KR101339204B1 - Method for circulating water culture with circulating water culture system - Google Patents

Abstract

The present invention relates to a circulating hydroponic cultivation method using a circulating hydroponic cultivation system, and more particularly, to a circulating hydroponic cultivation system and a circulating hydroponic cultivation method for recycling waste nutrient solution. According to the present invention, by recovering the waste nutrient solution absorbed by the crop and reused, it is possible to prevent the discharge of the waste nutrient solution to prevent water resources and soil pollution, and to reduce the production cost of the crop by reducing the use of water and fertilizer, etc. Can be.

Description

Circulating hydroponic cultivation method using circulating hydroponic cultivation system {Method for circulating water culture with circulating water culture system}

The present invention relates to a circulating hydroponic cultivation method using a circulating hydroponic cultivation system, and more particularly, to a circulating hydroponic cultivation system and a circulating hydroponic cultivation method for recycling waste nutrient solution.

In general, hydroponic cultivation method using nutrient solution is a method of cultivating crop using nutrient solution dissolving essential elements required for growth of crop in proper concentration according to its absorption rate. It is a scientific farming technique that grows crops by artificially and precisely controlling nutrient and medium conditions.

This hydroponic cultivation method is used for the cultivation of large crops such as flower crops or fruit trees as well as small crops such as vegetables.

The nutrient solution used for hydroponic cultivation is manufactured to maintain a constant EC (electrical conductivity) of nutrients and nutrients to help the standard growth of each crop, and is supplied to the cultivation bed where the crop is grown.

On the other hand, hydroponic cultivation methods have recently been shifted from acyclic to cyclic in agricultural advanced countries. This is because the nutrient solution discharged from the facility acts as a pollution source of water and soil, so developed countries regulate the discharge of nutrient solution, and even if it is cultivated in a circular manner, the cultivation efficiency of crops is not greatly reduced.

Here, circulating hydroponic cultivation is a method in which crops are absorbed and the remaining nutrients circulate between the nutrient tank and the cultivation bed, and the nutrient solution is discharged compared to the non-circulating hydroponic cultivation, which mostly disposes of 15-40% of the excess nutrient solution out of the facility. It has the advantage of preventing water and soil pollution, and saving water and fertilizer.

In Korea, the hydroponic cultivation area has increased rapidly in recent decades, but there is no restriction on nutrient discharge in hydroponic cultivation method, and the economic burden is increased by the initial investment cost to build a circulating hydroponic cultivation system. However, due to the non-development of circulating hydroponic cultivation technology, such as undeveloped circulating hydroponic cultivation nutrient solution for each crop and nutrient solution processing and management technology for nutrient nutrient reuse, most of the cultivated vegetables are grown acyclic.

Therefore, in Korea, there is a growing need to convert the existing acyclic hydroponic cultivation into a circulating hydroponic cultivation method, and for this purpose, the development of a system capable of treating waste nutrient solution is required.

Republic of Korea Patent Publication No. 10-2010-0112397 (2010.10.19)

The present inventors have solved the above problems and provide a circulating hydroponic cultivation system and a circulating hydroponic cultivation method capable of reusing waste nutrient solution excellent in functionality and practicality. It was found that the method could satisfy this requirement and came to complete the present invention.

Therefore, an object of the present invention is a waste nutrient collection unit for collecting waste nutrient solution from the cultivation bed; A waste nutrient storage unit for sterilizing and storing the waste nutrient solution supplied from the waste nutrient solution collecting unit; A nutrient storage unit storing nutrient solution and acid; A raw water supply unit supplying raw water to the nutrient solution storage unit; A mixing unit receiving the mixed nutrient solution, the nutrient solution, and the acid from the waste nutrient solution storage unit and the nutrient solution storage unit, and then supplying the mixed nutrient solution to the cultivation bed; And to provide a circulating hydroponic cultivation system comprising a control unit for controlling the operation of the waste nutrient solution collecting unit, waste nutrient solution storage unit, nutrient solution storage unit, raw water supply unit, and mixing unit.

Here, the waste nutrient collection unit may include a collecting tank for storing the collected waste nutrient solution and a filtration device for filtering the waste nutrient solution supplied from the collection tank to the waste nutrient solution storage unit.

In addition, the waste nutrient collection unit may include a water level control sensor.

The waste nutrient storage may include a waste nutrient temperature controller.

The waste nutrient storage unit may include a storage tank and a sterilization device, and the control unit may sterilize the waste nutrient solution stored in the storage tank by circulating the sterilization device at a predetermined time.

The raw water supply unit may further supply raw water to at least one of the waste nutrient storage unit and the mixing unit.

In addition, the raw water supply may include a raw water temperature controller.

The mixing unit may include a measurement sensor measuring pH and EC values of the waste nutrient solution supplied from the waste nutrient solution storage unit, and the control unit may be configured from the nutrient solution storage unit based on the value measured by the measurement sensor. It is possible to control the amount of nutrient solution and acid supplied to the mixing unit.

