A system for removing ammonia and hydrogen sulfide from water and sewage containing water bubbles

Abstract

The application discloses a system for removing ammonia and hydrogen sulfide in water-bubble manure sewage and relates to the technical field of deodorization treatment of pig farm sewage. The system for removing ammonia and hydrogen sulfide in water-bubble manure sewage comprises an air-water ratio self-absorption system built above a sewage storage pool, a photosynthesis self-produced oxygen system built in the air-water ratio self-absorption system and a double-face binary deodorization system. The application develops a system for removing ammonia and hydrogen sulfide in water-bubble manure sewage. The system is based on the characteristics of sewage and the emission rule of odor, combines a coating type photocatalyst and a negative oxygen ion deodorization technology, integrates the photosynthesis oxygen production capacity of chlorella, considers the factors of illumination and non-illumination, systematically studies the action relationship between various factors, so that the system can quickly remove the ammonia and hydrogen sulfide and increase the deodorization efficiency. In addition, the framework structure of the system has low cost, is easy to carry and can be reused.

Description

Technical Field

[0001] This invention relates to the field of pig farm wastewater deodorization treatment technology, specifically to a system for removing ammonia and hydrogen sulfide from water-soaked manure wastewater. Background Technology

[0002] Watery wastewater is a typical type of organic wastewater, commonly found in pig farms in northern China and in pig houses in the south with the necessary facilities. This type of wastewater contains large amounts of organic matter, such as fats, proteins, and carbohydrates, as well as various microorganisms, including odor-causing bacteria and putrefactive bacteria. Due to its unique composition and properties, watery wastewater often produces unpleasant odors during treatment and discharge. The main sources of the odor are ammonia and hydrogen sulfide. These odors severely affect the hygiene and quality of life of the surrounding environment and may even trigger public dissatisfaction and protests.

[0003] With the acceleration of urbanization and changes in agricultural production methods, the generation and discharge of sewage from wastewater are on the rise, putting increasing pressure on the environment. Therefore, conducting research on deodorization of sewage from wastewater can not only help improve the air quality of the surrounding environment and reduce the impact of odor on nearby residents, but also protect water bodies, soil, and other ecosystems, promoting the sustainable development of the ecological environment.

[0004] Currently, deodorization methods for livestock and poultry farms include chemical, physical, and biological methods. Chemical methods can cause secondary pollution, physical methods have a saturation point, and both are relatively expensive, although they are fast in removing odors. Biological methods, while low-cost, may have lower deodorization efficiency.

[0005] Therefore, the inventors believe that how to creatively construct a system for removing ammonia and hydrogen sulfide from sewage in a septic tank, a system that can quickly deodorize, reduce system operating costs, and whose deodorization device is easy to assemble and transport, are the technical problems that urgently need to be solved by those skilled in the art.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] To address the aforementioned technical problems, embodiments of the present invention provide a system for removing ammonia and hydrogen sulfide from septic wastewater, thereby solving the problems mentioned in the background section.

[0008] The present invention provides the following technical solution: a system for removing ammonia and hydrogen sulfide from septic wastewater, comprising: an air-to-water ratio self-absorption system built above a wastewater storage tank, and a photosynthetic self-generating oxygen system and a dual-sided binary deodorization system built within the air-to-water ratio self-absorption system.

[0009] Specifically, sewage storage tanks are mainly used to store sewage from feces. In actual use, sewage storage tanks are mostly made of cement.

[0010] Preferably, the air-to-water ratio self-absorption system includes: a first cuboid frame erected above the storage tank, and a white transparent film covering the surface of the first cuboid frame;

[0011] Among them, the height of the first cuboid frame must ensure that the ratio of the air volume above the bubbling sewage in the storage tank to the volume of the bubbling sewage is greater than 0.85; and the ratio of the diagonal length of the storage tank to the depth of the bubbling sewage is greater than 0.65.

[0012] The study found that the above-mentioned ratio design allows hydrogen sulfide released from the surface of sewage in the closed system of the air-water self-absorption system to be oxidized by oxygen in the air above the sewage and ammonia to be absorbed by water molecules, which can maintain the effect of rapidly removing hydrogen sulfide and ammonia from the surface of sewage for up to 6 hours.

