Separation and collection equipment and method based on blue-green algae resource utilization

Abstract

The invention discloses separation and collection equipment and method based on blue-green algae resource utilization, which can be continuously operated on site, accurately classify blue-green algae and recycle water resources, has strong self-cleaning capability of a filter membrane, and meets the requirements of large-scale industrial production. The equipment comprises a platform with a driving device, and a water absorption device, a conveying device, a crushing and stirring device, a classification device, a collection device, a water storage device and an identification device which are positioned on the platform, a water collection tank is arranged in the platform, the water absorption device is positioned below the platform, the outlet end of the conveying device is positioned above the crushing and stirring device, and the outlet end of the conveying device is positioned above the water storage device. The outlet end of the crushing and stirring device is connected with the inlet end of the classification device, the outlet end of the classification device is connected with the inlet end of the collection device, the outlet end of the water storage device is connected with the inlet end of the classification device, and the recognition device is connected with the collection device.

Description

Technical Field

[0001] This invention relates to the field of river and lake ecological governance technology, specifically to a separation and collection device and method based on the resource utilization of cyanobacteria. Background Technology

[0002] Cyanobacteria are a diverse group of organisms with vital ecological functions. As the foundation of the aquatic food chain, they fix carbon and energy through photosynthesis, providing food for zooplankton, shellfish, and even fish. However, when cyanobacteria are abundant, they consume large amounts of dissolved oxygen in the water. Especially at night or after cyanobacteria die, their decomposition process further and rapidly depletes oxygen, leading to severe oxygen deficiency in the water. This causes mass deaths of fish and other aquatic organisms due to suffocation, deteriorates river and lake water quality, and exacerbates eutrophication. The harvesting, resource separation, collection, and utilization of cyanobacteria have become urgent problems that need to be solved in the field of river and lake ecological management.

[0003] Spirulina, a type of cyanobacteria, is an economically valuable microalga. Its filaments typically range from 200 to 500 micrometers in length and 5 to 10 micrometers in diameter, making it suitable for wastewater treatment, biofuel production, and animal feed. Other cyanobacteria can be used to create biocomposite materials for outdoor sports equipment; these are environmentally friendly and biodegradable, possessing high commercial value. In natural or aquaculture water bodies, cyanobacteria usually aggregate in patchy, uneven clusters, containing various algae of significantly different sizes, including Spirulina. Current cyanobacteria separation technologies often employ a process of "whole-body harvesting - laboratory centrifugation - microscopic detection." While existing sorting and collection processes offer high accuracy, they suffer from cumbersome procedures, inability to achieve continuous on-site operation, non-reuse of separated wastewater, and easy clogging of filter membranes, failing to meet the requirements for resource utilization of separated cyanobacteria. Therefore, there is an urgent need in this field for a highly efficient and automated cyanobacteria resource harvesting device and method that can operate in situ in water bodies, integrating harvesting, preliminary sorting, and identification. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a separation and collection device and method based on the resource utilization of cyanobacteria in the ecological management of rivers and lakes, which can operate continuously on site, distinguish cyanobacteria, recycle water resources, and has strong self-cleaning ability of filter membrane, thus meeting the needs of resource utilization and large-scale production.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: In a first aspect, the present invention provides a separation and collection device based on the resource utilization of cyanobacteria, comprising: a platform with a driving device and a water suction device, a conveying device, a crushing and stirring device, a sorting device, a collecting device, a water storage device, and an identification device located on the platform, wherein the platform is provided with a water collection tank, the water suction device is located below the platform, the outlet end of the conveying device is located above the crushing and stirring device, the outlet end of the crushing and stirring device is connected to the inlet end of the sorting device, the outlet end of the sorting device is connected to the inlet end of the collecting device, the outlet end of the water storage device is connected to the inlet end of the sorting device, and the identification device is connected to the collecting device.

[0006] As a preferred embodiment, the water suction device includes a strip pipe, an outlet pipe, and a water pump. The end of the strip pipe facing the cyanobacteria in the water has a strip-shaped inlet, and the end facing away from the cyanobacteria in the water has an outlet. The outlet of the strip pipe and the inlet of the outlet pipe are connected. The water pump is installed in the outlet pipe. The outlet pipe or strip pipe is fixedly connected to the platform. The water collection tank contains purified water.

[0007] As a preferred embodiment, the conveying device includes a support frame, a conveyor belt, and a drive device. The drive device includes a drive wheel, a driving wheel, and a first power source. The support frame is fixedly connected to the platform, the drive wheel and the driving wheel are connected to the support frame, the conveyor belt is fitted onto the drive wheel and the driving wheel, and the first power source is connected to the drive wheel. The bottom end of the conveyor belt is located above the strip tube, and the strip tube is close to the bottom end of the conveyor belt. A V-shaped baffle is connected to the outer surface of the conveyor belt. The crushing and mixing device includes a mixing container, and an agitator and a crusher located in the mixing container. The water inlet of the mixing container is connected to the water collection tank through a pipe and a water pump. The water outlet of the mixing container is located at the top of the mixing container, and the water outlet of the mixing container is connected to the sorting device.

