Apparatus and method for microalgae-microorganism synergistic treatment of aquaculture effluent

Abstract

The present invention relates to the technical field of aquaculture effluent treatment, in particular to an apparatus for microalgae-microorganism synergistic treatment of aquaculture effluent. The apparatus comprises an aquaculture part; the aquaculture part is in communication with an effluent discharge part; the effluent discharge part is in communication with an effluent treatment part; and the effluent treatment part is in communication with the aquaculture part. The effluent discharge part comprises an effluent discharge pipe in communication with the aquaculture part; the end of the effluent discharge pipe away from the aquaculture part is in communication with the effluent treatment part; and an effluent discharge pump is arranged on the effluent discharge pipe. The effluent treatment part comprises a second housing; the bottom end of the second housing is in communication with the effluent discharge pipe; the top end of a side wall of the second housing is in communication with the aquaculture part; the interior of the second housing is provided with a plurality of flow guide plates; and microalgae are inoculated on outer side walls of the flow guide plates. In the present invention, microalgae and original microorganisms in aquaculture effluent form microalgae-microorganism symbionts, which can reduce carbon, reduce nitrogen and remove phosphorus synchronously and have few effects on aquaculture organisms, so that the quality of discharged water can be greatly improved without the need of subsequent precipitation devices.

Description

Device and method for collaborative treatment of aquaculture tail water by algae and fungi Technical Field

[0001] The present invention relates to the technical field of aquaculture tail water treatment, and in particular to equipment and a method for collaboratively treating aquaculture tail water with algae and fungi. Background Art

[0002] During or after aquaculture, the tailwater discharged from the aquaculture system (including aquaculture ponds, nursery ponds, factory workshops, etc.) often contains large amounts of carbon, nitrogen, phosphorus and other elements, which leads to eutrophication of water bodies and even soil, not only polluting the natural environment, but also affecting production and life. Similar to other types of wastewater, aquaculture tailwater treatment methods can be roughly divided into three categories: physical, chemical and biological. General methods include flocculation, sedimentation, filtration or adsorption. In actual life, a combination of different methods is often used, and nutrient-rich elements are converted or absorbed and utilized. With the increasing intensification and industrialization of aquaculture, the breeding density and feeding amount have greatly increased. How to solve the resulting residual bait and feces pollution has become a key issue in the treatment of aquaculture tailwater.

[0003] Traditional technologies, including filtration ponds, sedimentation tanks, constructed wetlands, algae ponds, and ecological ditches, suffer from inefficient treatment and high labor and material costs. For example, the "three ponds, two dams" process for ecological treatment of pond aquaculture tailwater involves six steps: ecological ditch → sedimentation pond → filtration dam → aeration pond → filtration dam → ecological purification pond. This is cumbersome and requires significant floor space. Furthermore, some new technologies also have drawbacks. For example, photocatalytic oxidation methods suffer from difficulty in catalyst recovery and low light energy utilization; and denitrification using charged microbial trickling filters remains unsatisfactory.

[0004] It is worth noting that in addition to being used as a raw material for biomass energy production, microalgae also exhibit excellent properties in water purification. By constructing an algae-bacteria symbiosis, complementary advantages can be formed to synergize water purification and improve water purification efficiency. Algae release oxygen through photosynthesis to supply aerobic heterotrophic microorganisms for metabolic activities, while aerobic microorganisms oxidize and decompose organic pollutants. The metabolic products, carbon dioxide, inorganic nitrogen, and phosphorus compounds, provide algae as a carbon source and nutrition required for photosynthesis. This cycle forms a mutualistic relationship between bacteria and algae. Therefore, a device and method for the collaborative treatment of aquaculture tail water by algae and bacteria is provided.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide an apparatus and method for collaboratively treating aquaculture tail water with algae and fungi to solve the above-mentioned problems.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] An algae-bacteria collaborative aquaculture tailwater treatment device comprises: an aquaculture section, the bottom of the aquaculture section is connected to one end of a sewage discharge section, the other end of the sewage discharge section is connected to the bottom of a tailwater treatment section, and the upper side wall of the tailwater treatment section is connected to the upper side wall of the aquaculture section;

[0009] The sewage discharge part includes a sewage discharge pipe connected to the bottom of the aquaculture part, one end of the sewage discharge pipe away from the aquaculture part is connected to the bottom of the tail water treatment part, and a sewage discharge pump is provided on the sewage discharge pipe;

[0010] The tail water treatment part includes a second shell, the bottom end of the second shell is connected to the sewage pipe, the top end of the side wall of the second shell is connected to the upper part of the side wall of the aquaculture part, and several guide plates are arranged in the second shell, and the outer side walls of the guide plates are inoculated with microalgae.