[0013] When the ratio is 0.85 and the cement tank capacity is fully utilized, the high sewage level allows for the absorption and dissolution of ammonia and hydrogen sulfide at the bottom. This, combined with the removal of ammonia and hydrogen sulfide in the space, achieves self-absorption and rapid removal.

[0014] However, when there is too much organic matter in the sewage and it needs to be stored for more than 6 hours, the oxygen in the space above is consumed and the partial pressure of ammonia on the surface of the sewage is high, which exceeds the capacity of the air-water ratio self-absorption system. Therefore, an oxygen production system and a deodorization system are required to achieve long-term deodorization.

[0015] Preferably, the first cuboid frame is made of retractable stainless steel tubing, which facilitates folding, transportation, and maintenance.

[0016] Preferably, the photosynthetic self-generating oxygen system includes: a photobioreactor built on the air-water ratio self-absorption system, and a water-filled sewage and several small algae floating in the water-filled sewage in the photobioreactor;

[0017] The photobioreactor includes a second cuboid frame and a white transparent film covering the surface of the second cuboid frame. The photobioreactor is connected to the storage tank via a pipe and a first submersible pump. The first submersible pump draws sewage from the storage tank and replenishes it to the photobioreactor. A circulation pump is installed at the edge of the storage tank, and the circulation pump drives the circulation of the water-filled sewage in the photobioreactor through a pipe.

[0018] Preferably, the second cuboid frame is made of stainless steel pipes, with a frame depth of 30cm and a length slightly longer than the width of the cement pool for easy construction; the water level inside is 20cm, and the width is greater than or equal to one-fifth of the long side of the cement pool; the entire frame is placed on 3-5 support strips embedded in the side of the cement pool.

[0019] Preferably, the circulation pump drives the bubbling sewage in the photobioreactor at a flow rate of 2-3 m / s, and ensures that the circulation pump is started once every 3 hours, with each circulation lasting 0.5 hours, and the circulation only occurs during the daytime;

[0020] During the cultivation of Chlorella, the ammonia nitrogen concentration in the wastewater in the photobioreactor should be less than 50 mg / L. If the ammonia nitrogen concentration exceeds 50 mg / L, dilution is required. The ratio of day to night cycles should be 14:10. This light-dark ratio ensures a Chlorella production efficiency greater than 0.208 g / h·m. 3 .

[0021] The CO2 produced by Chlorella comes from the respiration of microorganisms in the sewage in the cement pool. When the COD of the sewage is greater than 200 mg / L, it provides a carbon source for algae growth and releases oxygen into the space above through photosynthesis. This oxygen is combined with the dual-sided binary deodorization system to accelerate the removal of ammonia and hydrogen sulfide.

[0022] Preferably, the water level in the cement tank should be about 3 cm higher than the bottom of the photobioreactor, relying on the buoyancy of the wastewater and the support bars to support the entire reactor. If the deodorization time is long, one-tenth of the culture medium needs to be extracted from the photobioreactor daily for soil irrigation, while a corresponding volume of wastewater needs to be added to the photobioreactor to achieve continuous cultivation and continuous oxygen production for deodorization. The photobioreactor, cement tank wastewater, Chlorella, and circulation pump constitute a photosynthetic self-oxygenation system.

[0023] Preferably, the dual-sided binary deodorization system includes a dual-sided binary deodorization curtain suspended in the air-to-water ratio self-absorption system;

[0024] The length and height of the double-sided binary deodorizing curtain are the same as those of the air-to-water ratio self-absorption system; the double-sided binary deodorizing curtain is a transparent plastic film; the upper half of both sides of the film is coated with a negative oxygen ion coating, and the lower half of both sides of the film is coated with a quantum photocatalyst coating.

[0025] Preferably, the negative ion coating contains tourmaline powder and rare earth powder, with a spraying amount of >0.23L per square meter; the negative ion release of the negative ion coating is >2000 ions / cm³. 3 The coating amount of the quantum photocatalyst is >0.015L per square meter; the negative ion release of the quantum photocatalyst coating is >1500 ions / cm³. 3 .

[0026] Preferably, the double-sided binary deodorizing curtain is suspended on the wide side of the air-to-water ratio self-absorption system and parallel to the long side of the air-to-water ratio self-absorption system; the distance between the double-sided binary deodorizing curtain and the long side of the air-to-water ratio self-absorption system is half the height H of the air-to-water ratio self-absorption system.

