KR20120064983A - Device and method of disinfecting nutrient solution for plant factory - Google Patents

Abstract

PURPOSE: An apparatus and a method for sterilizing nutrient solutions for a plant factory are provided to increase the generating amount of hypochlorous acid and ozone and to increase dissolved oxygen by arranging air injecting tanks at the front side and the rear side of an electrolyzing unit. CONSTITUTION: An apparatus for sterilizing nutrient solutions for a plant factory includes a first air injecting tank(100), an electrolyzing unit, and a second air injecting tank(300). The air injecting tanks include air supplying parts(110, 310), air diffusing pipes(120, 320), nutrient solution injecting pipes(130, 330), and controlling valves(140, 340). The air supplying parts increase dissolved oxygen by supplying oxygen to nutrient solutions. A first air diffusing pipe diffuses air from a first air supplying pipe. A first nutrient solution injecting pipe discharges nutrient solutions. A first controlling valve is arranged at the first nutrient solution injecting pipe to control the flow of the nutrient solutions. The electrolyzing unit sterilizes the nutrient solutions. A second nutrient solution injecting pipe supplies the nutrient solution from the electrolyzing unit.

Description

Device and Method of disinfecting nutrient solution for plant factory

The present invention relates to a nutrient solution disinfection apparatus and method for a plant factory. In more detail, an electrolysis device is used for disinfection of nutrient solution used in a plant factory, and an oxygen injection tank is provided at the front of the electrolysis device to supply oxygen to the nutrient solution to increase the amount of dissolved oxygen and The amount of chloric acid and ozone can be increased, and an air injection tank is provided at the rear of the electrolysis device to supply oxygen to the nutrient solution that has passed through the electrolysis device to remove ozone and hypochlorous acid dissolved in the nutrient solution, and to remove dissolved oxygen. In addition, the present invention relates to a nutrient solution disinfection apparatus and method for a plant factory, which can prevent contamination of an electrode plate in a short time by performing a backwashing process by supplying weak hydrochloric acid periodically or as needed in the reverse direction. .

A plant factory refers to an agricultural system that enables planned production by artificially controlling the growth environment of plants such as light, temperature, humidity, and nourishment indoors. Plant plants replace sunlight with artificial light such as high-efficiency fluorescent lamps and light-emitting diodes (LEDs), supply carbon dioxide needed for plant growth to carbon dioxide gas generators, and supply temperature using renewable energy such as geothermal heat. Various materials are prepared and fed to the crops to resemble soil components. The plant factory production process is driven by a new system that differs from conventional agricultural production, using automated devices incorporating cutting-edge technology from sowing to harvesting.

In the United States, a large artificial plant plant was studied by a large company in the 1960s and 1970s, but it was not commercialized due to profitability problems. Recently, it has developed into a vertical farming concept that adopts the urban high-rise building method.

In the case of Japan, research on plant factories began in the 1970s, and the Hitachi Plant Central Research Institute developed a fully controlled plant plant in 1974, focusing on establishing growth techniques by studying the optimal planting environment for plants. Since 2009, plant factories have been very active in Japan as the government has selected agricultural producers and commerce companies and engaged in private businesses through various promotions to induce early settlement of projects.

Korea adopted green growth as a national task in 2008 and is striving to develop and support technologies for green growth across all industries to achieve environmental protection and economic growth.

Plant factories are gaining importance as future agricultural technologies that respond to climate change by providing technology to cultivate crops stably throughout the year without restrictions on weather conditions. In addition, the plant factory is a new growth engine industry that can export high value-added source technologies to the Middle East, which has a poor agricultural environment, by introducing a fully automatic operation system in which IT, NT, and BT are integrated. Promising

Farming in a plant factory requires many steps. First, the seeding process is sowing, sprouting, and sprouting, and then through the greening process to strengthen the stem of the sprouted shoot. Subsequently, when the stem is strengthened, the planting process is carried out in a formal process, and the seedlings transferred to the cultivation frame are periodically supplied with nutrient solution and grow over a period of time. The whole process must be mechanized and automated to be a complete plant factory.

