Staged aquaculture wastewater treatment device

Abstract

The utility model discloses a staged aquaculture wastewater treatment device which comprises a device main body, and five filtering chambers are sequentially arranged in the device main body at intervals from top to bottom; a quartz sand filter material is arranged in the first filter chamber; straw particle and biochar mixed filter materials are arranged in the second filter chamber and the third filter chamber; fiber ball filter materials are arranged in the fourth filter chamber and the fifth filter chamber; a wastewater inlet and a clear water inlet are formed in the top of the device body; a water outlet is formed in the bottom of the device body; water flowing into the device main body through the wastewater inlet and the clear water inlet can sequentially flow through the five filtering chambers and finally flows out from the water outlet; a spiral stirring rod is arranged in each of the five filter chambers and can rotate in the corresponding filter chamber to stir the filter material; a filter material inlet pipe and a filter material outlet pipe are respectively arranged on the outer side of the device main body corresponding to the five filter chambers; and the filter material inlet pipe and the filter material outlet pipe are used for providing filter material inlet and outlet channels for the corresponding filter chambers.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a graded aquaculture wastewater treatment device. Background Art

[0002] Aquaculture wastewater has the characteristics of large output, complex chemical composition and easy to cause eutrophication of water bodies. It has become a bottleneck problem restricting the current development of aquaculture industry. It has received great attention, but the entire aquaculture market system is still not sound, and most aquaculture wastewater has not been properly treated, which seriously restricts ecological sustainable development. The filtration method for treating aquaculture wastewater has the advantages of high efficiency and feasibility. It has been widely used. Suspended matter and a large number of chemical substances in aquaculture wastewater can be removed by filtration. The suspended matter obtained after treatment can also be anaerobic composted to achieve effective utilization of resources, which is conducive to achieving ecological sustainable development, making the development prospects of filtration treatment of aquaculture wastewater broad.

[0003] For example, the specification of Chinese utility model patent CN219239300U discloses a fiber ball filter for filtering ammonia nitrogen wastewater, including a connected tank body and a tank cover, and also includes a plurality of storage cylinders abutting each other. By placing the fiber balls in the storage cylinders, the fiber balls in the storage cylinders arranged in layers can be filtered. When the fiber balls in the top storage cylinder are completely unusable, the tank body is opened to directly replace the storage cylinder with the fiber balls. Although this avoids the waste of fiber balls caused by all the fiber balls piling up together and grabbing and replacing them, the storage cylinder is located inside the tank body, so the operating space is limited. Moreover, when the weight of the storage cylinder filled with fiber balls is large, it may be necessary to use external equipment, which will make the filter material replacement operation more time-consuming and laborious. In addition, multiple storage cylinders are stacked to form multiple filter layers, but each filter layer uses fiber balls for filtration, which is costly. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a graded aquaculture wastewater treatment device, in which filter material replacement does not require heavy lifting, and the operation is labor-saving and convenient; a variety of filter materials are used for graded filtration, which ensures a high filtering effect while reducing the cost of filter material use.

[0005] The utility model provides a hierarchical aquaculture wastewater treatment device, comprising a device body, wherein a first filter chamber, a second filter chamber, a third filter chamber, a fourth filter chamber and a fifth filter chamber are sequentially arranged from top to bottom in the device body; a quartz sand filter material is arranged in the first filter chamber; a straw particle and biochar mixed filter material is arranged in the second filter chamber and the third filter chamber; a fiber ball filter material is arranged in the fourth filter chamber and the fifth filter chamber;

[0006] A wastewater inlet and a clean water inlet are provided at the top of the device body; a water outlet is provided at the bottom of the device body; water flowing into the device body through the wastewater inlet and the clean water inlet can flow through the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the fifth filter chamber in sequence, and finally flow out from the water outlet;

[0007] A spiral stirring rod is disposed in each of the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the fifth filter chamber, and the spiral stirring rod can rotate and stir the filter material in the corresponding filter chamber;

[0008] The outside of the device body corresponding to the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the fifth filter chamber are respectively provided with a filter material inlet pipe and a filter material outlet pipe; the filter material inlet pipe and the filter material outlet pipe are used to provide a channel for the filter material to enter and exit the corresponding filter chamber.