[0027] When the width of the storage tank is greater than the height H of the air-to-water ratio self-absorption system, the width of the air-to-water ratio self-absorption system is greater than the height H. In this case, it is necessary to add another double-sided binary deodorizing curtain at a distance H from the first double-sided binary deodorizing curtain, and at the same time, add a horizontally set single-sided unit deodorizing curtain on top of the two double-sided binary deodorizing curtains.

[0028] Preferably, the single-sided unit deodorizing curtain is 10cm away from the top of the air-to-water ratio self-absorption system; its length is two-thirds of the long side of the air-to-water ratio self-absorption system.

[0029] The upper surface of the single-sided deodorizing curtain is coated with quantum photocatalyst, and the lower surface is coated with a negative ion coating; the amount of quantum photocatalyst applied is >0.015L per square meter, and the negative ion release is >1500 ions / cm². 3 The negative ion coating contains tourmaline powder and rare earth powder, with a spraying volume of >0.23L per square meter and a negative ion release of >2000 ions / cm³. 3 .

[0030] In the dual-sided binary deodorization system, the negative ion coating combines with water molecules to form negative oxygen ions and hydrogen ions, which are released continuously. Under light conditions, the quantum photocatalyst combines with water molecules and oxygen to release superoxide radicals and hydrogen peroxide radicals. Under light conditions, the formation of oxygen and water vapor by Chlorella photosynthesis enhances the deodorization effect. When there is no light, the negative ion coating combines with water molecules to form negative oxygen ions to remove odors. The combination of these achieves 24-hour continuous deodorization and light-enhanced deodorization effect.

[0031] Preferably, the minimum distance between the water level in the storage tank and the ground is 17cm. A second submersible pump is installed below the storage tank near the wall. Its head is 20cm higher than the depth of the sewage. The inlet of the second submersible pump is located at the bottom, and the outlet is located 20cm away from the opposite wall. The opening is 10cm above the water surface and perpendicular to the opposite wall. A shower-type nozzle is installed at the opening end to spray directly onto the opposite wall. The impact generates water droplets, increasing the contact area of ​​the gas.

[0032] Preferably, when the width of the tank is greater than 5 meters, a second submersible pump is installed every 5 meters along the width of the storage tank to achieve overall agitation of the sewage tank. The agitation flow rate is 6 hours to complete one overall agitation.

[0033] The present invention provides a system for removing ammonia and hydrogen sulfide from bubbling sewage, which has the following beneficial effects: The present invention develops a system for removing ammonia and hydrogen sulfide from bubbling sewage. This system is based on the characteristics of sewage and the dissolution and emission law of odor, combines coating-type photocatalysis and negative oxygen ion deodorization technology, integrates the photosynthetic oxygen production capacity of Chlorella, considers the factors of light and non-light, and systematically studies the interaction relationship between various factors, so as to achieve both rapid removal and increased deodorization efficiency. In addition, the framework structure of this system is low in cost, easy to transport and reusable. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the ammonia and hydrogen sulfide removal system for water-filled sewage of the present invention;

[0035] Figure 2 This is a schematic diagram of the first cuboid frame structure of the hollow water ratio self-absorption system of the present invention;

[0036] Figure 3 This is a schematic diagram of the hollow water ratio self-absorption system of the present invention;

[0037] Figure 4 For the present invention Figure 3 Structural diagrams of each component;

[0038] Figure 5 This is a schematic diagram of the structure of the wastewater storage tank with photobioreactor in this invention. Detailed Implementation

[0039] 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.

[0040] To address the problems mentioned in the background section, this invention provides a system for removing ammonia and hydrogen sulfide from septic wastewater, thereby solving the aforementioned technical problems. The technical solution is as follows:

[0041] I. The conceptual principle of the present invention, a system for removing ammonia and hydrogen sulfide from septic wastewater, is as follows:

[0042] This invention aims to propose an in-situ, all-weather, closed-loop deodorization system for removing ammonia and hydrogen sulfide from septic tank wastewater. It can be used for deodorizing wastewater stored for long periods and for wastewater that cannot be discharged in the short term. The method is simple in construction, provides continuous 24-hour deodorization, and enhances the deodorization effect under light conditions, rapidly removing odors escaping from wastewater. Equipped with a submersible pump, it can achieve the goal of removing all ammonia and hydrogen sulfide from the water. Specific features are as follows:

