Integrated nitrification and denitrification aquatic organism biochemical purification system

Abstract

The present application relates to a kind of nitration denitrification integrated aquatic biochemical purification system, the aquatic biochemical purification system includes tank and the water inlet pipe and water outlet pipe respectively communicating tank interior and outside, water inlet pipe and water outlet pipe are connected with tank, the water inlet pipe and water inlet cavity are connected, the water outlet pipe and water outlet cavity are connected, the water inlet cavity, at least one nitrification cavity, at least one denitrification cavity and water outlet cavity are arranged in the tank, and the nitrification cavity is also connected with water outlet cavity, the water inlet cavity is connected with water inlet pipe, and the water outlet cavity is connected with water outlet pipe, the nitrification cavity is equipped with the nitrification device by nitrification material, and the denitrification cavity is equipped with the denitrification device by denitrification material.Compared with prior art, the present application can simultaneously realize the efficient nitrification of water quality, the maximum degree of removal of toxic substances possibly entering water body and the efficient denitrification of water quality in a single device, and achieve the purpose of self-providing carbon source.

Description

Technical Field

[0001] This invention relates to the field of aquarium purification technology, specifically to an integrated nitrification and denitrification aquarium biochemical purification system. Background Technology

[0002] In the process of raising aquariums and various aquatic animals, the most important link is the nitrogen cycle. The saying "to raise fish, you must first raise the water" means that before you start raising fish, you must first establish the biological and chemical system of the aquarium.

[0003] On a microscopic level, animal excrement and excess fish food residue, as well as other nitrogenous compounds entering the system, are first decomposed by microorganisms, releasing ammonia (NH3) (highly toxic, including free ammonia and total ammonia). The ammonia is then converted into nitrite (NO2) by nitrifying bacteria. - (Poisoning) Nitrosite is eventually converted into nitrate (NO3) by nitrifying bacteria. - (Low toxicity). Conventional biological systems, namely nitrification systems, are limited to this. Although nitrate is low toxicity, it can still have fatal effects on animals if it accumulates to a certain level. Therefore, it is necessary to change the water frequently to maintain nitrate balance.

[0004] The materials used in nitrification systems mainly include bio-cotton, rattan cotton, and various ceramic balls, blocks, rings, and bio-balls. The principle is that the large surface area of ​​these materials allows nitrifying bacteria to attach to them. When water flows through, the nitrifying bacteria absorb ammonia and nitrite from the water as nutrients and ultimately release nitrate as a byproduct. The bacteria continuously live and multiply on these material surfaces, gradually thickening the bacterial film. When it reaches a certain thickness, a dynamic equilibrium is formed between the scouring effect of the water flow and the growth of the bacteria.

[0005] Nitrification systems can be categorized into open (e.g., various open-type filter tanks) and closed-loop (e.g., canister filters). Open-type nitrification systems utilize a large amount of material and open-loop oxygenation, resulting in better performance. However, they require a large footprint and generate high humidity, especially important for tropical fish farming that requires heating. In winter, excessive moisture permeates the environment, and there is a risk of overflow, leading to waterlogging. In contrast, closed-loop nitrification systems require less space, prevent moisture overflow, and do not affect the surrounding humidity. However, their performance is generally not as good as open-type systems.

[0006] Currently, there are some homemade denitrification systems in the industry, but they are all in the research stage and not yet commercialized. These homemade denitrification systems reduce nitrate to nitrite under the action of denitrifying bacteria, and finally reduce it to nitrogen gas. The generated nitrogen gas escapes into the atmosphere, completing the second half of the nitrogen cycle. Since it adds another system, the entire system is cumbersome to install, takes up a lot of space, and is inconvenient to use. It requires constant replenishment of carbon source (the denitrifying bacteria need to consume additional carbon-based nutrients, and the carbon source in the aquarium system itself is far from enough, so liquid carbon source needs to be added or solid carbon source balls need to be placed to provide for the growth and reproduction of bacteria). At present, it is only limited to the experimentation and exploration of the makers.

[0007] Based on the above description, it can be seen that a good nitrification system can eliminate ammonia and nitrite, which is the foundation for fish to survive for a short period (several days). Good nitrification materials and system design can effectively improve digestibility. A good denitrification system can convert nitrate into harmless nitrogen gas that leaves the water, creating a low-nitrogen safe environment in the aquarium for a longer period. However, due to various problems with current products, their application is not widespread, and the results are inconsistent. Furthermore, there are currently no successful cases of systems that integrate nitrification and denitrification simultaneously and effectively.