Nutrient solution used in the plant factory is rich in nutrients, has the characteristics that microorganisms are easy to propagate and contaminated by bacteria during transport, use, storage and the like. In addition, the nutrient solution has a problem that is likely to cause corruption by anaerobic microorganisms when dissolved oxygen is deficient. At least 5 ppm of oxygen must be dissolved in the culture medium to maintain the minimum growth of horticultural crops, and 5 ppm or more of dissolved oxygen must be present for normal growth. However, when the temperature of the nutrient solution is at room temperature of 20 to 25 degrees Celsius, the amount of dissolved oxygen in the nutrient solution is at most about 8 to 9 ppm, which is inconvenient to adjust the amount of dissolved oxygen by circulation of the artificial culture.

The present invention has been made to solve the above problems, in particular to supply oxygen to the nutrient solution to increase the amount of dissolved oxygen and increase the amount of hypochlorous acid and ozone generated during electrolysis of the nutrient solution, generating hypochlorous acid and ozone It is able to disinfect nutrient solution sufficiently, and after disinfection, it can remove ozone and hypochlorous acid dissolved in nutrient solution and increase the amount of dissolved oxygen, and also can prevent contamination of electrode plate by simple method in a short time. The purpose is to provide a nutrient solution disinfection apparatus and method.

Nutrient disinfection device for a plant factory according to the present invention devised to achieve the above object is to supply oxygen to the nutrient solution used in the plant factory to increase the amount of dissolved oxygen and to increase the amount of hypochlorous acid and ozone during electrolysis of nutrient solution A first air supply unit, a first air diffuser for diffusing air supplied from the first air supply unit, a first nutrient solution injection tube for discharging nutrient solution to the outside, and a first nutrient solution injection tube A first air injection tank including a first control valve for controlling flow; An electrolysis device which receives the nutrient solution from the nutrient solution infusion tube and generates hypochlorous acid and ozone through electrolysis of the nutrient solution to disinfect the nutrient solution; And a second air supply unit for supplying oxygen to the nutrient solution that has passed through the electrolysis device to remove the hypochlorous acid and ozone dissolved in the nutrient solution and increasing the amount of dissolved oxygen, and diffusing the air supplied from the second air supply unit. A second air injection engine including a second air diffuser for supplying a nutrient solution from the electrolysis device, and a second control valve provided in the second nutrient solution injection tube to control the flow of the nutrient solution Characterized in that it comprises a tank.

The first nutrient solution injection tube may be provided at a lower end of the first air injection tank, and the second nutrient solution injection tube may be provided at an upper end of the second air injection tank.

In addition, the electrolysis device is in communication with the first nutrient solution inlet pipe inflow of the nutrient solution discharged from the first air injection tank, a plurality of holes are formed at regular intervals, the opposite end is a nutrient solution inlet tube closed by a stopper ; A plurality of electrode plates spaced apart from each other in parallel at a predetermined interval on an upper portion of the nutrient solution inlet pipe and disposed one by one between each hole and the hole; And an upper end of the electrode plate, communicating with the second nutrient solution injection tube, discharging the nutrient solution passed through the electrode plate to the second air injection tank, and forming a plurality of holes at regular intervals, and the opposite end is closed. It may include a nutrient solution discharge pipe closed.

In addition, it is preferable that a DC power source of opposite polarity is applied to electrode plates located at both ends of the electrode plate.

The nutrient solution disinfection method for a plant factory according to the present invention comprises the steps of: (a) generating oxygen in a closed space and then supplying oxygen to the nutrient solution used in the plant factory; (b) disinfecting the nutrient solution by generating hypochlorous acid and ozone by passing the nutrient solution having an increased dissolved oxygen amount through the plurality of electrode plates to which the DC power is applied through step (a); (c) supplying oxygen to the sterilized nutrient solution through step (b) to remove hypochlorous acid and ozone dissolved in the nutrient solution and to increase the amount of dissolved oxygen in the nutrient solution; And (d) supplying weak hydrochloric acid to the plurality of electrode plates to prevent contamination of the electrode plates through a backwashing process.

According to the present invention, an electrolysis device is used for disinfection of nutrient solution used in a plant factory, and by providing an air injection tank in front of the electrolysis device, oxygen is supplied to the nutrient solution to increase the amount of dissolved oxygen and The amount of chloric acid and ozone can be increased, and an air injection tank is provided at the rear of the electrolysis device to supply oxygen to the nutrient solution that has passed through the electrolysis device to remove ozone and hypochlorous acid dissolved in the nutrient solution, and to remove dissolved oxygen. There is an effect that can be increased.