[0008] As a preferred embodiment, the sorting device includes a sorting container, a first filter membrane, a second filter membrane, a rotating support, and a second power source. The pore size of the first filter membrane is greater than 'a', and the pore size of the second filter membrane is 'b', where 'a' represents the maximum size of the target algae to be collected, and 'b' represents the minimum size of the target algae to be collected. The top surface of the sorting container has multiple first openings and one second opening arranged sequentially. The first filter membrane passes through one of the first openings and is detachably connected to the sorting container. The second filter membrane passes through the second opening and is detachably connected to the rotating support. The rotating support is located inside the sorting container and is rotatably connected to the sorting container. The rotating support is connected to the second power source located outside the sorting container. One end of the sorting container has a first inlet and a first outlet, and the other end has a second outlet. The top surface of the sorting container has a second inlet. The first inlet is located at the top of the sorting container, and both the first and second outlets are located at the bottom of the sorting container. The outlet of the stirring container is connected to the first inlet of the sorting container through a pipe and a first valve.

[0009] In a preferred embodiment, the collection device includes a first storage container, a second storage container, and a third storage container; the inlet of the first storage container is connected to the first outlet of the sorting container via a pipe and a third valve, and the bottom surface of the first storage container is provided with an outlet equipped with a third filter membrane; the outlet of the first storage container is opposite to the first inlet of the collection tank; the inlet of the second storage container is connected to the second outlet of the sorting container via a pipe and a fourth valve, and the bottom surface of the second storage container is provided with an outlet equipped with a fourth filter membrane; the outlet of the second storage container is opposite to the second inlet of the collection tank. The inlets of the third storage container are opposite each other; the inlet of the third storage container is connected to the second outlet of the sorting container through a pipe and a fifth valve; the bottom surface of the third storage container is provided with a first outlet; the first outlet of the third storage container is provided with a valve and a fifth filter membrane; the first outlet of the third storage container is opposite to the third inlet of the water collection tank; the lower part of the third storage container is also provided with a second outlet, which is connected to the first inlet of the sorting container through a pipe containing a sixth valve and a water pump; the third storage container is used to collect target algae; the identification device is connected to the third storage container.

[0010] As a preferred example, the water storage device includes a water storage container, a second valve, a water pump, and a water pipe. The water storage container is fixedly connected to the platform via a base, and the water storage container is connected to the water collection tank via the water pipe and the water pump. The water storage container is connected to the second water inlet of the sorting container via the second valve and the water pipe. The second water inlet is located between the second opening and the first opening closest to the second opening.

[0011] Secondly, the present invention also provides a separation and collection method based on the resource utilization of cyanobacteria, comprising: Step 1: Move the platform in the water to the area where the cyanobacteria are distributed, start the water suction device, and use the fluid power generated by the water suction device to drive the cyanobacteria in the water to the conveying device; use the conveying device to send the cyanobacteria into the crushing and stirring device; pump water from the water collection tank into the crushing and stirring device, and use the crushing and stirring device to crush and stir the cyanobacteria in the water; then send the cyanobacteria into the sorting device with the water flow. Step 2: Use a sorting device to sort the cyanobacteria. Collect the target algae into the third storage container, collect other cyanobacteria with a diameter larger than the target algae into the first storage container, and collect other cyanobacteria with a diameter smaller than the target algae into the second storage container. Step 3: Use the identification device to identify the target algae collected in the third storage container. If it meets the set requirements, the water in the third storage container is sent back to the water collection tank through the fifth filter membrane, and then the target algae in the third storage container is collected. If it does not meet the set requirements, the water and blue algae in the third storage container are transported to the sorting container through the sixth valve and water pump for re-filtration.

[0012] As a preferred example, step 2 specifically includes: The first filter membrane is passed through the first opening furthest from the rotating bracket and detachably connected to the sorting container; the second filter membrane is passed through the second opening and inserted into the rotating bracket. Open the first and fourth valves, and the water containing cyanobacteria flows from the stirring container to the sorting container. The water flows through the first and second filter membranes in sequence, and then flows into the second storage container through the fourth valve. When the set amount of cyanobacteria is collected on the surface of the second filter membrane, the first and fourth valves are closed. By rotating the support, the surface of the second filter membrane collecting cyanobacteria is oriented towards the second outlet of the sorting container. The second, third, and fifth valves are then opened. The water flow from the storage container into the sorting container is used to rinse the surfaces of the first and second filter membranes, so that the cyanobacteria trapped on the surface of the first filter membrane flows into the first storage container, and the cyanobacteria trapped on the surface of the second filter membrane flows into the third storage container.

[0013] As a preferred example, step 2 further includes: during operation, when the first filter membrane needs to be replaced, inserting the new first filter membrane into the sorting container by passing it through the first opening closest to the most recently used first filter membrane along the direction from the first outlet to the second outlet of the sorting container, and then pulling out the old first filter membrane; until all the first openings have been inserted through the first filter membrane.

[0014] As a preferred example, step 2 further includes: in the first storage container, the cyanobacteria are trapped in the first storage container through a third filter membrane, and the water flows into the water collection tank; in the second storage container, the cyanobacteria are trapped in the second storage container through a fourth filter membrane, and the water flows into the water collection tank.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: the collection equipment and method based on cyanobacteria resource utilization can greatly improve the efficiency of cyanobacteria collection. The cyanobacteria collection equipment of this invention includes a platform with a driving device, allowing the equipment to move in the water body and directly reach cyanobacteria-rich areas for in-situ harvesting, greatly improving operational flexibility and resource utilization efficiency. The platform is equipped with a water suction device, a conveying device, a crushing and stirring device, a sorting device, a collecting device, a water storage device, and an identification device. A water collection tank is provided in the platform. The water suction device is located below the platform, the outlet end of the conveying device is located above the crushing and stirring device, the outlet end of the crushing and stirring device is connected to the inlet end of the sorting device, the outlet end of the sorting device is connected to the inlet end of the collecting device, the outlet end of the water storage device is connected to the inlet end of the sorting device, and the identification device and the collecting device are arranged opposite each other. Utilizing the platform in the water body, the target algae can be identified, greatly improving work efficiency. This invention achieves on-site operation through a mobile platform, forming a "sorting-identification-collection" closed loop with the identification device, solving the problems of low efficiency and inability to accurately collect algae on-site in existing technologies. By combining size-based physical sorting with real-time image recognition technology, the accuracy of target algae and other cyanobacteria collection has been effectively improved, and quality control of the harvesting process has been achieved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram showing the connection between the second filter membrane, the rotating bracket, and the second power source in an embodiment of the present invention.