[0043] (1) The air-water ratio self-absorption system, that is, the sewage volume and air space in the deodorization system have a certain ratio to form a closed system. The ammonia and hydrogen sulfide released by the sewage can be oxidized and dissolved in a certain space. At the same time, the ammonia and hydrogen sulfide at the bottom of the sewage can also be self-dissolved due to their own water volume and height. Therefore, the appropriate ratio between the sewage volume and the air space volume can remove ammonia and hydrogen sulfide in a short time and dissolve the ammonia and hydrogen sulfide released at the bottom in a long time. However, when the ammonia and hydrogen sulfide released by the sewage exceed the carrying capacity of the space, it is necessary to establish a photosynthetic self-generated oxygen system and a two-sided binary deodorization system.

[0044] (2) Photosynthetic oxygen production system: using sewage as water source and nitrogen and trace element nutrient source, CO2 released during sewage storage as carbon source, and sewage surface as bearing capacity, a thin film Chlorella culture system is established. Under the intermittent circulation action of external circulation pump, CO2 absorption and oxygen release are achieved through photosynthesis in a closed system. The released oxygen is used for deodorization and respiration of microorganisms in sewage. The generated Chlorella culture liquid is used as fertilizer for agricultural planting after primary treatment. Long-term oxygen release is achieved by continuously adding sewage until deodorization ends.

[0045] (3) A double-sided binary deodorization system, consisting of a double-sided binary deodorization curtain and a single-sided unit deodorization curtain. A transparent plastic film curtain is suspended from the top along the long side of the closed system. The upper half of the curtain is coated with a negative oxygen ion coating, and the lower half is coated with a quantum photocatalyst. Both sides are coated at corresponding positions. The suspension position is determined according to the height of the closed system. The number of double-sided binary deodorization curtains is determined by the width of the closed system. When the width is large, a single-sided unit deodorization curtain is arranged parallel to the top surface at a distance of 10cm from the top between two double-sided binary deodorization curtains. That is, the side of the curtain exposed to light is coated with a quantum photocatalyst, and the other side is coated with a negative oxygen ion coating. Multiple double-sided binary deodorization curtains and single-sided unit deodorization curtains constitute a double-sided binary deodorization system. The negative ion coating can electrolyze water molecules produced by sewage evaporation, generating hydrogen ions and hydroxyl ions. Hydrogen ions combine with ammonia gas, and hydroxyl ions combine with water molecules to form negative ions, which can react with acidic hydrogen sulfide gas and are independent of light, achieving a 24-hour deodorization effect. Quantum photocatalyst requires sunlight exposure, and combines with oxygen released by Chlorella to form free radicals, thereby enhancing the deodorization effect.

[0046] (4) Meanwhile, the frame of the air-water ratio self-absorption system is made of shrinkable stainless steel pipes, which can shrink in both horizontal and vertical directions and are covered with a film; the double-sided binary deodorization system is composed of transparent film curtains and has shrinkability; the width and length of the photobioreactor in the photosynthetic self-oxygen production system do not have shrinkability; therefore, the volume of the whole deodorization system after shrinkage is the volume of the photobioreactor, which can realize the overall transportation and repeated use; for larger photobioreactors, it is necessary to adopt the splicing method to construct, which is also convenient for disassembly and transportation.

[0047] II. Specific Implementation Cases:

[0048] Taking a cement pool that is 10 meters long, 5 meters wide, and 2 meters deep as an example, the highest water level in the cement pool is 1.73 meters, the COD of the wastewater is 300 mg / L, the ammonia nitrogen is 500 mg / L, and the ammonia content is 130 mg / m³. 3 Hydrogen sulfide content 80 mg / m³ 3 .