In addition, according to the present invention it is possible to prevent the contamination of the electrode plate by a simple method in a short time by performing a backwashing process by supplying weak hydrochloric acid periodically or in the reverse direction if necessary.

1 is a block diagram of a nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention,
Figure 2 is a perspective view of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention,
3 is a cross-sectional view of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention,
Figure 4 is a flow chart of the nutrient solution disinfection method for a plant factory according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

1 is a block diagram of a nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention. Figure 2 is a perspective view of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention. 3 is a cross-sectional view of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention.

Nutrient disinfection device for a plant factory according to a preferred embodiment of the present invention, referring to Figures 1 to 3, the first air injection tank 100, the electrolysis device 200 and the second air injection tank 300 It is made to include.

Nutrient solutions used in plant factories are rich in nutrients and are susceptible to microbial and other bacterial contamination during use. In addition, the nutrient solution may cause corruption due to anaerobic microorganisms when dissolved oxygen is deficient. Therefore, sufficient amount of oxygen should be supplied to the nutrient solution for the plant factory and the dissolved oxygen amount should be higher than the standard value, and it should be used after removing microorganisms and bacteria through disinfection.

The first air injection tank 100 is to maximize the disinfection effect by increasing the oxygen concentration of the nutrient solution for the plant factory to increase the amount of hypochlorous acid and ozone in the electrolysis device 200. To this end, the first air injection tank 100 includes a housing 105, a first air supply unit 110, a first air diffuser 120, a first nutrient solution injection tube 130, and a first control valve 140. Include.

The housing 105 seals the inside of the first air injection tank 100 so that the air generated in the first air supply unit 110 and diffused through the first air diffuser 120 does not flow out to the nutrient solution. So that the amount of dissolved oxygen in the nutrient solution can be increased efficiently.

The first air supply unit 110 supplies air to the housing 105 to supply oxygen to the nutrient solution for the plant factory to increase the amount of dissolved oxygen and increase the amount of hypochlorous acid and ozone during electrolysis of the nutrient solution. To this end, the first air supply unit 110 is provided in the housing 105, and receives power from the outside or operates by a battery built therein to generate air.

The first air diffuser 120 is provided to diffuse the air supplied from the first air supply unit 110 into the housing 105. To this end, the first air diffuser 120 is connected to the first air supply unit 110 by a pipe or the like. The first air diffuser 120 may be provided in a form in which a plurality of unit units having numerous through holes are connected to each other by a pipe or the like.

The unit units constituting the first air diffuser 120 may be formed in various shapes such as a spherical shape, a hexahedron shape, and each unit unit is provided with a large number of through holes, so that the unit air is supplied from the first air supply unit 110. Allow air to quickly diffuse into the housing 105. Although not shown, the first air diffuser 120 may be formed in the form of a pipe in which one end is closed, and the other end of the pipe is connected to the first air supply unit 110 and in one end of the pipe that is closed with the outer circumferential surface of the pipe. Multiple apertures may be formed.

The first nutrient solution injection tube 130 discharges the nutrient solution in which the dissolved oxygen amount is increased to the outside of the housing 105. Specifically, one end of the first nutrient solution inlet tube 130 is connected to the housing 105, the other end is connected to the nutrient solution inlet tube 202 of the electrolysis device 200.

The first nutrient solution injection tube 130 is provided at the lower end of the first air injection tank 100, that is, at the lower end of the housing 105. This is because the nutrient solution inlet pipe 202 of the electrolysis device 200 is provided at the lower end of the electrolysis device 200. In the electrolysis apparatus 200, the nutrient solution is supplied from the nutrient solution inlet pipe 202 at the lower side and pushed up between the electrode plates 210 to be electrolyzed, and then the second air injection tank (2) is provided through the nutrient solution discharge pipe 232 at the top. The process of sending to 300 is repeated.