[0017] The diagram includes: platform 1, water collection tank 101, first water inlet 102, second water inlet 103, third water inlet 104, strip pipe 2, water outlet pipe 3, water pump 4, support 5, conveyor belt 6, mixing container 7, agitator 8, sorting container 9, first filter membrane 10, second filter membrane 11, rotating support 12, second power source 13, first storage container 14, second storage container 15, third storage container 16, first valve 17, second valve 18, third valve 19, fourth valve 20, fifth valve 21, identification device 22, water storage container 23, crusher 24, and sixth valve 25. Detailed Implementation

[0018] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1As shown in the figure, an embodiment of the present invention provides a separation and collection device for the resource utilization of cyanobacteria, the core of which is a platform 1 capable of traveling on water. All functional modules are integrated and installed on the platform 1, specifically including: a water suction device, a conveying device, a crushing and stirring device, a sorting device, a collection device, a water storage device, and an identification device 22. The platform 1 has a water collection tank 101. The water suction device is located below the platform 1. The outlet end of the conveying device is located above the crushing and stirring device. The outlet end of the crushing and stirring device is connected to the inlet end of the sorting device, the outlet end of the sorting device is connected to the inlet end of the collection device, the outlet end of the water storage device is connected to the inlet end of the sorting device, and the identification device 22 is connected to the collection device.

[0020] In the above embodiment, the water flow generated by the water suction device draws water to guide the floating cyanobacteria on the water surface to the conveying device. The conveying device transports the cyanobacteria in the water to the crushing and mixing device. Cyanobacteria often clump together. The crushing and mixing device breaks up and disperses the cyanobacteria more evenly in the water. Different types of cyanobacteria have different sizes, and a sorting device is used to screen cyanobacteria of different sizes. The water storage device is used to rinse the cyanobacteria filtered in the sorting device. The collection device is used to collect the different cyanobacteria filtered by the sorting device. The identification device is used to identify the type and quantity of cyanobacteria collected in the collection device. The identification device is an existing automatic plankton sorting and counting instrument. For example, the target algae to be collected is industrial spirulina. Industrial spirulina typically requires a spirulina content of more than 60% in the cyanobacteria.

[0021] The aforementioned equipment can move through water bodies, collecting algae on-site and significantly improving collection efficiency. It utilizes a water suction device to achieve hydrodynamic propulsion in the water, causing the cyanobacteria to move onto the conveyor. This equipment can operate continuously during operation.

[0022] Preferably, the water collection tank 101 is a cavity located at the bottom of the platform 1, and its area exceeds 80% of the area of ​​the platform 1. The water collection tank 101 provides a water source for the stirring container 7 and the water storage container 16. The water collection tank 101 occupies a certain space on the plane, maintaining the stability of the entire device. The water collection tank 101 is provided with overflow holes. When the water collection tank 101 accumulates a large amount of water, the water flows out through the overflow holes into the external water body. The overflow holes are located near the upper part of the water collection tank 101, and multiple overflow holes can be arranged circumferentially.

[0023] Preferably, the water absorption device includes a strip pipe 2, an outlet pipe 3, and a water pump 4. The end of the strip pipe 2 facing the cyanobacteria in the water has a strip-shaped inlet, and the end facing away from the cyanobacteria in the water has an outlet. The outlet of the strip pipe 2 is connected to the inlet of the outlet pipe 3, and the water pump 4 is installed in the outlet pipe 3. The outlet pipe 3 or the strip pipe 2 is fixedly connected to the platform 1. Preferably, the water collection tank 101 contains purified water. The purified water flows into the stirring container 7 and mixes with the cyanobacteria transported by the conveying device in the stirring container 7. The purified water flows into the water storage device for cleaning the first and second filter membranes in the sorting device.

