An ecological treatment system for mariculture effluent in estuary

Abstract

The application discloses an estuary area seawater breeding tail water ecological treatment system and relates to the technical field of water treatment. The system comprises a first ditch for receiving tail water discharged from a plurality of breeding areas, a sedimentation tank connected to a water discharge end of the first ditch, at least one oxidation aeration tank connected to a water discharge end of the sedimentation tank, an ecological purification tank with a water inlet connected to a water discharge end of the oxidation aeration tank, and a second ditch connected to a water discharge end of at least one ecological purification tank. The estuary area seawater breeding tail water ecological treatment system enhances water purification effect through a whole and orderly process treatment process, makes different treatment processes more detailed, and maintains the effect of discharging tail water up to the standard.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically to an ecological treatment system for marine aquaculture wastewater in estuaries. Background Technology

[0002] In marine aquaculture, in order to increase aquaculture production and pursue economic benefits, intensive farming models with high stocking density and high feeding are commonly adopted. As the problem of water pollution caused by aquaculture wastewater is becoming increasingly prominent, the treatment of aquaculture wastewater is a key issue that the aquaculture industry urgently needs to solve.

[0003] In the existing technology, the output of aquaculture wastewater is large, the composition of the wastewater is complex, the suspended solids make it difficult to purify the water, the oxidation and aeration effects are not good, and some enterprises have relatively simple wastewater treatment solutions, which use simple filtration or biological treatment processes. As a result, the discharged wastewater is difficult to meet the good discharge standards and still causes pollution to the ecological environment. In view of this, in-depth research on the above problems has led to this case. Summary of the Invention

[0004] This application provides an ecological treatment system for marine aquaculture wastewater in estuary areas. The main purpose is to solve the problem that the wastewater discharged from these systems, which uses simple filtration or biological treatment processes, is difficult to meet the discharge standards and still causes pollution to the ecological environment.

[0005] To achieve the above objectives, this application provides an ecological treatment system for marine aquaculture wastewater in estuaries, comprising:

[0006] The first ditch is used to receive wastewater discharged from multiple aquaculture areas;

[0007] A sedimentation tank, which is connected to the drainage end of the first ditch;

[0008] An oxidation aeration tank, at least one of which is connected to the drainage end of the sedimentation tank;

[0009] An ecological purification pond, wherein the inlet of the ecological purification pond is connected to the outlet of the oxidation aeration pond;

[0010] The second ditch is connected to the drainage end of at least one of the ecological purification ponds.

[0011] In one feasible embodiment, the oxidation aeration tank includes: connecting pipes and a tank body, with two connecting pipes respectively disposed at both ends of the tank body; a bottom frame, which is fixedly disposed at the bottom of the tank body; a displacement adjustment assembly, which is disposed on the outer side of one end of the tank body; aeration pipes, with multiple aeration pipes respectively fixed on the inner side of the bottom frame, and the bottom end of each aeration pipe is also provided with an aeration nozzle; a deep mixing assembly, which is movably disposed at the top of the bottom frame and connected to the displacement adjustment assembly; a defoaming assembly, which is disposed at the top of the tank body and located on the side of the water flow outward direction; and a drive assembly, which is disposed on the outer side of the tank body and connected to the deep mixing assembly.

[0012] In one feasible implementation, the aeration pipes are divided into at least two groups, and each group of aeration pipes is connected to a corresponding air inlet pipe.

[0013] In one feasible implementation, the aeration nozzle is tilted downwards to aerate, and the spray direction of the aeration nozzle is located on the inlet side of the tailwater flow direction.

[0014] In one feasible implementation, the displacement adjustment assembly includes: a screw, which is rotatable about its own axis and disposed in the middle of the outer wall of the pool body; a movable frame, which is screwed to the outside of the screw and is horizontally arranged; and two connecting rods, which pass through the pool body and whose two ends are respectively connected to the movable frame and the deep mixing assembly.

[0015] In one feasible implementation, the deep mixing component includes: a combination frame, which is movably snapped onto the top of the bottom frame via a slide groove; support rods, a plurality of support rods being fixedly installed on the top of the combination frame and the plurality of support rods being equally spaced; and a stirring plate, which is rotatably mounted on two of the support rods via a rotating shaft.