The first control valve 140 is provided in the first nutrient solution injection tube 130 to control the flow of nutrient solution. The first control valve 140 closes the first nutrient solution injection tube 130 until the nutrient solution is supplied with a sufficient amount of oxygen from the first air injection tank 100, and when the dissolved oxygen amount is equal to or greater than the reference value, Open the nutrient solution injection tube 130 to allow the nutrient solution to flow into the electrolysis device (200). To this end, the first control valve 140 is provided with a sensor for measuring the dissolved oxygen amount of the liquid, it is possible to continuously check the dissolved oxygen amount of the nutrient solution so that the first control valve 140 is automatically operated.

In the case of leafy vegetables, the hydroponic cultivation facility area was 98 ha in 2002, accounting for 17.3% of the total nutrient cultivation facility area of 565 ha. According to the cultivation method, they consisted of 36.7% of immersion, 39.5% of spray, and 6.1% of thin film. Stable cultivation is possible due to the small change of temperature, nutrient solution and pH when cultivating hydroponic hydroponic plants, but limited oxygen production in stable concentration of dissolved oxygen because oxygen necessary for root respiration of crops depends mainly on dissolved oxygen dissolved in It acts as a factor.

The test results show that the range of crop adaptation to dissolved oxygen concentration is seasonally wide at low temperatures and narrow at high temperatures. By crops, spinach and red beets were sensitive to dissolved oxygen concentrations, and chicory and bok choy were relatively insensitive. Therefore, seasonally less dissolved oxygen control is needed from November to March, but it is necessary to artificially adjust dissolved oxygen concentration from April to October. By crops, spinach and red beetroots need more than 5ppm in November-March and 10-20ppm in April-October, while lettuce, garland chrysanthemum, and endives are managed at 5-20ppm in June-September. Relatively less needed to control dissolved oxygen concentration. The above test results are summarized in Table 1.

crops Dissolved oxygen
responsiveness Seasonal optimum dissolved oxygen concentration range (ppm) Spring
(April to May) summer season
(June to September) Fall
(October) winter season
(November-March) Spinach The 10-20 10-20 10-20 5 to 10 Lettuce, endive, garland chrysanthemum medium 5 to 10 5-20 5 to 10 5 to 10 Bok Kyung Chae, Soy Sauce Curry that 5 to 10 5 to 10 5 to 10 5 to 10

The electrolysis device 200 generates hypochlorous acid and ozone through electrolysis of nutrient solution to disinfect microorganisms and bacteria in nutrient solution.

Ozone (O ₃ ) as a disinfectant has the advantages of strong oxidizing power, less influence by pH, less generation of by-products by disinfection without generating odor. On the other hand, ozone has a short half-life and a condition that is somewhat unstable. If 10g of ozone is used per minute in the nutrient solution, most molds, bacteria, viruses, etc. can be sterilized. When oxygen is supplied to the nutrient solution, the nutrient solution becomes the active condition, and ozone is generated during the electrolysis of the nutrient solution that becomes the active condition.

Hypochlorite as a disinfectant is a disinfectant that is most used as residual disinfection, and has the advantage that it is very safe and effective as liquid chlorine because there is no leakage of harmful gas during storage or manipulation.

The electrolysis device 200 includes a nutrient solution inlet tube 202, an electrode plate 210, and a nutrient solution discharge tube 232.

The nutrient solution inlet tube 202 communicates with the first nutrient solution inlet tube 130 to introduce the nutrient solution discharged from the first air injection tank 100 into the electrolysis device 200. The nutrient solution inlet pipe 202 is provided with a hole 204 for discharging the introduced nutrient solution between the electrode plate 210.

A plurality of holes 204 are provided at regular intervals, and the nutrient solution is injected from the nutrient solution inlet pipe 202 toward the electrode plate 210. The spacing between the holes 204 is preferably the same as the spacing between the electrode plates 210. This is because the nutrient solution injected from the hole 204 penetrates between the respective electrode plates 210 and rises upward, so that the holes 204 and the electrode plates 210 are alternately arranged.

The opposite end of the nutrient solution inlet pipe 202 (the opposite end of the end connected to the first nutrient solution injection pipe 130) is closed by a stopper 206 or the like. Since the electrode plate may be contaminated after performing electrolysis for a certain period of time, the flow direction of the nutrient solution to the electrode plate (the lower left to the upper right direction in FIG. 3) and the opposite direction (the upper left to lower left direction in FIG. 3). The backwashing process for supplying weak hydrochloric acid is performed. In this case, the stopper 206 is opened to open the opposite end of the nutrient solution inlet pipe 202, and then the weak hydrochloric acid is supplied. Although not shown, the stopper 206 may be replaced by a control valve or the like.