[0011] Preferably, the aquaculture section includes a first shell, a first liquid level controller is provided in the first shell, a first sensor assembly is fixedly installed on the inner wall of the first shell, the bottom end of the first shell is connected to at least one sewage collecting tank, and the bottom end of the sewage collecting tank is connected to the sewage pipe.

[0012] Preferably, an ecological bed matrix layer and an anti-escape net are sequentially arranged in the sewage collection tank from top to bottom. The anti-escape net is fixed to the inner wall of the sewage collection tank and arranged horizontally. The ecological bed matrix layer is placed above the anti-escape net.

[0013] Preferably, the guide plates are all fixedly connected to the inner side wall of the second shell, the guide plates are arranged in parallel with each other, the guide plates are arranged vertically, and the side walls of the guide plates are not in contact with the inner side wall of the second shell.

[0014] Preferably, a plurality of light-emitting strips are fixedly connected to the outer wall of the guide plate, and the light-emitting strips are arranged in sequence at intervals. The light-emitting strips are vertically arranged, and a plurality of small holes are provided between two adjacent light-emitting strips. The small holes are opened on the guide plate and pass through the guide plate, and the small holes are arranged in sequence at intervals from top to bottom. A plurality of films are laid on the outer wall of the guide plate, and the films are located between two adjacent light-emitting strips, and the films do not cover the small holes.

[0015] Preferably, a second liquid level controller is provided in the second shell, a second sensor assembly is fixedly mounted on the inner side wall of the second shell, a flow meter is fixedly mounted on the inner side wall of the second shell, a return pipe is fixedly connected to and connected to the side wall of the second shell, the return pipe is located at the top end of the second shell, the end of the return pipe away from the second shell extends into the first shell, a return valve is provided on the return pipe, the end of the return pipe extending into the first shell is located above the first liquid level controller, the other end of the return pipe is located below the second liquid level controller, and the flow meter is close to the end of the return pipe.

[0016] Preferably, a mud discharge pipe is fixedly connected to and communicated with the outer side wall of the second shell, the mud discharge pipe is located at the bottom end of the second shell, and a mud discharge valve is provided on the mud discharge pipe.

[0017] Preferably, the top end of the second shell is detachably connected to a top rotary cover, and the top rotary cover is fixedly connected to and connected to an exhaust valve.

[0018] Preferably, a gas-liquid ejector is provided below the second shell, the gas-liquid ejector is communicated with the sewage pipe, and the gas-liquid ejector is located between the sewage pump and the second shell.

[0019] A method for collaboratively treating aquaculture tail water with algae and fungi comprises the following steps:

[0020] S1. Determine the aquaculture species, place them in the aquaculture device for breeding, and build an aquaculture area;

[0021] S2. Determine the type of water-purifying algae, place them in the tailwater treatment device, and construct a tailwater treatment area;

[0022] S3, the aquaculture tail water is introduced into the second shell through the sewage pipe, and the microalgae on the guide plate cooperate with the microorganisms in the aquaculture tail water to treat the aquaculture tail water;

[0023] S4. The treated clean water is returned to the aquaculture device.

[0024] The present invention has the following technical effects:

[0025] In the present invention, aquaculture organisms are cultured in the aquaculture section, and the aquaculture tail water in the aquaculture section is sent into the second shell by a sewage pump through a sewage pipe. The guide plate in the second shell is inoculated with microalgae. The microalgae and the original microorganisms in the aquaculture tail water form an algae-bacteria symbiosis, which can simultaneously reduce carbon, nitrogen and phosphorus, and has little impact on aquaculture organisms. The water quality of the effluent can be greatly improved without a subsequent sedimentation device. The sewage pump is used to promote the circulation of water quality, and the guide plate is used to improve the fluidity and stability of the algae-bacteria reaction liquid, thereby achieving quality improvement and efficiency enhancement of aquaculture tail water treatment. At the same time, aquaculture and microalgae cultivation are coupled, and the co-cultivation of fish, algae and bacteria is achieved through the recycling of aquaculture tail water. Not only can fish be caught, but microalgae can also be recycled and utilized, which adds economic benefits and realizes the resource utilization of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 is a schematic structural diagram of the present invention;