[0009] In the above-mentioned graded aquaculture wastewater treatment device, before filtering, the corresponding filter material can be added to each filter chamber through the filter material inlet pipe, and in the process of continuous addition of filter material, with the stirring effect of the spiral stirring rod, the added filter material will not accumulate at the pipe mouth, but will be approximately evenly distributed in the filter chamber, and the adding operation is simple and fast; similarly, after filtering, through the filter material outlet pipe, with the pushing effect of the spiral stirring rod and the flushing effect of the clean water inlet flow, the filter material of each filter chamber can be simply and quickly discharged, so that the loading and discharging operations of the filter material are labor-saving. In addition, quartz sand filter material has low cost and easy regeneration, straw particles and biochar mixed filter material cost and regeneration difficulty are in the middle, and fiber ball particle filter material cost and regeneration difficulty are the highest; therefore, when the device is filtered, the aquaculture wastewater is first filtered through quartz sand filter material, then filtered through two layers of straw particles and biochar mixed filter material, and finally filtered through two layers of fiber ball particle filter material. The consumption of the front quartz sand filter material is the largest, which can greatly reduce the cost of filter material use and effectively ensure the filtering effect.

[0010] Furthermore, a solid-liquid separation screw conveyor is arranged above the main body of the device, and a feed port, a solid outlet and a liquid outlet are arranged on the solid-liquid separation screw conveyor; the feed port is used to introduce aquaculture wastewater; the solid outlet is used to discharge floating waste in the aquaculture wastewater; the liquid outlet is connected to the wastewater inlet, and is used to introduce the aquaculture wastewater after the floating waste is removed into the main body of the device.

[0011] Aquaculture wastewater enters the solid-liquid separation screw conveyor from the feed inlet. The cylinder wall of the solid-liquid separation screw conveyor adopts a drainage structure, which can achieve solid-liquid separation, so that floating waste is discharged through the solid outlet, and liquid waste is passed into the main body of the device through the liquid outlet and the wastewater inlet.

[0012] Furthermore, the device body comprises a vertically placed cylindrical body, the top end of which is sealed with a circular cover plate, and the bottom end of which is sealed with a funnel-shaped bottom cover. A wastewater inlet and a clean water inlet are arranged on the cover plate; and a water outlet is arranged at the bottom of the bottom cover.

[0013] Preferably, the bottom of the cylindrical body is provided with supporting legs, and the supporting legs are used to support the entire device.

[0014] Furthermore, the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the fifth filter chamber are respectively formed by the space enclosed by the upper partition plate, the lower partition plate and the inner wall of the cylindrical body.

[0015] Furthermore, the filter material inlet pipe penetrates the side wall of the cylindrical body from the top of the corresponding filter chamber; the filter material outlet pipe penetrates the side wall of the cylindrical body from the bottom of the corresponding filter chamber.

[0016] Preferably, the filter material inlet pipe and the filter material outlet pipe are both provided with valves for controlling the on-off of the pipeline, which are opened when in use and closed when not in use.

[0017] Furthermore, the spiral stirring rods in the first filter chamber, the second filter chamber, the third filter chamber, the fourth filter chamber and the fifth filter chamber are all arranged on the same drive shaft driven by a motor, and the motor is arranged on the cover plate; the axis of the drive shaft coincides with the axis of the cylindrical body, and the drive shaft rotates through each filter chamber.

[0018] Furthermore, the rod body of the spiral stirring rod is arranged obliquely relative to the axis of the cylindrical body, the middle part is fixed to the driving shaft, one end extends to the edge of the upper partition, and the other end extends to the edge of the lower partition.

[0019] The rotation of the spiral stirring rod can stir the filter material at each height layer in each filter chamber, thereby effectively preventing the filter material from piling up during the process of feeding and discharging the filter material and completing the feeding and discharging quickly.

[0020] Furthermore, the device also includes a water storage structure, which is connected to the clean water inlet through a pipeline and is used to provide clean water to the device body for cleaning or other operations.

