Culture tail water ecological purification treatment system based on biological enhancement effect

Abstract

The invention discloses an aquaculture tail water ecological purification treatment system based on a biological enhancement effect, and belongs to the technical field of aquaculture tail water ecological management. A water level automatic adjustment sedimentation promoting tank is arranged in the middle of the interior of an annular ecological sedimentation tank; the inner ring of the annular ecological sedimentation tank is respectively provided with an ecological purification tank and an enhanced purification tank, the enhanced purification tank and the ecological purification tank are separated by a detachable ecological overflow weir, and the annular ecological sedimentation tank and the enhanced purification tank are separated by a hollow matrix filler wall with biological brushes; the annular ecological sedimentation tank is isolated from the ecological purification tank through a solid wall with biological brushes, the ecological purification tank is communicated with the ecological water outlet channel, an aeration pipe is arranged in the enhanced purification tank, and an MBBR filler net cage is erected on the aeration pipe. The treatment effect of the aquaculture tail water can be effectively improved, the effluent quality is improved, the energy consumption cost is reduced, and the problem that the treatment effect of low-temperature tail water in winter is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a breeding tail water ecological purification treatment system based on the biological reinforcement effect, belonging to the technical field of ecological management of aquaculture tail water. BACKGROUND

[0002] The pollution status of aquaculture tail water is severe. With the rapid development of aquaculture industry, the amount of tail water discharged is huge, about 60 billion cubic meters of tail water is produced in China every year. There are many reasons for pollution during the production process of aquaculture industry, such as too high breeding density, unscientific feeding method or too large feeding amount, improper use of drugs in the process of fishery production, etc., resulting in a large amount of organic matter, nitrogen, phosphorus and other nutrients and pathogenic microorganisms in the tail water. Due to the lack of mandatory discharge standards, there are phenomena of tail water stealing and over-discharge in some areas. At the same time, the infrastructure for tail water treatment is weak, and the supervision system is not perfect, resulting in a large amount of untreated tail water being directly discharged, causing serious pollution to the surrounding water bodies and affecting the survival of aquatic organisms and human health.

[0003] The treatment technology of aquaculture tail water mainly focuses on nitrogen reduction, phosphorus removal, suspended solids control and sterilization and disinfection. The commonly used technologies can be divided into four categories: physical, chemical, biological and ecological combined technologies. Physical technology: through facilities such as sedimentation tank and filter dam, the suspended solids such as leftover feed and feces in the tail water are removed by gravity settling or filter interception; membrane filtration technology can deeply purify, but the cost is high. Chemical technology: adding flocculants (such as polyaluminum chloride) to accelerate the sedimentation of particulate matter, and using oxidizing agents (such as chlorine dioxide) to kill bacteria, but the dosage needs to be strictly controlled to prevent secondary pollution. Biological technology: using microbial agents (such as Bacillus and photosynthetic bacteria) to decompose nitrogen and phosphorus organic matter in water; biological membrane method (such as biological filter and constructed wetland) continuously purifies water quality through microbial communities on the carrier, with ecological benefits. Ecological combined technology: connecting sedimentation tank + constructed wetland + aquatic plants (such as reed and water hyacinth), combined with fish and shellfish to form a three-dimensional purification system, which is low in cost and easy to maintain, and is the current mainstream treatment mode. For example, the "three-pool two-dam" treatment technology is a commonly used technical measure for treating aquaculture tail water.

[0004] However, the existing "three-pool two-dam" technology is widely used, but it still has problems such as insufficient regional adaptability and poor treatment effect caused by low temperature in winter. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the defects of the prior art, provide an aquaculture tail water ecological purification treatment system based on the biological reinforcement effect, which can effectively improve the treatment effect of aquaculture tail water, improve the water quality, reduce the energy consumption cost, and overcome the problem of poor treatment effect of tail water in winter.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] An ecological purification treatment system for aquaculture tail water based on biological enhancement effect, comprising a ring-shaped ecological sedimentation tank, two water level automatic adjustment and sedimentation promoting tanks are arranged in the middle of the ring-shaped ecological sedimentation tank to separate the tank into front and rear parts, the front part of the ring-shaped ecological sedimentation tank is communicated with an ecological water inlet channel, ecological purification tanks and enhanced purification tanks are arranged at the front and rear positions of the inner ring of the ring-shaped ecological sedimentation tank, the enhanced purification tank and the ecological purification tank are separated by a detachable ecological overflow weir, the detachable ecological overflow weir is located in front of the two water level automatic adjustment and sedimentation promoting tanks, the ring-shaped ecological sedimentation tank and the enhanced purification tank are isolated by a biofilm brush hollow substrate filler wall, the ring-shaped ecological sedimentation tank and the ecological purification tank are isolated by a biofilm brush solid wall, the ecological purification tank is communicated with an ecological water outlet channel, an aeration pipe is arranged in the enhanced purification tank, an MBBR filler net box is arranged on the aeration pipe, and an aerator is arranged outside the ring-shaped ecological sedimentation tank and connected with the aeration pipe.

