Freshwater aquaculture sewage treatment and reuse system

Abstract

The invention provides a freshwater aquaculture sewage treatment and reuse system, and relates to the technical field of sewage treatment. The freshwater aquaculture sewage treatment and reuse system comprises a bottom plate, a box body is fixedly connected to the upper end face of the bottom plate, a top plate is arranged on the upper end face of the box body, two second partition plates are arranged in the box body at equal intervals, and a screening structure is arranged at the position, close to the rear side, in the box body. By arranging the screening structure, when the sewage treatment device is used, sewage to be treated is conveyed into the box body along the water inlet pipe, the sewage is firstly subjected to preliminary filtration treatment through a grid, and then dirt attached to the grid is vibrated and shaken off through rotating and knocking cooperation of a first motor, a rotating disc and a plurality of knocking hammers; and meanwhile, under the cooperation of two torsional springs and two springs, the angle of the grille can be changed in the knocking process, and therefore dirt can be more conveniently shaken off.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a freshwater aquaculture sewage treatment and reuse system. Background Art

[0002] As an important part of the agricultural economy, freshwater aquaculture plays a key role in food supply and economic development worldwide. However, with the continuous expansion of aquaculture scale and the increasing degree of intensiveness, the large amount of wastewater generated in the freshwater aquaculture process has become a problem that needs to be solved urgently. These aquaculture wastewaters mainly come from fish excrement, residual feed and chemicals used in the aquaculture process, and contain high concentrations of organic matter, ammonia nitrogen, phosphorus, suspended solids, pathogens and other pollutants.

[0003] If discharged directly without effective treatment, these sewage will cause serious pollution to the surrounding water environment, leading to eutrophication of water bodies, destroying the balance of aquatic ecosystems, and even causing problems such as black and smelly water and a decline in biodiversity. In addition, with the increasing scarcity of global freshwater resources, how to efficiently utilize and recycle limited water resources has become a key challenge for the sustainable development of freshwater aquaculture.

[0004] Traditional sewage treatment methods, such as physical sedimentation, biological treatment and chemical treatment, can purify sewage to a certain extent, but have problems such as low treatment efficiency, high operating costs and secondary pollution. It is difficult to meet the needs of modern freshwater aquaculture for sewage treatment and reuse. Therefore, technicians in this field provide a freshwater aquaculture sewage treatment and reuse system to solve the problems raised in the above background technology. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a freshwater aquaculture wastewater treatment and reuse system, which solves the problems of low treatment efficiency, high operating cost and easy secondary pollution in the existing treatment methods.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A freshwater aquaculture wastewater treatment and reuse system, comprising a bottom plate, a box body is fixedly connected to the upper end surface of the bottom plate, a top plate is arranged on the upper end surface of the box body, two second partition plates are equidistantly arranged inside the box body, and a screening structure is arranged at the rear side of the inside of the box body;

[0009] The screening structure includes a first partition plate, the front and rear ends of the first partition plate are respectively fixedly connected to the rear side wall of the second partition plate on the rear side and the center of the rear inner wall of the box body, the upper end surface of the first partition plate is respectively fixedly connected with springs at both sides, a grille is provided at the rear side of the center of an inner wall of the box body near the first partition plate, the front and rear side walls of the grille are respectively fixedly connected with connecting rods at the edge of one side, the side walls of the two connecting rods are respectively sleeved with torsion springs, the other ends of the two connecting rods are respectively rotatably connected to the rear side wall of the second partition plate on the rear side and the rear inner wall of the box body, and the two torsion springs The two ends are respectively fixedly connected to the two side walls of the grille and the rear side wall of the second partition plate on the rear side and the rear inner wall of the box body, a first motor is fixedly connected to the upper end of the center of one side wall of the first partition plate at the lower end of the grille, a rotating disk is fixedly connected to the output end of the first motor, and a plurality of hammers are arranged in a circular array on the side wall of the rotating disk, a sludge dryer is arranged inside the box body on the other side of the first partition plate, a movable door is arranged on an inner side wall of the box body close to the sludge dryer, an exhaust pipe is arranged at the diagonal position of the upper end of the center of the front side wall of the box body, and the front end of the exhaust pipe passes through the rear side wall of the box body and leads to the interior;

[0010] A delivery structure is arranged at the center of the upper end surface of the top plate near one side edge, a filtering structure is arranged between the two second partition plates inside the box body at the lower end of the top plate, and a purification structure is arranged between the front side of the second partition plate and the front inner wall of the box body.

