Live fresh warehouse circulating ecological system

Abstract

The utility model provides live fresh storehouse circulation ecological system, and the water after biochemical module processing flows through post sand filter tank, disinfection module and light reaction module in proper order. Post sand filter tank is responsible for filtering off suspended particles and other impurities in water, further improves the purity of water quality, disinfection module carries out sterilization treatment to water body, effectively kills the residual harmful microorganism, ensures the safety of water quality, and water body enters light reaction module, in light reaction module, algae carries out photosynthesis under the light condition, utilizes carbon dioxide and nutrient salt in water to grow and breed, and the seawater after this series of processing is transported to the temporary breeding system, provides a clean, healthy and rich algal bait growth environment for live fresh, thereby effectively solve traditional temporary breeding system in water quality is easy to be contaminated, algal bait supply is not stable and disinfection maintenance is not convenient and so on problem, greatly improves the survival rate and growth efficiency of temporary breeding organism.

Description

Technical Field

[0001] This utility model relates to the field of live seafood storage and recycling ecosystem. Background Technology

[0002] In aquaculture temporary holding systems, the supply of algae feed is one of the key factors in ensuring the growth and health of the held organisms. Currently, there are two main methods of supplying algae:

[0003] One method is to directly utilize the natural algae in the temporary holding water as food. This method is simple, easy to implement, and low in cost, but it has many limitations. For example, in some high-density temporary holding systems, the growth rate of natural algae often cannot keep up with the feeding needs of the temporarily held organisms, resulting in insufficient food supply. Moreover, the growth of natural algae is greatly affected by environmental factors, such as light, temperature, and water quality, making it difficult to maintain a stable supply. In addition, the types and nutritional components of natural algae are relatively limited, failing to meet the needs of temporarily held organisms for food diversity and comprehensive nutrition.

[0004] Secondly, microalgae can be artificially cultivated as food. Currently, the microalgae that can be cultivated in large quantities artificially include Chlorella, Platycladus, and Chaetoceros, mostly grown in algae ponds or natural water bodies using extensive cultivation methods. While this method can increase the supply of algal food to some extent, it still has some problems. It relies heavily on the natural environment and is greatly affected by weather and other factors, often leading to untimely supply, a disconnect from seedling cultivation progress, and low production efficiency, making it unable to meet the needs of large-scale temporary rearing. Furthermore, the algae cultivated in this way have low concentrations and low food potency, making it difficult to meet the nutritional needs of temporarily reared organisms.

[0005] Overall, existing algae feed supply methods are insufficient in terms of stability and efficiency, making it difficult to meet the demand of aquaculture temporary holding systems for a high-quality and stable supply of algae feed. Utility Model Content

[0006] Therefore, it is necessary to provide a live food storage circular ecosystem to address the shortcomings of existing algae feed supply methods in terms of stability and efficiency, which make it difficult to meet the demand of aquatic temporary holding systems for high-quality and stable algae feed supply.

[0007] To achieve the above objectives, this utility model provides a live seafood storage circular ecosystem, comprising a biochemical module, a post-sand filter, a disinfection module, a photoreaction module, and a temporary holding module connected in sequence.

[0008] The biochemical module includes multiple biochemical tanks and at least one nitrification tank. The multiple biochemical tanks are respectively connected in parallel with the same nitrification tank. The water treated by the biochemical module is transported to the post-sand filter.

[0009] The post-sand filter is used to filter water that has been treated by the biochemical module;

[0010] The disinfection module is used for sterilization;

[0011] The photoreaction module is used for algae cultivation;

[0012] The temporary holding module is used to receive algae feed from the photoreaction module and to carry out short-term feeding of live aquatic products.

