Aquaculture effluent treatment apparatus

Abstract

This utility model relates to the field of wastewater treatment technology and discloses a livestock wastewater treatment device, including a treatment tank and a partition installed inside the treatment tank. One end of the treatment tank has an outlet. A first filter screen is provided on one side of the partition, and a second filter screen is provided at the bottom of the partition. The filter opening of the first filter screen is larger than that of the second filter screen. An installation frame is installed on the inner wall of the treatment tank, and a disinfection tank is provided on the inner wall of the installation frame. The disinfection tank contains disinfectant. A biofilm filter plate is provided at one end of the inner wall of the treatment tank, and the biofilm filter plate is located at the outlet end. This device offers advantages such as timely, accurate, and efficient disinfection, avoids the inaccuracies of manual dosing, and improves space utilization and treatment efficiency. It solves problems such as easy clogging of the filtration system, inaccurate disinfectant dosing, low automation, and poor synergy and integration of the treatment process.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for treating aquaculture wastewater. Background Technology

[0002] With the rapid development of intensive and large-scale aquaculture, the stocking density is constantly increasing, resulting in a large volume of aquaculture wastewater with a high pollution load, which has become one of the important sources of agricultural non-point source pollution. Aquaculture wastewater is rich in organic suspended solids such as uneaten feed, feces, and biological carcasses, as well as nutrients such as nitrogen and phosphorus. If discharged directly without effective treatment, it can easily lead to the deterioration of water quality in receiving water bodies, algal blooms, reduced dissolved oxygen, and even the spread of diseases. Currently, common methods for treating aquaculture wastewater include sedimentation tanks, filter dams, microbial purification, and constructed wetlands. However, these methods have many limitations in practical applications: traditional filter screens are prone to clogging when treating high concentrations of suspended solids, requiring frequent shutdowns for cleaning or replacement, resulting in low automation and a large workload for maintenance; disinfection often involves pre-preparing disinfectant solutions and adding them at fixed times and quantities, which makes it difficult to achieve precise and timely disinfection based on water volume fluctuations, often leading to insufficient disinfectant dosage resulting in incomplete sterilization, or excessive dosage causing secondary pollution and wasted costs; at the same time, the various units in the treatment process (such as physical filtration, chemical disinfection, and biological purification) often operate independently with poor coordination, resulting in large equipment footprints, long treatment processes, and low efficiency, making it difficult to meet the needs of modern aquaculture farms for efficient, continuous, and stable wastewater treatment. Therefore, there is an urgent need to develop an integrated, highly automated aquaculture wastewater treatment equipment that can effectively solve the problems of filter clogging and precise disinfection. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a wastewater treatment device for aquaculture, which offers timely, accurate, and efficient disinfection, avoids the inaccuracies of manual dosing, greatly improves the automation level of the equipment, and enhances space utilization and treatment efficiency. It is particularly suitable for installation and use in aquaculture farms with limited land. It solves the problems of easy clogging of filtration systems and graded filtration, inaccurate disinfectant dosing and low automation, and poor synergy and low integration of treatment processes.

[0004] (II) Technical Solution To achieve the aforementioned goals of significantly improving the automation level of the equipment and increasing space utilization and processing efficiency, this utility model provides the following technical solution: an aquaculture wastewater treatment device, comprising a treatment tank and a partition disposed inside the treatment tank, with an outlet at one end of the treatment tank, a first filter screen disposed on one side of the partition, and a second filter screen disposed at the bottom of the partition, the filter opening of the first filter screen being larger than that of the second filter screen, an installation frame mounted on the inner wall of the treatment tank, and a disinfection tank disposed on the inner wall of the installation frame, the disinfection tank containing disinfectant, and a biofilm filter plate disposed at one end of the inner wall of the treatment tank, with the biofilm filter plate disposed at one end of the outlet.

[0005] Preferably, the first filter screen is fixedly installed on one side of the partition, the second filter screen is installed on the bottom side inside the processing box, and the second filter screen is fixedly installed on the inner wall of the bottom of the partition.

[0006] Preferably, the inner wall of the disinfection tank is provided with multiple air bladders, and the air bladders are filled with disinfectant. The disinfection tank is provided with a vertically movable lifting plate, and a cutting blade is fixedly installed at one end of the lifting plate. The cutting blade is located at the bottom of the air bladder.