[0049] An integrated deodorization system was constructed above the cement pool. The air-to-water ratio self-absorption system is 10.5 meters long (L), 5.5 meters wide (W), and 1.5 meters high (H), with a total volume of 102 [10.5 × 5.5 × (1.5 + 0.27)] cubic meters. The wastewater volume is 86.5 cubic meters, with an air-to-water ratio of 1.18, greater than 0.85. Furthermore, the ratio of the diagonal to the wastewater height is 6.57, greater than 0.65, meeting the air-to-water ratio requirements. The frame is composed of stainless steel contraction tubes, and the frame is covered with a transparent film. Within 6 hours, the ammonia content drops to 1.1-4.3 mg / m³. 3 The hydrogen sulfide content decreased to 0.6-6.1 mg / m³. 3 The system can maintain deodorization within the closed system for up to 6 hours; after 6 hours, the ammonia content reaches 74 mg / m³. 3 Hydrogen sulfide rose to 79 mg / m³ 3 It is necessary to establish a photosynthetic oxygen production system and a dual-sided binary deodorization system to eliminate odors.

[0050] The photobioreactor in the photosynthetic oxygen production system is constructed of stainless steel tubing and consists of two subtype photobioreactors joined together and fixed to the edge of a cement tank. The entire photobioreactor is 5 meters long, 2 meters wide, and 0.3 meters deep. The Chlorella culture medium is at a level of 0.2 meters, lined with a plastic film, and its bottom is in contact with the wastewater in the cement tank. A total of 2 cubic meters of water is contained, including 0.2 cubic meters of wastewater and 1.8 cubic meters of tap water. Chlorella is inoculated, achieving an algal production efficiency greater than 0.208 g / h·m³. 3 The circulating pump can be powered by electricity or solar energy. Driven by an external circulating pump, the flow rate is 2-3 meters per second. The circulating pump is started once every 3 hours, and each cycle lasts for 0.5 hours. The circulation takes place during the day.

[0051] The double-sided binary deodorizing system uses a 10-meter-long, 1.5-meter-high double-sided binary deodorizing curtain 1, suspended 0.75 meters from the wide side of the self-absorption system's long side. Another double-sided binary deodorizing curtain 2 is suspended 1.5 meters away from curtain 1. Since the curtain 2 is 5 meters wide, a total of three double-sided binary deodorizing curtains and two single-sided unit deodorizing curtains are needed. Each single-sided unit deodorizing curtain is 10cm from the top surface, 7 meters long, and 1.5 meters wide. Under the combined action of negative oxygen ions and quantum photocatalysis, and through the photosynthesis of Chlorella, the emitted odorous gases can be removed by negative oxygen ions and free radicals. Especially under light conditions, within 1 hour, the ammonia and hydrogen sulfide concentrations drop to 2.16 and 0.24 mg / m³, respectively. 3 It removes odorous gases more quickly.

[0052] For long-term removal of odorous gases from wastewater, a submersible pump is needed to complete one overall circulation of the wastewater within 6 hours, achieving the removal effect within 24 hours, with ammonia and hydrogen sulfide content at 0.11 and 0.18 mg / m³, respectively. 3 After the removal process is completed, the entire system will be recycled to the size of a photobioreactor, which is composed of two sub-type photobioreactors, each 2.5 meters long and 1 meter wide, making it easy to transport and reuse.

[0053] Based on the above system, when the COD of the cement tank wastewater is 1000 mg / L, the ammonia content is 288 mg / m³. 3 Hydrogen sulfide content 152 mg / m³ 3 It takes 48 hours, and the ammonia and hydrogen sulfide contents are 2.31 and 0.24 mg / m³, respectively. 3 When the COD of the wastewater from the cement tank was 2000 mg / L, the ammonia content was 546 mg / m³. 3 Hydrogen sulfide content 189 mg / m³ 3 It requires 72 hours to remove, and the ammonia and hydrogen sulfide contents are 9.88 and 8.89 mg / m³, respectively. 3 .

[0054] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A system for removing ammonia and hydrogen sulfide from septic wastewater, characterized in that, include: An air-to-water ratio self-absorption system built above a sewage storage tank, and a photosynthetic self-generated oxygen system and a dual-sided binary deodorization system built within the air-to-water ratio self-absorption system; The air-to-water ratio self-absorption system includes: a first cuboid frame built above the storage tank, and a white transparent film covering the surface of the first cuboid frame; Among them, the height of the first cuboid frame must ensure that the ratio of the air volume above the bubbling sewage in the storage tank to the volume of the bubbling sewage is greater than 0.85; and the ratio of the diagonal length of the storage tank to the depth of the bubbling sewage is greater than 0.