The electrode plate 210 is disposed on the upper portion of the nutrient solution inlet pipe 202 so as to be spaced apart from each other in parallel at a predetermined interval. Titanium (Ti) may be used as the material of the electrode plate 210. In addition, a bipolar type (Bi-Polar Type) in which a DC power source of opposite polarity is applied to only the electrode plates 212 and 214 located at both ends of the electrode plate is not applied to all electrode plates.

The mono-polar type is a method in which a plurality of electrode plates are arranged at regular intervals, and a DC power source of opposite polarity is alternately applied to each electrode plate. In the case of the monopolar type, the current must flow through a plurality of electrode plates, so the amount of charged current is proportional to the number of electrode plates, which increases the cost due to the thickness of the wire, the capacity of the rectifier, and the size of the electrode. have. In addition, in the case of the monopolar method, since surface contamination occurs frequently on the surface of the electrode plate during electrolysis, there is a disadvantage in that the efficiency of the electrode decreases and the productivity of the electrolytic water is lowered.

On the other hand, the bipolar method has the advantages of high current density, long electrode life, high efficiency and small volume. The monopolar type shows high current and low voltage, whereas the bipolar type shows low current and high voltage. In addition, the bipolar method has the advantages of low electrode contamination and reducing the price of peripheral materials such as wire thickness, rectifier capacity, and electrode size.

The nutrient solution discharge pipe 232 is provided at the upper end of the electrode plate 210 and communicates with the second nutrient solution injection pipe 330 to discharge the nutrient solution passed through the electrode plate 210 to the second air injection tank 300. The nutrient solution discharge pipe 232 is provided with a hole 234 for introducing the nutrient solution raised between the electrode plate 210.

A plurality of holes 234 are provided at regular intervals, and eject the nutrient solution from the electrode plate 210 toward the nutrient solution discharge tube 232. The spacing between the holes 234 is preferably the same as the spacing between the electrode plates 210. This is because the nutrient solution injected from the electrode plate 210 moves to the nutrient solution discharge pipe 232 through each hole 234, so that the holes 234 and the electrode plate 210 are alternately disposed.

The opposite end of the nutrient solution discharge pipe 232 (the opposite end of the end connected to the second nutrient solution injection pipe 330) is closed by a stopper 236 or the like. Since the electrode plate may be contaminated after performing electrolysis for a certain period of time, the flow direction of the nutrient solution to the electrode plate (the lower left to the upper right direction in FIG. 3) and the opposite direction (the upper left to lower left direction in FIG. 3). The backwashing process of supplying weak hydrochloric acid is performed. In this case, the stopper 236 is opened to open the opposite end of the nutrient solution discharge pipe 232, and then the weak hydrochloric acid is supplied. Although not shown, the stopper 236 may be replaced with a control valve or the like as mentioned above.

The second air injection tank 300 removes residual waste gas dissolved in the nutrient solution that has been disinfected by electrolysis to inhibit plant growth, removes dissolved ozone and hypochlorous acid, and increases the amount of dissolved oxygen to increase the amount of nutrient solution. To prevent decay and promote plant growth. To this end, the second air injection tank 300 includes a housing 305, a second air supply unit 310, a second air diffuser 320, a second nutrient solution injection pipe 330, and a second control valve 340. Include.

The housing 305 seals the inside of the second air injection tank 300, so that air generated in the second air supply unit 310 and diffused through the second air diffuser 320 does not leak out to the nutrient solution. So that the amount of dissolved oxygen in the nutrient solution can be increased efficiently.

The second air supply unit 310 supplies oxygen to the nutrient solution that has passed through the electrolysis device 200 to remove ozone and hypochlorous acid dissolved in the nutrient solution and to supply air in the housing 305 to increase the amount of dissolved oxygen. . To this end, the second air supply unit 310 is provided inside the housing 305 and generates air by receiving power from the outside or operating by a battery built in itself.