[0013] Furthermore, the biochemical tank includes a tank body and a support frame and an aeration disc disposed inside the tank body; the support frame is fixedly connected to the inner wall of the tank body through a crossbeam and a gap is provided between the bottom surface of the support frame and the bottom of the tank body, and the bottom surface of the support frame is a grid structure; biological filter media is disposed inside the support frame; the aeration disc is disposed below the support frame; a sewage outlet is provided on the bottom left side of the tank body, and the sewage outlet is connected to a sewage suction pump.

[0014] Furthermore, it also includes a reciprocating travel mechanism, which is located below the aeration disc and is equipped with a scraper. When the scraper travels from right to left, its outer edge approaches the bottom of the main body of the pool, and when it travels from left to right, its outer edge approaches the bottom of the aeration disc.

[0015] Furthermore, the bottom surface of the pool body is sloped, tilting upwards from left to right.

[0016] Furthermore, the biological treatment tank is equipped with a water quality monitoring module, which includes at least an OPR meter, a pH meter, or a turbidity meter; and / or

[0017] It also includes a pH adjustment device, which is used to adjust the pH value of the biological treatment tank or the nitrification tank.

[0018] Furthermore, it also includes a pre-sand filter, one end of which is connected to a water source and the other end of which is connected to the biochemical module.

[0019] Furthermore, it also includes an ultrafiltration device, which is disposed between the pre-sand filter and the nitrification tank.

[0020] Furthermore, it also includes a residual chlorine detection device, with each of the biochemical tanks equipped with such a device.

[0021] Furthermore, the disinfection module is an electrodeless ultraviolet lamp.

[0022] Furthermore, the capacity of the photoreaction module is 1-5 times the capacity of the biochemical pool.

[0023] Unlike existing technologies, the water treated by the above-mentioned technical solution flows sequentially through a post-sand filter, a disinfection module, and a photoreactor module after being processed by the biochemical module. The post-sand filter removes suspended particles and other impurities from the water, further improving its purity. The disinfection module sterilizes the water, effectively killing any remaining harmful microorganisms and ensuring water safety. The water then enters the photoreactor module, which can be modeled after a cylindrical pipeline microalgae photoreactor. Within this module, algae perform photosynthesis under light conditions, utilizing carbon dioxide and nutrients in the water for growth and reproduction. After this series of treatments, the seawater is transported to the temporary holding system, providing a clean, healthy, and algae-rich growth environment for live seafood. This effectively solves the problems of easy water pollution, unstable algae supply, and inconvenient disinfection and maintenance in traditional temporary holding systems, greatly improving the survival rate and growth efficiency of the temporarily held organisms. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the live seafood recycling ecosystem described in the specific implementation method;

[0025] Figure 2 This is a schematic diagram of the structure of the biochemical module described in a specific implementation method;

[0026] Figure 3 This is a schematic diagram of the structure of the post-sand filter, disinfection module, photoreaction module, and temporary holding module described in the specific implementation method.

[0027] Figure 4 This is a schematic diagram of the structure of the biochemical pool described in another specific embodiment;

[0028] Figure 5 This is a schematic diagram showing the connection between the biochemical tank and the water quality detection module, pH adjustment device, and residual chlorine detection device in another specific embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Biochemical Module; 20. Post-Granular Sand Filter; 30. Disinfection Module; 40. Photochemical Reactor Module; 50. Temporary Holding Module; 101. Biochemical Tank; 102. Nitrification Tank; 1011. Support Frame; 1012. Aeration Disc; 1013. Biological Filter Media; 1014. Sewage Outlet; 1015. Scraper; 1016. Reciprocating Movement Mechanism; 104. Water Quality Monitoring Module; 1041. OPR Meter; 1042. pH Meter; 1043. Turbidity Meter; 60. Pre-Granular Sand Filter; 70. Ultrafiltration Device; 80. Residual Chlorine Detection Device; 81. pH Adjustment Device. Detailed Implementation

