A circulating pond for raising marine fish using brackish water from saline-alkali land.

Abstract

This utility model relates to aquaculture technology and presents a circulating pond for raising marine fish using brackish water from saline-alkali land. The pond includes a brackish water source, a rearing pond, a water quality conditioning system, a circulating filtration system, an aeration system, and an intelligent monitoring system. The bottom of the rearing pond has a central drain outlet and multiple aeration discs. The pond also contains a level sensor and movable partition mesh. The water quality conditioning system includes a salinity adjustment device, a pH adjustment device, and a mineral supplementation device. The circulating filtration system includes a coarse filter, a biological filter, a precision filter, and an ultraviolet sterilizer. The aeration system includes a Roots blower, an oxygen generator, an oxygen distributor, a dissolved oxygen sensor, a main oxygen supply pipeline, and a ring-shaped oxygen supply pipeline. The intelligent monitoring system includes a central controller, multi-parameter water quality sensors, an online ammonia nitrogen analyzer, a camera, and an alarm.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, and more specifically, to a circulating pond for raising marine fish using brackish water in saline-alkali land. Background Technology

[0002] Aquaculture is a vital industry for meeting the growing global demand for high-quality animal protein. Marine fish, due to their high economic value and large market demand, have become an important direction in aquaculture. Traditional marine aquaculture heavily relies on coastal waters, leading to immense environmental pressure and frequent disease outbreaks in nearshore areas. Furthermore, the cost and geographical limitations of developing marine aquaculture in inland regions are difficult to overcome. To address this issue, recirculating aquaculture systems (RAS) have been developed and widely applied. Existing RAS technologies primarily utilize physical filtration, biological purification, and aeration to recycle water in closed or semi-closed environments, effectively reducing water consumption and environmental emissions. Currently, mature RAS technologies are mostly concentrated in freshwater aquaculture or marine aquaculture based on standard natural / artificial seawater. However, my country possesses vast areas of saline-alkali land resources, with abundant brackish water underground. Utilizing these brackish water resources for marine fish farming would transform waste into treasure, opening up a new industrial development path for inland regions, possessing extremely high strategic and economic value. Although this resource contains salt and minerals, its key indicators such as ionic composition, total alkalinity and hardness are significantly different from those of natural seawater. Moreover, the water quality fluctuates greatly. Direct use in marine fish farming can lead to osmotic pressure regulation disorders, growth stagnation and low survival rates in fish.

[0003] Currently, traditional recirculating aquaculture systems are designed based on standard water sources (freshwater or standard seawater). Their core function is to maintain water quality within the system (such as treating ammonia nitrogen and maintaining dissolved oxygen). However, they lack the ability to fundamentally modify and adapt the incoming water source. Directly injecting brackish water into traditional recirculating aquaculture systems cannot solve problems such as ion imbalance, potential risks of harmful substances (such as heavy metals and sulfides), and the impact of water quality fluctuations on the system. Therefore, there is an urgent need for a recirculating aquaculture system specifically designed for brackish water in saline-alkali land. This system can not only perform conventional circulation and filtration, but also actively and intelligently "transform" the brackish water into "artificial seawater" suitable for the growth of marine fish and maintain its stability. Utility Model Content

[0004] This application provides a recirculating pond for raising marine fish using brackish water from saline-alkali land. It solves the problem that traditional recirculating aquaculture systems lack the ability to fundamentally modify and adapt the influent water source. Directly injecting brackish water into traditional recirculating aquaculture systems cannot solve problems such as ion imbalance, potential risks of harmful substances, and the impact of water quality fluctuations on the system.

