A device for treating aquaculture wastewater in conjunction with a land-based circular pond

Abstract

The application discloses a kind of aquaculture wastewater treatment devices used with land-based round pool, it is related to aquaculture wastewater treatment technical field, and its technical key points include processing box, the inner chamber of processing box is sequentially separated into coarse filtration area, sedimentation area, aeration zone and fine filtration area from left to right by partition plate, the inside of coarse filtration area is provided with coarse filtration component, and the coarse filtration component includes the bearing base plate connected in the inner chamber of coarse filtration area by bolt, the top of bearing base plate is fixedly installed with pressure bearing, the upper ring of pressure bearing is fixedly installed with gear ring, and the inner circular surface of gear ring is fixedly installed with several scraper rods distributed uniformly in circumference, the transmission structure of servo motor, gear ring is matched with scraper rod and conical filter screen in the application, which can not only scrape off filter screen sticky impurities and collect, solve the key problem of filter screen blockage, ensure coarse filtration efficiency and impurity removal effect, but also can adjust filter hole flow area to improve the universality of device, and can also provide support and correct slight deformation for filter screen.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater treatment technology, specifically to an aquaculture wastewater treatment device used in conjunction with a land-based circular pond. Background Technology

[0002] In recent years, land-based circular pond aquaculture has been widely used in intensive aquaculture due to its advantages such as small footprint, high stocking density, and ease of centralized management. However, land-based circular ponds continuously generate large amounts of aquaculture wastewater during the aquaculture process. This wastewater mainly contains pollutants such as fish excrement, uneaten feed, and suspended solids. Direct discharge of this wastewater can easily cause environmental pollution and waste water resources. Existing land-based circular ponds typically have a conical bottom structure, which facilitates the collection of fish excrement, uneaten feed, and other impurities towards the center of the bottom under gravity. A drain pipe is installed at the center of the bottom of the circular pond to periodically discharge the high-concentration wastewater.

[0003] Wastewater discharged from aquaculture typically requires multi-stage purification before recycling. The standard treatment process is as follows: Wastewater discharged from the land-based circular pond first passes through a coarse filtration unit, where larger particles of excrement and uneaten feed are intercepted and removed from the water. After preliminary filtration, the wastewater flows into a sedimentation tank for settling, allowing fine suspended solids to further settle and separate. The settled wastewater then enters an aeration tank for aeration, maintaining an aerobic microbial environment by introducing oxygen into the water. These microorganisms decompose toxic pollutants such as ammonia nitrogen and nitrite. The biochemically treated wastewater then flows through a filter layer composed of volcanic rock and other filter media for deep filtration, further purifying the water. Finally, the purified water is pumped back to the land-based circular pond by a return pump, achieving water resource recycling.

[0004] However, in actual use, the excrement and uneaten feed in the sewage are sticky and easily adhere to and clog the filter screen, resulting in poor water flow, reduced treatment efficiency, and the need for frequent manual cleaning. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wastewater treatment device for aquaculture that is used in conjunction with a land-based circular pond, effectively solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an aquaculture wastewater treatment device for use in conjunction with a land-based circular pond, comprising a treatment tank, wherein the inner cavity of the treatment tank is divided from left to right into a coarse filtration zone, a sedimentation zone, an aeration zone and a fine filtration zone by a partition plate, and a coarse filtration assembly is provided inside the coarse filtration zone.

[0007] The coarse filtration assembly includes a support base plate connected to the inner cavity of the coarse filtration zone by bolts. A pressure bearing is fixedly installed on the top of the support base plate. A gear ring is fixedly installed on the upper ring of the pressure bearing. A plurality of evenly distributed scrapers are fixedly installed on the inner circumferential surface of the gear ring. A circular groove is opened on the support base plate. A conical filter screen is fixedly installed on the lower ring of the pressure bearing through a filter screen mounting ring.

[0008] Preferably, the scraper is adapted to and coaxially arranged with the conical filter screen, and the outer arc surface of the scraper and the inner conical surface of the conical filter screen form a conical fit.