[0021] Furthermore, the device also includes a filter material regeneration device, which is used to regenerate the straw particle and biochar mixed filter material, including a nitric acid tank, a flushing tank and a drying chamber. The straw particle and biochar mixed filter material can be regenerated by chemical acidification technology to remove adsorbed substances, thereby realizing the reuse of the filter material, increasing the service life of the filter material, and enhancing the biochar filtration effect, which has good benefits.

[0022] In summary, by adopting the above-mentioned graded aquaculture wastewater treatment device, filter media replacement does not require heavy lifting, and the operation is labor-saving and convenient; a variety of filter media are used for graded filtration to ensure a high filtration effect while reducing the cost of filter media use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 This is a structural cross-sectional view of the utility model's hierarchical aquaculture wastewater treatment device.

[0025] Figure 2 It is a structural cross-sectional view of the utility model of a graded aquaculture wastewater treatment device with a solid-liquid separation screw conveyor.

[0026] Figure 3 This is a structural diagram of the spiral stirring rod of the hierarchical aquaculture wastewater treatment device of the utility model.

[0027] In the figure, 11, cylindrical body; 12, cover plate; 13, bottom cover; 14, support leg; 21, first filter chamber; 22, second filter chamber; 23, third filter chamber; 24, fourth filter chamber; 25, fifth filter chamber; 31, wastewater inlet; 32, clean water inlet; 33, water outlet; 4, water storage structure; 5, solid-liquid separation screw conveyor; 51, feed inlet; 52, solid outlet; 53, liquid outlet; 6, spiral stirring rod; 61, motor; 62, drive shaft; 71, upper partition; 72, lower partition; 73, filter material inlet pipe; 74, filter material outlet pipe. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation modes is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0029] Example 1

[0030] Figure 1-Figure 3 The utility model shows a hierarchical aquaculture wastewater treatment device. Figure 1 As shown, the graded aquaculture wastewater treatment device includes a device body, in which a first filter chamber 21, a second filter chamber 22, a third filter chamber 23, a fourth filter chamber 24 and a fifth filter chamber 25 are sequentially arranged from top to bottom; the first filter chamber 21 is provided with quartz sand filter material; the second filter chamber 22 and the third filter chamber 23 are both provided with straw particles and biochar mixed filter material; the fourth filter chamber 24 and the fifth filter chamber 25 are both provided with fiber ball particle filter material.

[0031] A wastewater inlet 31 and a clean water inlet 32 ​​are provided at the top of the device body; a water outlet 33 is provided at the bottom of the device body; water flowing into the device body through the wastewater inlet 31 and the clean water inlet 32 ​​can flow through the first filter chamber 21, the second filter chamber 22, the third filter chamber 23, the fourth filter chamber 24 and the fifth filter chamber 25 in sequence, and finally flow out from the water outlet 33.

[0032] A spiral stirring rod 6 is respectively disposed in the first filter chamber 21 , the second filter chamber 22 , the third filter chamber 23 , the fourth filter chamber 24 and the fifth filter chamber 25 . The spiral stirring rod 6 can rotate and stir the filter material in the corresponding filter chamber.

[0033] The outer sides of the device bodies corresponding to the first filter chamber 21, the second filter chamber 22, the third filter chamber 23, the fourth filter chamber 24 and the fifth filter chamber 25 are respectively provided with filter material inlet pipes 73 and filter material outlet pipes 74; the filter material inlet pipes 73 and the filter material outlet pipes 74 are used to provide channels for the filter material to enter and exit the corresponding filter chambers.

[0034] Optional, such as Figure 2 As shown, a solid-liquid separation screw conveyor 5 is arranged above the device body, and a feed port 51, a solid outlet 52 and a liquid outlet 53 are arranged on the solid-liquid separation screw conveyor 5; the feed port 51 is used to introduce aquaculture wastewater; the solid outlet 52 is used to discharge floating waste in the aquaculture wastewater; the liquid outlet 53 is connected to the wastewater inlet 31, and is used to introduce the aquaculture wastewater after the floating waste is removed into the device body.