[0031] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Please see Figures 1 to 5 This embodiment provides a live seafood storage circular ecosystem, including a biochemical module 10, a post-sand filter 20, a disinfection module 30, a photoreaction module 40, and a temporary holding module 50 connected in sequence. Specifically, the inlet of the biochemical module 10 is connected to a water source, such as seawater, the outlet of the biochemical module 10 is connected to the inlet of the post-sand filter 20, the outlet of the post-sand filter 20 is connected to the inlet of the disinfection module 30, the outlet of the disinfection module 30 is connected to the inlet of the photoreaction module 40, and the outlet of the photoreaction module 40 is connected to the inlet of the temporary holding module 50. Each module and the post-sand filter 20 can be connected sequentially via pipelines. The material of the pipelines needs to comprehensively consider factors such as corrosion resistance, mechanical strength, cost, and ease of installation. Specifically, the following can be used: PVC pipes, which are corrosion-resistant, chemically stable, inexpensive, and easy to install; HDPE pipes, which are high-strength, corrosion-resistant, and flexible; 316L stainless steel pipes, which are resistant to chloride ion corrosion and have a long service life; copper-nickel alloy pipes (such as 90Cu / 10Ni), which are resistant to seawater corrosion and marine organism adhesion, but are expensive and have low mechanical strength; fiberglass pipes, which are corrosion-resistant, high-strength, and lightweight; and hot-dip plastic-coated steel pipes, which combine corrosion resistance and high strength.

[0041] The biochemical module 10 includes multiple biochemical tanks 101 and at least one nitrification tank 102. The multiple biochemical tanks 101 are connected in parallel with the same nitrification tank 102. Water treated by the biochemical module 10 is transported to the post-sand filter 20. Each biochemical tank 101 comprises biological filter media (such as coral stone, K3 polyethylene packing, volcanic rock, etc.), aeration equipment (such as nano-aeration discs 1012), a water flow system, and a tank structure. The biological filter media provides an attachment carrier for microorganisms, the aeration equipment supplies oxygen, and the water flow system circulates the water to ensure sufficient contact between pollutants and microorganisms. The tank is divided into different functional areas. The main function of the biochemical tank 101 is to remove harmful substances such as organic matter, ammonia nitrogen, and nitrite from the water, reduce chemical oxygen demand (COD), increase dissolved oxygen content, and purify the water to meet the growth requirements of aquaculture organisms. Its working principle is based on the metabolic activities of microorganisms: nitrification, in which nitrifying bacteria oxidize ammonia nitrogen into nitrate under aerobic conditions; denitrification, in which denitrifying bacteria reduce nitrate into nitrogen gas under anaerobic conditions; at the same time, microorganisms decompose organic matter into inorganic substances such as carbon dioxide and water, realizing the mineralization of organic matter, thereby purifying water quality.

[0042] The post-filter 20 is used to filter the water treated by the biochemical module 10, and has an internal gravel filter layer (usually quartz sand, etc.). Its function is to filter suspended particles and impurities in the water to reduce turbidity, improve water clarity, and ensure the efficiency of subsequent treatment processes and a healthy growth environment for aquaculture organisms. The working principle is that when water flows through the gravel filter layer, suspended solids and impurities are intercepted and adsorbed by the gravel particles, thus achieving preliminary water purification.

[0043] The disinfection module 30 is used for sterilization. Specifically, the disinfection module 30 can employ disinfection equipment such as ultraviolet lamps or ozone generators. Its core function is to kill pathogens such as bacteria, viruses, fungi, and parasites in the water, effectively preventing and controlling the occurrence and spread of aquatic animal diseases, and ensuring the healthy growth of farmed animals. The working principle of the disinfection module 30 varies depending on the type of disinfection equipment: ultraviolet disinfection utilizes ultraviolet light (UV-C band) to penetrate the cell wall and nucleus of microorganisms, destroying their DNA or RNA structure, causing them to lose their reproductive ability and die; ozone disinfection uses an ozone generator to produce highly oxidizing ozone. After ozone dissolves in water, it releases oxygen atoms with strong oxidizing capabilities, which can oxidize the cell membrane of microorganisms, causing them to rupture and lose their activity.