[0028] FIG2 is a front view of the guide plate of the present invention;

[0029] FIG3 is a top view of the first housing of the present invention;

[0030] FIG4 is a schematic flow chart of a method for co-processing aquaculture tail water with algae and fungi according to the present invention;

[0031] FIG5 is a schematic diagram showing the connection of functional devices in the present invention;

[0032] Among them, 1. the first shell; 2. the first liquid level controller; 3. the first sensor assembly; 4. the sewage collection tank; 5. the ecological bed matrix layer; 6. the anti-escape net; 7. the sewage pipe; 8. the sewage pump; 9. the gas-liquid ejector; 10. the mud discharge pipe; 11. the mud discharge valve; 12. the second shell; 13. the second sensor assembly; 14. the guide plate; 16. the second liquid level controller; 17. the top screw cap; 18. the exhaust valve; 19. the flow meter; 20. the return valve; 21. the return pipe; 22. the solar photovoltaic panel; 14-1. the membrane; 14-2. the light strip; 14-3. the small hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] 1-5 , this embodiment provides an apparatus for collaboratively treating aquaculture tailwater with algae and fungi, comprising: an aquaculture section, the bottom of the aquaculture section being connected to one end of a sewage discharge section, the other end of the sewage discharge section being connected to the bottom of a tailwater treatment section, and the upper sidewall of the tailwater treatment section being connected to the upper sidewall of the aquaculture section;

[0036] The sewage discharge part includes a sewage discharge pipe 7 connected to the bottom of the aquaculture part. One end of the sewage discharge pipe 7 away from the aquaculture part is connected to the bottom of the tail water treatment part. A sewage pump 8 is provided on the sewage discharge pipe 7.

[0037] The tailwater treatment part includes a second shell 12, the bottom end of the second shell 12 is connected to the sewage pipe 7, the top end of the side wall of the second shell 12 is connected to the upper part of the side wall of the aquaculture part, and a number of guide plates 14 are arranged in the second shell 12, and the outer wall of the guide plate 14 is inoculated with microalgae.

[0038] In the present invention, aquaculture organisms are cultured in the aquaculture section, and the aquaculture tail water in the aquaculture section is sent into the second shell 12 by the sewage pump 8 through the sewage pipe 7. The guide plate 14 in the second shell 12 is inoculated with microalgae. The microalgae and the original microorganisms in the aquaculture tail water form an algae-bacteria symbiosis, thereby treating the aquaculture tail water, and then the treated water is re-entered into the aquaculture section.

[0039] A further optimized solution is that the aquaculture section includes a first shell 1, in which a first liquid level controller 2 is provided, a first sensor assembly 3 is fixedly mounted on the inner wall of the first shell 1, and the bottom end of the first shell 1 is connected to at least one sewage collecting tank 4, the bottom end of which is connected to a sewage pipe 7. The water level in the first shell 1 is controlled by the first liquid level controller 2, and the water body data in the first shell 1 (water body data includes but is not limited to water body temperature, dissolved oxygen in the water body, water body turbidity, and ammonia nitrogen content in the water body) is monitored by the first sensor assembly 3, and the data is transmitted to the PLC controller. When the water body data in the first shell 1 reaches the set value, the sewage pump 8 is controlled by the PLC controller to start, and the aquaculture tail water is passed into the second shell 12 for treatment. A solar photovoltaic panel 22 is also provided above the first shell 1, which converts solar energy into electrical energy and stores it in a battery, providing all or part of the electrical energy for the device. The bottom of the first housing 1 is preferably configured as a rectangle, with floor drains provided at the four corners and the middle of the bottom of the first housing 1. A fan blade is rotatably connected within the floor drain, and a motor is connected to the fan blade drive. The motor is electrically connected to the PLC controller and is used to deliver the aquaculture tailwater within the first housing 1 into the sump 4. The aquaculture tailwater at different locations is evenly flowed to the sump 4 through the floor drain, and then enters the second housing 12 for treatment, ensuring the circulation effect of the aquaculture tailwater. The preferred model of the first liquid level controller 2 is ZX / CYH0-LTC1000-5-3-L.