[0008] Chinese Patent 202110243614.2 discloses a fish tank filtration device for the field of aquarium purification, which includes three filter components connected in sequence. However, compared with the present invention, it uses the first filter component as a solid-liquid separation device, which is obviously different from the present invention. Although the second filter component it uses is a component that promotes the growth and reproduction of nitrifying bacteria, it does not use the unique water flow channel of the present invention for nitrification reaction, nor does it mention the nitrification material used in the present invention for nitrification. It does not disclose the denitrification chamber and denitrification material in the present invention.

[0009] Chinese Patent 201811551407.8 discloses a self-flowing, non-powered integrated sewage purification tank, which is mainly used in the field of sewage treatment. It includes a nitrification chamber and several denitrification chambers. However, its structure is obviously much more complex than that of the present invention. Furthermore, there is no effective solid-liquid separation before the nitrification chamber, no unique water flow channel to achieve the purpose of diversion, and the nitrification and denitrification materials of the present invention are not disclosed.

[0010] Chinese Patent 201520962498.X discloses an integrated synchronous nitrification and denitrification wastewater treatment device for use in the field of wastewater treatment. It mainly includes one or more stages of synchronous nitrification and denitrification biological filters and several supporting devices. The structure is complex. It does not disclose the unique water flow channel of the present invention to achieve the purpose of diversion, nor does it disclose the nitrification material and denitrification material of the present invention.

[0011] It is evident that in the field of aquarium purification, only nitrification is typically used to achieve purification. However, in the field of wastewater treatment, although nitrification and denitrification processes are involved, their structures are often more complex, requiring a large number of supporting devices to achieve the final filtration of wastewater. Summary of the Invention

[0012] The purpose of this invention is to provide an integrated nitrification and denitrification aquarium biochemical purification system.

[0013] The objective of this invention is achieved through the following technical solution:

[0014] A nitrification-denitrification integrated aquarium biological purification system includes a tank and an inlet pipe and an outlet pipe that connect the inside of the tank to the outside. The tank is provided with an inlet chamber, at least one nitrification chamber, at least one denitrification chamber, and an outlet chamber that are independent of each other but connected in sequence. The nitrification chamber is also connected to the outlet chamber. The inlet pipe is connected to the inlet chamber, and the outlet pipe is connected to the outlet chamber. The nitrification chamber is equipped with a nitrification device made of nitrifying material, and the denitrification chamber is equipped with a denitrification device made of denitrifying material.

[0015] The chamber also includes an independent diversion chamber, connecting the nitrification chamber and the denitrification chamber, as well as the effluent chamber. Water from the inlet pipe flows into the inlet chamber and then into the nitrification chamber from below. After nitrification in at least one nitrification chamber, the water flows into the diversion chamber for further diversion. A portion of the water flows into the effluent chamber and exits through the effluent pipe, while the other portion flows into the denitrification chamber. After denitrification in at least one denitrification chamber, the water then re-enters the effluent chamber and exits through the effluent pipe. This invention, through the aforementioned water diversion method, simultaneously achieves highly efficient nitrification, maximum removal of potentially toxic substances from the water body, and highly efficient denitrification within a single device, thus achieving the goal of self-sufficiency in carbon sources.

[0016] The tank is equipped with multiple partitions, dividing it into an inlet chamber, an outlet chamber, a diversion chamber, a nitrification chamber, and a denitrification chamber. The inlet chamber, outlet chamber, and diversion chamber are sequentially arranged along the width of the tank and are located in the middle of the tank. The nitrification chamber and denitrification chamber are located on opposite sides of the tank. In other words, the tank is divided into three independent sections from back to front: a rear section, a middle section, and a front section. The rear section is divided into at least one independent nitrification chamber; the middle section is divided into an independent inlet chamber, an outlet chamber, and a diversion chamber, arranged sequentially; and the front section is divided into at least one independent denitrification chamber.

[0017] The partition plate between the inlet chamber and the nitrification chamber is provided with an inlet-nitrification water flow channel; the partition plate between the nitrification chamber and the branching chamber is provided with a nitrification-branching water flow channel; the partition plate between the branching chamber and the outlet chamber is provided with a branching-outlet water flow channel; the partition plate between the branching chamber and the denitrification chamber is provided with a branching-denitrification water flow channel; and the partition plate between the denitrification chamber and the outlet chamber is provided with a denitrification-outlet water flow channel.