[0035] Aquaculture wastewater enters the solid-liquid separation screw conveyor 5 from the feed port 51. The cylinder wall of the solid-liquid separation screw conveyor 5 adopts a drainage structure, which can achieve solid-liquid separation, so that floating waste is discharged through the solid outlet 52, and liquid waste is passed into the device body through the liquid outlet 53 and the wastewater inlet 31.

[0036] Optional, such as Figure 1 and Figure 2 As shown, the device body includes a vertically placed cylindrical body 11, the top of the cylindrical body 11 is sealed with a circular cover plate 12, and the bottom of the cylindrical body 11 is sealed with a funnel-shaped bottom cover 13. The cover plate 12 is provided with a wastewater inlet 31 and a clean water inlet 32; the bottom of the bottom cover 13 is provided with a water outlet 33. The bottom of the cylindrical body 11 is provided with a support leg 14, which is used to support the entire device.

[0037] Optional, such as Figure 2 As shown, the first filter chamber 21, the second filter chamber 22, the third filter chamber 23, the fourth filter chamber 24 and the fifth filter chamber 25 are respectively formed by the space enclosed by the upper partition 71, the lower partition 72 and the inner wall of the cylindrical body 11. The upper partition 71 and the lower partition 72 can be fixed to the inner wall of the cylindrical body 11 by welding to form five filter chambers.

[0038] Optionally, each filter chamber is filled with corresponding filter material. The upper partition plate 71 and the lower partition plate 72 are provided with water holes, and the hole diameter needs to be smaller than the particle size of the filter material in the corresponding filter chamber.

[0039] Optionally, the filter material inlet pipe 73 penetrates the side wall of the cylindrical body 11 from the top of the corresponding filter chamber; this can reduce the blockage of the pipe mouth when filling the filter material particles, and better feed the material. The filter material outlet pipe 74 penetrates the side wall of the cylindrical body 11 from the bottom of the corresponding filter chamber, and when the filter material particles are cleared out, they can flow into the filter material outlet pipe 74 better under the action of gravity, and the filter material can be discharged more smoothly.

[0040] Optionally, both the filter material inlet pipe 73 and the filter material outlet pipe 74 are provided with valves for controlling the on-off of the pipelines, which are opened when in use and closed when not in use.

[0041] Optional, such as Figure 2 As shown, the spiral stirring rods 6 in the first filter chamber 21, the second filter chamber 22, the third filter chamber 23, the fourth filter chamber 24 and the fifth filter chamber 25 are all arranged on the same drive shaft 62 driven by a motor 61, and the motor 61 is arranged on the cover plate 12; the axis of the drive shaft 62 coincides with the axis of the cylindrical body 11, and the drive shaft 62 rotates through each filter chamber.

[0042] Optional, such as Figure 1-3 As shown, the rod body of the spiral stirring rod 6 is arranged obliquely relative to the axis of the cylindrical body 11 , the middle part is fixed to the driving shaft 62 , one end extends to the edge of the upper partition 71 , and the other end extends to the edge of the lower partition 72 .

[0043] The spiral stirring rod 6 rotates to stir the filter material at each height layer in each filter chamber, thereby effectively preventing the filter material from piling up and quickly completing the feeding and discharging of the filter material during the feeding and discharging of the filter material.

[0044] Optional, such as Figure 2 As shown, the device also includes a water storage structure 4, which is connected to a clean water inlet 32 ​​through a pipeline to provide clean water to the device body for cleaning and other operations.

[0045] Optionally, the particle size of the quartz sand filter material is 0.5-1.0 mm; the particle size of the straw particles in the straw particle and biochar mixed filter material is 2-3 cm, and the particle size of the biochar filter material is 1.0-1.5 mm, and the mixing ratio of the straw particles and the biochar can be (1-2): 1; the particle size of the fiber ball particle filter material is 30-40 mm. Among them, the straw particles can be corn straw particles, and the biochar can be phosphoric acid-modified corn straw biochar. Correspondingly, the aperture of the water hole of the upper partition 71 and the lower partition 72 can be uniformly set to 10-20 μm.