[0008] The ecological water inlet channel is a multi-stage overflow ladder structure, water inlet side ditches are arranged on the two sides of the ecological water inlet channel in the longitudinal direction, overflow retaining walls are arranged on the ecological water inlet channel and inside the water inlet side ditches, collection sedimentation tanks are arranged at the ends of the water inlet side ditches, and a plurality of stages of ladder-shaped filtering and purification layers are arranged in the ecological water inlet channel and inside the overflow retaining walls.

[0009] A weight-adjustable automatic flap gate is arranged at the water inlet end of the water level automatic adjustment and sedimentation promoting tank, the gate of the weight-adjustable automatic flap gate is a multi-layer frame structure, the gate frame in the middle of the weight-adjustable automatic flap gate is installed through a rotating shaft, the gate frames on the two sides are inserted into weight blocks, the bottom of the middle main body structure of the water level automatic adjustment and sedimentation promoting tank is a sinking tank, and a substrate filler wall is arranged at the water outlet end of the water level automatic adjustment and sedimentation promoting tank.

[0010] The lower part of the detachable ecological overflow weir adopts a plain concrete solid wall, the upper part adopts a hollow structure, the outer side of the hollow structure is a gabion net frame, the gabion net frame is embedded with a detachable mixed filler module, and the detachable mixed filler module is composed of MBBR fillers and substrate fillers such as gravel at a volume ratio of 1:1.

[0011] The MBBR filler net box adopts a pull-out structure, the MBBR filler net box is installed with pull-out sliding rails at the bottom, the MBBR filler net box is installed with a solar cell panel at the upper part, MBBR filler modules are installed in the MBBR filler net box, and the MBBR filler modules are composed of MBBR fillers and low-temperature resistant microbial agent packages.

[0012] The low-temperature resistant microbial agent package is a porous slow-release transparent spherical structure, a carrier of the low-temperature resistant microbial agent package uses sodium alginate and diatomite as an embedding body, and a specific manufacturing method of the embedding body is as follows: sodium alginate and diatomite are uniformly mixed according to a mass ratio of 7:2, and 70-80 DEG C sterilized ultrapure water is added according to a preparation of 2.5% mass concentration; the composite microbial liquid used by the low-temperature resistant microbial agent package includes Pseudomonas stutzeri, Pseudomonas fragi and Pseudarthrobacter, the volume ratio of the composite microbial liquid addition amount to the microbial agent carrier is 1:9, and the composite microbial liquid concentration is greater than 1.5*10 8 CFU / mL.

[0013] The aeration pipe is provided with two gas outlet pipes, and the gas outlet pipes are arranged at an angle of 45 degrees with the vertical plane and obliquely downward.

[0014] The wall body of the epiphyte brush hollow matrix filler wall is externally provided with an epiphyte brush, and internally filled with a matrix filler, and the matrix filler includes gravel or volcanic rock.

[0015] The ecological effluent channel is provided with an activated carbon filter wall in the middle.

[0016] The annular ecological sedimentation tank and the enhanced purification tank are isolated by the epiphyte brush hollow matrix filler wall, the annular ecological sedimentation tank and the ecological purification tank are isolated by the epiphyte brush solid wall body, the enhanced purification tank is provided with an aeration pipe, the MBBR filler net box is arranged on the aeration pipe, the combination of the epiphyte brush, the matrix filler and the MBBR filler can effectively improve the treatment effect of the aquaculture tail water, improve the effluent water quality and reduce the energy consumption cost.

[0017] The use of the low-temperature resistant microbial agent can overcome the problem of poor effluent water quality effect under the influence of low temperature in winter and effectively improve the effluent water quality effect.

[0018] The design of the weight-adjustable automatic flap gate of the water level automatic regulation and sinking pool can realize the automatic regulation and control of water quantity and water level, save energy consumption, ensure the ecological water level of the front inlet channel and guarantee the growth of plants.

