Fish and vegetable symbiotic system and water circulation purification method thereof

Abstract

The invention discloses a fish and vegetable symbiotic system and a water circulation purification method thereof. The symbiotic system comprises a fish pond, a cultivation tank, a water conveying device, a water pumping device, an ion generator and a control unit. The method comprises the steps of water circulation purification, ion purification, dynamic water quality monitoring and intelligent regulation and control. Through the design of the cultivation tank, the water pumping device, the water conveying device, the ion generator, the water quality sensor and the control unit, water in the fishpond circularly flows and is purified between the fishpond and the cultivation tank, ions are released by the ion generator to assist purification, the survival rate of fishes is increased, and the morbidity is reduced. The purposes of reducing water changing frequency, disinfectant dosage and wastewater discharge are achieved, the environment is effectively protected, water resources are saved, and economic benefits are increased.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture and hydroponic agriculture, and in particular to a fish-vegetable symbiotic system and a water circulation purification method thereof. Background Art

[0002] During high-density fish farming, fish excrement, uneaten feed residues, and metabolic products from the farming process accumulate in large quantities due to the high stocking density, leading to deterioration of water quality and causing the following harm to the ecological environment:

[0003] 1. Water pollution

[0004] Fish metabolize large amounts of harmful substances such as ammonia nitrogen, nitrite, and nitrate. If these substances are not promptly treated, they can lead to eutrophication, causing water degradation, algae blooms, and even hypoxia, posing a serious threat to aquatic ecosystems.

[0005] Organic matter such as fish excrement and uneaten feed accumulates in the water, causing the dissolved oxygen concentration in the water to decrease, and may even form an anaerobic environment, producing toxic gases such as hydrogen sulfide, further endangering the aquaculture environment and water quality.

[0006] 2. High-concentration wastewater discharge

[0007] Many traditional fish farming systems remove wastewater by constantly replacing the water source. While this "dilution method" can address water quality issues in the short term, it consumes significant amounts of water resources and releases pollutants into the environment, burdening surrounding water bodies. High-density aquaculture requires large quantities of water to replace polluted water, but this consumes enormous amounts of water resources. In some water-scarce regions, this practice exacerbates water shortages and leads to unsustainable water use.

[0008] Some small or medium-sized farms fail to be equipped with effective wastewater treatment systems, resulting in wastewater being discharged directly into surrounding waters, causing serious environmental pollution.

[0009] 3. Chemical pollutants and drug residues

[0010] To prevent and control aquatic diseases, fish farms often use chemicals and antibiotics. If these chemicals are not effectively treated, they can remain in the water and enter the food chain, affecting aquatic life and human health. Long-term use of antibiotics can also lead to the development of drug-resistant bacteria, increasing public health risks.

[0011] Since feed may contain certain heavy metals or other harmful chemicals, these substances gradually accumulate through water bodies and sediments, affecting the quality and ecological safety of the breeding environment.

[0012] Therefore, in order to ensure the health and sustainable development of the aquaculture environment, sewage treatment and sewage discharge have become key links. At present, the main sewage treatment methods include traditional physical treatment methods (such as sedimentation and filtration), chemical treatment methods (such as flocculation and sedimentation) and biological treatment methods (such as biological filters, artificial wetlands, etc.). Although these methods can remove some pollutants, they are often inefficient, and the treated wastewater still contains high concentrations of pollutants such as nitrogen and phosphorus, which cannot meet environmental emission standards. In addition, in recent years, although the recirculating aquaculture system (RAS) can partially improve water quality, the equipment is complex and the cost is high.

[0013] Therefore, there is an urgent need for a low-cost, high-efficiency integrated water quality management solution. Summary of the Invention

[0014] The present invention can solve the above-mentioned defects in the prior art aquaculture technology by providing a fish-vegetable symbiotic system and a water circulation purification method thereof.

[0015] In order to solve the above technical problems, the present invention provides a fish-vegetable symbiotic system, characterized by comprising:

[0016] Fish pond, equipped with water quality sensors;

[0017] Cultivation trough with ceramsite matrix;

[0018] a water delivery device, connecting the fish pond and the cultivation trough, and delivering water in the fish pond into the cultivation trough;

[0019] a pumping device connected to the fish pond and the cultivation trough to pump water in the cultivation trough into the fish pond;

[0020] an ion generator, installed on the water inlet of the fish pond or on the pipe of the pumping device;

[0021] The control unit is connected to the water quality sensor and the ion generator, and adjusts the release rate of the ion generator in real time according to the water quality data.

[0022] In a preferred embodiment of the present invention, the pumping device includes a water pump and a water pipe. The water pump is independently arranged from the cultivation trough and the fish pond, and its water inlet end and water outlet end are respectively connected to the cultivation trough and the fish pond through water pipes.