[0007] Preferably, the inner wall of the disinfection tank is equipped with a limiting frame, and the inner wall of the limiting frame is provided with an installation plate. The bottom of the installation plate is provided with a float ball, and one end of the lifting plate is fixedly installed on one end of the installation plate. One end of the lifting plate passes through the inner wall of the limiting frame, and the outer side of the lifting plate is slidably connected to the inner wall of the limiting frame.

[0008] Preferably, the inner wall of the treatment box is provided with a limiting block, and the limiting block is fixedly installed on the inner wall of one end of the treatment box. The biofilm filter plate is installed in the middle of the limiting block and is placed at an angle. One end of the biofilm filter plate is provided with a fixing strip, and the fixing strip is installed at the bottom of the treatment box.

[0009] Preferably, a water inlet is installed at one end of the treatment tank, and the water outlet of the water inlet is located inside the treatment tank. A water inlet is installed on the upper side of the water inlet, and the water inlet is located on the outside of the treatment tank.

[0010] (III) Beneficial Effects Compared with existing technologies, this utility model provides aquaculture wastewater treatment equipment with the following beneficial effects: This equipment achieves two-stage gradient filtration of suspended solids by setting up a first filter screen and a second filter screen with different filtration opening sizes, and using a baffle to guide the water flow path. First, the first filter screen with a larger opening intercepts larger particles of uneaten feed and feces, and then the second filter screen with a smaller opening finely filters smaller suspended solids. This structure effectively avoids the problem of a single filter screen clogging rapidly due to excessive instantaneous load, reduces the cleaning burden, and ensures the continuity and stability of the filtration effect. Furthermore, by setting up a disinfection tank with built-in airbags and a cutting and releasing mechanism controlled by a float, it innovatively realizes the function of automatically adding disinfectant according to water level changes. When the water level in the treatment tank rises, the float rises accordingly, and the cutting blade drives the linkage mechanism to puncture the airbags containing a measured amount of disinfectant. The higher the water level, the more airbags are punctured, and the more disinfectant is added. The amount of disinfectant solution is also increased accordingly, which realizes the linkage and matching between disinfectant dosing and water inflow, ensuring timely, accurate and efficient disinfection, avoiding the inaccuracy of manual dosing, and greatly improving the automation level of the equipment. Finally, the equipment integrates the three major functional modules of physical filtration, chemical disinfection and biological purification into a single treatment tank. The compact structure optimizes the treatment process. The effluent undergoes physical interception, automatic disinfection and biodegradation in sequence, which greatly shortens the treatment path and improves space utilization and treatment efficiency. It is particularly suitable for installation and use in farms with limited land, providing reliable equipment support for achieving the standard discharge or reuse of aquaculture effluent. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present utility model; Figure 2 This is a diagram showing the internal structure of the processing box of this utility model; Figure 3 This is a cross-sectional view of the processing box of this utility model; Figure 4 This is a cross-sectional view of the disinfection tank of this utility model.

[0012] In the diagram: 1. Treatment tank; 2. Outlet; 3. Baffle; 4. Disinfection tank; 5. Inlet tank; 6. Inlet; 7. Mounting frame; 8. Fixing strip; 9. Biofilm filter plate; 10. Limiting block; 11. First filter screen; 12. Second filter screen; 13. Limiting frame; 14. Float ball; 15. Mounting plate; 16. Lifting plate; 17. Cutting blade; 18. Airbag. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example: Please refer to Figure 1-4 A wastewater treatment device for aquaculture includes a treatment tank 1 and a partition 3 disposed inside the treatment tank 1. One end of the treatment tank 1 has an outlet 2. A first filter screen 11 is disposed on one side of the partition 3, and a second filter screen 12 is disposed at the bottom of the partition 3. The filter opening of the first filter screen 11 is larger than that of the second filter screen 12. An installation frame 7 is installed on the inner wall of the treatment tank 1, and a disinfection tank 4 is disposed on the inner wall of the installation frame 7. The disinfection tank 4 contains disinfectant. A biofilm filter plate 9 is disposed at one end of the inner wall of the treatment tank 1, and the biofilm filter plate 9 is located at one end of the outlet 2. The interior of the treatment tank 1 is roughly divided into two areas by a partition 3. The outlet 2 at one end of the treatment tank 1 is used to discharge purified water. The first filter screen 11 is disposed on one side of the partition 3, and the second filter screen 12 is disposed at the bottom of the partition 3. The mesh size of the first filter screen 11 is larger than that of the second filter screen 12, thus forming a two-stage filtration system from coarse to fine, which intercepts solid pollutants of different particle sizes. An installation frame 7 is fixed to the inner wall of the treatment tank 1, and a disinfection tank 4 is installed inside to store solid or high-concentration disinfectant concentrate. A biofilm filter plate 9 is installed on the inner wall of the treatment tank 1 near the outlet 2. Beneficial microorganisms are attached to this filter plate to degrade dissolved organic matter, ammonia nitrogen, nitrite, etc., in the water, forming the core of the advanced treatment process.