[0009] Preferably, a connecting cylinder that penetrates the conical filter screen is fixedly installed at the lower oblique end of the scraper, and an impurity collection box is threadedly connected to the connecting cylinder.

[0010] Preferably, a servo motor is fixedly mounted on the top of the support substrate, and a drive wheel is fixedly mounted on the output end of the servo motor, the drive wheel meshing with a gear ring.

[0011] Preferably, the coarse filtration zone and the sedimentation zone, the sedimentation zone and the aeration zone, and the aeration zone and the fine filtration zone are all interconnected by connecting conduits, and a pump body is fixedly installed on the connecting conduit between each adjacent zone.

[0012] Preferably, a water leakage plate is fixedly installed on the inner wall of the fine filtration zone, and a number of volcanic rocks are provided on the water leakage plate. A clean water drain pipe is fixedly connected to the treatment box on the side of the fine filtration zone, and a valve is fixedly installed on the clean water drain pipe.

[0013] Preferably, the top of the treatment box is bolted to a top cover, the top cover has ventilation holes in the aeration zone area, an air supply pump is fixedly installed on the top of the top cover, and an air supply pipe penetrating the top cover is fixedly installed at the output end of the air supply pump.

[0014] Preferably, a sewage inlet cylinder penetrating the top cover is fixedly installed on the top of the gear ring, and a downwardly extending conical guide shroud is fixedly installed on the inner circular surface of the sewage inlet cylinder, the conical guide shroud being coaxially arranged with the conical filter screen.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a scraper and a conical filter screen, and coordinating a servo motor and gear ring transmission structure, the sticky impurities attached to the conical filter screen can be scraped off and collected, eliminating the need for frequent manual cleaning, solving the problem of filter screen clogging, and ensuring the water flow efficiency and impurity removal effect of the coarse filtration stage.

[0016] 2. By setting a servo motor to drive the scraper to rotate, and using the scraper to block the filter holes of the conical filter screen, the effective flow area of ​​the filter holes can be flexibly adjusted to adapt to the differences in excrement and uneaten feed particle size of different aquaculture organisms, thereby improving the versatility and filtration adaptability of the device.

[0017] 3. By setting a scraper that always fits in contact with the conical filter screen, the filter screen can be supported to enhance its resistance to water flow impact. When the filter screen is slightly deformed due to impact, the scraper can be rotated to physically correct the deformed area, ensuring the stability of the filter hole size and maintaining the filtration effect. Attached Figure Description

[0018] Figure 1 This is a complete structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 For the present invention Figure 2 Another perspective structural diagram; Figure 4 This is a partially enlarged structural diagram of the coarse filter component of the present invention; Figure 5 This is a schematic diagram of the scraper and conical filter screen of the present invention; Figure 6 This is a schematic diagram of the connecting cylinder of the present invention.

[0019] In the picture: 1. Treatment tank; 2. Divider plate; 3. Coarse filtration zone; 4. Sedimentation zone; 5. Aeration zone; 6. Fine filtration zone; 7. Coarse filtration assembly; 71. Support base plate; 72. Pressure bearing; 73. Gear ring; 74. Scraper; 75. Filter screen mounting ring; 76. Conical filter screen; 77. Connecting cylinder; 78. Impurity collection box; 79. Servo motor; 710. Drive wheel; 8. Connecting conduit; 9. Pump body; 10. Drain plate; 11. Clean water drain pipe; 12. Top cover; 13. Vent hole; 14. Air pump; 15. Air guide pipe; 16. Sewage inlet cylinder; 17. Conical guide hood. Detailed Implementation