[0040] In a further optimization scheme, an eco-bed matrix layer 5 and an anti-escape net 6 are sequentially arranged from top to bottom within the sump 4. The anti-escape net 6 is fixed to the inner sidewall of the sump 4 and arranged horizontally, with the eco-bed matrix layer 5 placed above the anti-escape net 6. The eco-bed matrix layer 5 has a loose structure and will not clog the anti-escape net 6. At the same time, the eco-bed matrix layer 5 will not pass through the anti-escape net 6. The eco-bed matrix layer 5 is preferably natural zeolite or gravel, which is used to initially treat ammonia nitrogen, total nitrogen, and total phosphorus in the aquaculture tailwater, helping to prevent nitrification reactions within the second shell 12 and prevent the accumulation of nitrites within the second shell 12, which affects the stability of the circulation system. The anti-escape net 6 prevents aquatic animals from being sucked into the second shell 12 and can also filter out large impurities.

[0041] In a further optimized solution, a plurality of guide plates 14 are fixed to the inner sidewall of the second shell 12, and the guide plates 14 are arranged parallel to each other and vertically, with the sidewalls of the guide plates 14 not in contact with the inner sidewall of the second shell 12. The parallel arrangement of the plurality of guide plates 14 allows water, driven by the sewage pump 8, to flow through the gaps between the guide plates 14 and toward the top of the second shell 12. The water then flows through the gaps between the guide plates 14 and the inner sidewall of the second shell 12 toward the bottom of the second shell 12, thereby increasing the tailwater treatment rate.

[0042] A further optimization scheme is provided, in which a plurality of light-emitting strips 14-2 are fixedly connected to the outer wall of the guide plate 14, and the plurality of light-emitting strips 14-2 are arranged in sequence at intervals. The light-emitting strips 14-2 are vertically arranged, and a plurality of small holes 14-3 are provided between two adjacent light-emitting strips 14-2. The small holes 14-3 are opened on the guide plate 14 and pass through the guide plate 14. The plurality of small holes 14-3 are arranged in sequence at intervals from top to bottom, and a plurality of films 14-1 are laid on the outer wall of the guide plate 14. The film 14-1 is located between two adjacent light-emitting strips 14-2, and the film 14-1 does not cover the small holes 14-3.

[0043] The material of membrane 14-1 can be polyvinylidene fluoride (PVDF) membrane or non-woven biofilm, the material of guide plate 14 is preferably PVC plate, stainless steel plate or glass plate, the small hole 14-3 can improve the fluidity of the algae-bacteria symbiotic system, and the light strip 14-2 provides lighting conditions for the normal physiological activities of the algae-bacteria symbiotic system, thereby ensuring the water purification effect.

[0044] A further optimized solution is provided in the second shell 12. A second liquid level controller 16 is fixedly installed on the inner wall of the second shell 12. A flow meter 19 is fixedly installed on the inner wall of the second shell 12. A return pipe 21 is fixedly connected to and connected to the side wall of the second shell 12. The return pipe 21 is located at the top end of the second shell 12. The end of the return pipe 21 away from the second shell 12 extends into the first shell 1. A return valve 20 is provided on the return pipe 21. The end of the return pipe 21 extending into the first shell 1 is located above the first liquid level controller 2, and the other end of the return pipe 21 is located below the second liquid level controller 16. The flow meter 19 is close to the end of the return pipe 21. The second sensor assembly 13 is used to monitor water data within the second housing 12, the second liquid level controller 16 is used to control the water level within the second housing 12, and the flowmeter 19 is used to monitor the water flow into the first housing 1. The end of the return pipe 21 extending into the first housing 1 is located above the first liquid level controller 2, that is, the end of the return pipe 21 extending into the first housing 1 is above the water surface, and the other end of the return pipe 21 is located below the second liquid level controller 16, that is, the other end of the return pipe 21 extends into the second housing 12 and is located below the water level. In this way, there is a difference between the water levels in the second housing 12 and the first housing 1, allowing the treated tail water to flow smoothly from the second housing 12 to the first housing 1, which is beneficial to the stability of the aquaculture tail water circulation treatment process and reduces the energy consumption of the water pump. The preferred model of the second liquid level controller 16 is ZX / CYH0-LTC1000-5-3-L.

[0045] Further optimizing the solution, a mud discharge pipe 10 is fixedly connected to and communicated with the outer wall of the second shell 12. The mud discharge pipe 10 is located at the bottom end of the second shell 12 and is provided with a mud discharge valve 11. The sludge deposited in the second shell 12 is discharged outside the second shell 12 through the mud discharge pipe 10.