[0011] Preferably, the delivery structure includes a storage box, the lower end of which is fixedly connected to the upper end surface of the top plate, a delivery port is provided at the rear side of the center of the upper end surface of the storage box, an inclined plate is provided inside the storage box, the side walls of the inclined plate are fixedly connected to the lower ends of the centers of the two inner side walls of the storage box, an electric telescopic device is fixedly connected at the center of the lower inner wall of the storage box, a block is fixedly connected to the output end of the electric telescopic device, delivery holes are respectively provided at the front edge of the center of the upper end surface of the inclined plate and at the front edge of the center of the lower inner wall of the storage box, the positions of the two delivery holes correspond to each other up and down, and the lower end of the delivery hole on the lower inner wall of the storage box also passes through the upper end surface of the top plate and reaches the interior of the box body.

[0012] Preferably, the filtering structure includes a connecting plate, one end of the connecting plate passes through a side wall of the box and leads to the interior of the box, and the side wall is respectively fixedly connected with a first filter layer, a second filter layer, a third filter layer and a fourth filter layer, the first filter layer is arranged at an upper end of the second filter layer, the second filter layer is arranged at an upper end of the third filter layer, the third filter layer is arranged at an upper end of the fourth filter layer, and a cross plate is arranged inside the box at the lower end of the fourth filter layer, the front and rear ends of the cross plate are respectively fixedly connected to the side walls of the two second partition plates, a second motor is fixedly connected at the center of the lower inner wall of the box at the lower end of the cross plate, the output end of the second motor passes through the lower end surface of the cross plate and leads to the upper end, and a stirring blade is fixedly connected to the end, and a first discharge pipe is passed through the center of one side wall of the box near the lower end.

[0013] Preferably, the purification structure includes an adsorption plate, and limiting plates are fixedly connected to the front inner wall of the box body at the lower end of the adsorption plate and the front side wall of the second partition plate on the front side, respectively. The two sides of the lower end of the adsorption plate are respectively placed on the upper ends of the two limiting plates, and ultraviolet sterilization lamps are fixedly connected to the front inner wall of the box body at the upper end of the adsorption plate, the two inner walls and the front side wall of the second partition plate on the front side, respectively. A second discharge pipe is provided through the diagonal lower end of the center of one side wall of the box body on the front side.

[0014] Preferably, self-locking universal wheels are fixedly connected to the center of the lower end surface of the base plate at four diagonal positions, and a handle is fixedly connected to the front side wall of the base plate.

[0015] Preferably, the filtering structure is connected to the purification structure and the screening structure through a first delivery pump and a second delivery pump, respectively. The input and output ends of the first delivery pump respectively penetrate the upper end surface of the top plate and respectively lead to the interior of the filtering structure and the purification structure, and the output and input ends of the second delivery pump respectively penetrate the upper end surface of the top plate and respectively lead to the interior of the filtering structure and the screening structure.

[0016] Preferably, a water inlet pipe is provided through the center of the upper end surface of the top plate near the rear diagonal, and the center of the upper end surface of the top plate near the four diagonals is fixedly connected with a hanging ring, and observation windows are provided at the center of the upper end surface of the top plate at the upper end of the filtering structure and the purification structure.

[0017] Preferably, a control panel is provided at a front diagonal center of one side wall of the box body, and a reinforcing rib is fixedly connected to the side wall of the box body.