[0005] This application provides a circulating pond for raising marine fish using brackish water from saline-alkali land, including a brackish water source, a rearing pond, a water quality conditioning system, a circulating filtration system, an oxygenation system, and an intelligent monitoring system. A water pump is installed on the connecting pipe between the brackish water source and the water quality conditioning system. The outlet of the water quality conditioning system is connected to the rearing pond through a fresh water injection pipe. The rearing pond is connected to the circulating filtration system through a pipe. The circulating filtration system is connected to the rearing pond through a circulating water return pipe. The rearing pond is connected to the oxygenation system. The bottom of the aquaculture pond is equipped with a central drain outlet and multiple aeration discs, and the aquaculture pond is equipped with a liquid level sensor and a movable partition mesh. The water quality regulation system includes a salinity regulation device, a pH regulation device, and a mineral replenishment device, which are connected in series. The circulating filtration system includes a coarse filter, a biological filter, a precision filter, and an ultraviolet sterilizer; The oxygenation system includes a Roots blower, an oxygen generator, an oxygen distributor, a dissolved oxygen sensor, a main oxygen supply pipeline, and a ring-shaped oxygen supply pipeline. The intelligent monitoring system includes a central controller, multi-parameter water quality sensors, an online ammonia nitrogen analyzer, cameras, and alarms.

[0006] Preferably, multiple aeration discs are connected and laid on the bottom of the aquaculture pond by the annular oxygen supply pipeline, and the annular oxygen supply pipeline is connected to the main oxygen supply pipeline.

[0007] Preferably, the mineral replenishment device is a dosing chamber containing a trace element compound slow-release block.

[0008] Preferably, a circulating water pump is provided on the circulating water return pipe.

[0009] Preferably, both the coarse filter and the precision filter are provided with a drain pipe at the bottom.

[0010] Preferably, the biofilter is filled with MBBR suspended biological packing material.

[0011] Preferably, the coarse filter is a rotary drum microfilter, and the precision filter is a bag filter or a sand filter.

[0012] Preferably, the dissolved oxygen sensor is installed on the annular oxygen supply pipeline.

[0013] Preferably, the central controller is a programmable logic controller or an industrial computer, and the central controller is electrically connected to the multi-parameter water quality sensor, the online ammonia nitrogen analyzer, the camera, and the alarm.

[0014] Preferably, the alarm is an audible and visual alarm.

[0015] As can be seen from the above technical solution, this application provides a circulating pond for raising marine fish using brackish water from saline-alkali land. In use, the brackish water from the saline-alkali land is extracted and first enters the water quality adjustment system. Salinity and pH sensors monitor the water quality in real time. The central controller drives the salinity and pH adjustment devices to make adjustments, and minerals are added through a mineral supplementation device. After the water quality meets the standards, it is injected into the aquaculture pond. The water in the aquaculture pond enters the circulating filtration system through the central drain outlet, successively undergoing mechanical filtration, biological purification, fine filtration, and ultraviolet disinfection to remove solid waste, toxic substances, and pathogens. The water is then returned to the aquaculture pond through the circulating water return pipe. The oxygenation system continuously supplies oxygen to the pond, and dissolved oxygen sensors ensure that the oxygen supply accurately matches the fish's needs. The intelligent monitoring system monitors all key parameters around the clock, automatically maintaining system balance. Management personnel can remotely monitor and intervene.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through an integrated water quality regulation system, achieves for the first time the active optimization and balance of the ionic composition of brackish water, rather than simply adjusting salinity and pH, thus solving the fundamental problem from the source.

[0017] 2. This utility model combines multiple filtration with ultraviolet disinfection, along with intelligent full-process monitoring and feedback adjustment, to form a stable ecosystem with strong anti-interference capabilities, greatly reducing the risks of aquaculture.

[0018] 3. The high degree of automation and intelligence of this utility model significantly reduces reliance on human experience, reduces labor intensity, and realizes precise feeding and process management, laying the foundation for large-scale, industrialized breeding.

[0019] 4. The design of this utility model, which allows for separate pond aquaculture, improves the flexibility of production management and the output per unit area, and is suitable for multi-variety, segmented aquaculture strategies.