[0046] Further optimizing the solution, the top of the second shell 12 is detachably connected to a top screw cap 17, and the top screw cap 17 is fixedly connected and connected to an exhaust valve 18. Such an arrangement facilitates the addition of liquid, exhaust and cleaning of the second shell 12.

[0047] To further optimize the solution, a gas-liquid ejector 9 is provided below the second shell 12. The gas-liquid ejector 9 is connected to the sewage pipe 7 and is located between the sewage pump 8 and the second shell 12. Before the aquaculture tail water enters the second shell 12, it first passes through the gas-liquid ejector 9, which then introduces air into the sewage pipe 7, causing the air and the aquaculture tail water to be vigorously mixed. At the same time, the gas-liquid ejector 9 can be used to replenish the liquid in the second shell 12.

[0048] A method for collaboratively treating aquaculture tail water with algae and fungi comprises the following steps:

[0049] S1. Determine the aquaculture species, place them in the aquaculture device for breeding, and build an aquaculture area;

[0050] S2. Determine the type of water-purifying algae, place them in the tailwater treatment device, and construct a tailwater treatment area;

[0051] S3, the aquaculture tail water is introduced into the second housing 12 through the sewage pipe 7, and the microalgae on the guide plate 14 cooperates with the microorganisms in the aquaculture tail water to treat the aquaculture tail water;

[0052] S4. The treated clean water is returned to the aquaculture device.

[0053] The specific steps are as follows:

[0054] Determine the aquaculture species, place them in aquaculture equipment for breeding, and construct aquaculture areas;

[0055] Determine the type of water-purifying algae, place them in the tailwater treatment device, and construct the tailwater treatment area;

[0056] The aquaculture tail water is filtered through the sewage collection tank at the bottom of the aquaculture area and then discharged into the sewage discharge device;

[0057] The filtered aquaculture tail water is discharged to the gas-liquid ejector through the sewage discharge device;

[0058] The aquaculture tail water is mixed vigorously with air in the gas-liquid ejector and then discharged to the tail water treatment area;

[0059] The aquaculture tail water mixed with air is directed upwards into the center of the first guide plate and the second guide plate by the gas-liquid ejector, and then flows downwards from the outer sides of the first guide plate and the second guide plate to form a circular flow, thereby treating the aquaculture tail water;

[0060] The treated aquaculture tail water is regularly discharged into the aquaculture device through the return water device.

[0061] In this equipment, the first liquid level controller 2, the first sensor assembly 3, the sewage pump 8, the gas-liquid ejector 9, the mud discharge valve 11, the second sensor assembly 13, the second liquid level controller 16, the exhaust valve 18, the flow meter 19, the return valve 20 and the light bar 14-2 are all electrically connected to the PLC controller, and the first liquid level controller 2, the first sensor assembly 3, the sewage pump 8, the gas-liquid ejector 9, the mud discharge valve 11, the second sensor assembly 13, the second liquid level controller 16, the exhaust valve 18, the flow meter 19, the return valve 20 and the light bar 14-2 are all electrically connected to the battery.

[0062] This device couples a membrane photobioreactor with an airlift reactor, using the membrane as a carrier. Newly inoculated microalgae and pre-existing microorganisms in the aquaculture tailwater form an algae-bacteria symbiosis. This device offers advantages such as simultaneous carbon, nitrogen, and phosphorus reduction, minimal impact on aquaculture organisms, and significantly improved effluent quality without the need for subsequent sedimentation equipment. A novel guide plate improves the fluidity and stability of the algae-bacteria reaction solution, and the addition of wastewater extraction points promotes water circulation, ultimately enhancing the quality and efficiency of aquaculture tailwater treatment.

[0063] By coupling aquaculture and microalgae cultivation, the co-cultivation of fish, algae and bacteria is achieved through the recycling of aquaculture tail water. Not only can fish be caught, but microalgae can also be recycled and utilized, adding economic benefits and realizing the resource utilization of wastewater.

[0064] Discharging water through head differentials not only improves the stability of the diversion process but also reduces pump energy consumption. Solar photovoltaic panels installed above the aquaculture area provide shade for the system and conserve energy, achieving a "fish-solar complementarity" approach. Solar energy can fully or partially replace traditional electricity, contributing to energy conservation and environmental protection.