[0018] A water flow regulating valve is installed at the diversion-outlet water flow channel. The water flow rate entering the outlet chamber from the diversion chamber is regulated by the water flow regulating valve, thereby adjusting the water flow ratio between the outlet chamber and the denitrification chamber.

[0019] The water flow regulating valve includes a long screw, which is horizontally positioned. One end of the long screw is located outside the housing and is used to rotate and adjust its horizontal position. The other end of the long screw faces the diversion-outlet water flow channel. The water flow in the channel is directly adjusted by rotating the long screw. In this invention, a channel is isolated at the bottom of the diversion chamber by a horizontally placed auxiliary partition. A water flow regulating valve is installed in this channel, and the water flow regulating valve includes a threaded tightening device. Figure 4 (The threaded device is not shown in detail in the diagram; you can refer to the existing equipment for setup.) It is used to adjust the opening of the diversion-outflow channel, that is, to adjust the diversion ratio.

[0020] In each independent nitrification or denitrification chamber, the water inlet channel and the water outlet channel are respectively set up one above the other, that is, when one is located above, the other is located below.

[0021] When there are at least two nitrification chambers, a nitrification-nitrification water flow channel is provided on the partition plate between adjacent nitrification chambers. The nitrification chamber near the inlet chamber is connected to the inlet chamber, that is, the inlet-nitrification water flow channel is provided on the partition plate between the nitrification chamber and the inlet chamber. The nitrification chamber near the branch chamber is connected to the branch chamber, that is, the nitrification-branching water flow channel is provided on the partition plate between the nitrification chamber and the branch chamber.

[0022] When there are at least two denitrification chambers, a denitrification-denitrification water flow channel is provided on the partition plate between adjacent denitrification chambers. The denitrification chamber near the branch chamber is connected to the branch chamber, that is, the branch-denitrification water flow channel is provided on the partition plate between the branch chamber and the denitrification chamber. The denitrification chamber near the effluent chamber is connected to the effluent chamber, that is, the denitrification-effluent water flow channel is provided on the partition plate between the denitrification chamber and the effluent chamber.

[0023] The inlet chamber is equipped with a solid-liquid separation device, which includes an internal pipe and a baffle. The internal pipe is open at both ends, with its top end connected to the inlet pipe and its bottom end located at the lower part of the inlet chamber. The baffle is located on the inner wall of the inlet chamber, which is actually the inner wall of the tank. The vertical height of the baffle is higher than the vertical height of the bottom of the internal pipe, and the baffle is located below the inlet-nitrification water flow channel. The water flowing in from the inlet pipe generally contains fish feces, fish food, plant leaves, or other solid matter. Because the bottom end of the internal pipe is located at the lower part of the inlet chamber, and the height of the baffle is higher than the bottom of the internal pipe, and the baffle is located below the inlet-nitrification water flow channel, these solid substances, after flowing out of the internal pipe with the water flow, will continue to flow upwards into the inlet-nitrification water flow channel. However, due to the presence of the baffle, they will be blocked and accumulate at the lower part of the inlet chamber.

[0024] The solid-liquid separation device isolates fish feces, fish food, or other solid substances entering from the inlet pipe at the bottom of the inlet chamber, while the water flows normally into the subsequent nitrification and denitrification devices.

[0025] The baffle is set at a horizontal upward tilt of 12-23°, and the length of the baffle is 25-50% of the width of the water inlet cavity. At this time, the vertical height of the lowest point of the baffle is higher than the vertical height of the lowest point of the pipe inside the cavity.

[0026] A sludge discharge port is provided through the wall of the box located on one side of the water inlet chamber, and the sludge discharge port connects the water inlet chamber to the outside.

[0027] The vertical height of the sludge discharge port is lower than the height of the bottom of the pipe inside the cavity, and preferably located at the bottom of the tank, so that solid matter accumulated in the lower part of the water inlet cavity can be completely discharged and cleaned.

[0028] The sludge discharge port is equipped with a detachable sealing structure.

[0029] The sealing structure can be a plug or a sealing cap.

[0030] The bottom end of the water outlet pipe extends into the lower part of the water outlet chamber.

[0031] The nitration device includes multiple stacked or side-by-side nitration modules. Each nitration module includes a nitration shell, multiple intermediate nitration support frames, and nitration material. The top and bottom surfaces of the nitration shell are open. Multiple interconnected nitration through holes are uniformly provided on the nitration shell. The interior of the nitration shell is hollow. Multiple intermediate nitration support frames are disposed inside the nitration shell and divide the interior of the nitration shell into multiple independent nitration material receiving cavities. The nitration material is located inside the nitration material receiving cavities.