[0023] In a preferred embodiment of the present invention, the water delivery device includes a submersible pump and a water pipe. The submersible pump is arranged in the fish pond, and its water outlet end is connected to the cultivation tank through the water pipe.

[0024] In a preferred embodiment of the present invention, the stocking density of fry in the fish pond is 8-12 kg / m 3 The water volume ratio of the cultivation tank to the fish pond is 1:3 to 1:5.

[0025] In a preferred embodiment of the present invention, the ions released by the ion generator include silver ions, copper ions or a combination thereof.

[0026] In a preferred embodiment of the present invention, an oxygen pump is provided in the fish pond, and a plastic net and a wooden cover are provided on the top of the fish pond.

[0027] To solve the above technical problems, the present invention further provides a water circulation management method for a fish-vegetable symbiotic system, comprising the following steps:

[0028] (1) Water circulation purification: the water delivery device and the water pumping device are respectively turned on to circulate the water in the fish pond in the direction of fish pond-water delivery device-cultivation tank-water pumping device-fish pond, thereby performing water circulation purification;

[0029] (2) Ion purification: turning on the ion generator to release ions into the water to purify the water quality;

[0030] (3) Dynamic water quality monitoring and intelligent regulation: The water quality sensor monitors the concentrations of ammonia nitrogen, nitrite and microorganisms in the fish pond water in real time and feeds back to the control unit, which then adjusts the operating parameters of the ion generator to maintain the ion concentration at a safe threshold of 0.5-2.0 mg / L.

[0031] In a preferred embodiment of the present invention, the release rate of the ions is 0.1-0.3 mg / min.

[0032] The beneficial effects of the present invention are as follows: the present invention provides a fish-vegetable symbiotic system and a water circulation purification method thereof, which realizes the circulation and purification of water in the fish pond between the fish pond and the cultivation trough through the design of the cultivation trough, the pumping device, the water delivery device, the ion generator, the water quality sensor and the control unit, and the ion generator releases ions to assist in purification, thereby achieving the purpose of improving the survival rate of fish, reducing the incidence rate, reducing the frequency of water changes and the amount of disinfectants used, and reducing wastewater discharge, effectively protecting the environment, saving water resources, and increasing economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a front view structural diagram of a preferred embodiment of a fish-vegetable symbiotic system of the present invention;

[0034] The markings of the components in the accompanying drawings are as follows:

[0035] 10. Fish pond, 11. Water quality sensor, 12. Oxygen pump, 20. Cultivation tank, 30. Submersible pump, 40. Suction pump, 50. Ion generator. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0037] See also Figure 1 , embodiments of the present invention include:

[0038] Example 1

[0039] A fish-vegetable symbiotic system includes: a fish pond 10, a cultivation tank 20, a water delivery device, a water pumping device, an ion generator 50 and a control unit.

[0040] The fish pond 10 is a circular structure with a diameter of 1.8m and a height of 1.2m, and the actual water capacity is 2045L. The stocking density of the fry in the fish pond 10 is 10kg / m 3 The fry size is 1,000 per kilogram.

[0041] The fish pond 10 is provided with a water quality sensor 11 and an aerator 12. The water quality sensor 11 is used to monitor the concentration of ammonia nitrogen, nitrite and microorganisms in the fish pond water in real time and to feed back to the control unit. The aerator 12 is used to replenish the dissolved oxygen content in the fish pond. In this embodiment, the brand / model of the aerator 12 is YASHIBA, with a voltage of 220V / 50HZ, a power of 75W, and an air flow of 145m 3 / h, the maximum aeration water depth is 1m, the maximum suction pressure is 20kPa, and the maximum wind pressure is 21kPa.

[0042] The top of the fish pond 10 is sequentially provided with a plastic net and a wooden cover from bottom to top. The plastic net does not need to be opened when feeding bait to prevent fish from jumping out due to scrambling for food; the wooden cover can play the role of creating shade and avoiding light.

[0043] In this embodiment, the cultivation troughs 20 are rectangular structures measuring 7.5m x 1.2m x 0.3m in length, width, and height, and there are nine of them. Each cultivation trough 20 is filled with ceramsite as a matrix, which not only retains moisture and anchors plant roots, but also effectively filters floating debris from aquaculture wastewater. The plant roots and ceramsite double as filters for waste generated by fish pond aquaculture, forming a biofilm and producing beneficial microorganisms.

[0044] The water volume ratio of the cultivation trough 20 and the fish pond 10 is controlled to be 1:4 to ensure the purification effect of the fish pond water.

[0045] The water delivery device includes a submersible pump 30 and a water pipe. The specifications of the submersible pump 30 are: X3340 Xilong, power: 45W, maximum head: 2.4M, maximum flow: 1800L / h.