[0044] The photoreaction module 40 is used for algae cultivation. It mainly consists of a lighting unit (such as an ultraviolet lamp), a microalgae cultivation container, a nutrient supply unit, a gas exchange unit, and a control unit. Its function is to regulate the water flow rate and light duration in the pipeline through microalgae photosynthesis, synthesizing organic matter and promoting algae growth to provide food for the downstream aquaculture holding system. Its working principle is that the lighting system provides suitable light intensity and photoperiod for the microalgae, simulating natural light conditions to promote photosynthesis. The nutrient supply system adds appropriate amounts of nutrients, such as nitrogen, phosphorus, and potassium, to the cultivation container to meet the nutritional needs of the microalgae. The gas exchange system can introduce carbon dioxide into the water to improve the efficiency of microalgae photosynthesis while releasing oxygen produced by photosynthesis to maintain oxygen balance in the water. The control system monitors and regulates parameters such as light intensity, temperature, pH, dissolved oxygen concentration, and nutrient concentration in the water to ensure that the microalgae are in the optimal growth environment. In this way, the microalgae photoreactor can efficiently cultivate a large number of microalgae as food for organisms in the aquaculture holding system, reducing feed costs. At the same time, the photosynthesis of microalgae can also increase dissolved oxygen in the water and improve the water quality environment. The photoreactor module 40 can be a cylindrical pipeline type microalgae photoreactor as used in the prior art.

[0045] The temporary holding module 50 is used to receive algae feed from the photoreaction module 40 and to conduct short-term rearing of live aquatic organisms. The temporary holding module 50 can be a square or circular holding tank. The tank walls are welded from high-strength, corrosion-resistant fiberglass or stainless steel plates, capable of withstanding certain water pressure and possessing good sealing properties. The tank bottom has a conical design, lower in the center and higher around the edges, with a central drain outlet for easy drainage and cleaning. Multiple aeration devices, such as microporous aeration discs 1012, are evenly distributed at the bottom of the tank and connected to an external air pump to provide sufficient oxygen for the reared organisms. Water quality monitoring sensors are installed on the tank walls to monitor parameters such as dissolved oxygen, temperature, and pH in real time, ensuring a suitable aquatic environment for the reared organisms.

[0046] The working principle of this new system is as follows: Seawater first enters the biochemical module 10. Multiple biochemical tanks 101 and nitrification tanks 102 within the biochemical module 10 are connected in parallel, giving the system high flexibility and stability. When a particular biochemical tank 101 becomes contaminated or requires disinfection, it can be disinfected independently without affecting the normal operation of other biochemical tanks 101. The disinfection process is as follows: The water in the biochemical tank 101 is drained, clean water is added, and 200-1000 ppm of bleaching powder or bleach solution is added. The self-circulation mode is activated. Over the next 24-48 hours, the reciprocating mechanism continuously drives the scraper 1015 to remove the sludge from the bottom of the biochemical tank 101. When the residual chlorine level is zero, the biochemical tank 101 is repeatedly rinsed with clean water until the water is clear. This marks the end of the bleaching and cleaning process. The process is repeated once more to complete the original bleaching and cleaning. After this process is completed, the water in nitrification tank 102, rich in nitrifying bacteria, can be circulated and exchanged with the water in disinfected biological treatment tank 101. The bacteria in nitrification biological treatment tank 101 help to re-coat the disinfected biological treatment tank 101. It should be noted that the pipeline returning from nitrification tank 102 to biological treatment tank 101 does not need to pass through sand filtration or ultrafiltration.

