Hydroponic system and hydroponic method using bubble floating vertical regulating pool

Abstract

The present invention discloses a hydroponic system and a hydroponic method using a vertical regulating pool with air bubbles floating on the surface. The hydroponic system includes a hydroponic pool, a hydroponic tank, a first regulating pool, a second regulating pool, a nutrient solution oxygenation and disinfection system, a nutrient solution pool, a nutrient solution water treatment system, and a monitoring controller. An independent small circulation unit is used to complete the internal circulation of the nutrient solution, a vertical regulating pool is used to regulate the water body and save kinetic energy, a nutrient solution oxygenation and disinfection system is used to oxygenate and disinfect the nutrient solution, and water quality is controlled by online monitoring, so that large-scale hydroponic vegetables and flowers can be safely produced in batches.

Description

Technical Field

[0001] The invention relates to the field of agricultural production, and in particular to a hydroponic system and a hydroponic method. Background Art

[0002] At present, due to the limitation of land area, various regions have begun to vigorously carry out the research of soilless cultivation and carry out factory production. Among them, hydroponics is a modern agricultural cultivation method of soilless cultivation. Cultivating vegetables or flowers on a cultivation bed with a certain nutrient solution can overcome the problems of soil salinization, soil-borne diseases and other continuous cropping problems in traditional plant cultivation. It can also produce all year round to improve the yield and quality of plants.

[0003] Most large-scale factory-based hydroponic greenhouses use a large-area circulating nutrient solution method. Due to the recycling of the nutrient solution, it is easy to cause insufficient oxygen supply, root rot, and plant disease outbreaks.

[0004] In order to solve the above problems, the present invention proposes a novel hydroponic system and hydroponic method. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of high-efficiency and energy-saving hydroponic system and hydroponic method for industrial hydroponic greenhouses, which can safely produce large-scale hydroponic vegetables and flowers in batches.

[0006] According to a first aspect of the present invention, a hydroponic system (hydroponic device) using a bubble floating vertical regulating tank is provided, comprising a nutrient solution tank, a first hydroponic tank, a second hydroponic tank, a first regulating tank, a second regulating tank, a nutrient solution oxygenation and disinfection system, a tail water treatment system and a monitoring controller; wherein:

[0007] The nutrient solution tank is connected to the first regulating tank through a pipeline, the first regulating tank is connected to the water inlet of the first hydroponic tank, the water outlet of the first hydroponic tank is connected to the second regulating tank, the second regulating tank is connected to the second hydroponic tank, and the water outlet of the second hydroponic tank is connected to the first regulating tank;

[0008] The first regulating pool and the second regulating pool have the same structure, the top elevations of the first regulating pool and the second regulating pool are higher than the first hydroponic pool and the second hydroponic pool, respectively, and the bottom elevations of the water inlet ends of the first hydroponic pool and the second hydroponic pool are higher than the bottom elevations of the water outlet ends, thereby forming a water body circulation among the first regulating pool, the first hydroponic pool, the second regulating pool, and the second hydroponic pool;

[0009] The first regulating tank and the second regulating tank are arranged vertically, and the elevation of the water inlet is lower than that of the water outlet. Air pumps are respectively arranged adjacent to the first regulating tank and the second regulating tank. The air outlet pipeline of the air pump extends into the regulating tank, and the air outlet of the air outlet pipeline is arranged at the bottom of the regulating tank. The bottom of the regulating tank is inflated by the air pump, and the water body is transported to the hydroponic pool by the buoyancy pressure of the bubbles.

[0010] The water outlets of the first hydroponic pool and the second hydroponic pool are also connected to the nutrient solution oxygenation and disinfection system respectively, and the nutrient solution oxygenation and disinfection system is connected to the nutrient solution pool to form an extracorporeal water circulation;

[0011] The water outlets of the first hydroponic pool and the second hydroponic pool are also connected to the tail water treatment system respectively.

[0012] In a specific case, a heating device, a dissolved oxygen / ammonia nitrogen / temperature sensor are provided in the first regulating tank and the second regulating tank, and are respectively connected to a monitoring controller.

[0013] Specifically, the first hydroponic pool and the second hydroponic pool have the same structure, both including a hydroponic area and a filter tank, separated by a partition board, the partition board is covered with holes, the water inlet of the hydroponic pool is set at one end of the hydroponic area, and the water outlet of the hydroponic pool is set at one end of the filter tank.