[0046] The submersible pump 30 is arranged in the fish pond 10, and its outlet end is connected to the cultivation tank 20 through a water pipe, so that part of the water in the fish pond is evenly input into each cultivation tank. On the one hand, the water is purified under the action of the plant roots and ceramsite in the cultivation tank. On the other hand, the organic matter contained in the water can provide oxygen to the plants and prevent the growth difference of the plants in each cultivation tank from being too large due to uneven moisture.

[0047] The pumping device includes a pump 40 and water pipes. The pump 40 is installed independently of the cultivation trough 20 and the fish pond 10. Its water inlet and outlet are connected to the cultivation trough 20 and the fish pond 10 respectively through water pipes. The pumping device is used to extract a portion of the filtered and purified water in the cultivation trough 20 and return it to the fish pond 10, while the remaining water remains in the cultivation trough 20.

[0048] The ion generator 50 is integrated into the water inlet of the fish pond 10 or the water pipe of the pumping device to ensure sufficient ion dispersion and avoid localized excessive concentrations. The ion generator can release ions including silver ions, copper ions, or a combination thereof at a release rate of 0.1-0.3 mg / min. The operating voltage of the ion generator 50 is 12-24V and the power is 10-30W.

[0049] The control unit is connected to the water quality sensor 11 and the ion generator 50. The water quality sensor 11 monitors the water quality in the fish pond 10 in real time and transmits relevant data to the control unit. The control unit adjusts the release rate of the ion generator 50 in real time according to the water quality data to ensure that the ion concentration is within the safety threshold, taking into account the safety of fish and plants.

[0050] The water circulation purification method of the above-mentioned fish-vegetable symbiotic system includes the following steps:

[0051] (1) Constructing a circulating water system: a submersible pump 30 is arranged in the fish pond 10 and connected to the cultivation tank 20 via a water pipe; a water pump 40 is arranged between the fish pond 10 and the cultivation tank 20 and connected to the fish pond 10 and the cultivation tank 20 via water pipes, so that the water in the fish pond forms a water circulation path in the direction of fish pond-submersible pump-cultivation tank-water pump-fish pond;

[0052] (2) Recycling: The water in the fish pond is partially pumped into the cultivation tank by the submersible pump 30, and the purified water in the cultivation tank is then input into the fish pond by the pumping pump to complete the purification of the aquaculture wastewater;

[0053] (3) Intelligent control: The water quality sensor monitors the concentrations of ammonia nitrogen, nitrite, and microorganisms in the fish pond water in real time and feeds back to the control unit. The control unit adjusts the operating parameters of the ion generator based on the water quality data and regulates the ion release rate to maintain the ion concentration at a safe threshold of 0.5-2.0 mg / L.

[0054] (1) Water circulation purification: The same amount of water is input into each of the nine cultivation tanks 20, and the ratio of the total water volume in the fish pond to the total water volume in the nine cultivation tanks is maintained at 4:1;

[0055] The submersible pump 30 in the water delivery device and the water pump 40 in the water pumping device are respectively turned on to circulate the water in the fish pond in the direction of the fish pond-water delivery device-cultivation tank-water pumping device-fish pond for water circulation purification. The water volume delivered by the submersible pump 30 and the water pump 40 is made equal, ensuring that the ratio of the total water volume in the fish pond and the cultivation tank is maintained at a ratio of 4:1.

[0056] (2) Ion purification: Turn on the ion generator 50 and release ions into the water at a rate of 0.2 mg / min to purify the water;

[0057] (3) Dynamic water quality monitoring and intelligent regulation: The water quality sensor monitors the concentrations of ammonia nitrogen, nitrite and microorganisms in the fish pond water in real time and feeds back to the control unit. The control unit then adjusts the speed at which the ion generator releases ions to maintain the ion concentration at a safe threshold of 1.5 mg / L.

[0058] Example 2

[0059] The difference from Example 1 is that the stocking density of fry in the fish pond is 12kg / m 3 , fry specifications and other conditions are the same as those in Example 1.

[0060] Comparative Example 1

[0061] The difference from Example 1 is that no ion generator is installed in the fish-vegetable symbiosis system.

[0062] After the aquaponics systems in Example 1, Example 2, and Comparative Example 1 were operated for 3 months, water from the fish ponds was collected for testing and analysis. The results are shown in Table 1 below.