[0032] Multiple intermediate nitration support frames are perpendicular to each other.

[0033] The nitrifying material is a porous composite material, which includes at least one of ceramic or activated carbon materials. The nitrifying material of this invention uses a porous composite material with an intermediate support frame for isolation, which facilitates thorough and uniform mixing of water flow, allowing the bacterial community to more easily reach dynamic equilibrium, fully develop, and not clog the pores. Compared with traditional granular ceramic materials or single activated carbon materials, the porous composite material serves as the incubation, reproduction, and workplace for nitrifying bacteria, enabling highly efficient nitrification. In the nitrification stage, ammonia nitrogen is converted into nitrite nitrogen, and further into nitrate nitrogen. The reaction includes: NH4+... 4+ +2O2→NO 3- +2H + +H2O.

[0034] The porous composite material has pore cross-sectional dimensions ranging from 1.0×1.0 to 20.0×20.0 mm, pore diameters ranging from 1.0 to 20.0 mm, and pore shapes that are rectangular, polygonal, or circular. The porous composite material provides a significantly larger reaction area and achieves performance far exceeding that of traditional materials. Furthermore, through high adsorption, the porous composite material can remove various heavy metals, chlorine, toxic organic chemicals, pesticide residues, antibiotics, and other substances that may enter the system.

[0035] The denitrification device includes multiple stacked or side-by-side denitrification modules. Each denitrification module includes a denitrification shell, multiple intermediate denitrification support frames, and denitrification material. The top and bottom surfaces of the denitrification shell are open, and the interior of the shell is hollow. The intermediate denitrification support frames are disposed inside the shell, dividing it into multiple independent denitrification material receiving cavities. The denitrification material is located within these cavities. This invention, through multi-layered assembly and intermediate denitrification support frames, facilitates thorough and uniform mixing of water flow, allowing the bacterial community to more easily reach dynamic equilibrium, fully develop, and avoid clogging the channels.

[0036] Multiple denitrification intermediate support frames are perpendicular to each other.

[0037] The denitrification material is a porous, biodegradable polymer, comprising at least one of PLA, PCL, or PBS. Compared to traditional granular, single, or composite biodegradable materials, this porous, biodegradable polymer material serves simultaneously as an incubator, breeding, and workplace for denitrifying bacteria, while also providing them with the necessary carbon source nutrients. Furthermore, the slow release rate of this material satisfies the needs of microbial growth and the denitrification system, without the difficulty in controlling and water pollution issues associated with traditional liquid carbon sources. In the denitrification stage, nitrate / nitrite nitrogen is converted into inorganic nitrogen gas, thus achieving harmlessness and thorough water purification. The reaction includes: 6NO 2- +3CH3OH→3N2+3CO2+3H2O+6OH - .

[0038] The porous biodegradable polymer material has pores with cross-sectional dimensions ranging from 1.0×1.0 to 20.0×20.0 mm, pore diameter ranging from 1.0 to 20.0 mm, and pore shape that is rectangular, polygonal, or circular.

[0039] The porous biodegradable polymer material has a pore density of 20–170 cpsi (pores per square inch), a wall thickness of 0.2–5.0 mm, a pore diameter preferably of 1–10 mm, transversely distributed perforations, and a pore diameter further preferably of 0.5–5 mm. The distance between the pores is not limited.

[0040] The top of the housing is detachably equipped with a top cover. The top cover has a through-hole for the water inlet pipe and an outlet pipe. The top cover also has a one-way vent valve and a water pump. The outlet pipe is connected to the water pump, which has a controller electrically connected to an external control center. The one-way vent valve discharges stagnant gas generated in the outlet chamber out of the housing. The water pump enables the entire system to continuously and automatically circulate.

[0041] The one-way exhaust valve is a push-button type exhaust valve.

[0042] Biological nitrification and denitrification are methods that utilize various microorganisms to perform nitrification and denitrification reactions, converting ammonia nitrogen in wastewater into nitrogen gas, thereby achieving the desired treatment effect. Nitrification occurs under aerobic conditions, where nitrifying bacteria convert ammonia into nitrite and nitrate. Denitrification occurs under low-oxygen or anaerobic conditions, where denitrifying bacteria convert nitrite and nitrate in wastewater into nitrogen (N2).