[0018] (III) Beneficial effects

[0019] The present invention provides a freshwater aquaculture wastewater treatment and reuse system. It has the following beneficial effects:

[0020] 1. In the present invention, a screening structure is provided. When in use, the sewage to be treated is transmitted to the interior of the box along the water inlet pipe, and the sewage is firstly filtered through the grille. Then, the first motor, the rotating disk and a plurality of hammers are rotated and knocked together to vibrate and shake off the dirt attached to the grille. At the same time, with the cooperation of two torsion springs and two springs, the angle of the grille changes during the knocking process, so that it is easier to shake off the dirt. The dirt after being shaken off is uniformly collected inside the sludge dryer and dried. After drying, the internal sludge can be cleaned by opening the movable door.

[0021] 2. In the present invention, by setting a delivery structure, anaerobic microorganisms are delivered into the storage box during use, and then the anaerobic microorganisms are uniformly concentrated on one side of the storage box under the tilting action of the tilting plate. The electric telescopic device is controlled to drive the block to extend and retract forward and backward, thereby adjusting the opening and closing of the two delivery holes, so that automatic delivery can be achieved and manual operation is convenient.

[0022] 3. In the present invention, by setting up a filtering structure, the filtered sewage is delivered to the position of the filtering structure by the second delivery pump during use, and the internal sewage is stirred by placing anaerobic microorganisms inside and cooperating with the rotation of the second motor and the stirring blades, and then filtered and processed layer by layer by the cooperation of the first filter layer, the second filter layer, the third filter layer and the fourth filter layer, so that the internal suspended matter, bacteria and organic matter can be removed to the greatest extent. After a period of use, the connecting plate can be pulled out from the inside of the box to clean the inside.

[0023] 4. In the present invention, by setting up a purification structure, the filtered sewage is delivered to the position of the purification structure by the first delivery pump when in use, and the harmful substances inside are adsorbed again under the action of the adsorption plate, and at the same time, it is sterilized and disinfected with an ultraviolet sterilization lamp to ensure that the internal wastewater meets the recycling standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric diagram of the overall structure of the present invention;

[0025] Figure 2 It is an axonometric view of the box in the present invention;

[0026] Figure 3 It is a front cross-sectional view of the box body in the present invention;

[0027] Figure 4 is an axonometric view of the grille in the present invention;

[0028] Figure 5 It is a cross-sectional view of the delivery structure in the present invention.

[0029] Among them, 1. box body; 2. bottom plate; 3. screening structure; 301. water inlet pipe; 302. exhaust pipe; 303. movable door; 304. sludge dryer; 305. grille; 306. first partition plate; 307. spring; 308. rotating disk; 309. first motor; 310. percussion hammer; 311. torsion spring; 312. connecting rod; 4. lifting ring; 5. top plate; 6. observation window; 7. first delivery pump; 8. handle; 9. control panel; 10. delivery structure; 1001. storage box; 1002. tilting plate; 1003. electric telescopic device; 1004. delivery hole; 1005. Block; 1006. Delivery port; 11. Second delivery pump; 12. Reinforcing ribs; 13. Second partition plate; 14. Filter structure; 1401. First discharge pipe; 1402. Connecting plate; 1403. First filter layer; 1404. Second filter layer; 1405. Third filter layer; 1406. Fourth filter layer; 1407. Stirring blades; 1408. Second motor; 1409. Transverse plate; 15. Purification structure; 1501. Ultraviolet sterilization lamp; 1502. Second discharge pipe; 1503. Adsorption plate; 1504. Restriction plate; 16. Self-locking universal wheel. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1-5 As shown, the embodiment of the present invention provides a freshwater aquaculture wastewater treatment and reuse system, comprising a bottom plate 2, a box body 1 is fixedly connected to the upper end surface of the bottom plate 2, a top plate 5 is arranged on the upper end surface of the box body 1, two second partition plates 13 are equidistantly arranged inside the box body 1, and a screening structure 3 is arranged at the rear side of the inside of the box body 1;