[0024] When water pump 4 is turned on, external water flows through the strip-shaped inlet of strip pipe 2 into outlet pipe 3, and then into the water body from the outlet of outlet pipe 3. Because the strip-shaped inlet is strip-shaped and close to the bottom of the conveyor device, and strip pipe 2 is located below the cyanobacteria in the water, the cyanobacteria in the water flow with the lower water flow towards the bottom of the conveyor device and flow into the bottom surface of the conveyor device. Preferably, the length of the strip-shaped inlet of strip pipe 2 is equal to the width of conveyor belt 6 in the conveyor device. This allows as much cyanobacteria as possible to cover the surface of conveyor belt 6, improving work efficiency. Preferably, a V-shaped baffle is connected to the outer surface of conveyor belt 6. The V-shaped baffle traps the cyanobacteria on the surface of conveyor belt 6, allowing it to move with conveyor belt 6. Preferably, the conveying device includes a support 5, a conveyor belt 6, and a driving device. The driving device includes a drive wheel, a driving wheel, and a first power source. The support 5 is fixedly connected to the platform 1. The drive wheel and the driving wheel are connected to the support 5. The conveyor belt 6 is fitted onto the drive wheel and the driving wheel. The first power source is connected to the drive wheel. The bottom end of the conveyor belt 6 is located above the strip tube 2, and the strip tube 2 is close to the bottom end of the conveyor belt 6. The first power source can be an electric motor. During operation, the first power source is turned on, and the first power source drives the drive wheel to rotate, thereby driving the conveyor belt 6 and the driven wheel to rotate. The rotation of the conveyor belt 6 is used to convey cyanobacteria from the water body to the crushing and stirring device. The crushing and stirring device includes a stirring container 7, and a stirrer 8 and a crusher 24 located in the stirring container 7. The crusher 24 can be an ultrasonic crusher. The inlet of the stirring container 7 is connected to the water collection tank 101 through a pipe and a water pump. The outlet of the stirring container 7 is located at the top of the stirring container 7 and is connected to the sorting device. Because cyanobacteria tend to clump together in water, they are broken up using an ultrasonic disruptor and agitator 8, and then stirred evenly. During operation, a water pump is turned on to pump water from the collection tank 101 to the stirring container 7. Then, the disruptor 24 is activated to break the cyanobacteria into single cells (the ultrasonic disruptor's vibration frequency is preset, and microscopic examination confirms that the cyanobacteria colony has been broken into single cells). Next, the agitator 8 is activated to stir the cyanobacteria in the stirring container 7, ensuring even distribution of the cyanobacteria in the water. The outlet of the stirring container 7 is located at the top, and the water level (algal solution) in the stirring container 7 continuously rises, with the algal solution flowing out from the outlet. Throughout this process, the disruptor 24, agitator 8, water pump, and conveying device operate continuously, constantly feeding cyanobacteria into the stirring container 7. The broken and stirred cyanobacteria then flow with the water from the outlet of the stirring container 7 into the sorting device. This significantly improves work efficiency.

[0025] Preferred, such as Figure 1 and Figure 2As shown, the sorting device includes a sorting container 9, a first filter membrane 10, a second filter membrane 11, a rotating support 12, and a second power source 13. The pore size of the first filter membrane 10 is greater than 'a', and the pore size of the second filter membrane 11 is 'b', where 'a' represents the maximum size of the target algae to be collected, and 'b' represents the minimum size of the target algae to be collected. Preferably, the pore size of the first filter membrane 10 is 'a' * 105%. The top surface of the sorting container 9 has multiple first openings and one second opening arranged sequentially. The first filter membrane 10 passes through one of the first openings and is detachably connected to the sorting container 9. The second filter membrane 11 passes through the second opening and is detachably connected to the rotating support 12. The rotating support 12 is located inside the sorting container 9 and is rotatably connected to the sorting container 9. The rotating support 12 is connected to the second power source 13 located outside the sorting container 9. One end of the sorting container 9 has a first inlet and a first outlet, and the other end has a second outlet. The top surface of the sorting container 9 has a second inlet. The first inlet is located at the top of the sorting container 9. The first and second water outlets are both located at the bottom of the sorting container 9 and are arranged opposite each other. The water outlet of the stirring container 7 is connected to the first water inlet of the sorting container 9 through a pipe and the first valve 17.

[0026] In the preferred embodiment described above, the sorting device is equipped with two filter membranes with different pore sizes, including a first filter membrane 10 and a second filter membrane 11. The target algae can be filtered and collected through the first filter membrane 10 and the second filter membrane 11. Let the maximum size of the target algae be *a* micrometers and the minimum size be *b* micrometers. Then, the pore size of the first filter membrane 10 is greater than *a* micrometers, and the pore size of the second filter membrane 11 is *b* micrometers. The first filter membrane 10 can trap cyanobacteria with a size greater than or equal to *a*, while the second filter membrane 11 can trap target algae with a size between *a* and *b*. Algae smaller than *b* pass through the second filter membrane 11. The values ​​of *a* and *b* are set according to the size of the target algae, and the second filter membrane 11 traps the target algae. The first filter membrane 10 traps larger cyanobacteria, reducing their mixing with the target algae. The top surface of the sorting container 9 has multiple first openings and one second opening sequentially from the first outlet to the second outlet. The first filter membrane 10 is inserted into the sorting container 9 through the first opening. The second filter membrane 11 is inserted into the sorting container 9 through the second opening. The first filter membrane 10 is detachably connected to the sorting container 9 for easy replacement. Similarly, the second filter membrane 11 is detachably connected to the rotating bracket 12 for easy replacement. When it is necessary to change the orientation of the second filter membrane 11, the second power source 13 is activated, which drives the rotating bracket 12 to rotate, thereby causing the second filter membrane 11 located on the rotating bracket 12 to also rotate and change its orientation.

[0027] When the sorting device in the above embodiment is working, the first filter membrane 10 is inserted into the first opening closest to the first outlet of the sorting container 9, and the second filter membrane 11 is inserted into the rotating bracket 12 through the second opening. The first valve 17, the first outlet of the sorting container 9, and the fourth valve 20 are opened, and the water containing cyanobacteria flows from the stirring container 7 to the sorting container 9. The water flows through the first filter membrane 10 and the second filter membrane 11 in sequence and flows out from the first outlet of the sorting container 9.