[0016] In one feasible implementation, the stirring plate is composed of multiple plates, each plate having a first bend portion, the first bend portion forming a first temporary holding area with the plate body, and the first bend portion also having a second bend portion, the second bend portion forming a second temporary holding area with the first bend portion.

[0017] In one possible implementation, a portion of the agitator is made of a mesh material.

[0018] In one feasible embodiment, the drive assembly includes: guide rods, a plurality of guide rods being fixedly mounted on the outer wall of the pool body and on the same side as the displacement adjustment assembly; a drive motor, the drive motor being movably mounted on the plurality of guide rods via a motor mounting base; a moving rod, the moving rod being fixedly mounted on the outer side of the support rod located on one side of the drive motor; and a drive shaft, the drive shaft being rotatably disposed in the inner cavity of the moving rod about its own axis, the drive shaft being locked to the drive end of the drive motor via a coupling; the drive shaft being driven by the rotating shaft of the agitator via a plurality of helical gear sets.

[0019] In one feasible embodiment, the defoaming component includes: an overlap frame, which is fixedly mounted on the top of the pool body, and a driving device is also provided on the top of the overlap frame; an outer casing, which is fixedly mounted on the bottom of the overlap frame, and an inner casing is movably disposed in the inner cavity of the outer casing, the top of the inner casing being fixedly connected to the driving end of the driving device; a first filter screen and a second filter screen, which are fixedly mounted in the inner cavity of the inner casing, wherein the first filter screen is located above the second filter screen, and the filter holes of the first filter screen are larger than the filter holes of the second filter screen; a first liquid inlet and a second liquid inlet, which are respectively opened in the outer casing and the inner casing, and the positions of the first liquid inlet and the second liquid inlet coincide; and a pump body, which is fixedly installed at the bottom of the inner cavity of the outer casing, and the water inlet of the pump body is located below the second filter screen.

[0020] The ecological treatment system for marine aquaculture wastewater in estuaries provided in this application has at least the following beneficial effects:

[0021] 1. This invention includes treatment processes such as tailwater collection, primary filtration, sedimentation and purification, oxidation and aeration, dam defoaming filtration, secondary filtration, ecological purification, tertiary filtration, and discharge in compliance with standards. The integrated and orderly process enhances the water purification effect, refines the different treatment processes, and maintains the compliance of discharged tailwater.

[0022] 2. The oxidation aeration tank of this invention includes a bottom frame and aeration pipes, aeration nozzles, a deep mixing component, and a drive component installed on the bottom frame. The aeration component plays the role of aerating and oxygenating the water flow. The deep mixing component and the drive component work together to significantly extend the residence time of microbubbles in the water, allowing them to fully contact the effluent and the bacteria in the effluent, thereby improving the purification capacity of aerobic bacteria. The oxidation aeration tank adopts a scheme of temporarily delaying the rise of bubbles to prolong the full contact effect between oxygen and aerobic bacteria in the water, thereby greatly improving the purification effect of effluent in the oxidation aeration process.

[0023] 3. The aeration pipes of this invention can be divided into multiple groups. When the water flow velocity is low, the energy consumption can be reduced by decreasing the number of aeration devices in operation. Correspondingly, when sufficient aeration is required or the water flow velocity is high, all aeration pipes can be opened. Therefore, this solution provides a flexible control scheme for controlling the aeration volume or aeration effect, meeting the practical needs of controlling the aeration volume under different conditions.

[0024] 4. The present invention also includes a defoaming component, wherein the first filter screen in the inner chamber filters large particulate impurities, and the filtered water flows into the second filter screen for a second filtration. During the filtration process, impurities are separated and bubbles are eliminated. The water after double filtration flows into the bottom of the inner cavity of the outer chamber and is pumped back to the oxidation aeration tank to collect and eliminate the large number of bubbles generated during the oxidation aeration process, preventing a large number of bubbles from obscuring the water surface and ensuring normal contact between the water surface and the air for nutrient supply. Attached Figure Description

[0025] Figure 1 This paper shows a structural block diagram of an ecological treatment system for marine aquaculture wastewater in estuary areas, provided in an embodiment of this application.