[0033] The screening structure 3 includes a first partition plate 306, the front and rear ends of which are respectively fixedly connected to the rear side wall of the second partition plate 13 and the center of the rear inner wall of the box body 1, and the upper end surface of the first partition plate 306 is respectively fixedly connected with springs 307 at both sides of the middle and west sides, and a grille 305 is provided at the rear side of the center of an inner wall of the box body 1 near the first partition plate 306, and the center of the front and rear side walls of the grille 305 is respectively fixedly connected with connecting rods 312 at one side edge, and the side walls of the two connecting rods 312 are respectively fixedly connected with springs 307 at both sides of the middle and west sides of the upper end surface of the first partition plate 306. A torsion spring 311 is sleeved, and the other ends of the two connecting rods 312 are rotatably connected to the rear side wall of the second partition plate 13 on the rear side and the rear inner wall of the box body 1. The two ends of the two torsion springs 311 are fixedly connected to the two side walls of the grille 305 and the rear side wall of the second partition plate 13 on the rear side and the rear inner wall of the box body 1. A first motor 309 is fixedly connected to the center of one side wall of the first partition plate 306 at the lower end of the grille 305 near the upper end, and a rotating disk 308 is fixedly connected to the output end of the first motor 309. The side of the rotating disk 308 There are multiple hammers 310 arranged in a circular array on the wall. A sludge dryer 304 is arranged inside the box body 1 on the other side of the first partition plate 306. A movable door 303 is arranged on an inner wall of the box body 1 near the sludge dryer 304. An exhaust pipe 302 is arranged at the center of the front side wall of the box body 1 near the upper end diagonal. The front end of the exhaust pipe 302 passes through the rear side wall of the box body 1 and leads to the interior. When in use, the sewage to be treated is transmitted to the interior of the box body 1 along the water inlet pipe 301, and the sewage is first preliminarily filtered through the grille 305. The first motor 309, the rotating disk 308 and the plurality of hammers 310 are then used to rotate and strike the dirt attached to the grille 305, and the two torsion springs 311 and the two springs 307 cooperate to change the angle of the grille 305 during the striking process, so that the dirt can be shaken off more easily. The dirt after being shaken off is uniformly collected inside the sludge dryer 304 for drying. After drying, the sludge inside can be cleaned by opening the movable door 303.

[0034] A delivery structure 10 is arranged at the center of the upper end surface of the top plate 5 near one side edge, a filtering structure 14 is arranged between the two second partition plates 13 inside the box body 1 at the lower end of the top plate 5, and a purification structure 15 is arranged between the front side of the second partition plate 13 and the front inner wall of the box body 1.

[0035] The delivery structure 10 includes a storage box 1001, the lower end of the storage box 1001 is fixedly connected to the upper end surface of the top plate 5, a delivery port 1006 is arranged at the rear side of the center of the upper end surface of the storage box 1001, an inclined plate 1002 is arranged inside the storage box 1001, the side wall of the inclined plate 1002 is fixedly connected to the center of the two inner side walls of the storage box 1001 near the lower end, an electric telescopic device 1003 is fixedly connected to the center of the lower inner wall of the storage box 1001, a stopper 1005 is fixedly connected to the output end of the electric telescopic device 1003, the upper end surface center of the inclined plate 1002 near the front edge and the lower inner wall of the storage box 1001 A delivery hole 1004 is provided at the front edge of the center, and the positions of the two delivery holes 1004 correspond to each other. The lower end of the delivery hole 1004 on the lower inner wall of the storage box 1001 also penetrates the upper end surface of the top plate 5 and passes into the interior of the box body 1. When in use, anaerobic microorganisms are delivered into the interior of the storage box 1001, and then the anaerobic microorganisms are uniformly concentrated on one side of the interior of the storage box 1001 under the tilting action of the tilting plate 1002. The electric telescopic device 1003 is controlled to drive the block 1005 to extend and retract forward and backward, thereby adjusting the opening and closing of the two delivery holes 1004, which can realize automatic delivery and facilitate manual operation.