[0047] After being treated by the biochemical module 10, the water flows sequentially through the post-sand filter 20, the disinfection module 30, and the photoreactor module 40. The post-sand filter 20 filters out suspended particles and other impurities, further improving water purity. Next, the disinfection module 30 sterilizes the water, effectively killing any remaining harmful microorganisms and ensuring water safety. Subsequently, the water enters the photoreactor module 40, which can be modeled after a cylindrical pipeline microalgae photoreactor. Inside the photoreactor module 40, algae perform photosynthesis under light conditions, using carbon dioxide and nutrients in the water for growth and reproduction. The seawater, after this series of treatments, is then transported to the temporary holding system, providing a clean, healthy, and algae-rich growth environment for live organisms. This effectively solves problems such as easy water pollution, unstable algae supply, and inconvenient disinfection and maintenance in traditional temporary holding systems, significantly improving the survival rate and growth efficiency of the held organisms.

[0048] In some embodiments, the biological tank 101 includes a tank body and a support frame 1011 and an aeration disc 1012 disposed inside the tank body; the support frame 1011 is fixedly connected to the inner wall of the tank body through a crossbeam and a gap is provided between the bottom surface of the support frame 1011 and the bottom of the tank body, and the bottom surface of the support frame 1011 is a grid structure; biological filter media 1013 is disposed inside the support frame 1011; the aeration disc 1012 is disposed below the support frame 1011; a sewage outlet 1014 is provided on the bottom left side of the tank body, and the sewage outlet 1014 is connected to a sewage suction pump.

[0049] The support frame 1011 can be a square or columnar hollow structure, made of materials such as stainless steel or engineering plastics. These materials not only have sufficient strength but are also corrosion-resistant, capable of withstanding the pressure of water and biological filter media 1013 for a long time. The support frame 1011 is filled with coral stone or biological filter media 1013, providing a place for microorganisms to attach and grow. The bottom surface of the support frame 1011 is designed as a grid. This structure can both support the coral stone or biological filter media 1013 above, preventing it from sinking to the bottom of the pool, and ensure smooth water flow, facilitating material exchange and microbial metabolism. Impurities produced by microbial metabolism can sink to the bottom of the biological tank 101 through the grid gaps, without accumulating and mixing with the biological filter media 1013, making it easy to collect and clean sludge.

[0050] The aeration disc 1012 is installed below the support frame 1011 and mainly consists of a microporous aeration membrane and air supply pipes. Under the action of the aeration disc 1012, air is continuously supplied to the water, forming a large number of tiny bubbles. These bubbles, as they rise, provide sufficient oxygen for the growth and metabolism of microorganisms, promoting the smooth progress of biochemical reactions such as nitrification, thereby effectively degrading organic pollutants in the water. The support frame 1011 elevates the filter media, effectively separating it from the sludge settled at the bottom of the tank. This separation method helps prevent filter media clogging, maintains good aeration and filtration performance of the biological filter media 1013, and facilitates timely discharge of sludge from the bottom of the tank via the drain outlet 1014, achieving efficient operation and long-term stability of the biological treatment tank 101.

[0051] In some embodiments, a reciprocating travel mechanism 1016 is also included. The reciprocating travel mechanism is disposed below the aeration disc 1012 and is provided with a scraper 1015. When the scraper 1015 travels from right to left, its outer edge approaches the bottom of the pool body, and when it travels from left to right, its outer edge approaches the bottom of the aeration disc 1012.

[0052] The reciprocating travel mechanism is a key device for cleaning the bottom sludge of the biological treatment tank 101, and its structural design is similar to that of a conveyor belt. It mainly consists of a drive motor, a transmission chain, a drive shaft, and a driven shaft. The drive motor rotates the drive shaft, transmitting power to the driven shaft via the transmission chain, ensuring stable operation of the entire device. Multiple scrapers 1015 are evenly spaced and fixed on the transmission chain. Under the action of the drive motor, the scrapers 1015 reciprocate along the bottom of the tank body. As the scrapers 1015 travel from right to left, their outer edges adhere closely to the bottom of the tank body, gradually pushing the sludge towards the discharge port 1014. When the scrapers 1015 return from left to right, their outer edges approach the bottom of the aeration disc 1012, avoiding interference with the sludge already accumulated near the discharge port 1014, ensuring efficient sludge collection. This allows the bottom sludge of the biological treatment tank 101 to be cleaned promptly while the tank is operating normally. The sludge is continuously collected to one side of the sewage outlet 1014, which greatly improves sewage discharge efficiency and reduces the frequency and labor intensity of manual cleaning. At the same time, by sampling the sludge, the pollution status of the pool bottom can be monitored, which facilitates the timely implementation of corresponding maintenance measures and ensures the long-term stable operation of the biological treatment pool 101.