[0015] The first filter screen 11 is fixedly installed on one side of the partition 3, and the second filter screen 12 is installed on the bottom side inside the treatment tank 1, and is also fixedly installed on the inner wall of the bottom of the partition 3. The first filter screen 11 is fixed to the side of the partition 3 and is used to initially intercept larger solid waste such as feces and uneaten feed. The second filter screen 12 is horizontally installed at the bottom of the treatment tank 1 and close to the lower edge of the partition 3, and is used to filter finer suspended particles. This layout forces the water flow to pass through two stages of filtration in sequence, improving the solid-liquid separation effect. The effluent flows in from the inlet end, first passing through the first filter screen 11, where large particles of impurities are intercepted. The water flows downward and around the bottom of the partition 3, then upward through the second filter screen 12, where fine particles are further removed.

[0016] The disinfection tank 4 has multiple airbags 18 on its inner wall, each containing disinfectant. A vertically movable lifting plate 16 is located inside the tank, with a cutting blade 17 fixedly mounted at one end. The cutting blade 17 is positioned at the bottom of the airbags 18. A limit frame 13 is installed on the inner wall of the disinfection tank 4, and a mounting plate 15 is located on the inner wall of the limit frame 13. A float ball 14 is located at the bottom of the mounting plate 15, and one end of the lifting plate 16 is fixedly mounted on one end of the mounting plate 15. One end of the lifting plate 16 penetrates the inner wall of the limit frame 13, and the outer side of the lifting plate 16 is slidably connected to the inner wall of the limit frame 13. Multiple airbags 18 containing liquid or gel-like disinfectants, such as concentrated chlorine dioxide effervescent tablets or sodium hypochlorite gel, are suspended inside the disinfection tank 4. A vertically movable lifting plate 16 is located directly below it, with a cutting blade 17 fixedly mounted on it. The lifting plate 16 is connected to a float 14 via a mounting plate 15. The float 14 and the mounting plate 15 are constrained within a limit frame 13, allowing only up-and-down movement. When the water level in the treatment tank 1 rises, the float 14 rises with it under buoyancy. The float 14 drives the mounting plate 15 and the lifting plate 16 upward together, causing the cutting blade 17 fixed on the lifting plate 16 to puncture the disinfection airbags 18 above. Disinfectant flows out from the punctured airbags 18 and dissolves in the water flowing through the disinfection tank 4, achieving disinfection. The greater the water flow, the faster and higher the water level rises, and the more airbags 18 are punctured, resulting in a larger dose of disinfectant released. This achieves automatic control of the disinfectant dosage and the influent water volume, requiring no external power or manual intervention, ensuring disinfection effectiveness while avoiding waste of disinfectant.

[0017] The inner wall of the treatment tank 1 is equipped with a limiting block 10, which is fixedly installed on the inner wall of one end of the treatment tank 1. The biofilm filter plate 9 is installed in the middle of the limiting block 10 and is placed at an angle. One end of the biofilm filter plate 9 is equipped with a fixing strip 8, which is installed at the bottom of the treatment tank 1. The biofilm filter plate 9 is obliquely fixed to the end of the treatment tank 1 by the limiting block 10 and the fixing strip 8. This oblique installation increases the contact area and time between the water flow and the filter plate, providing more space for microorganisms to attach and react. After physical filtration and disinfection, the water slowly flows through the obliquely placed biofilm filter plate 9. The microbial film attached to it biologically oxidizes and decomposes the remaining dissolved organic pollutants, ammonia nitrogen, etc. in the water, ultimately completing deep purification and meeting the standards for safe discharge or reuse.