[0036] The filtering structure 14 includes a connecting plate 1402, one end of which passes through a side wall of the box body 1 and leads to the interior of the box body 1, and the side wall is respectively fixedly connected with a first filter layer 1403, a second filter layer 1404, a third filter layer 1405 and a fourth filter layer 1406, the materials of the first filter layer 1403, the second filter layer 1404, the third filter layer 1405 and the fourth filter layer 1406 are chemical fiber, metal, ceramic and reverse osmosis membrane filter element respectively, the first filter layer 1403 is arranged at the upper end of the second filter layer 1404, the second filter layer 1404 is arranged at the upper end of the third filter layer 1405, the third filter layer 1405 is arranged at the upper end of the fourth filter layer 1406, and a horizontal plate 1409 is arranged inside the box body 1 at the lower end of the fourth filter layer 1406, and the front and rear ends of the horizontal plate 1409 are respectively fixedly connected to the side walls of the two second partition plates 13, and are located below the horizontal plate 1409. A second motor 1408 is fixedly connected to the center of the lower inner wall of the end box body 1, and the output end of the second motor 1408 passes through the lower end surface of the horizontal plate 1409 and passes to the upper end, and a stirring blade 1407 is fixedly connected to the end. A first discharge pipe 1401 is penetrated at the center of the lower end of one side wall of the box body 1. When in use, the filtered sewage is delivered to the position of the filter structure 14 by the second delivery pump 11, and the internal sewage is stirred by placing anaerobic microorganisms and cooperating with the rotation of the second motor 1408 and the stirring blade 1407. Then, it is filtered and processed layer by layer with the cooperation of the first filter layer 1403, the second filter layer 1404, the third filter layer 1405 and the fourth filter layer 1406, which can remove the internal suspended matter, bacteria and organic matter to the greatest extent. After a period of use, the connecting plate 1402 can be pulled out from the inside of the box body 1 to clean the inside.

[0037] The purification structure 15 includes an adsorption plate 1503, which is made of activated carbon. Restriction plates 1504 are fixedly connected to the front inner wall of the box body 1 at the lower end of the adsorption plate 1503 and the front side wall of the second partition plate 13 on the front side, respectively. The two sides of the lower end of the adsorption plate 1503 are respectively placed on the upper ends of the two restriction plates 1504. Ultraviolet sterilization lamps 1501 are fixedly connected to the front inner wall of the box body 1 at the upper end of the adsorption plate 1503, the two inner walls and the front side wall of the second partition plate 13 on the front side, respectively. A second discharge pipe 1502 is penetrated at the diagonal point of the lower end of the center of one side wall of the box body 1 on the front side. When in use, the filtered sewage is transported to the position of the purification structure 15 by the first delivery pump 7, and the harmful substances inside are adsorbed again under the action of the adsorption plate 1503, and at the same time, they are sterilized and disinfected in cooperation with the ultraviolet sterilization lamp 1501 to ensure that the internal wastewater meets the recycling standards.

[0038] Self-locking universal wheels 16 are fixedly connected to the center of the lower end surface of the base plate 2 near four diagonals, and a handle 8 is fixedly connected to the front side wall of the base plate 2.

[0039] The filtering structure 14 is connected to the purification structure 15 and the screening structure 3 through the first delivery pump 7 and the second delivery pump 11 respectively. The input and output ends of the first delivery pump 7 respectively penetrate the upper end surface of the top plate 5 and are respectively connected to the interior of the filtering structure 14 and the purification structure 15. The output and input ends of the second delivery pump 11 respectively penetrate the upper end surface of the top plate 5 and are respectively connected to the interior of the filtering structure 14 and the screening structure 3.

[0040] A water inlet pipe 301 is provided through the center of the upper end surface of the top plate 5 near the rear diagonal, and the center of the upper end surface of the top plate 5 near the four diagonals is fixedly connected with a hanging ring 4, and an observation window 6 is provided at the center of the upper end surface of the top plate 5 at the upper end of the filtering structure 14 and the purification structure 15.

[0041] A control panel 9 is provided at a front diagonal position at the center of one side wall of the box body 1 , and a reinforcing rib 12 is fixedly connected to the side wall of the box body 1 .

[0042] Working principle: The present application is a freshwater aquaculture wastewater treatment and reuse system. When in use, the wastewater to be treated is transmitted to the interior of the box body 1 along the water inlet pipe 301, and the wastewater is firstly filtered through the grille 305, and then the first motor 309, the rotating disk 308 and the plurality of hammers 310 are rotated and knocked together to vibrate and shake off the dirt attached to the grille 305. At the same time, with the cooperation of the two torsion springs 311 and the two springs 307, the angle of the grille 305 changes during the knocking process, so that it is easier to shake off the dirt. The dirt after being shaken off is uniformly collected in the interior of the sludge dryer 304 for drying. After drying, the internal sludge can be cleaned by opening the movable door 303.