[0026] Figure 2 A process flow diagram of an ecological treatment system for marine aquaculture tailwater in estuary areas, provided for an embodiment of this application, is shown.

[0027] Figure 3 A schematic diagram of the structure of the oxidation aeration tank provided in the embodiments of this application is shown;

[0028] Figure 4 A cross-sectional structural schematic diagram of an oxidation aeration tank provided for an embodiment of this application is shown;

[0029] Figure 5 A top view of the oxidation aeration tank provided in an embodiment of this application is shown.

[0030] Figure 6 A schematic diagram of the main cross-sectional structure of the oxidation aeration tank provided in an embodiment of this application is shown;

[0031] Figure 7 A cross-sectional view of the defoaming component provided in an embodiment of this application is shown.

[0032] Figure 8 for Figure 2 Enlarged view of point A in the image;

[0033] Figure 9 for Figure 5 Enlarged view of point B in the image.

[0034] In the diagram: 1. First ditch; 2. Sedimentation tank; 3. Oxidation aeration tank; 4. Ecological purification tank; 5. Second ditch; 31. Connecting pipe; 32. Tank body; 33. Bottom frame; 34. Displacement adjustment component; 35. Aeration pipe; 36. Aeration nozzle; 37. Deep mixing component; 38. Defoaming component; 39. Drive component; 341. Screw; 342. Moving frame; 343. Connecting rod; 371. Combination frame; 372. 373. Support rod, 384. Stirring plate, 385. Overlapping frame, 386. Outer casing, 387. Inner casing, 388. First filter screen, 389. First liquid inlet, 380. Second liquid inlet, 381. Drive device, 382. Pump body, 393. Second filter screen, 394. Guide rod, 395. Drive motor, 396. Moving rod, 397. Drive shaft, 388. First bending part, 3799. Second bending part. Detailed Implementation

[0035] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0036] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0037] The ecological treatment system for marine aquaculture wastewater in estuary areas provided in this application aims to solve the problem that the existing technology uses simple filtration or biological treatment processes, which makes it difficult to maintain the wastewater in good compliance with discharge standards and still causes pollution to the ecological environment.

[0038] Please see Figures 1-9The estuarine marine aquaculture wastewater ecological treatment system provided in this application includes: a first ditch 1, a sedimentation tank 2, an oxidation aeration tank 3, an ecological purification tank 4, and a second ditch 5. The first ditch 1 is used to receive wastewater discharged from multiple aquaculture areas; the sedimentation tank 2 is connected to the drainage end of the first ditch 1; at least one oxidation aeration tank 3 is connected to the drainage end of the sedimentation tank 2; the inlet of the ecological purification tank 4 is connected to the drainage end of the oxidation aeration tank 3; and the second ditch 5 is connected to the drainage end of at least one ecological purification tank 4.

[0039] Based on the above technical solutions, please refer to Figure 2 The treatment process of the ecological treatment system for marine aquaculture tailwater in estuary areas provided by the present invention includes the following steps: S1, tailwater collection; S2, primary filtration; S3, sedimentation and purification; S4, oxidation and aeration; S5, dam defoaming filtration; S6, secondary filtration; S7, ecological purification; S8, tertiary filtration; S9, discharge in compliance with standards.

[0040] Specifically, the wastewater collection system is used to collect wastewater generated from multiple aquaculture areas and discharge it through the first ditch 1. In the actual process, the collected wastewater first enters the sedimentation tank 2 for sedimentation and purification. The sediment after sedimentation can be used as bio-organic fertilizer. The wastewater after sedimentation then enters the oxidation aeration tank 3 for oxidation and aeration treatment. This process is usually achieved through multiple parallel air supply pipes fixed in the aeration tank and aerators connected to the ends of the air supply pipes. The gas in the air supply pipes passes through the aeration micropores of the aerators. As the wastewater enters, tiny floating bubbles are formed. These bubbles come into full contact with the aerobic bacteria in the aeration tank, and the wastewater is decomposed and purified through a biochemical reaction. The bubbles or floating matter generated during this process can be treated and collected by the defoaming component 38 in this system. The effluent after oxidation and aeration is filtered through a secondary filter and flows out into the ecological purification tank 4. The ecological purification tank 4 can further purify the impurities in the water with the help of microorganisms. The treatment process is energy-saving and environmentally friendly. The effluent after ecological purification is filtered through a tertiary filter and discharged uniformly after passing the test.