[0014] Preferably, a plurality of hydroponic troughs are arranged side by side in the hydroponic area, and seedling fixing holes are provided on the hydroponic troughs. A groove is provided on the outer wall of each hydroponic trough, and a distance adjustment buckle is embedded in the groove. The distance adjustment buckle adopts an irregular hexagonal shape, so that adjacent hydroponic troughs are not easily scratched and will not fit tightly.

[0015] Specifically, the nutrient solution oxygenation and disinfection system includes a micro-nano bubble generator, an oxygen generator and an ozone generator.

[0016] Specifically, the tailwater treatment system includes a biological treatment device, an aeration device and a disinfection device.

[0017] According to a second aspect of the present invention, there is provided a hydroponic method, comprising the following steps:

[0018] (1) Providing the hydroponic system according to the first aspect of the present invention;

[0019] (2) a nutrient solution suitable for hydroponic plants is prepared in the nutrient solution tank, and the nutrient solution enters the first regulating tank through the external water inlet pipe of the first regulating tank;

[0020] (3) The sensors in the first regulating tank monitor the dissolved oxygen, temperature, and ammonia nitrogen in the water in real time, and ventilate the bottom of the tank through an air pump to lift the nutrient solution from underground to the outlet and into the hydroponic tank; when the water temperature is too low, the heating device will be controlled to heat the water until the temperature meets the requirements;

[0021] (4) The hydroponic tanks are evenly distributed in the hydroponic pool, and the hydroponic plants are planted in the hydroponic tanks, and the roots are immersed in the nutrient solution; the nutrient solution flows by gravity through the first hydroponic pool into the second regulating pool, and the water body is monitored in real time for dissolved oxygen, temperature, and ammonia nitrogen in the second regulating pool, and enters the second hydroponic pool through the second regulating pool; the nutrient solution flows by gravity through the second hydroponic pool into the first regulating pool, thus completing the internal circulation process of the independent small unit;

[0022] (5) During the internal circulation process, samples will be taken regularly to detect the number of bacteria and pathogens in the water and the dissolved oxygen. When the water indicators do not meet the standards, the circulating water in the hydroponic pool will be passed into the nutrient solution oxygenation and disinfection system, and the water will be oxygenated and disinfected before entering the nutrient solution pool. The nutrient solution after the external circulation will return to the internal circulation system to ensure that the water meets the needs of hydroponic plants;

[0023] (6) When the nutrient solution of the entire internal circulation system needs to be replaced, the circulating water of the hydroponic pool is transported to the tailwater treatment system for wastewater treatment, and then discharged or reused after meeting the standards;

[0024] (7) The entire hydroponic process is monitored by a monitoring controller, and the system is precisely controlled through sensors at various fixed points to ensure normal operation of the system.

[0025] The advantages of the present invention are:

[0026] (1) The two groups of hydroponic pools are used as an independent circulation unit for easy management and maintenance. In addition, the independent units can be stacked to expand the scale, which is convenient for promotion and monitoring.

[0027] (2) The front and rear ends of the hydroponic tank are isolated by distance adjustment buckles, which does not affect the use and is easy to separate, reducing the difficulty of daily operation.

[0028] (3) Use a vertical regulating tank to utilize the upward pressure of bubbles to send water to the hydroponic pool and increase the dissolved oxygen in the water, so that the plant roots maintain a good dissolved oxygen environment and save kinetic energy.

[0029] (4) Monitor the dissolved oxygen, temperature, and ammonia nitrogen in the vertical regulating tank water, and control its parameters in real time to keep the circulating water in a good environmental state at all times.

[0030] (5) Use the nutrient solution oxygenation and disinfection system to oxygenate and disinfect the water, keeping the bacteria and dissolved oxygen in the water at a stable value to facilitate plant growth.

[0031] (6) A tailwater treatment system is set up at the end to treat the nutrient solution after crop replacement or use, so that it can be discharged or reused in compliance with the standards, thus saving energy and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1Schematic diagram of the overall structure of the hydroponic system according to the present invention.

[0033] Figure 2-4 They are respectively a front view, a left view and a top view of the regulating tank in the hydroponic system according to the present invention.