[0063] Table 1

[0064] Example 1 Example 2 Comparative Example 1 Nitrate (mg / mL) 45 60 80 Total bacterial count (cfu / mL) 3000 3600 10000 Nitrite (mg / mL) 0.2 0.24 0.3 Total ammonia nitrogen (mg / mL) 1 1.2 2 Escherichia coli count (cfu / mL) 1000 1300 2000 Survival rate (%) 90 86 80

[0065] Comparing the data in Table 1, it can be seen that the aquaponics system of the present invention exhibits significant advantages in water purification and system operation. First, in terms of water quality improvement, the nitrate, nitrite, and total ammonia nitrogen contents in Examples 1 and 2 were significantly lower than those in Comparative Example 1, effectively reducing the accumulation of harmful substances in the water and lowering the risk of eutrophication and fish poisoning. The total bacterial count and E. coli count were also significantly lower than those in Comparative Example 1, indicating that the ion generator has a good inhibitory effect on harmful microorganisms, thereby improving water hygiene and food safety.

[0066] Furthermore, by organically integrating an ion generator with a fish-vegetable symbiotic system, this method achieves coordinated control of multiple harmful indicators, improves water recycling efficiency, reduces reliance on disinfectants, and lowers operating costs. Results show that fish survival rates are superior to those in the control group, achieving both environmental and economic benefits.

[0067] The data in Table 1 fully demonstrate the comprehensive advantages of the present invention in terms of water quality, microbial control, system stability and sustainable development, and it has broad prospects for promotion and application.

[0068] The aquaponics system and water circulation management method of the present invention have the following beneficial effects:

[0069] 1. The stability of water quality is enhanced, effectively inhibiting the growth of harmful bacteria, algae and other microorganisms, reducing harmful substances such as ammonia nitrogen and nitrite, making the water clear and transparent, and improving the recycling rate.

[0070] 2. Fish and vegetables grow healthily, fish survival rate is improved, disease incidence is reduced, vegetable roots are clean and free of rot, growth rate is accelerated, and yield and quality are better than traditional systems.

[0071] 3. Operating costs are reduced, the frequency of water changes and the amount of disinfectants used are reduced, the workload of manual maintenance is reduced, and the system is more suitable for large-scale continuous operation.

[0072] 4. The ecological and economic benefits are improved, the system is more environmentally friendly, and the risk of wastewater discharge and drug residues is reduced. It is suitable for promotion and application in families, schools, communities and large and medium-sized commercial farms.

[0073] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fish-vegetable symbiotic system, characterized in that: include: Fish pond, equipped with water quality sensors; Cultivation trough with ceramsite matrix; a water delivery device, connecting the fish pond and the cultivation trough, and delivering water in the fish pond into the cultivation trough; a pumping device connected to the fish pond and the cultivation trough to pump water in the cultivation trough into the fish pond; an ion generator, installed on the water inlet of the fish pond or on the pipe of the pumping device; The control unit is connected to the water quality sensor and the ion generator, and adjusts the release rate of the ion generator in real time according to the water quality data.

2. The fish-vegetable symbiotic system according to claim 1, characterized in that: The pumping device includes a water pump and a water pipe. The water pump is independently arranged from the cultivation trough and the fish pond. The water inlet end and the water outlet end of the pump are respectively connected to the cultivation trough and the fish pond through the water pipe.

3. The fish-vegetable symbiotic system according to claim 2, characterized in that: The water delivery device comprises a submersible pump and a water pipe. The submersible pump is arranged in the fish pond, and the water outlet end of the submersible pump is connected with the cultivation trough through the water pipe.

4. The fish-vegetable symbiotic system according to claim 1, characterized in that: The stocking density of fry in the fish pond is 8-12 kg / m 3 The water volume ratio of the cultivation tank to the fish pond is 1:3 to 1:

5.

5. The fish-vegetable symbiotic system according to claim 1, characterized in that: The ions released by the ion generator include silver ions, copper ions or a combination thereof.

6. The fish-vegetable symbiotic system according to claim 1, characterized in that: An oxygen pump is arranged in the fish pond, and a plastic net and a wooden cover are arranged on the top of the fish pond.

7. A water circulation management method for a fish-vegetable symbiotic system according to any one of claims 3 to 6, characterized in that: The steps include: (1) Water circulation purification: the water delivery device and the water pumping device are respectively turned on to circulate the water in the fish pond in the direction of fish pond-water delivery device-cultivation tank-water pumping device-fish pond, thereby performing water circulation purification; (2) Ion purification: turning on the ion generator to release ions into the water to purify the water quality; (3) Dynamic water quality monitoring and intelligent regulation: The water quality sensor monitors the concentrations of ammonia nitrogen, nitrite and microorganisms in the fish pond water in real time and feeds back to the control unit, which then adjusts the operating parameters of the ion generator to maintain the ion concentration at a safe threshold of 0.5-2.0 mg / L.

8. The fish-vegetable symbiotic system according to claim 7, characterized in that: The release rate of the ions is 0.1-0.3 mg / min.

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