[0043] The positive and progressive effects of this invention are as follows: This invention employs an integrated nitrification and denitrification aquarium biological purification system for aquarium purification applications. By significantly reducing water changes, even by orders of magnitude, it increases convenience and user-friendliness, and plays a crucial role in greatly reducing freshwater resource consumption and lowering environmental pollution emissions. This invention can also be applied to constructed wetland technology, providing better ideas and development directions for wastewater treatment technology, and can be directly adopted for engineering applications. Attached Figure Description

[0044] Figure 1 This is a perspective view of an integrated nitrification and denitrification aquarium biochemical purification system according to the present invention;

[0045] Figure 2 A 3D view of an integrated nitrification and denitrification aquarium biological purification system from another angle;

[0046] Figure 3 A top view of an integrated nitrification and denitrification aquarium biological purification system;

[0047] Figure 4 for Figure 3 Sectional view of AA;

[0048] Figure 5 for Figure 3 BB section view;

[0049] Figure 6 for Figure 3 CC section view;

[0050] Figure 7 for Figure 3 DD section view;

[0051] Figure 8 An exploded view of an integrated nitrification and denitrification aquarium biological purification system;

[0052] Figure 9 This is a schematic diagram of the internal structure of the box;

[0053] Figure 10 This is a structural diagram of the rear and middle sections inside the enclosure;

[0054] Figure 11 This is a schematic diagram of the water circuit during nitrification in this invention;

[0055] Figure 12 This is a structural diagram of the rear, middle, and front sections of the box's interior.

[0056] Figure 13 This is a schematic diagram of the water circuit during denitrification in this invention;

[0057] Figure 14This is a schematic diagram of a nitration apparatus according to the present invention;

[0058] Figure 15 This is a schematic diagram of one structure of the denitrification device of the present invention.

[0059] In the diagram: 1-Box body; 11-Inlet pipe; 12-Outlet pipe; 13-Top cover; 14-One-way vent valve; 15-Water pump; 2-Inlet chamber; 21-Internal pipe; 22-Baffle; 23-Sludge discharge port; 24-Sealing structure; 3-Outlet chamber; 4-Nitrification chamber; 41-Nitrification device; 411-Nitrification outer shell; 412-Nitrification intermediate support frame; 413-Nitrification material receiving chamber; 414-Nitrification through hole; 5-Diversion chamber; 6-Denitrification chamber; 61-Denitrification chamber; Nitrification unit; 611-Denitrification outer shell; 612-Denitrification intermediate support frame; 613-Denitrification material receiving cavity; 71-Inlet-nitrification water flow channel; 72-Nitrification-nitrification water flow channel; 73-Nitrification-diversion water flow channel; 74-Diversion-outlet water flow channel; 75-Diversion-denitrification water flow channel; 76-Denitrification-denitrification water flow channel; 77-Denitrification-outlet water flow channel; 8-Water flow regulating valve; 9-Divider plate; 10-Auxiliary partition plate. Detailed Implementation

[0060] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0061] Example

[0062] like Figure 1 , 2 As shown in figures 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 ( Figure 4 , 7 The unlabeled arrows in 11 and 13 indicate the direction of water flow. A nitrification-denitrification integrated aquarium biological purification system includes a tank 1 and an inlet pipe 11 and an outlet pipe 12 connecting the inside and outside of the tank 1, respectively. A detachable top cover 13 is provided on the top of the tank 1. The top cover 13 has an inlet hole for the inlet pipe 11 and an outlet hole for the outlet pipe 12. The top cover 13 also has a one-way vent valve 14 (e.g., ...). Figure 1 (As shown) and water pump 15, water outlet pipe 12 is connected to water pump 15, water pump 15 is equipped with a controller, the controller is electrically connected to an external control center, one-way exhaust valve 14 is a push-type exhaust valve, nitrification chamber 4 is equipped with nitrification device 41 made of nitrification material, denitrification chamber 6 is equipped with denitrification device 61 made of denitrification material.