[0019] The setting of the aeration pipe gas outlet hole angle and the setting of the solar cell panel on the top of the MBBR net box can achieve the goals of preventing hole blockage and reducing energy consumption.

[0020] The present application can effectively solve the problem of affecting flood control and waterlogging prevention and reducing water purification effect caused by the filling material blockage of the overflow weir in the actual situation through the design of the detachable ecological overflow weir. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a schematic diagram of a breeding tail water ecological purification treatment system based on a biological enhancement effect in the present application;

[0022] Figure 2 Fig. 2 is a cross-sectional view and a top view of an ecological water inlet channel in the present application;

[0023] Figure 3 Fig. 3 is a structure diagram of a water level automatic regulation and sinking promoting pool in the present application;

[0024] Figure 4 Fig. 4 is a structure diagram of a detachable ecological overflow weir in the present application;

[0025] Figure 5 Fig. 5 is a structure diagram of an aeration pipe in the present application;

[0026] Figure 6 Fig. 6 is a structure diagram of an MBBR net cage in the present application;

[0027] Figure 7 Fig. 7 is a schematic diagram of an MBBR composite filler module in the present application;

[0028] Figure 8 Fig. 8 is a curve diagram of a low-temperature resistant microbial pollutant reduction efficiency in the present application;

[0029] The reference signs in the drawings are as follows: 1-ecological water inlet channel; 2-annular ecological sedimentation tank; 3-enhanced purification tank; 4-detachable ecological overflow weir; 5-ecological purification tank; 6-ecological water outlet channel; 7-water level automatic regulation and sinking promoting pool; 8-attached biological brush solid wall; 9-attached biological brush hollow substrate filler wall; 10-aeration pipe; 11-MBBR filler net cage; 12-aerator; 13-activated carbon filter wall; 14-inlet side ditch; 15-overflow retaining wall; 16-collecting sedimentation tank; 17-ladder-shaped filtration and purification layer; 18-planting soil layer; 19-gravel filler layer; 20-weight adjustable automatic flap gate; 21-rotation shaft; 22-sinking pool; 23-substrate filler wall; 24-plain concrete solid wall; 25-stone cage net frame; 26-detachable mixed filler module; 27-gas outlet pipe; 28-solar cell panel; 29-MBBR filler module; 30-MBBR filler; 31-low-temperature resistant microbial agent package. DETAILED DESCRIPTION

[0030] The present application will be further described below in combination with the drawings, and the following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0031] Example 1

[0032] This invention discloses an ecological purification and treatment system for aquaculture wastewater based on bioaugmentation effects, such as... Figure 1 As shown, the system includes an ecological inlet channel 1, a ring-shaped ecological sedimentation tank 2, an enhanced purification tank 3, a detachable ecological overflow weir 4, an ecological purification tank 5, and an ecological outlet channel 6. The ring-shaped ecological sedimentation tank 2 has two automatically regulating sedimentation tanks 7 that divide it into front and rear sections. The front of the ring-shaped ecological sedimentation tank 2 is connected to the ecological inlet channel 1. The ecological purification tank 5 and the enhanced purification tank 3 are located at the front and rear of the inner ring of the ring-shaped ecological sedimentation tank 2, respectively, and are separated from the ecological purification tank 5 by the detachable ecological overflow weir 4. The detachable ecological overflow weir 4 is located in front of the two automatically regulating sedimentation tanks 7. The ring-shaped ecological sedimentation tank 2 and the enhanced purification tank 3 are separated by a perforated substrate filler wall 9 with attached biological brushes, and the ring-shaped ecological sedimentation tank 2 and the ecological purification tank 5 are separated by a solid wall 8 with attached biological brushes. The solid wall 8 with attached biological brushes and the perforated substrate filler wall 9 with attached biological brushes are separated by the detachable ecological overflow weir 4. The exterior of the perforated substrate filler wall 9 with biological brushes is made of biological brushes, while the interior is filled with substrate fillers such as gravel and volcanic rock, providing attachment sites for microorganisms both inside and out. The ecological purification tank 5 is connected to the ecological effluent channel 6. The enhanced purification tank 3 is equipped with an aeration pipe 10, on which an MBBR filler mesh box 11 is mounted. The aeration pipe 10 is connected to an aerator 12 located outside the annular ecological sedimentation tank 2.