The second air diffuser 320 is provided to diffuse the air supplied from the second air supply unit 310 into the housing 305. To this end, the second air diffuser 320 is connected to the second air supply unit 310 by a pipe or the like. The second air diffuser 320 may be provided in a form in which a plurality of unit units having numerous through holes are connected to each other by a pipe or the like.

The unit units constituting the second air diffuser 320 may be formed in various shapes such as a spherical shape, a hexahedron shape, and each unit unit is provided with a large number of through-holes and is supplied from the second air supply unit 310. Allow air to quickly diffuse into the housing 305. Although not shown, the second air diffuser 320 may be formed in the form of a pipe in which one end is closed, and the other end of the pipe is connected to the second air supply unit 310 and in one end of the pipe that is closed with the outer circumferential surface of the pipe. Multiple apertures may be formed.

The second nutrient solution injection tube 330 introduces the sterilized nutrient solution into the housing 305. Specifically, one end of the second nutrient solution injection pipe 330 is connected to the nutrient solution discharge pipe 232 of the electrolysis device 200, the other end is connected to the housing 305.

The second nutrient solution injection pipe 330 is provided at the upper end of the second air injection tank 300, that is, at the upper end of the housing 305. This is because the nutrient solution discharge pipe 232 of the electrolysis device 200 is provided on the top of the electrolysis device 200. In the electrolysis apparatus 200, the nutrient solution is supplied from the nutrient solution inlet pipe 202 at the lower side and pushed up between the electrode plates 210 to be electrolyzed, and then the second air injection tank (2) is provided through the nutrient solution discharge pipe 232 at the top. The process of sending to 300 is repeated.

The second control valve 340 is provided in the second nutrient solution injection pipe 330 to control the flow of nutrient solution. The second control valve 340 closes the second nutrient solution injection pipe 330 until the nutrient solution is sufficiently disinfected in the electrolysis device 200, and the second nutrient solution when the amount of ozone and hypochlorous acid is higher than the reference value. The injection pipe 330 is opened to allow the nutrient solution to flow into the second air injection tank 300. To this end, the second control valve 340 is provided with a sensor that can measure the amount of dissolved ozone and hypochlorous acid, the second control valve 340 automatically checks the amount of dissolved ozone and hypochlorous acid of the nutrient solution continuously. You can also make it work.

Figure 4 is a flow chart of the nutrient solution disinfection method for a plant factory according to a preferred embodiment of the present invention.

Nutrient disinfection method for a plant factory according to a preferred embodiment of the present invention, referring to Figure 4, air generation step (S10), air diffusion step (S20), oxygen supply step (S30), electrolysis and disinfection step (S40) ), Oxygen supply step (S50), and backwashing step (S60).

Air generation step (S10) is a step of generating air or oxygen using an air generator or an oxygen generator. For example, the air generation step (S10) may be performed through the first air supply unit 110 of the nutrient solution disinfection device for a plant factory in accordance with a preferred embodiment of the present invention, by supplying oxygen to the nutrient solution for the plant factory dissolved oxygen amount To increase the amount of hypochlorous acid and ozone during electrolysis of nutrient solution.

Air diffusion step (S20) is a step of diffusing the air generated through the air generation step (S10) in a closed space. For example, the air diffusion step (S20) may be performed through the first air diffuser 120 of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention, and quickly spread the supplied air into the closed space This is to allow sufficient oxygen to be dissolved in the nutrient solution.

Oxygen supply step (S30) is a step of dissolving the air saturated in the sealed space through the air generation step (S10) and the air diffusion step (S20) into the nutrient solution. Sufficient oxygen supply in the nutrient solution increases the amount of dissolved oxygen, and during the electrolysis of the nutrient solution, the amount of hypochlorous acid and ozone is increased.

Electrolysis and disinfection step (S40) is a step of disinfecting the nutrient solution by electrolyzing the nutrient solution supplied with sufficient oxygen to generate hypochlorous acid and ozone. For example, the electrolysis and disinfection step (S40) may be performed through the electrolysis device 200 of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention, the nutrient solution in which the amount of dissolved oxygen is increased By electrolysis through a plurality of electrode plates to generate hypochlorous acid and ozone to disinfect the nutrient solution.