65. The photosynthetic oxygen production system includes: a photobioreactor built on the air-water ratio self-absorption system, as well as water-filled sewage and several small algae floating in the water-filled sewage; The photobioreactor includes a second cuboid frame and a white transparent film covering the surface of the second cuboid frame; the photobioreactor is connected to the storage tank via a pipe and a first submersible pump, the first submersible pump draws sewage from the storage tank and replenishes it to the photobioreactor; a circulation pump is installed on the edge of the storage tank, and the circulation pump drives the circulation of the water-filled sewage in the photobioreactor through a pipe. The dual-sided binary deodorization system includes a dual-sided binary deodorization curtain suspended in the air-to-water ratio self-absorption system; The length and height of the double-sided binary deodorizing curtain are the same as those of the air-to-water ratio self-absorption system; the double-sided binary deodorizing curtain is a transparent plastic film; the upper half of both sides of the film is coated with a negative oxygen ion coating, and the lower half of both sides of the film is coated with a quantum photocatalyst coating.

2. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 1, characterized in that, The circulation pump drives the bubbling sewage in the photobioreactor at a flow rate of 2-3 m / s, and ensures that the circulation pump is started once every 3 hours, with each circulation lasting 0.5 hours, and circulation only occurs during the daytime. During the cultivation of Chlorella, the ammonia nitrogen concentration in the wastewater in the photobioreactor should be less than 50 mg / L. If the ammonia nitrogen concentration is higher than 50 mg / L, the ammonia nitrogen concentration needs to be diluted. The ratio of day to night cycles is 14:

10. This light-dark ratio can ensure that the production efficiency of Chlorella is greater than 0.208 g / h·m³.

3. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 1, characterized in that, The negative ion coating contains tourmaline powder and rare earth powder, with a spraying volume of >0.23L per square meter; the negative ion release of the coating is >2000 ions / cm³. 3 The coating amount of the quantum photocatalyst is >0.015L per square meter; the negative ion release of the quantum photocatalyst coating is >1500 ions / cm³. 3 .

4. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 1, characterized in that, The double-sided binary deodorizing curtain is hung on the wide side of the air-to-water ratio self-absorption system and parallel to the long side of the air-to-water ratio self-absorption system. The distance between the double-sided binary deodorizing curtain and the long side of the air-to-water ratio self-absorption system is half the height H of the air-to-water ratio self-absorption system; When the width of the storage tank is greater than the height H of the air-to-water ratio self-absorption system, the width of the air-to-water ratio self-absorption system is greater than the height H. In this case, it is necessary to add another double-sided binary deodorizing curtain at a distance H from the first double-sided binary deodorizing curtain, and at the same time, add a horizontally set single-sided unit deodorizing curtain on top of the two double-sided binary deodorizing curtains.

5. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 4, characterized in that, The single-sided unit deodorizing curtain is 10cm away from the top of the air-to-water ratio self-absorption system; its length is two-thirds of the long side of the air-to-water ratio self-absorption system. The upper surface of the single-sided deodorizing curtain is coated with quantum photocatalyst, and the lower surface is coated with a negative ion coating; the amount of quantum photocatalyst applied is >0.015L per square meter, and the negative ion release is >1500 ions / cm². 3 The negative ion coating contains tourmaline powder and rare earth powder, with a spraying volume of >0.23L per square meter and a negative ion release of >2000 ions / cm³. 3 .

6. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 1, characterized in that, The minimum distance between the water level in the storage tank and the ground is 17cm. A second submersible pump is installed below the storage tank near the wall. Its head is 20cm higher than the depth of the sewage. The inlet of the second submersible pump is located at the bottom, and the outlet is located 20cm away from the opposite wall. The opening is 10cm above the water surface and perpendicular to the opposite wall. A shower-type nozzle is installed at the opening end, which sprays directly onto the opposite wall. The impact generates water droplets, increasing the contact area of ​​the gas.

7. The system for removing ammonia and hydrogen sulfide from wastewater in a septic tank according to claim 6, characterized in that, When the width of the tank is greater than 5 meters, a second submersible pump is installed every 5 meters along the width of the storage tank to achieve overall agitation of the sewage tank. The agitation flow rate is 6 hours to complete one overall agitation.

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