[0020] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0021] This invention provides a technical solution: Please see Figures 1-6A wastewater treatment device for aquaculture in conjunction with a land-based circular pond includes a treatment tank 1. The inner cavity of the treatment tank 1 is divided from left to right by a partition plate 2 into a coarse filtration zone 3, a sedimentation zone 4, an aeration zone 5, and a fine filtration zone 6. The coarse filtration zone 3 is equipped with a coarse filtration assembly 7. The coarse filtration assembly 7 includes a support base plate 71 bolted to the inner cavity of the coarse filtration zone 3. A pressure bearing 72 is fixedly installed on the top of the support base plate 71. A gear ring 73 is fixedly installed on the upper ring of the pressure bearing 72. A plurality of evenly distributed scrapers 74 are fixedly installed on the inner circumferential surface of the gear ring 73. A circular groove is formed on the support base plate 71. A conical filter screen 76 is fixedly installed on the lower ring of the pressure bearing 72 through a filter screen mounting ring 75. The scrapers 74 are adapted to and coaxially arranged with the conical filter screen 76. The outer arc surface of the scraper 74 and the inner conical surface of the conical filter screen 76 form a conical fit.

[0022] The partition plate 2 divides its inner cavity into a coarse filtration zone 3, a sedimentation zone 4, an aeration zone 5, and a fine filtration zone 6 to achieve multi-stage purification. The coarse filtration component 7 in the coarse filtration zone 3 is the core coarse filtration structure. The support base plate 71 provides installation support for the coarse filtration component 7. The pressure bearing 72 realizes the relative rotation between the gear ring 73 and the filter screen mounting ring 75. The gear ring 73 can drive the scraper 74 to rotate. When the scraper 74 rotates with the gear ring 73, it fits against the conical surface of the conical filter screen 76 to scrape off the impurities adhering to the filter screen. It can also support the conical filter screen 76 and correct its slight deformation. The filter screen mounting ring 75 fixes the conical filter screen 76 to the lower ring of the pressure bearing 72. The conical filter screen 76 performs initial coarse filtration on the incoming aquaculture wastewater, intercepting large particulate impurities. The coaxial and fitted structure of the two ensures the simultaneous realization of coarse filtration, impurity removal, and filter screen protection.

[0023] Please see Figures 2-6 A connecting cylinder 77 that penetrates the conical filter screen 76 is fixedly installed at the lower oblique end of the scraper 74, and an impurity collection box 78 is threadedly connected to the connecting cylinder 77.

[0024] After the scraper bar 74 rotates and scrapes away the sticky impurities on the conical filter screen 76, the impurities will slide down the inclined surface of the conical filter screen 76 and fall into the impurity collection box 78 for collection. At the same time, the threaded connection design makes the impurity collection box 78 easy to disassemble and clean, and convenient for later maintenance.

[0025] Please see Figures 2-6 A servo motor 79 is fixedly mounted on the top of the support base plate 71, and a drive wheel 710 is fixedly mounted on the output end of the servo motor 79. The drive wheel 710 meshes with the gear ring 73.

[0026] After the servo motor 79 starts, it drives the drive wheel 710 at its output end to rotate. The drive wheel 710 drives the gear ring 73 to rotate synchronously. The servo motor 79 serves as a power source to provide power for actions such as impurity scraping and filter hole adjustment. The drive wheel 710 and the gear ring 73 work together to realize the transmission and direction of power, drive the scraper 74 to rotate around the conical filter screen 76, and complete the actions of cleaning the filter screen, adjusting the flow area of ​​the filter hole, and correcting the deformation of the filter screen.

[0027] Please see Figure 2 and Figure 3 The coarse filtration zone 3 and the sedimentation zone 4, the sedimentation zone 4 and the aeration zone 5, and the aeration zone 5 and the fine filtration zone 6 are all interconnected by connecting conduits 8, and pump bodies 9 are fixedly installed on the connecting conduits 8 between each adjacent zone.

[0028] After each pump 9 is started, it provides power to push the wastewater in the coarse filtration zone 3 into the sedimentation zone 4 through the connecting pipe 8. The supernatant after sedimentation then enters the aeration zone 5 through the connecting pipe 8. The water after aeration is then driven by the pump 9 to be sent to the fine filtration zone 6 through the connecting pipe 8. The connecting pipe 8 serves as a water transport channel between the treatment zones, realizing the connection between the zones. The pump 9 provides power for the flow of aquaculture wastewater between different purification zones, ensuring that the wastewater completes the multi-stage purification process of coarse filtration, sedimentation, aeration, and fine filtration in an orderly manner.