[0041] It should be noted that the materials used in the various filtration processes applied in this system can be one or more of the following: filter screens, filter media, natural aquatic plants, or artificial aquatic plants.

[0042] Please see Figures 3-6In some examples, the oxidation aeration tank 3 further includes: connecting pipes 31, tank body 32, bottom frame 33, displacement adjustment component 34, aeration pipes 35, aeration nozzles 36, deep mixing component 37, defoaming component 38, and drive component 39. Two connecting pipes 31 are respectively installed at both ends of the tank body 32; the bottom frame 33 is fixedly installed at the bottom of the tank body 32; the displacement adjustment component 34 is installed on the outer side of one end of the tank body 32; multiple aeration pipes 35 are respectively fixed on the inner side of the bottom frame 33, and the bottom end of the aeration pipes 35 is also provided with aeration nozzles 36; the deep mixing component 37 is movably installed at the top of the bottom frame 33 and connected to the displacement adjustment component 34; the defoaming component 38 is installed at the top of the tank body 32 and is located on the side of the water flow outward direction; the drive component 39 is installed on the outer side of the outer wall of the tank body 32 and connected to the deep mixing component 37.

[0043] It should be noted that the oxidation aeration tank 3 in this example adopts a method of temporarily delaying the rise of bubbles to prolong the full contact between oxygen and oxygen in the water and aerobic bacteria, thereby significantly improving the purification effect of the effluent in the oxidation aeration process. Specifically, the oxidation aeration tank 3 includes a bottom frame 33 and an aeration pipe 35, an aeration nozzle 36, a deep mixing component 37, and a drive component 39 installed on the bottom frame 33. The aeration component plays the role of aerating and oxygenating the water flow. The deep mixing component 37 and the drive component 39 work together to significantly prolong the residence time of microbubbles in the water, allowing them to fully contact the effluent and the bacteria in the effluent, thereby improving the purification capacity of aerobic bacteria.

[0044] In addition, the oxidation aeration tank 3 is also equipped with a position adjustment component and a defoaming component 38. The position adjustment component allows the staff to flexibly adjust the position of the deep mixing component 37. When facing water flow with different flow rates, by adjusting its position above the aeration nozzle 36, the bubbles generated by aeration can enter the deep mixing component 37 as much as possible, so as to achieve better aeration. The defoaming component 38, in this example, is used to collect and eliminate bubbles on the water surface after aeration or to collect floating objects on the water surface. On the one hand, it prevents a large amount of foam from occupying the water surface and hindering the oxygen content in the water surface. On the other hand, it prevents foam or floating objects from flowing into the subsequent purification stage through the pipes, which would make purification more difficult.

[0045] Please see Figures 3-6 In some examples, the aeration pipes 35 are further divided into at least two groups, with each group of aeration pipes 35 connected to a corresponding air inlet pipe.

[0046] Understandably, in this example, the aeration pipes 35 can be divided into multiple groups. When the water flow rate is low, energy consumption can be reduced by decreasing the number of operating aeration devices. Conversely, when sufficient aeration is required or the water flow rate is high, all aeration pipes 35 can be opened. Therefore, this solution provides a flexible control scheme for controlling the aeration volume or aeration effect, meeting the practical needs of controlling the aeration volume under different circumstances.

[0047] Please see Figure 4 and Figure 6 In some examples, the aeration nozzle 36 is tilted downwards to aerate, and the spray direction of the aeration nozzle 36 is located on the inlet side of the tailwater flow direction.