Oxygen supply step (S50) is a step of removing oxygen and hypochlorous acid dissolved in the nutrient solution by supplying oxygen through the sterilization process through the electrolysis and disinfection step (S40) to increase the amount of dissolved oxygen. For example, the oxygen supply step (S50) may be performed through the second air injection tank 300 of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention.

Backwashing step (S60) is a step of preventing contamination of the electrode plate by supplying weak hydrochloric acid in the reverse direction to the electrolysis device. For example, the backwashing step (S60) may be performed through the electrolysis device 200 of the nutrient solution disinfection device for a plant factory according to a preferred embodiment of the present invention, the weak hydrochloric acid in the opposite direction to the nutrient solution flow during electrolysis The feed box is as mentioned above.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

The present invention can be widely applied to the field of design and manufacture of a nutrient solution disinfection device for a plant factory by disinfecting nutrient solution used in a plant factory and supplying sufficient oxygen.

100-1st air injection tank 110-1st air supply part
120-first air diffuser 130-first nutrient solution inlet tube
140-First control valve 200-Electrolysis device
202-nutrient solution inlet tube 210-electrode plate
232-Nutrient Discharge Pipe 300-Second Air Injection Tank
310-second air supply unit 320-second air diffuser
330-2nd nutrient solution inlet tube 340-2nd control valve

Claims (5)

A first air supply unit for supplying oxygen to the nutrient solution used in the plant factory to increase the amount of dissolved oxygen and to increase the amount of hypochlorous acid and ozone during electrolysis of the nutrient solution, and a second air diffusion unit for diffusing the air supplied from the first air supply unit A first air injection tank including an air diffuser, a first nutrient solution inlet tube for discharging nutrient solution to the outside, and a first control valve provided in the first nutrient solution inlet tube to control the flow of nutrient solution;
An electrolysis device which receives the nutrient solution from the nutrient solution infusion tube and generates hypochlorous acid and ozone through electrolysis of the nutrient solution to disinfect the nutrient solution; And
A second air supply unit for supplying oxygen to the nutrient solution that has passed through the electrolysis device to remove hypochlorous acid and ozone dissolved in the nutrient solution and increasing the amount of dissolved oxygen, and for diffusing air supplied from the second air supply unit A second air injection tank including a second air diffuser, a second nutrient solution inlet tube supplied with nutrient solution from the electrolysis device, and a second control valve provided at the second nutrient solution inlet tube to control the flow of nutrient solution
Nutrient disinfection device for a plant factory comprising a. The method of claim 1,
The first nutrient solution injection tube is provided at the lower end of the first air injection tank, the second nutrient solution injection tube is a nutrient solution disinfection device for a plant factory, characterized in that provided on the top of the second air injection tank. The method of claim 2, wherein the electrolysis device
A nutrient solution inlet tube communicating with the first nutrient solution inlet tube to introduce nutrient solution discharged from the first air injection tank, and having a plurality of holes formed at predetermined intervals, and opposite ends of which are closed with a stopper;
A plurality of electrode plates spaced apart from each other in parallel at a predetermined interval on an upper portion of the nutrient solution inlet pipe and disposed one by one between each hole and the hole; And
It is provided on the upper end of the electrode plate, and communicates with the second nutrient solution injecting tube to discharge the nutrient solution passed through the electrode plate to the second air injection tank, a plurality of holes are formed at regular intervals, the opposite end is a stopper Closed nutrient solution discharge line
Nutrient disinfection device for a plant factory comprising a. The method of claim 3,
The nutrient solution disinfection device for a plant factory, characterized in that the DC power of the opposite polarity is applied to the electrode plates located at both ends of the electrode plate. (a) supplying oxygen to the nutrient solution used in the plant factory by generating and diffusing air in a closed space;
(b) disinfecting the nutrient solution by generating hypochlorous acid and ozone by passing the nutrient solution having an increased dissolved oxygen amount through the plurality of electrode plates to which the DC power is applied through step (a);
(c) supplying oxygen to the sterilized nutrient solution through step (b) to remove hypochlorous acid and ozone dissolved in the nutrient solution and to increase the amount of dissolved oxygen in the nutrient solution; And
(d) supplying weak hydrochloric acid to the plurality of electrode plates to prevent contamination of the electrode plates through a backwashing process;
Nutrient disinfection method for a plant factory comprising a.

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