[0028] Preferably, the collection device includes a first storage container 14, a second storage container 15, and a third storage container 16. The inlet of the first storage container 14 is connected to the first outlet of the sorting container 9 via a pipe and a third valve 19. The bottom surface of the first storage container 14 is provided with an outlet equipped with a third filter membrane. The outlet of the first storage container 14 is opposite to the first inlet hole 102 of the water collection tank 101. The inlet of the second storage container 15 is connected to the second outlet of the sorting container 9 via a pipe and a fourth valve 20. The bottom surface of the second storage container 15 is provided with an outlet equipped with a fourth filter membrane. The outlet of the second storage container 15 is opposite to the second inlet hole 103 of the water collection tank 101. The inlet of the third storage container 16 is connected to the second outlet of the sorting container 9 via a pipe and a fifth valve 21. The bottom surface of the third storage container 16 is provided with a first outlet. The first outlet of the third storage container 16 is provided with a valve and a fifth filter membrane. The first outlet of the third storage container 16 is opposite to the third inlet hole 104 of the water collection tank 101. The lower part of the third storage container 16 is also provided with a second water outlet, which is connected to the first water inlet of the sorting container 9 through a pipe containing a sixth valve 25 and a water pump. The third storage container 16 is used to collect target algae. The identification device 22 is connected to the third storage container 16 and is used to identify the type and quantity of cyanobacteria collected in the third storage container 16. Of course, the identification device 22 can also be connected to the first storage container 14 and the second storage container 15 to identify the algae collected in the first storage container 14 and the second storage container 15.

[0029] In the preferred embodiment described above, the first storage container 14, the second storage container 15, and the third storage container 16 are used to collect cyanobacteria of different sizes. The first storage container 14 is connected to the first outlet of the sorting container 9, and the second storage container 15 and the third storage container 16 are respectively connected to the second outlet of the sorting container 9. After collecting cyanobacteria, the first storage container 14 filters the algae through a third filter membrane, trapping the algae within the container, while the water flows back into the collection tank 101, thus achieving water recycling. The third filter membrane filters and traps the algae to prevent it from flowing into the collection tank 101. Similarly, after collecting cyanobacteria, the second storage container 15 filters the algae through a fourth filter membrane, trapping the algae within the container, while the water flows into the collection tank 101, achieving water recycling. The fourth filter membrane filters and traps the algae to prevent it from flowing into the collection tank 101. If the cyanobacteria collected in the third storage container 16 are identified as the target algae after identification by the identification device, the water in the third storage container 16 is returned to the collection tank 101 through the fifth filter membrane, and then the cyanobacteria in the third storage container 16 are collected. If the collected cyanobacteria do not meet the requirements for the target algae after identification by the identification device, the water and cyanobacteria in the third storage container 16 are transported to the sorting container 9 through the sixth valve 25 and the water pump for re-filtration. Filtration through the fifth filter membrane prevents the target algae from flowing into the collection tank 101.

[0030] Preferably, the water storage device includes a water storage container 23, a second valve 18, a water pump, and water pipes. The water storage container 23 is fixedly connected to the platform 1 via a base, and is connected to the water collection tank 101 via water pipes and a water pump. The water storage container 23 is connected to the second inlet of the sorting container 9 via the second valve 18 and water pipes. The second inlet is located between the second opening and the first opening closest to the second opening. The water source in the water storage device comes from the water collection tank 101. The water in the water storage device is mainly used to rinse the cyanobacteria collected on the first filter membrane 10 and the second filter membrane 11. During operation, the direction of the second filter membrane 11 is adjusted using the rotating bracket 12 so that the side of the second filter membrane 11 that traps cyanobacteria faces away from the first outlet of the sorting container 9. With the side of the first filter membrane 10 that does not trap cyanobacteria facing the side of the second filter membrane 11 that does not trap cyanobacteria, the second valve 18 is opened, allowing water to flow towards the first filter membrane 10 and the second filter membrane 11. The cyanobacteria trapped by the second filter membrane 11 are flushed away from the second filter membrane 11 and flow out with the water from the second outlet of the sorting container 9 into the third storage container 16; the cyanobacteria trapped by the first filter membrane 10 are flushed away from the first filter membrane 10 and flow out with the water from the first outlet of the sorting container 9 into the first storage container 14.

[0031] Using the aforementioned collection equipment, a separation and collection method based on cyanobacteria resource utilization is implemented, comprising the following steps: Step 1: Drive platform 1 in the water to the area where cyanobacteria are distributed, start the water suction device, and use the fluid power generated by the water suction device to drive the cyanobacteria in the water to the conveying device; use the conveying device to send the cyanobacteria into the crushing and stirring device; pump water from the water collection tank 101 into the crushing and stirring device, and use the crushing and stirring device to crush and stir the cyanobacteria in the water; then send the cyanobacteria into the sorting device with the water flow.

[0032] Step 2: Use a sorting device to sort the cyanobacteria. Collect the target algae into the third storage container 16, collect other cyanobacteria with a diameter larger than the target algae into the first storage container 14, and collect other cyanobacteria with a diameter smaller than the target algae into the second storage container 15.

[0033] Taking industrial spirulina as an example, through the above steps, spirulina is collected in the third storage container 16, other types of cyanobacteria larger than spirulina are collected in the first storage container 14, and other types of cyanobacteria smaller than spirulina are collected in the second storage container 15.

[0034] Step 3: Use the identification device 22 to identify the target algae collected in the third storage container 16. If it meets the set requirements, the water in the third storage container 16 is sent back to the water collection tank 101 through the fifth filter membrane, and then the target algae in the third storage container 16 are collected. If it does not meet the set requirements, the water and blue algae in the third storage container 16 are transported to the sorting container 9 through the sixth valve 25 and the water pump for re-filtration.