[0046] The filter material filled in the first filter chamber 21 is quartz sand particles, which can remove solid residues in sewage; the filter material filled in the second filter chamber 22 and the third filter chamber 23 is a mixed filter material of crop straw particles with different compression degrees and biochar, and the mixing ratio is 2 to 1:1, which can remove organic matter, nitrogen and phosphorus pollutants in sewage; the filter material filled in the fourth filter chamber 24 and the fifth filter chamber 25 is fiber ball particles, which can remove metal ions in sewage and ensure the filtering effect.

[0047] Optionally, the device further includes a filter material regeneration device, which is used to regenerate the straw particle and biochar mixed filter material, including a nitric acid tank, a flushing tank and a drying chamber. The straw particle and biochar mixed filter material can be regenerated by chemical acidification technology to remove adsorbed substances, thereby realizing the reuse of the filter material, increasing the service life of the filter material, and enhancing the biochar filtration effect, which has good benefits.

[0048] When in use, before filtering, it is necessary to fill the corresponding filter material into each filter chamber, and the example of adding quartz sand particles into the first filter chamber 21 is described as follows: open the filter material inlet pipe 73 of the first filter chamber 21, close the filter material outlet pipe 74 of the first filter chamber 21, and continue to fill the first filter chamber 21 with quartz sand particles through the filter material inlet pipe 73, and at the same time start the motor 61 to drive each spiral stirring rod 6 to rotate, so that the filled quartz sand particles are continuously pushed and evenly distributed to other positions, and finally stop when the set filling amount is reached, and close the filter material inlet pipe 73 to complete the addition. In addition, the five filter chambers can be filled at the same time without interfering with each other.

[0049] During the filtration, the aquaculture wastewater is first introduced into the solid-liquid separation screw conveyor 5 through the feed port 51; then the solid-liquid separation screw conveyor 5 discharges the floating waste from the solid outlet 52, and the remaining liquid is introduced into the top of the inner cavity of the cylindrical body 11 through the liquid outlet 53 and the wastewater inlet 31; then the aquaculture wastewater, under the action of gravity, passes through the first filter chamber 21, the second filter chamber 22, the third filter chamber 23, the fourth filter chamber 24 and the fifth filter chamber 25 in sequence, completing the five-stage filtration, filtering out the suspended solids, colloids, etc. in the water, and finally discharged from the water outlet 33 to complete the filtration. In addition, when filtering, the water outlet 33 can be connected to the water inlet of the water pump to generate a negative pressure suction effect, increase the speed of the liquid flowing through the device body, and increase the filtration speed.

[0050] After filtering, it is necessary to clear out the filter material in a certain filter chamber and replace it with a new one. Take the clearing out of the straw particles and biochar mixed filter material in the second filter chamber 22 as an example: first close the water outlet 33 to stop filtering; then keep all the filter material inlet pipes 73 closed, open the filter material outlet pipe 74 of the second filter chamber 22, and close the filter material outlet pipes 74 of other filter chambers, and start the motor 61 to drive each spiral stirring rod 6 to rotate. At this time, straw particles and biochar mixed filter material will be discharged from the filter material outlet pipe 74; then control the clean water inlet 32 ​​to continuously supply clean water into the cylindrical body 11. After the clean water passes through the first filter chamber 21 and reaches the second filter chamber 22, it will be quickly discharged from the filter material outlet pipe 74 of the second filter chamber 22 with the filter material particles. Note that the filter material can only be cleared out one by one in the five filter chambers. In short, the entire filter material loading and discharging operation is labor-saving, convenient and fast.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit its protection scope. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the utility model, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.