[0063] like Figure 4 , 5 As shown in numbers 6, 7, 8, 9, 10, 11, 12, and 13 ( Figure 11(Auxiliary partitions omitted), the tank 1 is equipped with multiple partitions 9, dividing the tank 1 into an inlet chamber 2, an outlet chamber 3, a diversion chamber 5, at least one nitrification chamber 4, and at least one denitrification chamber 6. The inlet chamber 2, nitrification chamber 4, diversion chamber 5, denitrification chamber 6, and outlet chamber 3 are independent of each other but sequentially connected. The diversion chamber 5 is also connected to the outlet chamber 3. In this embodiment, the tank 1 is divided into three independent parts from back to front: a rear section, a middle section, and a front section. The rear section is divided into two independent nitrification chambers 4, the middle section is divided into an independent inlet chamber 2, outlet chamber 3, and diversion chamber 5, which are arranged sequentially. The front section is divided into two independent denitrification chambers 6 (e.g., ...). Figure 8 , 9 As shown in Figures 10, 11, 12, and 13, the partition plate 9 located between the inlet chamber 2 and the nitrification chamber 4 has an inlet-nitrification water flow channel 71 below it; the partition plate 9 located between adjacent nitrification chambers 4 has a nitrification-nitrification water flow channel 72 above it; the partition plate 9 located between the nitrification chamber 4 and the branch chamber 5 has a nitrification-branching water flow channel 73 below it; and an auxiliary partition plate 10 is horizontally suspended at the bottom of the branch chamber 5 to create a channel. The upper part has holes, and the partition plate 9 located between the diversion chamber 5 and the outlet chamber 3 also has holes at its bottom. The two holes and the channel together form the diversion-outlet water flow channel 74 (this auxiliary partition plate can be regarded as an extension of the partition plate). A water flow regulating valve 8 is installed in this channel. The water flow regulating valve 8 includes a long screw, which is set horizontally. One end of the long screw is located outside the housing 1, and the main body of the long screw is located in the diversion-outlet water flow channel 74, located between the diversion chamber 5 and the outlet chamber 3. The partition plate 9 between the nitrification chambers 6 has a diversion-denitrification water flow channel 75 above it, the partition plate 9 between adjacent denitrification chambers 6 has a denitrification-denitrification water flow channel 76 below it, and the partition plate 9 between the denitrification chamber 6 and the effluent chamber 3 has a denitrification-effluent water flow channel 77 above it. The inlet pipe 11 is connected to the inlet chamber 2, and the inlet chamber 2 is equipped with a solid-liquid separation device, which includes an internal pipe 21 and a baffle 22. Both ends are open, with the top end connected to the inlet pipe 11 and the bottom end located at the lower part of the inlet chamber 2. A baffle 22 is installed on the inner wall of the inlet chamber 2, which is actually located on the inner wall of the tank 1. The vertical height of the baffle 22 is higher than the vertical height of the bottom of the pipe 21 inside the chamber. The baffle 22 is located below the inlet-nitrification water flow channel 71. The baffle 22 is horizontally inclined upwards at 12-23°, and its length is 25-50% of the width of the inlet chamber 2 (this length refers to...). Figure 4(The length of the visible side based on the viewing angle) A mud discharge port 23 is provided at the bottom of the wall of the box 1 located on one side of the water inlet chamber 2. The mud discharge port 23 connects the water inlet chamber 2 and the outside. The vertical height of the mud discharge port 23 is lower than the height of the bottom of the pipe 21 inside the chamber. A sealing structure 24 is detachably provided at the mud discharge port 23. The sealing structure 24 can be a block or a sealing cover. The water outlet pipe 12 is connected to the water outlet chamber 3. The bottom end of the water outlet pipe 12 extends into the lower part of the water outlet chamber 3.

[0064] like Figure 6 , 8 As shown in Figures 9 and 14, the nitration device 41 includes multiple stacked or side-by-side nitration modules. Each nitration module includes a nitration shell 411, multiple intermediate nitration support frames 412, and nitration material. The top and bottom surfaces of the nitration shell 411 are open. Multiple interconnected nitration through holes 414 are uniformly provided on the nitration shell 411. The interior of the nitration shell 411 is hollow. The multiple intermediate nitration support frames 412 are perpendicularly arranged inside the nitration shell 411, dividing the interior of the nitration shell 411 into multiple independent nitration material receiving cavities 413. The nitration material is located within the nitration material receiving cavities 413. The nitration material is a porous composite material, which includes at least one of ceramic or activated carbon materials. The cross-sectional dimensions of the pores in the porous composite material are in the range of 1.0×1.0 to 20.0×20.0 mm, the diameter of the pores is in the range of 1.0 to 20.0 mm, and the shape of the pores is rectangular, polygonal, or circular.