[0034] Figure 5 It is a schematic diagram of the structure of a hydroponic pool in a hydroponic system according to the present invention.

[0035] Figure 6-7 They are respectively a top view and a side view of the hydroponic tank of the present invention.

[0036] 1: The first hydroponic pond

[0037] 1-1: Hydroponic area

[0038] 1-2: Filter tank

[0039] 1-3: Spacer

[0040] 1-4: Water inlet of hydroponic pool

[0041] 1-5: Water outlet of hydroponic pool

[0042] 2: Hydroponic tank

[0043] 2-1: Partition

[0044] 2-2: Slotting

[0045] 2-3: Distance adjustment buckle

[0046] 2-4: Seedling fixing hole

[0047] 3: The first regulating pool

[0048] 3-1: Air Pump

[0049] 3-2: Intake duct

[0050] 3-3: Heating rod

[0051] 3-4: Dissolved oxygen / ammonia nitrogen / temperature sensor

[0052] 3-5: Water inlet of regulating pool

[0053] 3-6: Regulating pool outlet

[0054] 3-7: Cable arrangement hole

[0055] 4: Second regulating pool

[0056] 5: Nutrient solution oxygenation and disinfection system

[0057] 6: Nutrient solution pool

[0058] 7: Tailwater treatment system

[0059] 8: Standard discharge pool

[0060] 9: The first external circulation pipe

[0061] 10: First internal circulation pipe

[0062] 11: Second internal circulation pipe

[0063] 12: The third internal circulation pipe

[0064] 13: The fourth internal circulation pipe

[0065] 14: Second external circulation pipe

[0066] 15: The third external circulation pipe

[0067] 16: Water treatment pipe

[0068] 17: Standard discharge pipe

[0069] 18: Monitoring controller

[0070] 20: Second hydroponic pool DETAILED DESCRIPTION

[0071] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are all commercially available products.

[0072] See also Figure 1 The hydroponic system according to the present invention mainly includes a nutrient solution tank 6, a first hydroponic tank 1, a second hydroponic tank 20, a first regulating tank 3, a second regulating tank 4, a nutrient solution oxygenation and disinfection system 5, a tail water treatment system 7 and a monitoring controller 18.

[0073] The nutrient solution tank 6 is connected to the first regulating tank 3 through the first external circulation pipe 9, the first regulating tank 3 is connected to the water inlet of the first hydroponic tank through the first internal circulation pipe 10, the water outlet of the first hydroponic tank is connected to the second regulating tank 4 through the second internal circulation pipe 11, the second regulating tank 4 is connected to the second hydroponic tank 20 through the third internal circulation pipe 12, and the water outlet of the second hydroponic tank is connected to the first regulating tank 3 through the fourth internal circulation pipe 13, forming a water body internal circulation system.

[0074] The water outlets of the first hydroponic pool 1 and the second hydroponic pool 20 are also connected to the nutrient solution oxygenation and disinfection system 5 through the second external circulation pipe 14, and the nutrient solution oxygenation and disinfection system 5 is connected to the nutrient solution pool 6 through the third external circulation pipe 15 to form a water extracorporeal circulation system.

[0075] The water outlets of the first hydroponic pool 1 and the second hydroponic pool 20 are also connected to the tail water treatment system 7 through the water treatment pipe 16. The tail water treatment system 7 is connected to the standard discharge pool 8 through the standard discharge pipe 17.

[0076] The first regulating pool 3 and the second regulating pool 4 are mainly responsible for regulating the water body, and their structures and functions are completely the same. Figure 2-4 , the structure of the regulating tank in the present invention is introduced by taking the first regulating tank 3 as an example, including an air pump 3-1, an air inlet pipe 3-2, a heating rod 3-3, a dissolved oxygen / ammonia nitrogen / temperature sensor 3-4, a regulating tank water inlet 3-5, a regulating tank water outlet 3-6, and a cable arrangement hole 3-7. The air pump 3-1 is connected to the air inlet pipe 3-2, and an aerator is arranged at the air outlet of the air inlet pipe 3-2, and the aerator is arranged at the bottom of the first regulating tank 3. The bottom of the regulating tank is inflated by the air pump 3-1, and the water body is transported to the hydroponic pool by the buoyancy pressure of the bubbles, and the dissolved oxygen, ammonia nitrogen and temperature of the water body are monitored in real time by the dissolved oxygen / ammonia nitrogen / temperature sensor 3-4 equipped therein. When the temperature is insufficient, heating is performed through the heating rod 3-3. When the ammonia nitrogen does not meet the requirements, the water body is treated through the tailwater treatment system 7. When the dissolved oxygen is insufficient, the air intake of the air pump 3-1 is increased and the nutrient solution oxygenation and disinfection system 5 is used to oxygenate it. This series of operations will be controlled and implemented by the monitoring controller 18, and its monitoring probe can enter the regulating tank water body through the cable arrangement hole 3-7.