Claims

1. A hierarchical aquaculture wastewater treatment device, characterized in that: The device comprises a main body, wherein a first filter chamber (21), a second filter chamber (22), a third filter chamber (23), a fourth filter chamber (24) and a fifth filter chamber (25) are sequentially arranged from top to bottom in the main body; a quartz sand filter material is arranged in the first filter chamber (21); a straw particle and biochar mixed filter material is arranged in the second filter chamber (22) and the third filter chamber (23); and a fiber ball filter material is arranged in the fourth filter chamber (24) and the fifth filter chamber (25); A wastewater inlet (31) and a clean water inlet (32) are provided at the top of the device body; a water outlet (33) is provided at the bottom of the device body; water flowing into the device body through the wastewater inlet (31) and the clean water inlet (32) can flow through the first filter chamber (21), the second filter chamber (22), the third filter chamber (23), the fourth filter chamber (24) and the fifth filter chamber (25) in sequence, and finally flows out from the water outlet (33); A spiral stirring rod (6) is respectively provided in the first filter chamber (21), the second filter chamber (22), the third filter chamber (23), the fourth filter chamber (24) and the fifth filter chamber (25), and the spiral stirring rod (6) can rotate in the corresponding filter chamber to stir the filter material; A filter material inlet pipe (73) and a filter material outlet pipe (74) are respectively provided on the outer side of the device body corresponding to the first filter chamber (21), the second filter chamber (22), the third filter chamber (23), the fourth filter chamber (24) and the fifth filter chamber (25); the filter material inlet pipe (73) and the filter material outlet pipe (74) are used to provide a channel for the filter material to enter and exit the corresponding filter chamber.

2. A hierarchical aquaculture wastewater treatment device according to claim 1, characterized in that: A solid-liquid separation screw conveyor (5) is arranged above the main body of the device, and the solid-liquid separation screw conveyor (5) is provided with a feed inlet (51), a solid outlet (52) and a liquid outlet (53); the feed inlet (51) is used to introduce aquaculture wastewater; the solid outlet (52) is used to discharge floating waste in the aquaculture wastewater; the liquid outlet (53) is connected to the wastewater inlet (31) and is used to introduce the aquaculture wastewater after the floating waste is removed into the main body of the device.

3. A hierarchical aquaculture wastewater treatment device according to claim 1, characterized in that: The device body comprises a vertically placed cylindrical body (11), the top end of the cylindrical body (11) is sealed with a circular cover plate (12), and the bottom end of the cylindrical body (11) is sealed with a funnel-shaped bottom cover (13).

4. A hierarchical aquaculture wastewater treatment device according to claim 3, characterized in that: The first filter chamber (21), the second filter chamber (22), the third filter chamber (23), the fourth filter chamber (24) and the fifth filter chamber (25) are respectively formed by the space enclosed by the upper partition plate (71), the lower partition plate (72) and the inner wall of the cylindrical body (11).

5. A hierarchical aquaculture wastewater treatment device according to claim 4, characterized in that: The filter material inlet pipe (73) penetrates the side wall of the cylindrical body (11) from the top of the corresponding filter chamber; the filter material outlet pipe (74) penetrates the side wall of the cylindrical body (11) from the bottom of the corresponding filter chamber.

6. A hierarchical aquaculture wastewater treatment device according to claim 4, characterized in that: The spiral stirring rods (6) in the first filter chamber (21), the second filter chamber (22), the third filter chamber (23), the fourth filter chamber (24) and the fifth filter chamber (25) are all arranged on the same driving shaft (62) driven by a motor (61), and the motor (61) is arranged on the cover plate (12); the axis of the driving shaft (62) coincides with the axis of the cylindrical body (11), and the driving shaft (62) rotates through each filter chamber.

7. A hierarchical aquaculture wastewater treatment device according to claim 6, characterized in that: The rod body of the spiral stirring rod (6) is arranged obliquely relative to the axis of the cylindrical body (11), the middle part is fixed to the driving shaft (62), one end extends to the edge of the upper partition (71), and the other end extends to the edge of the lower partition (72).

8. A hierarchical aquaculture wastewater treatment device according to claim 1, characterized in that: It also comprises a water storage structure (4), wherein the water storage structure (4) is connected to the clean water inlet (32) via a pipeline.

9. A hierarchical aquaculture wastewater treatment device according to claim 1, characterized in that: The particle size of the quartz sand filter material is 0.5-1.0 mm; the particle size of the straw particles in the straw particle and biochar mixed filter material is 2-3 mm, and the particle size of the biochar is 1.0-1.5 mm; the particle size of the fiber ball filter material is 30-40 mm.

10. A hierarchical aquaculture wastewater treatment device according to claim 1, characterized in that: It also includes a filter material regeneration device, which is used for regenerating a filter material mixed with straw particles and biochar, and includes a nitric acid tank, a flushing tank and a drying chamber.

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