[0029] Please see Figure 2 and Figure 3 A water leakage plate 10 is fixedly installed on the inner wall of the fine filtration zone 6. Several volcanic rocks are placed on the water leakage plate 10. A clean water drain pipe 11 is fixedly connected to the treatment box 1 on the side of the fine filtration zone 6. A valve is fixedly installed on the clean water drain pipe 11.

[0030] After aeration, the water enters the fine filtration zone 6 and flows through the volcanic rocks on the perforated plate 10. The clear water, after deep filtration by the volcanic rocks, remains at the bottom of the fine filtration zone 6. By opening the valve on the clear water drain pipe 11, the clear water can be discharged and reused. The perforated plate 10 supports the volcanic rock filter media and ensures that the water passes through smoothly. The volcanic rocks use their porous properties to perform deep filtration of the water, intercepting tiny impurities and adsorbing residual pollutants. The clear water drain pipe 11 provides a discharge channel for the purified clear water, and the valve on it can control the opening and closing of the clear water discharge, ensuring that the clear water is recycled and reused in the land-based circular pool as needed.

[0031] Please see Figures 1-3 The top of the treatment box 1 is bolted to a top cover 12. The top cover 12 is located in the aeration zone 5 and has a vent hole 13. An air supply pump 14 is fixedly installed on the top of the top cover 12. An air supply pipe 15 that passes through the top cover 12 is fixedly installed at the output end of the air supply pump 14.

[0032] When wastewater enters aeration zone 5, the air supply pump 14 is activated. It draws in outside air and delivers it to the wastewater in aeration zone 5 through the air guide pipe 15. Excess gas generated during aeration is discharged through the vent hole 13. The top cover 12 provides an installation base for the air supply pump 14 and protects the internal structure of the treatment tank 1. The vent hole 13 allows for gas circulation in aeration zone 5. The air supply pump 14 and the air guide pipe 15 work together to continuously supply oxygen to aeration zone 5, stabilize the living environment of aerobic microorganisms, and ensure their biochemical decomposition effect on pollutants such as ammonia nitrogen and nitrite in wastewater.

[0033] Please see Figures 1-4 The top of the gear ring 73 is fixedly installed with a sewage inlet cylinder 16 that penetrates the top cover 12. The inner circular surface of the sewage inlet cylinder 16 is fixedly installed with a downwardly extending conical guide shroud 17. The conical guide shroud 17 and the conical filter screen 76 are coaxially arranged.

[0034] The aquaculture wastewater from the land-based circular pond is transported to the wastewater inlet cylinder 16 via an external pipeline. Under the guidance of the conical guide shroud 17 inside, it flows smoothly and evenly to the coaxial conical filter screen 76 for coarse filtration. The wastewater inlet cylinder 16 serves as the wastewater inlet of the device, and is linked with the gear ring 73 to achieve stable wastewater introduction. The conical guide shroud 17 collects the water entering the wastewater inlet cylinder 16 and guides the water flow, while allowing the wastewater to contact the filter screen evenly to a certain extent to improve the coarse filtration effect. The two work together to ensure the stability of the water intake and the uniformity of filtration in the coarse filtration stage.

[0035] In practical use, the working principle of this invention is as follows: When it is necessary to treat the sewage at the bottom of the land-based circular pool, firstly, connect the sewage discharge pipe at the bottom of the land-based circular pool to the sewage inlet cylinder 16 through an external conduit. A water pump can be installed on this conduit to effectively avoid the problem of sewage not being able to be discharged smoothly due to insufficient sewage discharge power of the land-based circular pool itself. Then, open the sewage discharge valve at the bottom of the land-based circular pool, and the high-concentration sewage at the bottom of the pool will be transported to the sewage inlet cylinder 16 through the conduit with the help of the water pump or by its own gravity. After the sewage enters the sewage inlet cylinder 16, under the guidance of the conical guide shroud 17, it will flow smoothly and evenly into the coarse filter component 7. The sewage falls onto the conical filter screen 76 to complete the initial coarse filtration. Larger particles of fish excrement, uneaten food and other impurities in the water will be intercepted by the conical filter screen 76. With the help of the conical structure design of the conical filter screen 76, the intercepted impurities will slide down naturally under the action of gravity and finally collect and remain in the impurity collection box 78, realizing the initial collection of impurities.