[0035] Taking industrial-grade spirulina as an example, industrial-grade spirulina requires a spirulina content greater than 60%. The spirulina is collected in a third storage container 16, and the spirulina content in the third storage container 16 is calculated using an identification device 22. If the spirulina content is greater than 60%, it is considered qualified industrial-grade spirulina. If the spirulina content is less than 60%, it is returned to the sorting device for re-sorting. The cyanobacteria collected in the first storage container 14 and the second storage container 15 can be used for various purposes based on their properties, such as bio-fertilizers and soil conditioners. In the method of the above embodiment, in step 1, the platform 1 is first driven in the water to the location where the cyanobacteria are distributed. Since the platform 1 can travel in the water, this embodiment can drive the platform 1 to the cyanobacteria aggregation site according to the distribution of cyanobacteria in the water. Then, the water suction device is activated. The water suction device draws water below the cyanobacteria aggregation site, and the resulting fluid dynamics drive the cyanobacteria above to the conveying device. The conveyor system is activated to remove the cyanobacteria from the water and transport them to the crushing and mixing device. A portion of water is pumped from the collection tank 101 into the crushing and mixing device. The crusher 24 crushes the cyanobacteria, and the agitator 8 mixes the crushed cyanobacteria with the water until they are evenly combined. The cyanobacteria in the water will clump together; the crusher 24 and agitator 8 break them up, ensuring they are evenly mixed with the water. The evenly mixed cyanobacteria is then sent to a sorting device for classification. The water flow helps to move the cyanobacteria.

[0036] In step 2, cyanobacteria are classified using a sorting device. This step classifies the cyanobacteria according to their physical size. Different sized cyanobacteria are then placed into different collection devices. Preferably, step 2 specifically includes: Step 21: Pass the first filter membrane 10 through the first opening furthest from the rotating bracket 12 and detachably connect it to the sorting container 9; pass the second filter membrane 11 through the second opening and insert it into the rotating bracket 12. Pass the first filter membrane 10 through the first opening furthest from the rotating bracket 12 and insert it into the sorting container 9. When using the first filter membrane 10 for the first time, pass the first filter membrane 10 through the first opening furthest from the rotating bracket 12. Other first openings are for subsequent replacement of other new first filter membranes. Multiple first openings are provided to allow for replacement of new first filter membranes without stopping operation.

[0037] Step 22: Open the first valve 17 and the fourth valve 20. The water containing cyanobacteria flows from the stirring container 7 to the sorting container 9. The water flows through the first filter membrane 10 and the second filter membrane 11 in sequence, and flows into the second storage container 15 from the fourth valve 20.

[0038] Step 23: When a set amount of cyanobacteria is collected on the surface of the second filter membrane 11, close the first valve 17 and the fourth valve 20. By rotating the rotating bracket 12, the surface of the second filter membrane 11 that collects cyanobacteria is facing the second outlet of the sorting container 9. Open the second valve 18, the third valve 19 and the fifth valve 21. Use the water flow from the water storage container 23 into the sorting container 9 to rinse the surfaces of the first filter membrane 10 and the second filter membrane 11. The cyanobacteria trapped on the surface of the first filter membrane 10 flows into the first storage container 14, and the cyanobacteria trapped on the surface of the second filter membrane 11 flows into the third storage container 16.

[0039] In the above method, the first filter membrane 10 is inserted into the first opening of the sorting container 9, and the second filter membrane 11 is inserted into the second opening of the sorting container 9. When water containing cyanobacteria enters the sorting container 9 from the first inlet and exits from the second outlet, the water containing cyanobacteria flows sequentially through the first filter membrane 10 and the second filter membrane 11. In this way, the cyanobacteria are separated into three different size ranges by the sorting container 9. Let the pore size of the first filter membrane 10 be *a* micrometers and the pore size of the second filter membrane 11 be *b* micrometers. Then, the first type of cyanobacteria is those with a size greater than or equal to *a* micrometers retained by the first filter membrane 10; the second type of cyanobacteria is those with a size less than *a* micrometers but greater than or equal to *b* micrometers retained by the second filter membrane 11; and the third type of cyanobacteria is those with a size less than *b* micrometers that pass through the second filter membrane 11. Through control, the first type of cyanobacteria flows into the first storage container 14, the second type flows into the third storage container 16, and the third type flows into the second storage container 15.

[0040] In step 22, the first filter membrane 10 is used to trap larger cyanobacteria. Typically, the surface of the first filter membrane 10 is blocked by cyanobacteria before the second filter membrane 11, preventing water flow. Therefore, the first filter membrane 10 needs to be replaced. To improve efficiency, preferably, step 2 further includes: during operation, when the first filter membrane 10 needs replacement, inserting a new first filter membrane into the sorting container 9 through the first opening closest to the most recently used first filter membrane, along the direction from the first outlet to the second outlet, and then pulling out the old first filter membrane; until all first openings have been pierced by the first filter membrane 10. In this preferred embodiment, replacing the first filter membrane 10 does not require stopping the equipment. The new first filter membrane is inserted into the sorting container 9 through the nearest first opening downstream of the old first filter membrane, and then the old first filter membrane is pulled out of the sorting container 9. In this way, water continues to flow from the stirring container 7 to the sorting container 9 without needing to stop the equipment to replace the new first filter membrane.

[0041] In step 23 of the above method, by rotating the rotating bracket 12, the orientation of the second filter membrane 11 is changed so that the surface of the second filter membrane 11 that traps cyanobacteria faces the second outlet of the sorting container 9, and the surface of the first filter membrane 10 that traps cyanobacteria faces the first outlet of the sorting container 9. The water flowing into the sorting container 9 through the water storage container 23 flushes the cyanobacteria trapped by the second filter membrane 11 and the first filter membrane 10 into the first storage container 14 and the third storage container 16, respectively.