[0020] In summary, a circulating pond for raising marine fish in brackish water of saline-alkali land has, for the first time, achieved active optimization and balance of the ionic composition of brackish water through an integrated water quality regulation system, rather than simply adjusting salinity and pH. This addresses the fundamental problem at its source. Multiple filtration combined with ultraviolet disinfection, along with intelligent full-process monitoring and feedback regulation, constitutes a stable ecosystem with strong anti-interference capabilities, greatly reducing aquaculture risks. The high degree of automation and intelligence significantly reduces reliance on human experience, reduces labor intensity, and enables precise feeding and process management, laying the foundation for large-scale, industrialized aquaculture. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 A schematic diagram of a circulating pond for raising marine fish using brackish water in saline-alkali land, provided by this utility model. Figure 2 A schematic diagram of a circulating aquaculture pond for raising marine fish using brackish water in saline-alkali land, provided by this utility model. Figure 3 A schematic diagram of a circulating filtration system in a circulating pond for raising marine fish using brackish water in saline-alkali land, provided by this utility model. Figure 4 A schematic diagram of an oxygenation system in a circulating pond for raising marine fish using brackish water in saline-alkali land, provided by this utility model. Figure 5 This is a schematic diagram of an intelligent monitoring system for a circulating pond used for raising marine fish in saline-alkali land and brackish water, provided by this utility model.

[0023] The reference numerals in the detailed embodiments are as follows: 1. Aquaculture pond; 11. Central drainage outlet; 12. Aeration disc; 13. Liquid level sensor; 14. Movable partition mesh; 2. Water quality conditioning system; 21. Salinity adjustment device; 22. pH adjustment device; 23. Mineral supplementation device; 3. Circulating filtration system; 31. Coarse filter; 32. Biological filter; 33. Precision filter; 34. Ultraviolet sterilizer; 35. Sewage pipe; 4. Oxygenation system; 41. Roots blower; 42. Oxygen generator; 43. Oxygen distributor; 44. Dissolved oxygen sensor; 45. Main oxygen supply pipeline; 46. Circulating oxygen supply pipeline; 5. Intelligent monitoring system; 51. Central controller; 52. Multi-parameter water quality sensor; 53. Ammonia nitrogen online analyzer; 54. Camera; 55. Alarm; 6. Brackish water source for saline-alkali land; 7. Fresh water injection pipeline; 8. Circulating water return pipeline; 9. Circulating water pump; 10. Water pump. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] See Figure 1-5This application presents a recirculating pond for raising marine fish using brackish water from saline-alkali land. To address the shortcomings of traditional recirculating aquaculture systems (RAS) in fundamentally modifying and adapting the influent water source, and the inability to resolve issues such as ion imbalance, potential risks from harmful substances, and the impact of water quality fluctuations by directly injecting brackish water into traditional ARS systems, this application proposes a recirculating pond for raising marine fish using brackish water from saline-alkali land. Through an integrated water quality regulation system, it achieves, for the first time, the active optimization and balance of the ion composition of brackish water, rather than simply adjusting salinity and pH, thus solving the fundamental problems at the source. Multiple filtration combined with ultraviolet disinfection, along with intelligent full-process monitoring and feedback regulation, constitutes a highly stable ecosystem with strong anti-interference capabilities, greatly reducing aquaculture risks. The high degree of automation and intelligence significantly reduces reliance on human experience, decreases labor intensity, and enables precise feeding and process management, laying the foundation for large-scale, industrialized aquaculture.

