop operation.

10. The method for deodorizing and controlling ammonia in livestock and poultry farming using a synergistic effect of slightly acidic hypochlorous acid atomization and low-temperature plasma as described in claim 1, characterized in that, It is suitable for ammonia emission reduction, odor control and pens disease prevention in pig farms, dairy farms, beef cattle farms, layer chicken farms and broiler farms with an annual output of 500 heads or more.

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