[0065] This solution greatly improves the automation level of the existing system, saves manpower and material resources, and is conducive to large-scale application.

[0066] A test example of the present invention

[0067] The aquaculture animals that can be selected for this device include fish, shellfish, shrimp, crabs, etc. The solar photovoltaic panel 22 can be activated in advance and maintain a long-term working state. The normal operating parameter range of the first liquid level controller 2 and the first sensor assembly 3 is pre-set based on known parameters, and aquaculture species and feed are released.

[0068] Determine the water purification algae species and expand the culture, purification and domestication in advance. Optional algae species include Haematococcus pluvialis, Scenedesmus filamentosa, Chlorella vulgaris and Spirulina platensis. Set the working cycle of the light strip 14-2, the gas-liquid ejector 9 and the return valve 20.

[0069] A second liquid level controller 16 is provided to ensure that the liquid level in the second shell 12 is always higher than the return valve 20, so that after the return valve 20 is opened, the liquid in the aquaculture tail water treatment area can be automatically discharged under the action of the water level difference without the need for additional power. Ensuring the water level difference can also make the algae-bacteria reaction liquid flow evenly and the reaction system more stable.

[0070] The top screw cap 17 is opened and the expanded, purified and domesticated algae species are introduced into the aquaculture tailwater treatment area at a predetermined inoculation concentration, and then the top screw cap 17 is closed. Preferably, the inoculation concentration of Spirulina platensis is at least 0.12 g / L.

[0071] Start the floor drain, sewage pump 8 and gas-liquid ejector 9 in sequence.

[0072] The aquaculture tail water flows through the floor drain in turn; it is preliminarily purified on the ecological bed matrix layer 5 of the sewage collection tank 4; then it is filtered through the anti-escape net 6; through the sewage pipe 7 to the sewage pump 8, the sewage pump 8 can physically decompose fibrous dirt, silt and solid particles with a particle size within a set range; then through the sewage pipe 7 to the gas-liquid ejector 9, the aquaculture tail water and the air sucked into the internal structure of the gas-liquid ejector 9 are violently mixed, and the gas-liquid mixture is discharged upward along the gas-liquid ejector 9; after passing between several guide plates 14, it flows downward along the gap between the guide plate 14 and the inner wall of the second shell 12, forming a circular flow.

[0073] The return valve 20 is opened at a set time, and the liquid in the aquaculture tail water treatment area flows to the first shell 1 through the return pipe 21, and the return valve 20 is closed at a set time.

[0074] Open the mud discharge valve 11 according to the set time to harvest the microalgae mud.

[0075] The present invention provides an apparatus and method for the coordinated algae-bacteria treatment of aquaculture tailwater. During the initial reaction phase of the aquaculture tailwater treatment area, a light strip 14-2 can be installed for continuous illumination, while a gas-liquid ejector 9 can be installed for continuous aeration to rapidly circulate the culture medium components. Subsequently, the floor drain and sewage pump 8 are opened. The operating hours and cycles of the gas-liquid ejector 9 and light strip 14-2 can be adjusted based on the specific characteristics of the microalgae-based water purification process. This ensures coordinated algae-bacteria growth and water purification while conserving energy.

[0076] Among them, algae release oxygen through photosynthesis to supply aerobic heterotrophic microorganisms for metabolic activities. Aerobic microorganisms oxidize and decompose organic pollutants. The metabolic products carbon dioxide, inorganic nitrogen, and phosphorus compounds provide the algae with the carbon source and nutrients required for photosynthesis. When the flow meter 19 shows that the water flow is stable, the working cycle of the return valve 20 and the mud valve 11 is reset. In addition, the exhaust valve 18 needs to be set to release air regularly to prevent the accumulation of nitrite in the aquaculture tailwater treatment area.

[0077] The present invention enables automated recycling of aquaculture tailwater by presetting the relevant parameters of the aquaculture zone and tailwater purification zone. This significantly reduces total nitrogen, total phosphorus, and ammonia nitrogen in tailwater, improving eutrophication and ensuring water quality meets recycling aquaculture requirements or discharge standards.