[0053] In some embodiments, the bottom surface of the pool body is sloped, tilting upwards from left to right. Specifically, the bottom surface of the pool body has an inclination angle of 5-15°. This inclination guides the water flow, allowing some of the silt to slide naturally to lower areas under gravity and eventually accumulate in the lower part of the pool bottom. This inclined structure not only helps reduce water flow resistance but also effectively prevents silt from accumulating on a large scale at the bottom of the pool, greatly improving the efficiency of silt removal. In actual operation, the 5-15° inclination angle ensures both the stability of the pool structure and the smooth sliding of silt to the vicinity of the discharge outlet 1014, facilitating subsequent cleaning work.

[0054] In some embodiments, the biological treatment tank 101 is equipped with a water quality monitoring module 104, which includes at least an OPR meter 1041, a pH meter 1042, or a turbidity meter 1043. In the biological treatment tank 101, the OPR meter, pH meter, and turbidity meter are key water quality monitoring devices. The OPR meter, based on optical principles, uses light of a specific wavelength to illuminate the water body and measures the degree of light absorption or scattering in the water to reflect the relative content of organic pollutants in the water. During the biological treatment process, the OPR meter can monitor the removal effect of organic pollutants in real time, helping operators to adjust the treatment process parameters in a timely manner. The pH meter works by using the potential difference between a glass electrode and a reference electrode to measure the acidity or alkalinity of the water. In biological treatment, the metabolic activity of microorganisms is very sensitive to pH values; the pH meter can monitor the acidity and alkalinity changes of the tank water in real time, providing data support for maintaining the optimal growth environment for microorganisms. The turbidity meter determines the content of suspended particulate matter in the water by measuring the intensity of scattered light in the water body. During the biochemical treatment process, turbidimeters can effectively monitor the removal of suspended particulate matter in water, thereby assessing the effectiveness of the biochemical treatment.

[0055] Furthermore, the system also includes a pH adjustment device 81, which is used to adjust the pH value of the biological treatment tank 101 or the nitrification tank 102. The pH adjustment device works in conjunction with a pH meter and mainly consists of an acid / alkali storage tank, a metering pump, and a control unit. When the pH meter detects that the pH value of the tank water is below 7, the control system activates the metering pump to precisely add an appropriate amount of baking soda solution. The baking soda solution neutralizes the acidic substances in the water, causing the pH value to gradually rise and stabilize above pH 8. This automated pH adjustment system ensures that the microorganisms in the biological treatment tank 101 are in a suitable pH environment, guaranteeing efficient metabolic activities, thereby improving the efficiency of biological treatment and maintaining the stable operation of the entire circular ecosystem.

[0056] In some embodiments, a pre-sand filter 60 is also included, one end of which is connected to a water source and the other end to the biochemical module 10. The pre-sand filter 60 may be a cylindrical sand filter, filled with uniformly sized quartz sand as filter media. The seawater to be treated flows in through the inlet pipe at the top of the sand filter, and after being evenly distributed, passes through the quartz sand filter layer. Under the action of gravity, suspended particles, silt, and other impurities in the water are trapped by the quartz sand, and the filtered clear water flows out through the outlet pipe at the bottom of the sand filter and enters the biochemical module 10.