[0026] Specifically, a recirculating pond for raising marine fish using brackish water from saline-alkali land includes a brackish water source 6, a rearing pond 1, a water quality conditioning system 2, a circulating filtration system 3, an oxygenation system 4, and an intelligent monitoring system 5. A water pump 10 is installed on the connecting pipe between the brackish water source 6 and the water quality conditioning system 2. The outlet of the water quality conditioning system 2 is connected to the rearing pond 1 via a fresh water injection pipe 7. The rearing pond 1 is connected to the circulating filtration system 3 via a pipe. The circulating filtration system 3 is connected to the rearing pond 1 via a circulating water return pipe 8, which is equipped with a circulating water pump 9. The rearing pond 1 is connected to the oxygenation system 4. The bottom of the rearing pond 1 has a central drain outlet 11 and multiple aeration discs 12, which are connected to a ring-shaped oxygen supply pipe 4. 6 is laid at the bottom of the aquaculture pond 1. The annular oxygen supply pipe 46 is connected to the main oxygen supply pipe 45. The aquaculture pond 1 is equipped with a liquid level sensor 13 and a movable partition mesh 14. The bottom of the aquaculture pond 1 adopts a cone bottom or pot bottom design and is equipped with a central drain outlet 11, which is conducive to the accumulation and discharge of waste. The inner wall of the aquaculture pond 1 is lined with high-density polyethylene corrosion-resistant and waterproof material. Several aeration discs 12 are evenly distributed at the bottom of the aquaculture pond 1. The aeration discs 12 are connected through the annular oxygen supply pipe 46. The annular oxygen supply pipe 46 is connected to the main oxygen supply pipe 45 and connected to the oxygenation system 4. The aquaculture pond 1 is divided into multiple independent aquaculture units by the movable partition mesh 14 to realize the separate management of different types or sizes of fish, improve space utilization and aquaculture flexibility. The water quality conditioning system 2 includes a salinity conditioning device 21, a pH conditioning device 22, and a mineral replenishment device 23, which are connected in series. The mineral replenishment device 23 is a dosing chamber containing a trace element compound slow-release block. The salinity conditioning device 21 controls the addition of concentrated brine or pure water based on feedback from an online salinity sensor, precisely stabilizing the water salinity at 25-35%. The pH conditioning device 22 controls the addition of food-grade carbonic acid or sodium bicarbonate solution via a metering pump based on feedback from an online pH sensor, stabilizing the pH value at 7.8-8.4. The mineral replenishment device 23 includes a dosing chamber containing a trace element compound slow-release block, which can slowly release essential elements such as potassium and magnesium based on monitoring data or at set intervals to balance ions. Composition: The circulating filtration system 3 includes a coarse filter 31, a biological filter 32, a precision filter 33, and an ultraviolet sterilizer 34. The coarse filter 31 is a rotary drum microfilter. The biological filter 32 is filled with MBBR suspended biological media. The precision filter 33 is a bag filter or a sand filter. Both the coarse filter 31 and the precision filter 33 are equipped with a drain pipe 35 at the bottom. The coarse filter 31, the biological filter 32, the precision filter 33, and the ultraviolet sterilizer 34 are connected sequentially along the water flow direction. The biological filter 32 uses nitrifying / denitrifying bacteria to degrade toxic substances such as ammonia nitrogen and nitrite. The ultraviolet sterilizer 34 is used to kill pathogenic microorganisms in the water and block the spread of diseases. The waste liquid and waste residue discharged from the drain pipe 35 at the bottom of the coarse filter 31 and the precision filter 33 are collected and centrally treated.

[0027] The oxygenation system 4 includes a Roots blower 41, an oxygen generator 42, an oxygen distributor 43, a dissolved oxygen sensor 44, a main oxygen supply pipeline 45, and a ring-shaped oxygen supply pipeline 46. The dissolved oxygen sensor 44 is installed on the ring-shaped oxygen supply pipeline 46. The dissolved oxygen sensor 44 monitors the dissolved oxygen content of the water in real time and adjusts the start / stop and output of the oxygen generator 42 in conjunction with the central controller 51 to ensure that the dissolved oxygen content is stable at a high level of 5-8 mg / L. The intelligent monitoring system 5 includes a central controller 51, a multi-parameter water quality sensor 52, an online ammonia nitrogen analyzer 53, a camera 54, and an alarm 55. The monitoring system 5 is the control center of the entire device. The central controller 51 is a programmable logic controller or industrial computer that supports remote data transmission and control. The central controller 51 is electrically connected to the multi-parameter water quality sensor 52, the online ammonia nitrogen analyzer 53, the camera 54, and the alarm 55. The alarm 55 is an audible and visual alarm. Based on a preset program, the central controller 51 automatically controls the operation of all the actuators of the water quality conditioning system 2, the circulating filtration system 3, and the oxygenation system 4. It can also perform human-machine interaction, data recording, and alarm prompts through a touch screen or remote terminal to achieve unmanned intelligent management.