[0078] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0079] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A device for collaborative treatment of aquaculture tail water by algae and fungi, characterized in that: include: an aquaculture section, wherein the bottom of the aquaculture section is connected to one end of a sewage discharge section, the other end of the sewage discharge section is connected to the bottom of a tailwater treatment section, and the upper side wall of the tailwater treatment section is connected to the upper side wall of the aquaculture section; The sewage discharge part includes a sewage discharge pipe (7) connected to the bottom of the aquaculture part, one end of the sewage discharge pipe (7) away from the aquaculture part is connected to the bottom of the tail water treatment part, and a sewage discharge pump (8) is provided on the sewage discharge pipe (7); The tailwater treatment section comprises a second shell (12), the bottom end of the second shell (12) is connected to the sewage pipe (7), the top end of the side wall of the second shell (12) is connected to the upper part of the side wall of the aquaculture section, and a plurality of guide plates (14) are arranged in the second shell (12), and the outer side walls of the guide plates (14) are inoculated with microalgae.

2. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: The aquaculture section comprises a first shell (1), a first liquid level controller (2) is provided in the first shell (1), a first sensor assembly (3) is fixedly mounted on the inner side wall of the first shell (1), and the bottom end of the first shell (1) is connected to at least one sewage collecting tank (4), and the bottom end of the sewage collecting tank (4) is connected to the sewage discharge pipe (7).

3. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 2, characterized in that: An ecological bed matrix layer (5) and an anti-escape net (6) are sequentially arranged in the sewage collecting tank (4) from top to bottom. The anti-escape net (6) is fixed to the inner side wall of the sewage collecting tank (4) and arranged horizontally. The ecological bed matrix layer (5) is placed above the anti-escape net (6).

4. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: The guide plates (14) are all fixedly connected to the inner side wall of the second shell (12), the guide plates (14) are arranged in parallel, the guide plates (14) are arranged vertically, and the side walls of the guide plates (14) are not in contact with the inner side wall of the second shell (12).

5. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: A plurality of light-emitting strips (14-2) are fixedly connected to the outer wall of the guide plate (14), and the light-emitting strips (14-2) are arranged in sequence at intervals. The light-emitting strips (14-2) are arranged vertically, and a plurality of small holes (14-3) are arranged between two adjacent light-emitting strips (14-2). The small holes (14-3) are opened on the guide plate (14) and pass through the guide plate (14). The small holes (14-3) are arranged in sequence at intervals from top to bottom. A plurality of films (14-1) are laid on the outer wall of the guide plate (14), and the films (14-1) are located between two adjacent light-emitting strips (14-2). The films (14-1) do not cover the small holes (14-3).

6. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 2, characterized in that: A second liquid level controller (16) is provided in the second shell (12), a second sensor assembly (13) is fixedly mounted on the inner side wall of the second shell (12), a flow meter (19) is fixedly mounted on the inner side wall of the second shell (12), a return pipe (21) is fixedly connected to and communicated with the side wall of the second shell (12), the return pipe (21) is located at the top end of the second shell (12), one end of the return pipe (21) away from the second shell (12) extends into the first shell (1), a return valve (20) is provided on the return pipe (21), the end of the return pipe (21) extending into the first shell (1) is located above the first liquid level controller (2), the other end of the return pipe (21) is located below the second liquid level controller (16), and the flow meter (19) is close to the end of the return pipe (21).

7. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: A mud discharge pipe (10) is fixedly connected to and communicated with the outer wall of the second shell (12). The mud discharge pipe (10) is located at the bottom end of the second shell (12). A mud discharge valve (11) is provided on the mud discharge pipe (10).

8. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: The top end of the second shell (12) is detachably connected to a top rotary cover (17), and an exhaust valve (18) is fixedly connected to and communicated with the top rotary cover (17).

9. The device for collaboratively treating aquaculture tail water by algae and fungi according to claim 1, characterized in that: A gas-liquid ejector (9) is provided below the second shell (12), the gas-liquid ejector (9) is communicated with the sewage pipe (7), and the gas-liquid ejector (9) is located between the sewage pump (8) and the second shell (12).

10. A method for co-processing aquaculture tail water by algae and fungi, based on the device for co-processing aquaculture tail water by algae and fungi according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Determine the aquaculture species, place them in the aquaculture device for breeding, and build an aquaculture area; S2. Determine the type of water-purifying algae, place them in the tailwater treatment device, and construct a tailwater treatment area; S3, the aquaculture tail water is introduced into the second housing (12) through the sewage pipe (7), and the microalgae on the guide plate (14) cooperate with the microorganisms in the aquaculture tail water to treat the aquaculture tail water; S4. The treated clean water is returned to the aquaculture device.