[0048] Understandably, when the aeration nozzle 36 is tilted, the aeration air it sprays can be sprayed in the direction of water flow. After the sprayed aeration air moves outward a certain distance, under the action of water flow and the influence of buoyancy on its own gas, the microbubbles move obliquely upward, so that the position of its movement path includes above the aeration nozzle 36 from which it is sprayed. The aeration bubbles at this position can be drawn into the deep mixing component 37, prolonging the full contact between the gas and aerobic bacteria.

[0049] Please see Figure 3 , 4 and Figure 6 In some examples, the displacement adjustment assembly 34 further includes: a screw 341, a movable frame 342, and a connecting rod 343. The screw 341 is rotatably mounted on the middle of the outer wall of the pool body 32. The movable frame 342 is screwed to the outside of the screw 341 at the middle and is horizontally arranged. Two connecting rods 343 pass through the pool body 32, and the two ends of the connecting rods 343 are respectively connected to the movable frame 342 and the deep mixing assembly 37.

[0050] It is understandable that the displacement adjustment component 34 is used in this scheme to adjust the position of the overall deep mixing component 37. Since the tailwater output may be different at different aquaculture stages, the flow rate of the water may also change accordingly, causing the upward movement trajectory of the aeration bubbles in this scheme to not coincide with the position of their corresponding stirring plates. Therefore, in this example, in order to meet the full mixing effect of the deep mixing component 37 at different water flow rates, the displacement adjustment component 34 is used.

[0051] In the actual process, the staff can turn the screw 341 by twisting the screw. After the screw 341 rotates, the moving frame 342 on its outer side will move linearly along the screw 341 through the action of the thread. Since the moving frame 342, the connecting rod 343 and the deep mixing component 37 are fixedly connected, when the moving frame 342 moves, it will also pull the deep mixing component 37 to move synchronously, so as to realize the position adjustment function of the deep mixing component 37.

[0052] For example, in order to improve the automatic control effect of this device, the operator may optionally install a control motor at screw 341 and drive the motor through remote or automated program control to achieve a more ideal and convenient control effect.

[0053] Please see Figures 3-6 and Figure 8 In some examples, the deep mixing component 37 further includes: a combination frame 371, support rods 372, and a stirring plate 373. The combination frame 371 is movably engaged with the top of the bottom frame 33 via a sliding groove. Multiple support rods 372 are respectively fixedly installed on the top of the combination frame 371, and the multiple support rods 372 are equally spaced. The stirring plate 373 is rotatably disposed between two support rods 372 via a rotating shaft. The stirring plate 373 is composed of multiple plates, each plate having a first bending portion 3731. The first bending portion 3731 and the plate body form a first temporary holding area. The first bending portion 3731 also has a second bending portion 3732, and the second bending portion 3732 and the first bending portion 3731 form a second temporary holding area.

[0054] It should be noted that the deep mixing component 37 is used in this solution to agitate the water flow in the oxidation aeration tank 3. On the one hand, agitation allows the water flow and air flow in the tank to come into full contact. On the other hand, during agitation, the agitator 373 in the deep mixing component 37 can intercept the upward movement of a large number of tiny bubbles generated during aeration, allowing them to remain in the water for a longer time. Combined with the tank water in agitation state, this significantly improves the oxidation aeration efficiency.

[0055] Specifically, after aeration generates tiny bubbles, the bubbles rise at an angle and are blocked by the plates in the agitator. After a large number of bubbles come into contact with the agitator, the agitator is driven by the drive motor 392 to rotate until one of the plates rotates to a vertical position. The bubbles continue to rise and enter the first temporary retention area between the first bend 3731 and the plate, where they are blocked by the first bend 3731 and temporarily retained. As the agitator continues to rotate, the plate and its first bend 3731 and second bend 3732 tilt. The bubbles inside move along the first bend 3731 to the second bend 3732. The agitator continues to rotate, and the bubbles enter the second temporary retention area in the second bend 3732, further extending the residence time of the bubbles in the water. As the agitator rotates again, the bubbles that have been fully irrigated or some of the bubbles rise and are discharged through the gap between the second bend 3732 and the plate.

[0056] In some examples, the agitator 373 is further constructed with a mesh material in certain areas. This mesh material has a certain degree of water permeability, which can reduce the rotational resistance of the entire agitator 373 in water.