[0065] like Figure 5 , 8 As shown in Figures 9 and 15, the denitrification device 61 includes multiple stacked or side-by-side denitrification modules. Each denitrification module includes a denitrification shell 611, multiple denitrification intermediate support frames 612, and denitrification material. The top and bottom surfaces of the denitrification shell 611 are open, and the interior of the denitrification shell 611 is hollow. Multiple denitrification intermediate support frames 612 are arranged perpendicularly to each other inside the denitrification shell 611, dividing the interior of the denitrification shell 611 into multiple independent denitrification material receiving cavities 613. The denitrification material is located in the denitrification material receiving cavity 613. The denitrification material is a porous biodegradable polymer material, which includes at least one of PLA, PCL, or PBS. The cross-sectional size of the pores in the porous biodegradable polymer material is in the range of 1.0×1.0 to 20.0×20.0 mm, the diameter of the pores is in the range of 1.0 to 20.0 mm, and the shape of the pores is rectangular, polygonal, or circular. The pore density of the porous biodegradable polymer material is 20 to 170 cpsi (the number of pores per square inch), the wall thickness is in the range of 0.2 to 5.0 mm, the pore diameter is preferably 1 to 10 mm, the pores are transversely distributed, and the pore diameter is further preferably 0.5 to 5 mm. The distance between the pores is not limited.

[0066] Reference Figure 10 and Figure 11 Under the action of water pump 15, water from inlet pipe 11 is introduced into tank 1 through negative pressure, and then enters inlet chamber 2 through internal pipe 21. Due to the action of baffle 22, solid-liquid separation is achieved, and solid matter is isolated at the bottom of inlet chamber 2. The water after solid-liquid separation enters the nitrification chamber 4 on the right side through inlet-nitrification water flow channel 71 located above baffle 22 for nitrification. The water flows through the upper nitrification-nitrification water flow channel 72 into the left nitrification chamber 4 for further nitrification. The water flows through the lower nitrification-diversion water flow channel 73 into diversion chamber 5 for diversion. A portion of the water flows through the lower diversion-outlet water flow channel 74 into outlet chamber 3. Under the action of water pump 15, the water flows out through outlet pipe 12. The water flow channel 74 controls the flow rate of this portion of the water through water flow regulating valve 8. (Refer to...) Figure 12 and 13 Another part of the water flow in the diversion chamber 5 enters the denitrification chamber 6 on the left through the upper diversion-denitrification water flow channel 75 for denitrification. The water flow enters the denitrification chamber 6 on the right through the lower denitrification-denitrification water flow channel 76 for further denitrification. The water flow enters the outlet chamber 3 through the upper denitrification-outlet water flow channel 77 and is discharged through the outlet pipe 12 under the action of the water pump 15.

[0067] This invention integrates a nitrification device 41 and a denitrification device 61 within a housing 1. Water flows through the inlet pipe 11 into the inlet chamber 2, then through the water flow channel into the nitrification device 41 in the nitrification chamber 4 for nitrification. After nitrification, a portion of the water in the nitrification chamber 4 flows through the outlet chamber 3 to the outlet pipe 12 for discharge. The remaining water in the nitrification chamber 4 flows through the water flow channel into the denitrification chamber 6 for denitrification, then flows through the outlet chamber 3 to the outlet pipe 12 for discharge. This invention, through the aforementioned water flow diversion method, simultaneously achieves efficient nitrification, maximum removal of potentially toxic substances from the water body, and efficient denitrification within a single device, thus achieving the goal of self-sufficiency in carbon sources.

[0068] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A combined nitrification and denitrification aquarium biological purification system, characterized in that, The aquarium biochemical purification system includes a tank (1) and an inlet pipe (11) and an outlet pipe (12) that connect the inside of the tank (1) to the outside. The tank (1) is provided with an inlet chamber (2), at least one nitrification chamber (4), at least one denitrification chamber (6) and an outlet chamber (3) that are independent of each other but connected in sequence. The nitrification chamber (4) is also connected to the outlet chamber (3). The inlet pipe (11) is connected to the inlet chamber (2). The outlet pipe (12) is connected to the outlet chamber (3). The nitrification chamber (4) is provided with a nitrification device (41) made of nitrification material. The denitrification chamber (6) is provided with a denitrification device (61) made of denitrification material. The box (1) is also provided with an independent diversion chamber (5). The nitrification chamber (4) and the denitrification chamber (6) are connected through the diversion chamber (5). The nitrification chamber (4) and the effluent chamber (3) are also connected through the diversion chamber (5). The effluent from the nitrification chamber (4) is connected to the diversion chamber (5) through the nitrification-diversion water flow channel (73). The diversion chamber (5) is connected to the effluent chamber (3) through the diversion-effluent water flow channel (74) and to the denitrification chamber (6) through the diversion-denitrification water flow channel (75). A water flow regulating valve (8) is provided at the diversion-outlet water flow channel (74) to regulate the water flow ratio between the outlet chamber (3) and the denitrification chamber (6).