[0077] The design bottom elevation of the regulating pond is -2m, the elevation of the regulating pond inlet 3-5 is 0.2m, and the elevation of the regulating pond outlet 3-6 is 0.6m. The elevation of the inlet is lower than the elevation of the outlet, and its inlet cross section is 3 times the cross section of the outlet. The outlet is divided into 3 pipes of equal diameter to ensure that its outlet pressure is less than the inlet pressure, and the highest water level of the regulating pond is flush with the hydroponic pool to ensure that its nutrient solution is evenly distributed and dispersed into the hydroponic pool to avoid backflow. According to research, under the same oxygenated aeration flow rate and aeration tube length, the amount of bubble water generated is the same. As the aeration tube is submerged deeper, the initial diameter of the bubble becomes smaller, resulting in two situations: increasing the specific surface area and increasing the oxygen mass transfer volume coefficient, and on the other hand, weakening the stirring and diffusion effect of the bubble. In shallow water (waters below 1.5m), the contribution rate of oxygen mass transfer on the water surface to the total mass transfer is about 80% or more, while the contribution rate of oxygen mass transfer inside the water body is not large. When using bottom aeration for oxygenation, the water body can form up and down convection, and the strong stirring effect produced by the buoyancy of bubbles makes the diffusion in the water essentially a violent motion process, and its turbulent diffusion rate is much greater than the molecular diffusion rate. Therefore, the diameter of the regulating pool used in the present invention is slightly larger than the diameter of the water inlet, which increases the stirring and diffusion effect of the bubbles, and the bottom elevation is selected to be -2m, and the overall water depth is about 3m, which increases the oxygen mass transfer contribution rate inside the water body. In the actual operation process, a certain range can be adjusted accordingly to ensure its optimized oxygenation effect.

[0078] The first hydroponic pool 1 and the second hydroponic pool 20 have the same structure and function. Figure 5 , the structure of the hydroponic pool in the present invention is introduced by taking the first hydroponic pool 1 as an example. The first hydroponic pool 1 includes a hydroponic area 1-1, a filter tank 1-2, a partition 1-3, a hydroponic pool water inlet 1-4, and a hydroponic pool water outlet 1-5. The hydroponic area 1-1 and the filter tank 1-2 are separated by a partition 1-3, and the partition 1-3 is covered with small holes. The hydroponic pool water inlet 1-4 is set at one end of the hydroponic area 1-1, and the hydroponic pool water outlet 1-5 is set at one end of the filter tank 1-2. The nutrient solution enters the hydroponic area 1-1 from the hydroponic pool water inlet 1-4 respectively, and the partition 1-3 blocks large particles and debris in the water body in the hydroponic area 1-1, and is simply filtered through the filter tank 1-3 to prevent debris from entering the hydroponic pool water outlet 1-5 and clogging the pipeline. The nutrient solution enters the second regulating pool 4, the second hydroponic pool 20 and the first regulating pool 3 through the hydroponic pool water outlet 1-5 for internal circulation.

[0079] See also Figure 6-7The hydroponic pool is evenly distributed with hydroponic troughs, and the hydroponic trough 2 includes a partition 2-1, a slot 2-2, a distance adjustment buckle 2-3, and a seedling fixing hole 2-4. The partition 2-1 of the hydroponic trough 2 separates each vegetable separately, which is convenient for seedling cultivation, growth and harvesting. Slots 2-2 are made at both ends of the outer wall of the hydroponic trough 2, and distance adjustment buckles 2-3 are embedded in the slots 2-2. The distance adjustment buckles 2-3 are irregularly hexagonal in shape, which increases its friction so that the hydroponic trough is not easy to be cut open and will not fit tightly. This can also prevent the hydroponic troughs from being difficult to separate due to the viscosity of water, thereby improving the operating efficiency. The seedling fixing hole 2-4 fixes the vegetables or flowers in the hydroponic trough, and the roots are immersed in the nutrient solution to absorb nutrients.