[0043] Then, the anaerobic microorganisms are placed inside the storage box 1001. Then, under the tilting action of the tilting plate 1002, the anaerobic microorganisms are uniformly concentrated on one side inside the storage box 1001. By controlling the electric telescopic device 1003 to drive the block 1005 to extend and retract forward and backward, the opening and closing of the two placement holes 1004 are adjusted, and automatic placement can be achieved, which is convenient for manual operation.

[0044] The filtered sewage is delivered to the position of the filter structure 14 by the second delivery pump 11, and the sewage inside is stirred by placing anaerobic microorganisms inside and cooperating with the rotation of the second motor 1408 and the stirring blade 1407. Then, it is filtered and processed layer by layer by the cooperation of the first filter layer 1403, the second filter layer 1404, the third filter layer 1405 and the fourth filter layer 1406, which can remove the suspended matter, bacteria and organic matter inside to the greatest extent. After a period of use, the connection plate 1402 can be pulled out from the inside of the box body 1 to clean the inside;

[0045] Finally, the filtered sewage is delivered to the purification structure 15 by the first delivery pump 7, and the harmful substances inside are adsorbed again by the adsorption plate 1503, and sterilized and disinfected by the ultraviolet sterilization lamp 1501 to ensure that the internal wastewater meets the recycling standards.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A freshwater aquaculture wastewater treatment and reuse system, comprising a bottom plate (2), characterized in that: The upper end surface of the bottom plate (2) is fixedly connected to a box body (1), the upper end surface of the box body (1) is provided with a top plate (5), two second partition plates (13) are equidistantly arranged inside the box body (1), and a screening structure (3) is arranged at the rear side of the inside of the box body (1); The screening structure (3) comprises a first partition plate (306), the front and rear ends of the first partition plate (306) are respectively fixedly connected to the rear side wall of the second partition plate (13) on the rear side and the center of the rear inner wall of the box body (1), the upper end surface of the first partition plate (306) is respectively fixedly connected to springs (307) at the west and both sides, a grille (305) is provided at the rear side of the center of an inner wall of the box body (1) close to the first partition plate (306), the front and rear side walls of the grille (305) are respectively fixedly connected to the center of one side edge, the side walls of the two connecting rods (312) are respectively sleeved with torsion springs (311), the other ends of the two connecting rods (312) are respectively rotatably connected to the rear side wall of the second partition plate (13) on the rear side and the rear inner wall of the box body (1), the two ends of the two torsion springs (311) are respectively Fixedly connected to the two side walls of the grille (305) and the rear side wall of the second partition plate (13) on the rear side and the rear inner side wall of the box body (1), a first motor (309) is fixedly connected to the center of one side wall of the first partition plate (306) at the lower end of the grille (305) near the upper end, a rotating disk (308) is fixedly connected to the output end of the first motor (309), a plurality of hammers (310) are arranged in a circular array on the side wall of the rotating disk (308), a sludge dryer (304) is arranged inside the box body (1) on the other side of the first partition plate (306), a movable door (303) is arranged on an inner side wall of the box body (1) on the side close to the sludge dryer (304), an exhaust pipe (302) is arranged at the center of the front side wall of the box body (1) near the upper end diagonal, and the front end of the exhaust pipe (302) passes through the rear side wall of the box body (1) and leads to the interior; A delivery structure (10) is provided at the center of the upper end surface of the top plate (5) near one side edge, a filtering structure (14) is provided between two second partition plates (13) located inside the box body (1) at the lower end of the top plate (5), and a purification structure (15) is provided between the front side of the second partition plate (13) and the front inner wall of the box body (1) near the front side.

2. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: The delivery structure (10) comprises a storage box (1001), the lower end of the storage box (1001) is fixedly connected to the upper end surface of the top plate (5), a delivery port (1006) is arranged at the rear side of the center of the upper end surface of the storage box (1001), an inclined plate (1002) is arranged inside the storage box (1001), the side walls of the inclined plate (1002) are fixedly connected to the lower ends of the centers of the two inner side walls of the storage box (1001), and an electric plug is fixedly connected at the center of the lower inner wall of the storage box (1001). A motorized telescopic device (1003) is provided, wherein the output end of the motorized telescopic device (1003) is fixedly connected to a stopper (1005), and a delivery hole (1004) is provided at the front edge of the center of the upper end surface of the inclined plate (1002) and at the front edge of the center of the lower inner wall of the storage box (1001), respectively. The positions of the two delivery holes (1004) correspond to each other up and down, and the lower end of the delivery hole (1004) on the lower inner wall of the storage box (1001) also penetrates the upper end surface of the top plate (5) and leads to the interior of the box body (1).

3. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: The filtering structure (14) comprises a connecting plate (1402), one end of which passes through a side wall of the box body (1) and leads to the interior of the box body (1), and a first filtering layer (1403), a second filtering layer (1404), a third filtering layer (1405) and a fourth filtering layer (1406) are respectively fixedly connected to the side wall, the first filtering layer (1403) is arranged on the upper end of the second filtering layer (1404), the second filtering layer (1404) is arranged on the upper end of the third filtering layer (1405), and the third filtering layer (1405) is arranged on the upper end of the fourth filtering layer (1406). At the end, a horizontal plate (1409) is arranged inside the box body (1) at the lower end of the fourth filter layer (1406), and the front and rear ends of the horizontal plate (1409) are respectively fixedly connected to the side walls of the two second partition plates (13). A second motor (1408) is fixedly connected at the center of the lower inner wall of the box body (1) at the lower end of the horizontal plate (1409). The output end of the second motor (1408) passes through the lower end surface of the horizontal plate (1409) and passes to the upper end, and a stirring blade (1407) is fixedly connected to the end. A first discharge pipe (1401) is arranged to pass through the center of one side wall of the box body (1) near the lower end.

4. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: The purification structure (15) comprises an adsorption plate (1503), and limiting plates (1504) are fixedly connected to the front inner wall of the box body (1) at the lower end of the adsorption plate (1503) and the front side wall of the second partition plate (13) on the front side, respectively. Both sides of the lower end of the adsorption plate (1503) are respectively placed on the upper ends of the two limiting plates (1504), and ultraviolet sterilization lamps (1501) are fixedly connected to the front inner wall of the box body (1) at the upper end of the adsorption plate (1503), the two inner walls and the front side wall of the second partition plate (13) on the front side, respectively. A second discharge pipe (1502) is provided through the diagonal portion of the lower end of the center of one side wall of the box body (1) on the front side.

5. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: Self-locking universal wheels (16) are fixedly connected to the center of the lower end surface of the base plate (2) at four diagonal positions, and a handle (8) is fixedly connected to the front side wall of the base plate (2).

6. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: The filtering structure (14) is connected to the purification structure (15) and the screening structure (3) through a first delivery pump (7) and a second delivery pump (11), respectively; the input and output ends of the first delivery pump (7) respectively penetrate the upper end surface of the top plate (5) and are connected to the inside of the filtering structure (14) and the purification structure (15), respectively; the output and input ends of the second delivery pump (11) respectively penetrate the upper end surface of the top plate (5) and are connected to the inside of the filtering structure (14) and the screening structure (3), respectively.

7. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: A water inlet pipe (301) is provided through the center of the upper end surface of the top plate (5) at the rear diagonal part, and a suspension ring (4) is fixedly connected to the center of the upper end surface of the top plate (5) at four diagonal parts, and an observation window (6) is provided at the center of the upper end surface of the top plate (5) at the upper end of the filtering structure (14) and the purification structure (15).

8. A freshwater aquaculture wastewater treatment and reuse system according to claim 1, characterized in that: A control panel (9) is provided at a front diagonal position at the center of one side wall of the box body (1), and a reinforcing rib (12) is fixedly connected to the side wall of the box body (1).

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