[0057] The pre-sand filters 60 are typically installed in parallel, allowing multiple filters to be arranged simultaneously to meet seawater treatment needs of varying scales. In this way, the pre-sand filters 60 effectively remove large particulate impurities from seawater, reducing the burden on subsequent biological treatment and improving the overall efficiency and stability of the circular ecosystem. Furthermore, the parallel installation of sand filters allows for flexible adjustment of the number in operation based on actual conditions, achieving energy-efficient operation.

[0058] In some embodiments, an ultrafiltration device 70 is also included, which is disposed between the pre-sand filter 60 and the nitrification tank 102. The ultrafiltration device 70 specifically comprises a pressure pump, an ultrafiltration membrane module, a cleaning system, and a control unit. The pressure pump provides sufficient pressure for the transport of seawater to pass through the ultrafiltration membrane module. The ultrafiltration membrane module generally uses hollow fiber membranes or flat sheet membranes. The pore size of these membranes can precisely trap impurities such as bacteria, colloids, and suspended solids in the water, while allowing water molecules and small molecules to permeate. In its working principle, seawater flows over the surface of the ultrafiltration membrane under pressure. Water molecules and small molecules permeate through the membrane pores to form ultrafiltrate, while large molecular impurities and particulate matter are trapped on the membrane surface, thereby achieving deep purification of seawater. As the filtration time increases, impurities on the membrane surface gradually accumulate to form a fouling layer, leading to a decrease in membrane flux. At this time, the cleaning system is periodically activated to clean and regenerate the ultrafiltration membrane through a combination of physical (e.g., backwashing) and chemical (e.g., acid-base cleaning) methods, restoring the membrane flux and performance. The introduction of the ultrafiltration unit 70 brings significant benefits to the circular ecosystem. Its high-efficiency filtration effectively removes harmful impurities from seawater, further improving water purity and ensuring the quality of seawater entering the biological module 10. This not only helps improve the efficiency of biological treatment but also reduces the operating load of subsequent treatment modules, extends the service life of the entire system, and enhances the stability and reliability of the circular ecosystem.

[0059] In some embodiments, a residual chlorine detection device 80 is also included, with each of the biological treatment tanks 101 equipped with such a device. The residual chlorine detection device 80 comprises a colorimeter, a reagent storage unit, and a control unit. The colorimeter reflects the residual chlorine content by detecting the absorbance of the water sample. Its operating principle is based on the reaction of residual chlorine with a specific colorimetric reagent to generate a colored compound; the absorbance of the water sample is directly proportional to the residual chlorine concentration. The reagent storage unit stores the colorimetric reagent, which is added at a set dosage during detection. During detection, the water sample is automatically collected and mixed with the colorimetric reagent. After a reaction period, the colorimeter measures the absorbance, and the control system analyzes the data to determine the residual chlorine concentration. This device achieves accurate real-time monitoring of residual chlorine, laying the foundation for the automation of the disinfection process in a circular ecosystem. During disinfection, when the residual chlorine detection device 80 displays zero residual chlorine, a clean water rinsing step is automatically triggered to ensure disinfection effectiveness and avoid over-disinfection. This improves water quality safety, supports efficient and stable system operation, and is crucial for maintaining the health of temporarily held organisms.

[0060] In some embodiments, the disinfection module 30 is an electrodeless ultraviolet lamp. An electrodeless ultraviolet lamp is a highly efficient disinfection device whose working principle is based on the destructive effect of ultraviolet light on microbial cells. This lamp employs a special electrodeless discharge technology, capable of generating high-intensity ultraviolet radiation. When water flows through the irradiation area of ​​the electrodeless ultraviolet lamp, the ultraviolet light can penetrate the cell walls and cell membranes of microorganisms, destroying their DNA or RNA molecular structure, thereby achieving sterilization. This sterilization method has a broad spectrum, capable of killing various microorganisms in the water, such as bacteria, viruses, and algae, effectively preventing microbial invasion of temporarily held organisms, ensuring the health of organisms during the temporary holding period, stabilizing the water quality of the temporary holding system, reducing disease outbreaks, and improving the survival rate and quality of temporarily held organisms.