[0036] The wastewater that has completed coarse filtration is pumped into sedimentation zone 4 via a pump 9 on the connecting pipe 8 between coarse filtration zone 3 and sedimentation zone 4. In sedimentation zone 4, the wastewater undergoes settling, allowing fine suspended solids not removed by coarse filtration to further settle and separate under gravity, achieving secondary solid-liquid separation. The supernatant after sedimentation is pumped into aeration zone 5 via the corresponding connecting pipe 8 by the pump 9 on the connecting pipe 8 between sedimentation zone 4 and aeration zone 5. Simultaneously, the air supply pump 14 on the top cover 12 is activated, drawing in outside air and continuously supplying it to the wastewater in aeration zone 5 via the air duct 15, providing sufficient oxygen to stably maintain aeration. The aerobic microorganisms in aeration zone 5 have a suitable living environment. During aeration, excess gas is discharged through the vent holes 13 of the top cover 12. The aerobic microorganisms effectively decompose toxic pollutants such as ammonia nitrogen and nitrite in the water, completing the biochemical purification treatment of the wastewater. After aeration, the water is transported to the fine filtration zone 6 through the connecting pipe 8 driven by the pump 9 on the connecting pipe 8 between aeration zone 5 and fine filtration zone 6. The wastewater passes through several volcanic rocks laid on the drain plate 10. The volcanic rocks, with their porous structure, perform deep filtration of the water, further intercepting tiny impurities and adsorbing residual pollutants, achieving deep purification of the water and ensuring the quality of the effluent.

[0037] After undergoing multi-stage purification, the clean water remains at the bottom of the fine filtration zone 6. When it is necessary to recycle the purified water back to the land-based circular pond, one end of the external connecting pipe is connected to the clean water discharge pipe 11, and the other end extends into the land-based circular pond. Then, the valve on the clean water discharge pipe 11 is opened, and the water pump on the external connecting pipe is started. Under the suction of the water pump, the qualified clean water in the fine filtration zone 6 will be transported back to the land-based circular pond through the clean water discharge pipe 11 and the external connecting pipe, thus realizing the recycling of aquaculture water resources.

[0038] To address the problem of filter screens being easily clogged by sticky impurities in existing aquaculture wastewater treatment processes, this device can activate the servo motor 79 (which has a self-locking function) in the coarse filtration component 7 at any time. After the servo motor 79 is activated, it drives the drive wheel 710 at the output end to rotate. The drive wheel 710 meshes with the gear ring 73, thereby driving the gear ring 73 to rotate synchronously. When the gear ring 73 rotates, it drives the scraper 74 on its inner side to rotate around the conical filter screen 76. Since the outer arc surface of the scraper 74 and the inner conical surface of the conical filter screen 76 are in conical contact, the scraper 74 will completely scrape off the sticky impurities attached to the inner conical surface of the conical filter screen 76 during rotation. The scraped impurities will slide down the inclined surface of the scraper 74 naturally and finally fall into the impurity collection box 78 for centralized collection. This eliminates the need for frequent manual cleaning and effectively solves the problems of poor water flow and reduced treatment efficiency caused by filter screen clogging.