[0042] Preferably, the cyanobacteria stored in the third storage container 16 are identified using the identification device 22. In this method, the target algae to be collected is a second type of cyanobacteria, namely, cyanobacteria with a size smaller than a micrometer and greater than or equal to b micrometers. The pore size of the second filter membrane is set to the diameter of the target algae to be collected, and the pore size of the first filter membrane is set to 105% of the diameter of the target algae to be collected. In this way, the target algae to be collected is obtained in the third storage container 16 by the method of the present invention. The identification device 22 is used to identify the target algae to be collected in the third storage container 16, thereby improving the accuracy. Specifically, step 3 includes: identifying the cyanobacteria collected in the third storage container 16 using the identification device 22; if the identified target algae content is greater than or equal to a threshold, the water in the third storage container 16 is returned to the water collection tank 101, and then the target algae to be collected in the third storage container 16 is collected; if the identified target algae content is less than the threshold, the water and cyanobacteria in the third storage container 16 are transported to the first inlet of the classification container 9 through the sixth valve 25 and the water pump for re-filtration. The cyanobacteria collected in the third storage container 16 may contain not only the target algae but also other types of cyanobacteria. If the proportion of the target algae in the third storage container 16 is greater than a threshold, for example, a threshold of 60%, then the target algae collected in the third storage container 16 are considered as meeting the requirements for collection. If the proportion of the target algae in the third storage container 16 is less than the threshold, then the cyanobacteria and water in the third storage container 16 are transferred to the sorting container 9 for re-filtration.

[0043] Preferably, step 2 further includes: in the first storage container 14, cyanobacteria are trapped in the first storage container 14 through a third filter membrane, and water flows into the water collection tank 101; in the second storage container 15, cyanobacteria are trapped in the second storage container 15 through a fourth filter membrane, and water flows into the water collection tank 101. The water flowing into the first storage container 14 and the second storage container 15 originates from the water collection tank 101 and flows back into the water collection tank 101 through the third and fourth filter membranes, realizing water recycling. The cyanobacteria collected in the first storage container 14 and the second storage container 15 can be collected and utilized separately.

[0044] The equipment and methods described in the above embodiments and preferred examples utilize a platform equipped with a travel device to move in water, enabling continuous on-site operation. Precise classification of cyanobacteria is achieved through a crushing and stirring device, a sorting device, a collection device, and an identification device. Water resources in the collection tank are recycled through three water inlets located in the first, second, and third storage containers and the collection tank. Self-cleaning of the first filter membrane 10 and the second filter membrane 11 is achieved through the water storage containers and the rotating support. This equipment can meet the needs of large-scale industrial production.

[0045] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A separation and collection device based on the resource utilization of cyanobacteria, characterized in that, The equipment includes: a platform (1) with a driving device and a water suction device, a conveying device, a crushing and stirring device, a sorting device, a collecting device, a water storage device and an identification device (22) located on the platform (1). The platform (1) is provided with a water collection tank (101). The water suction device is located below the platform (1). The outlet end of the conveying device is located above the crushing and stirring device. The outlet end of the crushing and stirring device is connected to the inlet end of the sorting device. The outlet end of the sorting device is connected to the inlet end of the collecting device. The outlet end of the water storage device is connected to the inlet end of the sorting device. The identification device (22) is connected to the collecting device.

2. The separation and collection device based on cyanobacteria resource utilization according to claim 1, characterized in that, The water suction device includes a strip pipe (2), an outlet pipe (3), and a water pump (4). The end of the strip pipe (2) facing the blue-green algae in the water is provided with a strip-shaped inlet, and the end facing away from the blue-green algae in the water is provided with an outlet. The outlet of the strip pipe (2) is connected to the inlet of the outlet pipe (3), and the water pump (4) is installed in the outlet pipe (3). The outlet pipe (3) or the strip pipe (2) is fixedly connected to the platform (1). The water collection tank (101) is filled with pure water.

3. The separation and collection device based on cyanobacteria resource utilization according to claim 2, characterized in that, The conveying device includes a support (5), a conveyor belt (6), and a drive device. The drive device includes a drive wheel, a drive wheel, and a first power source. The support (5) is fixedly connected to the platform (1). The drive wheel and the drive wheel are connected to the support (5). The conveyor belt (6) is fitted onto the drive wheel and the drive wheel. The first power source is connected to the drive wheel. The bottom end of the conveyor belt (6) is located above the strip tube (2), and the strip tube (2) is close to the bottom end of the conveyor belt (6). A V-shaped baffle is connected to the outer surface of the conveyor belt (6). The crushing and mixing device includes a mixing container (7), a stirrer (8) and a crusher (24) located in the mixing container (7). The inlet of the mixing container (7) is connected to the water collection tank (101) through a pipe and a water pump. The outlet of the mixing container (7) is located at the top of the mixing container (7). The outlet of the mixing container (7) is connected to the sorting device.

4. The separation and collection device based on cyanobacteria resource utilization according to claim 1, characterized in that, The sorting device includes a sorting container (9), a first filter membrane (10), a second filter membrane (11), a rotating support (12), and a second power source (13). The pore size of the first filter membrane (10) is greater than a, and the pore size of the second filter membrane (11) is b. a represents the maximum size of the target algae to be collected, and b represents the minimum size of the target algae to be collected. The top surface of the sorting container (9) is provided with a plurality of first openings and a second opening in sequence; a first filter membrane (10) passes through one of the first openings and is detachably connected to the sorting container (9); a second filter membrane (11) passes through the second opening and is detachably connected to the rotating bracket (12); the rotating bracket (12) is located in the sorting container (9) and is rotatably connected to the sorting container (9); the rotating bracket (12) is connected to a second power source (13) located outside the sorting container (9); The sorting container (9) has a first inlet and a first outlet at one end, a second outlet at the other end, and a second inlet on the top surface of the sorting container (9); the first inlet is located at the top of the sorting container (9), and the first outlet and the second outlet are both located at the bottom of the sorting container (9); The outlet of the mixing container (7) is connected to the first inlet of the sorting container (9) via a pipe and a first valve (17).