[0057] Please see Figure 3 In some examples, the drive assembly 39 further includes: guide rods 391, drive motor 392, moving rod 393, and drive shaft 394. Multiple guide rods 391 are fixedly mounted on the outer wall of the pool body 32, on the same side as the displacement adjustment assembly 34. The drive motor 392 is movably mounted on the multiple guide rods 391 via a motor mounting base. The moving rod 393 is fixedly mounted on the outer side of a support rod 372 located on one side of the drive motor 392. The drive shaft 394 is rotatably disposed within the inner cavity of the moving rod 393, and is locked to the drive end of the drive motor 392 via a coupling. The drive shaft 394 is driven by the rotating shaft of the agitator 373 via multiple helical gear sets.

[0058] Understandably, the drive assembly 39 is used in the solution to drive the rotation of the stirring blades in the multiple deep mixing assemblies 37. When the deep mixing assembly 37 needs to be started, the drive motor 392 is started first. The motor is driven by the drive shaft 394 and multiple helical gear sets to transmit power to the corresponding rotating shafts of the multiple stirring blades, so as to realize the synchronous rotation of the multiple stirring blades.

[0059] The drive motor 392 is movably mounted on the guide rod 391 via the motor base. When the displacement adjustment component 34 adjusts the position of the deep mixing component 37, the drive motor 392 can make adaptive synchronous displacement, ensuring the feasibility of this solution.

[0060] Please see Figures 3-7In some examples, the defoaming component 38 further includes: a connecting frame 381, an outer housing 382, ​​an inner housing 383, a first filter screen 384, a first liquid inlet 385, a second liquid inlet 386, a pump body 388, a drive device 387, and a second filter screen 389. The connecting frame 381 is fixedly mounted on the top of the tank body 32, and the top of the connecting frame 381 is also provided with the drive device 387. The outer housing 382 is fixedly mounted on the bottom of the connecting frame 381, and the inner housing 383 is movably disposed in the inner cavity of the outer housing 382. The top of the inner housing 383 is connected to the drive device. The drive end of 387 is fixedly connected; the first filter screen 384 and the second filter screen 389 are fixedly installed in the inner cavity of the inner box 383, wherein the first filter screen 384 is located above the second filter screen 389, and the filter holes of the first filter screen 384 are larger than the filter holes of the second filter screen 389; the first liquid inlet 385 and the second liquid inlet 386 are respectively opened in the outer box 382 and the inner box 383, and the positions of the first liquid inlet 385 and the second liquid inlet 386 coincide; the pump body 388 is fixedly installed at the bottom of the inner cavity of the outer box 382, ​​and the water inlet of the pump body 388 is located below the second filter screen 389.

[0061] Understandably, the defoaming component 38 is used to collect and eliminate a large number of bubbles generated during the oxidation aeration process, preventing a large number of bubbles from obscuring the water surface and ensuring normal contact between the water surface and the air for oxygen supply. In the specific implementation process, when it is necessary to clean the bubbles or impurities on the water surface, the drive device 387 first pushes the inner box 383 to descend. After descending, the first liquid inlet 385 in the inner box 383 coincides with the second liquid inlet 386 on the outer box 382. Impurities or foam floating on the water surface can enter the inner box 383 through the first liquid inlet 385 and the second liquid inlet 386. Large particles of impurities are filtered by the first filter screen 384 set in the inner box 383. The filtered water then falls to the second filter screen for a second filtration. During the filtration process, impurities can be separated, and bubbles can be eliminated at the same time. The water after double filtration flows into the bottom of the inner cavity of the outer box 382 and is discharged back to the tank 32 of the oxidation aeration tank 3 by the pump body 388.

[0062] For example, the drive device 387 in this device may be a reciprocating motor, a push rod motor, a hydraulic cylinder, an electric push rod, a pneumatic cylinder, or other drive equipment with linear propulsion function.