[0033] The working process of this invention is as follows: After the water flows through the ecological inlet channel 1 into the annular ecological sedimentation tank 2, it cannot flow into the ecological purification tank 5 before the water level automatically regulating sedimentation tank 7 due to the presence of a solid wall 8 with attached biological brushes. After passing through the water level automatically regulating sedimentation tank 7, the water flows into the rear end of the annular ecological sedimentation tank 2. This rear end area is isolated from the enhanced purification tank 3 by a perforated substrate filler wall 9 with attached biological brushes. After the water flows into this area, it will be purified and then seep into the enhanced purification tank 3. The enhanced purification tank is equipped with aeration pipes and MBBR mesh cages, which can achieve biological enhanced purification of the water in this area. The water purified in the enhanced purification tank 3 can be further purified by a detachable ecological infiltration weir 4 and then seep into the rear ecological purification tank 5. The ecological purification effect of aquatic plants can further remove pollutants. Finally, the effluent flows into the ecological outlet channel 6 through a connecting pipe, and is finally purified by the activated carbon filter wall in the ecological outlet channel 6 before being discharged.

[0034] This invention utilizes a combination of biological brushes, substrate fillers, and MBBR fillers to effectively improve the treatment of aquaculture wastewater, enhance effluent quality, and reduce energy costs in the inlet channel, annular ecological sedimentation tank, enhanced purification tank, and detachable ecological overflow weir.

[0035] Example 2

[0036] This embodiment is a further improvement upon embodiment 1. For example... Figure 1 As shown, an activated carbon filter wall 13 is installed in the middle of the ecological water outlet channel 6 to further remove pollutants and odors from the water. Figure 2 As shown, the ecological inlet channel 1 has a multi-stage overflow terraced structure. Inlet side ditches 14 are longitudinally arranged on both sides of the ecological inlet channel 1, and an overflow retaining wall 15 is installed on the ecological inlet channel 1 and inside the inlet side ditches 14. Water enters the channel from the inlet side ditches 14 and flows longitudinally. After reaching a certain height, the water flows into the channel from the overflow retaining wall 15. A collection and sedimentation tank 16 is installed at the end of the inlet side ditches 14 to remove intercepted garbage, large particulate matter, and other pollutants. Wastewater passes through the overflow retaining wall 15 and is purified by a three-stage terraced filtration and purification layer 17 before flowing into the annular ecological sedimentation tank 2. The upper and lower parts of the terraced filtration and purification layer 17 are a planting soil layer 18 and a gravel filler layer 19, respectively. Economic crops are planted on the planting soil layer 18.

[0037] like Figure 3 As shown, the inlet of the automatic water level regulating sedimentation tank 7 is equipped with a weight-adjustable automatic flap gate 20. The gate has a multi-layer frame structure, with the middle gate frame fixedly installed to the rotating shaft 21. Weight blocks of specified dimensions can be inserted into the gate frames on both sides as needed, adjusting the water level depth of the front-end water body to ensure the water required for the growth of aquatic plants in the front-end ecological inlet channel. When the water pressure reaches a certain value, the flap gate starts counterclockwise to allow water to enter. The bottom of the main structure of the automatic water level regulating sedimentation tank 7 is a sedimentation tank 22 structure, with sufficient depth to allow suspended matter to settle. The outlet is equipped with a matrix filler wall 23, which can reduce flow velocity, provide water purification, and ensure large-volume overflow.

[0038] like Figure 4 As shown, the lower part of the detachable ecological overflow weir 4 uses a solid plain concrete wall 24. This structure can regulate a certain water level, and its height can be set according to the normal water level of rivers and ponds in different regions. The upper part adopts a hollow structure, with a gabion mesh frame 25 on the outside. Detachable mixed filler modules 26 can be embedded in the gabion mesh frame 25. The detachable mixed filler modules 26 are made of MBBR filler and gravel and other matrix fillers mixed in a 1:1 volume ratio. This design can reduce the weight of the upper wall. If the mixed filler in the upper structure is severely blocked and affects flood discharge, it can be removed and cleaned in layers and batches without affecting drainage or filtration and purification.

[0039] like Figure 5 As shown, the aeration pipe is equipped with two rows of air outlet pipes 34. The air outlet pipe 27 is set at a 45° angle downwards to the vertical plane, which can effectively prevent pipe blockage and ensure stable aeration.