5. The separation and collection device based on cyanobacteria resource utilization according to claim 4, characterized in that, The collection device includes a first storage container (14), a second storage container (15), and a third storage container (16); the inlet of the first storage container (14) is connected to the first outlet of the sorting container (9) through a pipe and a third valve (19); the bottom surface of the first storage container (14) is provided with an outlet with a third filter membrane; the outlet of the first storage container (14) is opposite to the first inlet (102) of the water collection tank (101); The inlet of the second storage container (15) is connected to the second outlet of the sorting container (9) through a pipe and a fourth valve (20). The bottom surface of the second storage container (15) is provided with an outlet with a fourth filter membrane. The outlet of the second storage container (15) is opposite to the second inlet (103) of the water collection tank (101). The inlet of the third storage container (16) is connected to the second outlet of the sorting container (9) through a pipe and a fifth valve (21). The bottom surface of the third storage container (16) is provided with a first outlet. The first outlet of the third storage container (16) is provided with a valve and a fifth filter membrane. The first outlet of the third storage container (16) is opposite to the third inlet (104) of the water collection tank (101). The lower part of the third storage container (16) is also provided with a second outlet. The second outlet is connected to the first inlet of the sorting container (9) through a pipe containing a sixth valve (25) and a water pump. The third storage container (16) is used to collect target algae. The identification device (22) and the third storage container (16) are connected.

6. The separation and collection device based on cyanobacteria resource utilization according to claim 4, characterized in that, The water storage device includes a water storage container (23), a second valve (18), a water pump and a water pipe. The water storage container (23) is fixedly connected to the platform (1) via a base, and the water storage container (23) is connected to the water collection tank (101) via the water pipe and the water pump. The water storage container (23) is connected to the second inlet of the sorting container (9) via the second valve (18) and the water pipe. The second inlet is located between the second opening and the first opening closest to the second opening.

7. A separation and collection method based on the resource utilization of cyanobacteria, characterized in that, The method includes: Step 1: Drive the platform in the water to the water where the cyanobacteria are distributed, start the water suction device, and use the fluid power generated by the water suction device to drive the cyanobacteria in the water to the conveying device; use the conveying device to send the cyanobacteria into the crushing and stirring device; pump water from the water collection tank (101) into the crushing and stirring device, and use the crushing and stirring device to crush and stir the cyanobacteria in the water; then send the cyanobacteria into the sorting device with the water flow. Step 2: Use a sorting device to sort the cyanobacteria, collect the target algae into the third storage container (16), collect other cyanobacteria with a diameter larger than the target algae into the first storage container (14), and collect other cyanobacteria with a diameter smaller than the target algae into the second storage container (15). Step 3: Use the identification device (22) to identify the target algae collected in the third storage container (16). If it meets the set requirements, the water in the third storage container (16) is sent back to the water collection tank (101) through the fifth filter membrane, and then the target algae in the third storage container (16) is collected. If it does not meet the set requirements, the water and blue algae in the third storage container (16) are transported to the classification container (9) through the sixth valve (25) and water pump for re-filtration.

8. The separation and collection method based on cyanobacteria resource utilization according to claim 7, characterized in that, Step 2 specifically includes: The first filter membrane (10) is detachably connected to the sorting container (9) by passing through the first opening furthest from the rotating bracket (12); the second filter membrane (11) is inserted into the rotating bracket (12) by passing through the second opening. Open the first valve (17) and the fourth valve (20), and the water containing cyanobacteria flows from the stirring container (7) to the sorting container (9). The water flows through the first filter membrane (10) and the second filter membrane (11) in sequence, and flows into the second storage container (15) from the fourth valve (20). When a set amount of cyanobacteria is collected on the surface of the second filter membrane (11), the first valve (17) and the fourth valve (20) are closed. By rotating the rotating bracket (12), the surface of the second filter membrane (11) that collects cyanobacteria is made to face the second outlet of the sorting container (9). The second valve (18), the third valve (19) and the fifth valve (21) are opened. The water flowing from the water storage container (23) into the sorting container (9) is used to rinse the surfaces of the first filter membrane (10) and the second filter membrane (11), so that the cyanobacteria trapped on the surface of the first filter membrane (10) flows into the first storage container (14) and the cyanobacteria trapped on the surface of the second filter membrane (11) flows into the third storage container (16).

9. The separation and collection method based on cyanobacteria resource utilization according to claim 8, characterized in that, Step 2 also includes: During operation, when the first filter membrane (10) needs to be replaced, the new first filter membrane is inserted into the sorting container (9) through the first opening closest to the most recently used first filter membrane, along the direction from the first outlet to the second outlet of the sorting container (9), and then the old first filter membrane is pulled out; until all the first openings have been inserted through the first filter membrane (10).

10. The separation and collection method based on cyanobacteria resource utilization according to claim 8, characterized in that, Step 2 also includes: In the first storage container (14), the cyanobacteria are trapped in the first storage container (14) by the third filter membrane, and the water flows into the water collection tank (101); In the second storage container (15), the blue algae are trapped in the second storage container (15) through the fourth filter membrane, and the water flows into the water collection tank (101).

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