[0080] The nutrient solution oxygenation and disinfection system 5 includes a micro-nano bubble generator, an oxygen generator, an ozone generator and other equipment. The structure of the system is well known to those skilled in the art, and a detailed description thereof is omitted here. The micro-nano oxygenation and disinfection technology is adopted, and the micro-nano bubbles have the advantages of slow rise, long residence time in water, negatively charged, strong oxidizing free radicals, etc., and ozone is used to disinfect the nutrient solution through micro-nano technology, which has a very good control effect on pathogens.

[0081] The tailwater treatment system 7 includes water treatment equipment such as biological treatment devices, aeration devices, and disinfection devices to ensure that the effluent meets the reuse and discharge standards.

[0082] Specific example: A greenhouse hydroponic project

[0083] There are 8 hydroponic pools in the greenhouse, and every 2 hydroponic pools form an independent small cycle. Each hydroponic pool is 9×40m, sharing a set of nutrient solution oxygenation and disinfection system 5 and tail water treatment system 7.

[0084] The specific steps are as follows:

[0085] (1) A nutrient solution suitable for hydroponic vegetables is prepared in the nutrient solution tank 6 , and the nutrient solution enters the first regulating tank 3 through the first external circulation pipe 9 .

[0086] (2) The dissolved oxygen / ammonia nitrogen / temperature sensor 3-4 in the first regulating tank 3 monitors the dissolved oxygen, temperature, and ammonia nitrogen in the water in real time, and ventilates the bottom of the tank through the air pump 3-1, lifting the nutrient solution from 2m underground to the outlet 3-6 of the regulating tank, and entering the hydroponic tank through the first internal circulation pipe 10. When the water temperature is too low, the heating rod 3-3 will be controlled to heat the water until the temperature meets the requirements.

[0087] (3) The hydroponic tanks 2 are evenly distributed in the hydroponic pool. The hydroponic tanks are used to grow seasonal hydroponic vegetables, and their roots are immersed in the nutrient solution. The nutrient solution flows by gravity through the second internal circulation pipe 11 into the second regulating pool 4. The water body is monitored for dissolved oxygen, temperature, and ammonia nitrogen in real time in the second regulating pool 4, and enters the second hydroponic pool 20 through the third internal circulation pipe 12. The nutrient solution flows by gravity through the fourth internal circulation pipe 13 into the first regulating pool 3, thus completing the entire circulation process of the independent small unit.

[0088] (4) During the internal circulation process, samples will be taken regularly to detect the number of bacteria and pathogens in the water and the dissolved oxygen. When the water indicators do not meet the standards, the circulating water in the hydroponic pool will be passed into the nutrient solution oxygenation and disinfection system 5. After the water is oxygenated and disinfected, it will enter the nutrient solution pool 6. The nutrient solution returns to the internal circulation system to ensure that the water meets the needs of hydroponic vegetables.

[0089] (5) When the nutrient solution of the entire internal circulation system needs to be replaced, the circulating water of the hydroponic pool is transported to the tail water treatment system 7 for wastewater treatment, and is discharged or reused after meeting the standards.

[0090] (6) The entire hydroponic process is monitored by the monitoring controller 18, and the system is precisely controlled through sensors at various fixed points to ensure the normal operation of the system.

[0091] After using the hydroponic method of the present invention, vegetables grow well, the operation is simple and convenient, and labor is saved.

[0092] It should be noted that the above-described specific embodiments can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Based on the present invention, some modifications or improvements can be made thereto, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed in the present invention.