[0063] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An ecological treatment system for marine aquaculture wastewater in estuary areas, characterized in that, include: The first ditch is used to receive wastewater discharged from multiple aquaculture areas; A sedimentation tank, which is connected to the drainage end of the first ditch; An oxidation aeration tank, at least one of which is connected to the drainage end of the sedimentation tank; An ecological purification pond, wherein the inlet of the ecological purification pond is connected to the outlet of the oxidation aeration pond; The second ditch is connected to the drainage end of at least one of the ecological purification ponds; The oxidation aeration tank includes: Connecting pipes and the pool body, with the two connecting pipes respectively installed at both ends of the pool body; A bottom frame, which is fixedly installed at the bottom of the inside of the pool body; A displacement adjustment assembly is disposed on the outer side of one end of the outer wall of the pool body; Aeration pipes, multiple aeration pipes are respectively fixed to the inner side of the bottom frame, and aeration nozzles are also provided at the bottom end of the aeration pipes; A deep mixing component, which is movably mounted on the top of the bottom frame and connected to the displacement adjustment component; A defoaming component is installed at the top of the pool body and is located on the side of the water outflow direction; A drive assembly is disposed on the outer side of the outer wall of the pool body and connected to the deep mixing assembly; The deep blending component includes: A combination frame, wherein the combination frame is movably snapped onto the top of the bottom frame via a sliding groove; Support rods, a plurality of support rods are respectively fixedly installed on the top of the combined frame, and the plurality of support rods are arranged at equal intervals; A stirring blade, which is rotatably mounted on the two support rods via a rotating shaft; The stirring plate is composed of multiple plates, each plate having a first bending portion, the first bending portion forming a first temporary holding area with the plate body, and the first bending portion also having a second bending portion, the second bending portion forming a second temporary holding area with the first bending portion. The displacement adjustment component includes: A screw, which is rotatable about its own axis, is disposed in the middle of the outer wall of the pool body; A movable frame, wherein the middle part of the movable frame is screwed to the outside of the screw rod, and the movable frame is horizontally arranged; Two connecting rods extend through the pool body, and the two ends of the connecting rods are respectively connected to the movable frame and the deep mixing component; The driving component includes: Guide rods, a plurality of the guide rods are fixedly mounted on the outer wall of the pool body and on the same side as the displacement adjustment assembly; A drive motor, which is movably mounted on multiple guide rods via a motor mounting base; A movable rod, which is fixedly installed on the outside of the support rod located on one side of the drive motor; A drive shaft is rotatable around its own axis and is disposed in the inner cavity of the moving rod. The drive shaft is locked to the drive end of the drive motor by a coupling. The drive shaft is driven by the rotating shaft of the agitator through multiple helical gear sets.

2. The ecological treatment system for marine aquaculture wastewater in estuary areas according to claim 1, characterized in that: The aeration pipes are divided into at least two groups, and each group of aeration pipes is connected to a corresponding air inlet pipe.

3. The ecological treatment system for marine aquaculture wastewater in estuary areas according to claim 1, characterized in that: The aeration nozzle is tilted downwards to aerate, and the spray direction of the aeration nozzle is located on the inlet side of the tailwater flow direction.

4. The ecological treatment system for marine aquaculture wastewater in estuary areas according to claim 1, characterized in that: Part of the agitator is made of a mesh material.

5. The ecological treatment system for marine aquaculture wastewater in estuary areas according to claim 1, characterized in that: The defoaming component includes: An overlapping frame is fixedly installed at the top of the pool body, and a driving device is also provided at the top of the overlapping frame; The outer housing is fixedly installed at the bottom end of the connecting frame. An inner housing is also movably installed in the inner cavity of the outer housing. The top end of the inner housing is fixedly connected to the driving end of the driving device. A first filter screen and a second filter screen are fixedly installed in the inner cavity of the inner box, wherein the first filter screen is located above the second filter screen, and the filter holes of the first filter screen are larger than the filter holes of the second filter screen; The first liquid inlet and the second liquid inlet are respectively opened in the outer box and the inner box, and the positions of the first liquid inlet and the second liquid inlet coincide. The pump body is fixedly installed at the bottom of the inner cavity of the outer casing, and the water inlet of the pump body is located below the second filter screen.

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