[0028] As can be seen from the above technical solution, in the use of a circulating pond for raising marine fish using brackish water from saline-alkali land, the brackish water source 6 from the saline-alkali land is first pumped into the water quality adjustment system 2. The salinity and pH sensors detect the water quality in real time. The central controller 51 drives the salinity adjustment device 21 and the pH adjustment device 22 to make adjustments, and minerals are added through the mineral supplementation device 23. After the water quality meets the standards, it is injected into the aquaculture pond 1. The water in the aquaculture pond 1 enters the circulating filtration system 3 through the central drain outlet 11. It passes through mechanical filtration, biological purification, fine filtration and ultraviolet disinfection in sequence to remove solid waste, toxic substances and pathogens. After that, it flows back to the aquaculture pond 1 through the circulating water return pipe 8. The oxygenation system 4 continuously supplies oxygen to the aquaculture pond 1. The dissolved oxygen sensor 44 ensures that the oxygen supply is accurately matched to the needs of the fish. The intelligent monitoring system 5 monitors all key parameters around the clock and automatically maintains the system balance. Managers can remotely monitor and intervene.

[0029] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the applications disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0030] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A circulating pond for raising marine fish using brackish water from saline-alkali land, characterized in that: The system includes a saline-alkali land brackish water source (6), an aquaculture pond (1), a water quality regulation system (2), a circulating filtration system (3), an oxygenation system (4), and an intelligent monitoring system (5). A water pump (10) is installed on the connecting pipe between the saline-alkali land brackish water source (6) and the water quality regulation system (2). The outlet of the water quality regulation system (2) is connected to the aquaculture pond (1) through a fresh water injection pipe (7). The aquaculture pond (1) is connected to the circulating filtration system (3) through a pipe. The circulating filtration system (3) is connected to the aquaculture pond (1) through a circulating water return pipe (8). The aquaculture pond (1) is connected to the oxygenation system (4). The bottom of the aquaculture pond (1) is provided with a central drain outlet (11) and multiple aeration discs (12). The aquaculture pond (1) is provided with a liquid level sensor (13) and a movable partition mesh (14). The water quality regulation system (2) includes a salinity regulation device (21), a pH regulation device (22), and a mineral replenishment device (23), which are connected in series. The circulating filtration system (3) includes a coarse filter (31), a biological filter (32), a precision filter (33), and an ultraviolet sterilizer (34). The oxygenation system (4) includes a Roots blower (41), an oxygen generator (42), an oxygen distributor (43), a dissolved oxygen sensor (44), a main oxygen supply pipeline (45), and a ring-shaped oxygen supply pipeline (46). The intelligent monitoring system (5) includes a central controller (51), a multi-parameter water quality sensor (52), an online ammonia nitrogen analyzer (53), a camera (54), and an alarm (55).

2. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: Multiple aeration discs (12) are connected to the bottom of the aquaculture pond (1) by the annular oxygen supply pipeline (46), and the annular oxygen supply pipeline (46) is connected to the main oxygen supply pipeline (45).

3. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The mineral supplementation device (23) is a dosing chamber containing a trace element compound slow-release block.

4. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: A circulating water pump (9) is installed on the circulating water return pipe (8).

5. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: Both the coarse filter (31) and the precision filter (33) are equipped with drain pipes (35) at the bottom.

6. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The biofilter (32) is filled with MBBR suspended biological packing material.

7. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The coarse filter (31) is a rotary drum microfilter, and the precision filter (33) is a bag filter or a sand filter.

8. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The dissolved oxygen sensor (44) is installed on the annular oxygen supply pipeline (46).

9. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The central controller (51) is a programmable logic controller or an industrial computer, and the central controller (51) is electrically connected to the multi-parameter water quality sensor (52), the online ammonia nitrogen analyzer (53), the camera (54) and the alarm (55).

10. A circulating pond for raising marine fish using brackish water in saline-alkali land according to claim 1, characterized in that: The alarm (55) is an audible and visual alarm.

Images