[0039] Meanwhile, when raising different aquatic organisms, the size of their excrement and uneaten feed particles varies. The size of the filter holes in the conical filter screen 76 can be flexibly adjusted by adjusting the rotation position of the scraper 74. Simply start the servo motor 79, which drives the gear ring 73 and the scraper 74 to rotate through the drive wheel 710. The conical surface of the scraper 74 is used to block part of the filter holes on the conical filter screen 76, so that the effective flow area of ​​the filter holes can be adjusted according to the actual aquaculture needs to meet the filtration requirements of impurities of different particle sizes. Furthermore, wastewater continuously enters from the wastewater inlet cylinder 16 and constantly impacts the conical filter screen 76. Over time, this can easily cause the conical filter screen 76 to deform, thereby changing the diameter of the filter holes and affecting the filtration effect. The scraper 74, which is always in contact with the conical filter screen 76, can provide effective support for it and greatly enhance the impact resistance of the conical filter screen 76. If some areas of the conical filter screen 76 are slightly deformed due to the impact of the water flow, the servo motor 79 can be activated to drive the scraper 74 to rotate. During the rotation and contact process, the scraper 74 will physically correct the deformed area, so that the conical filter screen 76 can return to its original shape, ensuring the stability of the filter hole size and the filtration effect.

[0040] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A wastewater treatment device for aquaculture in conjunction with a land-based circular pond, comprising a treatment tank (1), wherein the inner cavity of the treatment tank (1) is divided from left to right by a partition plate (2) into a coarse filtration zone (3), a sedimentation zone (4), an aeration zone (5), and a fine filtration zone (6), characterized in that: The coarse filtration zone (3) is equipped with a coarse filtration component (7). The coarse filter assembly (7) includes a support base plate (71) bolted to the inner cavity of the coarse filter zone (3). A pressure bearing (72) is fixedly installed on the top of the support base plate (71). A gear ring (73) is fixedly installed on the upper ring of the pressure bearing (72). A plurality of evenly distributed scrapers (74) are fixedly installed on the inner circumferential surface of the gear ring (73). A circular groove is provided on the support base plate (71). A conical filter screen (76) is fixedly installed on the lower ring of the pressure bearing (72) through a filter screen mounting ring (75).

2. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 1, characterized in that: The scraper (74) is adapted to and coaxially arranged with the conical filter (76), and the outer arc surface of the scraper (74) and the inner conical surface of the conical filter (76) form a conical fit.

3. The aquaculture wastewater treatment device according to claim 1, used in conjunction with a land-based circular pond, is characterized in that: The lower end of the scraper (74) is fixedly installed with a connecting cylinder (77) that passes through the conical filter screen (76), and an impurity collection box (78) is threaded onto the connecting cylinder (77).

4. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 1, characterized in that: A servo motor (79) is fixedly mounted on the top of the support substrate (71), and a drive wheel (710) is fixedly mounted on the output end of the servo motor (79). The drive wheel (710) meshes with the gear ring (73).

5. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 1, characterized in that: The coarse filtration zone (3) and sedimentation zone (4), sedimentation zone (4) and aeration zone (5), and aeration zone (5) and fine filtration zone (6) are all connected to each other through connecting conduits (8), and pump bodies (9) are fixedly installed on the connecting conduits (8) between each adjacent zone.

6. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 5, characterized in that: A water leakage plate (10) is fixedly installed on the inner wall of the fine filtration zone (6). Several volcanic rocks are provided on the water leakage plate (10). A clean water drain pipe (11) is fixedly connected to the treatment box (1) on the side of the fine filtration zone (6). A valve is fixedly installed on the clean water drain pipe (11).

7. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 1, characterized in that: The top of the treatment box (1) is bolted to a top cover (12). The top cover (12) has a vent hole (13) on the aeration zone (5). An air pump (14) is fixedly installed on the top of the top cover (12). An air guide pipe (15) that penetrates the top cover (12) is fixedly installed at the output end of the air pump (14).

8. The aquaculture wastewater treatment device for use in conjunction with a land-based circular pond according to claim 7, characterized in that: The top of the gear ring (73) is fixedly installed with a sewage inlet cylinder (16) that penetrates the top cover (12). The inner circular surface of the sewage inlet cylinder (16) is fixedly installed with a downwardly extending conical guide hood (17). The conical guide hood (17) is coaxially arranged with the conical filter screen (76).

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