[0061] In some embodiments, the capacity of the photoreactor module 40 is 1-5 times the capacity of the biological tank 101. This design, where the capacity of the photoreactor module 40 is 1-5 times that of the biological tank 101, fully considers the supply of nutrients required for algal growth. Within the photoreactor module 40, algae can fully absorb nutrients such as ammonia nitrogen, nitrite, and nitrate. Through photosynthesis, the algae convert these nutrients into their own biomass, while releasing oxygen. This process not only effectively reduces the concentrations of ammonia nitrogen, nitrite, and nitrate in the water, mitigating their toxicity to temporarily held organisms, but also provides abundant algal food for these organisms. This algal food is rich in protein, fat, vitamins, and other nutrients, meeting the nutritional needs of the temporarily held organisms and promoting their healthy growth. Furthermore, algal photosynthesis increases dissolved oxygen levels in the water, improving the water quality of the temporarily held environment and benefiting the respiration and metabolism of the temporarily held organisms.

[0062] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A live seafood warehouse circular ecosystem, characterized by: It includes a biochemical module, a post-sand filter, a disinfection module, a photoreactor module, and a temporary holding module connected in sequence; The biochemical module includes multiple biochemical tanks and at least one nitrification tank. The multiple biochemical tanks are respectively connected in parallel with the same nitrification tank. The water treated by the biochemical module is transported to the post-sand filter. The post-sand filter is used to filter water that has been treated by the biochemical module; The disinfection module is used for sterilization; The photoreaction module is used for algae cultivation; The temporary holding module is used to receive algae feed from the photoreaction module and to carry out short-term feeding of live aquatic products.

2. The live fresh warehouse circulating ecosystem according to claim 1, characterized in that: The biochemical tank includes a tank body and a support frame and an aeration disc disposed inside the tank body; the support frame is fixedly connected to the inner wall of the tank body by a crossbeam and a gap is provided between the bottom surface of the support frame and the bottom of the tank body, and the bottom surface of the support frame is a grid structure; biological filter media is provided inside the support frame; the aeration disc is disposed below the support frame; a sewage outlet is provided on the bottom left side of the tank body, and the sewage outlet is connected to a sewage suction pump.

3. The live fresh warehouse circulating ecosystem according to claim 2, characterized in that: It also includes a reciprocating travel mechanism, which is located below the aeration disc and is equipped with a scraper. When the scraper travels from right to left, its outer edge approaches the bottom of the main body of the pool, and when it travels from left to right, its outer edge approaches the bottom of the aeration disc.

4. The live fresh warehouse circulating ecosystem according to claim 3, characterized in that: The bottom surface of the pool body is sloped, tilting upwards from left to right.

5. The live fresh warehouse circulating ecosystem according to claim 4, characterized in that: The biological treatment tank is equipped with a water quality monitoring module, which includes at least an OPR meter, a pH meter, or a turbidity meter; and / or It also includes a pH adjustment device, which is used to adjust the pH value of the biological treatment tank or the nitrification tank.

6. The live fresh warehouse circulating ecosystem according to claim 1, characterized in that: It also includes a pre-sand filter, one end of which is connected to a water source and the other end is connected to the biochemical module.

7. The live fresh warehouse circulating ecosystem according to claim 6, characterized in that: It also includes an ultrafiltration device, which is located between the pre-sand filter and the nitrification tank.

8. The live fresh warehouse circulating ecosystem according to claim 1, characterized in that: It also includes a residual chlorine detection device, and each of the biochemical tanks is equipped with a residual chlorine detection device.

9. The live fresh warehouse circulating ecosystem according to claim 1, characterized in that: The disinfection module is an electrodeless ultraviolet lamp.

10. The live fresh warehouse circulating ecosystem according to claim 1, characterized in that: The capacity of the photoreaction module is 1-5 times the capacity of the biochemical pool.

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