[0018] A water inlet trough 5 is installed at one end of the treatment tank 1, and the outlet of the water inlet trough 5 is located inside the treatment tank 1. A water inlet 6 is installed on the upper side of the water inlet trough 5, and the water inlet 6 is located on the outer side of the treatment tank 1. The water inlet trough 5 serves to buffer and evenly distribute water, preventing the water flow from directly impacting the internal devices and ensuring the stability of the subsequent treatment process.

[0019] Working principle: The wastewater flows in from the inlet and first passes through the first filter screen 11, where large particles are trapped. The water flows downward and bypasses the bottom of the baffle 3, then rises through the second filter screen 12, where fine particles are further removed. When the water level in the treatment tank 1 rises, the float 14 rises with it under buoyancy. The float 14 drives the mounting plate 15 and the lifting plate 16 to move upward together, causing the cutting blade 17 fixed on the lifting plate 16 to puncture the disinfection airbag 18 above. The disinfectant flows out from the punctured airbag 18 and dissolves in the water flowing through the disinfection tank 4, achieving disinfection. After physical filtration and disinfection, the water slowly flows through the inclined biofilm filter plate 9. The microbial film attached to it biologically oxidizes and decomposes the remaining dissolved organic pollutants, ammonia nitrogen, etc. in the water, ultimately completing deep purification and meeting the standards for safe discharge or reuse. One end of the treatment tank 1 has an outlet 2 for discharging the purified water.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A farming tail water treatment device, comprising a treatment tank (1), and a partition plate (3) arranged inside the treatment tank (1), and one end of the treatment tank (1) is provided with a water outlet (2), characterized in that: A first filter screen (11) is provided on one side of the partition (3), and a second filter screen (12) is provided at the bottom of the partition (3). The filter opening of the first filter screen (11) is larger than that of the second filter screen (12). An installation frame (7) is installed on the inner wall of the treatment box (1), and a disinfection tank (4) is provided on the inner wall of the installation frame (7). The disinfection tank (4) contains disinfectant. A biofilm filter plate (9) is provided at one end of the inner wall of the treatment box (1), and the biofilm filter plate (9) is located at one end of the outlet (2).

2. The device for treating aquaculture tailwater of claim 1, wherein: The first filter screen (11) is fixedly installed on one side of the partition (3), and the second filter screen (12) is installed on the bottom side inside the processing box (1), and the second filter screen (12) is fixedly installed on the inner wall of the bottom of the partition (3).

3. The aquaculture wastewater treatment equipment according to claim 1, characterized in that: The inner wall of the disinfection tank (4) is provided with multiple airbags (18), and the airbags (18) are filled with disinfectant. The disinfection tank (4) is provided with a vertically movable lifting plate (16), and a cutting blade (17) is fixedly installed at one end of the lifting plate (16). The cutting blade (17) is located at the bottom of the airbags (18).

4. The aquaculture wastewater treatment equipment according to claim 3, characterized in that: The inner wall of the disinfection tank (4) is equipped with a limiting frame (13), and the inner wall of the limiting frame (13) is provided with an installation plate (15). The bottom of the installation plate (15) is provided with a float (14), and one end of the lifting plate (16) is fixedly installed on one end of the installation plate (15). One end of the lifting plate (16) penetrates the inner wall of the limiting frame (13), and the outer side of the lifting plate (16) is slidably connected to the inner wall of the limiting frame (13).

5. The aquaculture wastewater treatment equipment according to claim 1, characterized in that: The inner wall of the treatment box (1) is provided with a limiting block (10), and the limiting block (10) is fixedly installed on the inner wall of one end of the treatment box (1). The biofilm filter plate (9) is installed in the middle of the limiting block (10), and the biofilm filter plate (9) is placed at an angle. One end of the biofilm filter plate (9) is provided with a fixing strip (8), and the fixing strip (8) is installed at the bottom of the treatment box (1).

6. The aquaculture wastewater treatment equipment according to claim 1, characterized in that: One end of the treatment box (1) is equipped with a water inlet tank (5), and the water outlet of the water inlet tank (5) is located inside the treatment box (1). A water inlet (6) is installed on the upper side of the water inlet tank (5), and the water inlet (6) is located on the outer side of the treatment box (1).

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