Claims

1. A hydroponic system using a bubble floating vertical regulating pond, characterized in that: It includes a nutrient solution tank, a first hydroponic tank, a second hydroponic tank, a first regulating tank, a second regulating tank, a nutrient solution oxygenation and disinfection system, a tail water treatment system and a monitoring controller; wherein: The nutrient solution tank is connected to the first regulating tank through a pipeline, the first regulating tank is connected to the water inlet of the first hydroponic tank, the water outlet of the first hydroponic tank is connected to the second regulating tank, the second regulating tank is connected to the second hydroponic tank, and the water outlet of the second hydroponic tank is connected to the first regulating tank; The first regulating pool and the second regulating pool have the same structure, the top elevations of the first regulating pool and the second regulating pool are higher than the first hydroponic pool and the second hydroponic pool, respectively, and the bottom elevations of the water inlet ends of the first hydroponic pool and the second hydroponic pool are higher than the bottom elevations of the water outlet ends, thereby forming a water body circulation among the first regulating pool, the first hydroponic pool, the second regulating pool, and the second hydroponic pool; The first regulating tank and the second regulating tank are arranged vertically, and the elevation of the water inlet is lower than that of the water outlet. Air pumps are respectively arranged adjacent to the first regulating tank and the second regulating tank. The air outlet pipeline of the air pump extends into the regulating tank, and the air outlet of the air outlet pipeline is arranged at the bottom of the regulating tank. The bottom of the regulating tank is inflated by the air pump, and the water body is transported to the hydroponic pool by the buoyancy pressure of the bubbles. The water outlets of the first hydroponic pool and the second hydroponic pool are also connected to the nutrient solution oxygenation and disinfection system respectively, and the nutrient solution oxygenation and disinfection system is connected to the nutrient solution pool to form an extracorporeal water circulation; The water outlets of the first hydroponic pool and the second hydroponic pool are also connected to the tail water treatment system respectively; The first regulating tank and the second regulating tank are provided with a heating device, a dissolved oxygen / ammonia nitrogen / temperature sensor, which are respectively connected to the monitoring controller; The first hydroponic pool and the second hydroponic pool have the same structure, both comprising a hydroponic area and a filter tank, separated by a partition plate in the middle, the partition plate is covered with holes, the water inlet of the hydroponic pool is arranged at one end of the hydroponic area, and the water outlet of the hydroponic pool is arranged at one end of the filter tank; The nutrient solution oxygenation and disinfection system includes a micro-nano bubble generator, an oxygen generator and an ozone generator.

2. The hydroponic system according to claim 1, characterized in that: The hydroponic area is provided with a plurality of hydroponic tanks arranged side by side, and the hydroponic tanks are provided with seedling fixing holes.

3. The hydroponic system according to claim 1, characterized in that: The tailwater treatment system includes a biological treatment device, an aeration device and a disinfection device.

4. A hydroponic method, characterized in that: The following steps are involved: (1) Providing a hydroponic system according to any one of claims 1 to 3; (2) a nutrient solution suitable for hydroponic plants is prepared in the nutrient solution tank, and the nutrient solution enters the first regulating tank through the external water inlet pipe of the first regulating tank; (3) The sensors in the first regulating tank monitor the dissolved oxygen, temperature, and ammonia nitrogen in the water in real time, and ventilate the bottom of the tank through an air pump to lift the nutrient solution from underground to the outlet and into the hydroponic tank; when the water temperature is too low, the heating device will be controlled to heat the water until the temperature meets the requirements; (4) The hydroponic tanks are evenly distributed in the hydroponic pool, and the hydroponic plants are planted in the hydroponic tanks, and the roots are immersed in the nutrient solution; the nutrient solution flows by gravity through the first hydroponic pool into the second regulating pool, and the water body is monitored in real time for dissolved oxygen, temperature, and ammonia nitrogen in the second regulating pool, and enters the second hydroponic pool through the second regulating pool; the nutrient solution flows by gravity through the second hydroponic pool into the first regulating pool, thus completing the internal circulation process of the independent small unit; (5) During the internal circulation process, samples will be taken regularly to detect the number of bacteria and pathogens in the water and the dissolved oxygen. When the water indicators do not meet the standards, the circulating water in the hydroponic pool will be passed into the nutrient solution oxygenation and disinfection system, and the water will be oxygenated and disinfected before entering the nutrient solution pool. The nutrient solution after the external circulation will return to the internal circulation system to ensure that the water meets the needs of hydroponic plants; (5) When the nutrient solution of the entire internal circulation system needs to be replaced, the circulating water of the hydroponic pool is transported to the tailwater treatment system for wastewater treatment, and then discharged or reused after meeting the standards; (6) The entire hydroponic process is monitored by a monitoring controller, and the system is precisely controlled through sensors at various fixed points to ensure normal operation of the system.

Images