[0040] likeFigure 6 As shown, the MBBR filler net cage 11 adopts a "pulling type" structure, and a pulling slide rail 27 is installed at the bottom of the net cage, which can be pulled from the side for filler replacement. A solar cell panel 28 is installed at the upper part of the MBBR filler net cage 11, and the solar cell panel 28 generates electricity for the use of the aerator 12. The MBBR filler net cage 11 is internally installed with an MBBR composite filler module 29.

[0041] As shown in the figure, Figure 7 As shown, the MBBR composite filler module 29 is composed of MBBR filler 30 mixed with low-temperature resistant microbial agent package 31. The agent package is filled with low-temperature resistant microbial agent 32. The agent is a porous slow-release transparent spherical structure. The agent carrier uses sodium alginate and diatomite as embedding bodies, uniformly mixes sodium alginate and diatomite in a weight ratio of 7:2, and adds sterile ultrapure water with a temperature of about 70-80°C at a preparation mass concentration of 2.5% to prepare a corresponding mixed solution to obtain a microbial agent carrier. The agent carrier uses sodium alginate and diatomite as embedding bodies, uniformly mixes sodium alginate and diatomite in a ratio of 7:2, and adds sterile ultrapure water with a temperature of about 70-80°C at a preparation concentration of 2.5% to prepare a corresponding mixed solution to obtain a microbial agent carrier. The composite microbial liquid used by the agent includes Pseudomonas stutzeri, Pseudomonas fragi, and Pseudarthrobacter, and the concentration of the bacterial liquid is greater than 1.5x10 8 CFU / mL. The volume ratio of the added amount of composite bacterial liquid to the microbial agent carrier is 1:9, the prepared microbial agent carrier is mixed with the composite microbial liquid, and the mixed solution is dropped into 0.85% calcium chloride solution to form the immobilized microspheres of the porous slow-release transparent spherical structure.

[0042] As shown in the figure, Figure 8As shown, the present application carries out the pollutant degradation effect simulation culture test of microbial inoculant in low temperature environment. One beaker is the test group and the other is the control group. The low temperature resistant microbial mixed liquid is added to the test group. All test conditions are consistent except the microbial liquid. MBBR filler is added. The influent ammonia nitrogen is 17mg / L, the influent COD is 120mg / L, the room temperature is controlled at 5℃, and the aeration amount is kept at 1L / min. Research shows that the COD degradation efficiency in the beaker with the addition of the microbial liquid is improved by 2%~6% within 8 days, and the leading position is maintained stably. The ammonia nitrogen degradation efficiency of the ammonia nitrogen group is improved by 3%~6% compared with the control group within 3~6 days, and the leading advantage is gradually weakened after 6 days. The mixed microbial liquid of the present application promotes the removal of COD and ammonia nitrogen to a certain extent under low temperature conditions, and improves the pollutant degradation efficiency. Therefore, the present application considers maintaining the degradation efficiency, and adopts the slow-release microbial agent form, so as to increase the time for the microbial liquid to play a role in pollutant degradation and improve the degradation efficiency.

[0043] Through the description of the embodiments of the present application, it can be known that the present application provides a breeding tail water ecological purification treatment system based on biological strengthening effect. The present application effectively improves the tail water purification effect through the combination use of biological brush, substrate filler and MBBR filler in the influent channel, annular ecological sedimentation tank, enhanced purification tank and detachable ecological overflow weir. Through the use of low temperature resistant microbial inoculant, the problem of poor effluent water quality effect under the influence of winter low temperature is overcome, and the effluent water quality effect is effectively improved. Through the design of the weight-adjustable automatic flap gate of the sedimentation tank promoted by water level automatic adjustment, the automatic regulation and control of water quantity and water level can be realized, which not only saves energy consumption, but also ensures the ecological water level of the front influent channel and guarantees the growth of plants. Through the setting of the gas outlet hole angle of the aeration pipe and the setting of the solar cell panel at the top of the MBBR net cage, the goals of preventing hole blockage and reducing energy consumption can be achieved. Through the design of the detachable ecological overflow weir, the problem of affecting flood control and waterlogging prevention and reducing water quality purification effect caused by the blockage of the overflow weir filler in the actual situation can be effectively solved.