2. The integrated nitrification and denitrification aquarium biological purification system according to claim 1, characterized in that, The box (1) is provided with multiple partition plates (9) to divide the box (1) into an inlet chamber (2), an outlet chamber (3), a diversion chamber (5), a nitrification chamber (4), and a denitrification chamber (6). The inlet chamber (2), the outlet chamber (3), and the diversion chamber (5) are arranged sequentially along the width direction of the box (1) and are located in the middle of the box (1). The nitrification chamber (4) and the denitrification chamber (6) are located on both sides of the box (1).

3. The integrated nitrification and denitrification aquarium biological purification system according to claim 2, characterized in that, A water inlet-nitrification water flow channel (71) is provided on the partition plate (9) between the water inlet chamber (2) and the nitrification chamber (4), a nitrification-diversion water flow channel (73) is provided on the partition plate (9) between the nitrification chamber (4) and the diversion chamber (5), a diversion-emission water flow channel (74) is provided on the partition plate (9) between the diversion chamber (5) and the outlet chamber (3), a diversion-denitrification water flow channel (75) is provided on the partition plate (9) between the diversion chamber (5) and the denitrification chamber (6), and a denitrification-emission water flow channel (77) is provided on the partition plate (9) between the denitrification chamber (6) and the outlet chamber (3).

4. The integrated nitrification and denitrification aquarium biological purification system according to claim 3, characterized in that, Each independent nitrification chamber (4) or denitrification chamber (6) has an inlet water channel and an outlet water channel, one above the other.

5. The integrated nitrification and denitrification aquarium biological purification system according to claim 3, characterized in that, The water inlet chamber (2) is equipped with a solid-liquid separation device, which includes an inner pipe (21) and a baffle (22). The inner pipe (21) is open at both ends, with its top end connected to the water inlet pipe (11) and its bottom end located at the lower part of the water inlet chamber (2). The baffle (22) is set on the inner wall of the water inlet chamber (2), and the vertical height of the baffle (22) is higher than the vertical height of the bottom end of the inner pipe (21). The baffle (22) is located below the water inlet-nitrification water flow channel (71).

6. The integrated nitrification and denitrification aquarium biological purification system according to claim 5, characterized in that, A mud discharge port (23) is provided through the wall of the box (1) located on one side of the water inlet chamber (2), and the mud discharge port (23) connects the water inlet chamber (2) and the outside. A sealing structure (24) can be detachably provided at the mud discharge port (23).

7. The integrated nitrification and denitrification aquarium biological purification system according to claim 1, characterized in that, The nitration device (41) includes multiple stacked or side-by-side nitration modules. Each nitration module includes a nitration shell (411), multiple nitration intermediate support frames (412), and nitration material. The top and bottom surfaces of the nitration shell (411) are open. Multiple nitration through holes (414) with internal and external communication are uniformly provided on the nitration shell (411). The interior of the nitration shell (411) is hollow. Multiple nitration intermediate support frames (412) are arranged inside the nitration shell (411) and divide the interior of the nitration shell (411) into multiple independent nitration material receiving cavities (413). The nitration material is located in the nitration material receiving cavity (413). The nitrifying material is a porous composite material, which contains at least one of ceramic material or activated carbon material.

8. The integrated nitrification and denitrification aquarium biological purification system according to claim 1, characterized in that, The denitrification device (61) includes multiple stacked or side-by-side denitrification modules. Each denitrification module includes a denitrification shell (611), multiple denitrification intermediate support frames (612), and denitrification material. The top and bottom surfaces of the denitrification shell (611) are open. The interior of the denitrification shell (611) is hollow. Multiple denitrification intermediate support frames (612) are arranged inside the denitrification shell (611) and divide the interior of the denitrification shell (611) into multiple independent denitrification material receiving cavities (613). The denitrification material is located in the denitrification material receiving cavity (613). The denitrification material is a porous biodegradable polymer material, which includes at least one of PLA, PCL or PBS.

9. The integrated nitrification and denitrification aquarium biological purification system according to claim 1, characterized in that, The top of the housing (1) is detachably provided with a top cover (13). The top cover (13) is provided with a water inlet hole through which the water inlet pipe (11) passes and a water outlet hole through which the water outlet pipe (12) passes. The top cover (13) is also provided with a one-way exhaust valve (14) and a water pump (15). The water outlet pipe (12) and the water pump (15) are connected. The water pump (15) is provided with a controller. The controller is electrically connected to an external control center.

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