[0044] The above is only the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An ecological purification and treatment system for aquaculture wastewater based on bioaugmentation effect, characterized in that: The system includes a ring-shaped ecological sedimentation tank (2), which has two automatically adjustable sedimentation tanks (7) that divide it into front and rear sections. The front of the ring-shaped ecological sedimentation tank (2) is connected to an ecological inlet channel (1). An ecological purification tank (5) and an enhanced purification tank (3) are respectively located at the front and rear positions of the inner ring of the ring-shaped ecological sedimentation tank (2). The enhanced purification tank (3) and the ecological purification tank (5) are separated by a detachable ecological overflow weir (4). The detachable ecological overflow weir (4) is located between the two automatically adjustable sedimentation tanks (7). On the front side, the annular ecological sedimentation tank (2) and the enhanced purification tank (3) are separated by a perforated substrate filler wall (9) with attached biological brushes. The annular ecological sedimentation tank (2) and the ecological purification tank (5) are separated by a solid wall (8) with attached biological brushes. The ecological purification tank (5) is connected to the ecological effluent channel (6). An aeration pipe (10) is installed in the enhanced purification tank (3). An MBBR filler mesh box (11) is installed on the aeration pipe (10). An aerator (12) is connected to the aeration pipe (10) located outside the annular ecological sedimentation tank (2).

2. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The ecological water intake channel (1) is a multi-level overflow ladder structure. Water intake side ditches (14) are set longitudinally on both sides of the ecological water intake channel (1). An overflow retaining wall (15) is set on the ecological water intake channel (1) and inside the water intake side ditches (14). A collection sedimentation tank (16) is set at the end of the water intake side ditches (14). Several ladder-shaped filtration and purification layers (17) are set inside the ecological water intake channel (1) and inside the overflow retaining wall (15). The ladder-shaped filtration and purification layers (17) include a planting soil layer (18) and a gravel filler layer (19) set on the upper and lower sides.

3. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The water level automatically regulating sedimentation tank (7) is equipped with a weight-adjustable automatic flap gate (20) at the water inlet end. The gate of the weight-adjustable automatic flap gate (20) is a multi-layer frame structure. The gate frame in the middle of the weight-adjustable automatic flap gate (20) is installed through a rotating shaft (21), and the gate frames on both sides are inserted with load blocks. The bottom of the main structure in the middle of the water level automatically regulating sedimentation tank (7) is a sedimentation tank (22). The water level automatically regulating sedimentation tank (7) is equipped with a matrix filling wall (23) at the water outlet end.

4. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The lower part of the detachable ecological overflow weir (4) is made of plain concrete solid wall (24), and the upper part is made of hollow structure. The outer side of the hollow structure is a gabion mesh frame (25). The gabion mesh frame (25) is embedded with a detachable mixed filler module (26). The detachable mixed filler module (26) is made of MBBR filler and gravel and other matrix fillers mixed in a 1:1 volume ratio.

5. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The MBBR packing mesh box (11) adopts a pull-out structure. The bottom of the MBBR packing mesh box (11) is equipped with a pull-out slide rail (27). The upper part of the MBBR packing mesh box (11) is equipped with a solar panel (28). The MBBR packing mesh box (11) is equipped with an MBBR packing module (29). The MBBR packing module (29) is composed of a mixture of MBBR packing (30) and low-temperature resistant microbial agent pack (31).

6. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 5, characterized in that: The low-temperature resistant microbial agent pack (31) has a porous, slow-release, transparent spherical structure. The carrier of the low-temperature resistant microbial agent pack (31) uses sodium alginate and diatomaceous earth as the embedding body. The specific preparation method of the embedding body is as follows: sodium alginate and diatomaceous earth are mixed evenly in a mass ratio of 7:2, and sterilized ultrapure water at 70℃-80℃ is added at a mass concentration of 2.5%.

7. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 5, characterized in that: The composite microbial solution used in the low-temperature resistant microbial agent package (31) includes *Pseudomonas stutzeri*, *Pseudomonas fragi*, and *Pseudarthrobacter*. The volume ratio of the composite microbial solution to the microbial agent carrier is 1:9, and the concentration of the composite microbial solution is greater than 1.5 × 10⁻⁶. 8 CFU / mL.

8. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The aeration pipe (10) is provided with two exhaust pipes (34), and the exhaust pipe (27) is at a 45° angle to the vertical plane and is set obliquely downward.

9. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: The exterior of the wall with the biological brush-shaped perforated matrix filler (9) is a biological brush, and the interior is filled with matrix filler, which includes gravel or volcanic rock.

10. The aquaculture wastewater ecological purification system based on bioaugmentation effect according to claim 1, characterized in that: An activated carbon filter wall (13) is installed in the middle of the ecological water outlet channel (6).

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