In addition, the circulating hydroponic cultivation system may further include an oxygen supply for supplying oxygen to the nutrient solution supplied from the mixing unit to the cultivation bed.

In addition, an object of the present invention, in a further aspect, the waste nutrient solution collecting step of collecting the waste nutrient solution from the cultivation bed and stored in the waste nutrient solution collecting unit; A waste nutrient storage step of sterilizing the waste nutrient solution supplied from the waste nutrient solution collecting unit and storing the waste nutrient solution in the waste nutrient solution storage unit; A mixing step of preparing a nutrient solution by mixing the nutrient solution and the nutrient solution and the acid supplied from the waste nutrient solution storage unit and storing the mixed solution; And a nutrient solution supplying step of supplying the nutrient solution stored in the mixing unit to the cultivation bed.

Here, when the waste nutrient solution collecting step, when the waste nutrient solution stored in the waste nutrient solution collection unit exceeds a predetermined level, the waste nutrient solution may be supplied to the waste nutrient solution storage unit.

And, the waste nutrient solution storage step, it is preferable to receive the filtered waste nutrient solution from the waste nutrient solution collecting unit.

In addition, the waste nutrient solution storage step, it is preferable to maintain the stored waste nutrient solution at a predetermined temperature.

In the storing of the nutrient solution, the stored nutrient solution may be circulated and sterilized every predetermined time.

In addition, the mixing step, it is preferable to mix the nutrient solution and acid having a predetermined temperature with the waste nutrient solution.

In the mixing step, it is preferable that the nutrient solution prepared by mixing the waste nutrient solution with the nutrient solution and the acid has a predetermined pH value and EC value.

In addition, the nutrient solution supply step, it is preferable to supply oxygen to the nutrient solution so that the nutrient solution supplied to the cultivation bed has a predetermined dissolved oxygen amount.

According to the present invention, by recovering the waste nutrient solution absorbed by the crop and reused, it is possible to prevent the discharge of the waste nutrient solution to prevent water resources and soil pollution, and to reduce the production cost of the crop by reducing the use of water and fertilizer, etc. Can be.

1 is a schematic configuration diagram of a circulating hydroponic cultivation system according to an embodiment of the present invention.
Figure 2 is a schematic perspective view of a cultivation bed according to an embodiment of the present invention.
3 is a schematic flowchart of a hydroponic cultivation method according to an embodiment of the present invention.

The present invention, in one aspect, the waste nutrient solution collecting portion for collecting the waste nutrient solution from the cultivation bed; A waste nutrient storage unit for sterilizing and storing the waste nutrient solution supplied from the waste nutrient solution collecting unit; A nutrient storage unit storing nutrient solution and acid; A raw water supply unit supplying raw water to the nutrient solution storage unit; A mixing unit receiving the mixed nutrient solution, the nutrient solution, and the acid from the waste nutrient solution storage unit and the nutrient solution storage unit, and then supplying the mixed nutrient solution to the cultivation bed; And it provides a circulating hydroponic cultivation system comprising a control unit for controlling the operation of the waste nutrient solution collecting unit, waste nutrient solution storage unit, nutrient solution storage unit, raw water supply unit, and mixing unit.

In still another aspect, the present invention provides a waste nutrient collecting step of collecting waste nutrient solution from a cultivation bed and storing the waste nutrient solution in a waste nutrient solution collecting unit; A waste nutrient storage step of sterilizing the waste nutrient solution supplied from the waste nutrient solution collecting unit and storing the waste nutrient solution in the waste nutrient solution storage unit; A mixing step of preparing a nutrient solution by mixing the nutrient solution and the nutrient solution and the acid supplied from the waste nutrient solution storage unit and storing the mixed solution; And it provides a circulating hydroponic cultivation method comprising the nutrient solution supply step of supplying the nutrient solution stored in the mixing unit to the cultivation bed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

1 is a schematic configuration diagram of a circulating hydroponic cultivation system according to an embodiment of the present invention.

As shown in Figure 1, the circulating hydroponic cultivation system according to an embodiment of the present invention waste nutrient solution collecting unit 100, waste nutrient solution storage unit 200, nutrient solution storage unit 300, raw water supply unit 400 , The mixing unit 500, and the control unit 600 may be included.

The waste nutrient solution collecting part 100 collects the waste nutrient solution from the cultivation bed 10. Specifically, the waste nutrient solution collecting unit 100 collects the waste nutrient solution which is absorbed by the crops from the nutrient solution supplied to the cultivation bed 10. Here, the waste nutrient solution means a nutrient solution that is discharged from the cultivation bed 10, that is, used at least once, without being absorbed by the crop in the nutrient solution supplied to the cultivation bed 10.

As such, the waste nutrient solution collecting unit 100 filters the waste nutrient solution supplied to the waste nutrient solution storage unit 200 from the collecting tank 110 and the collecting tank 110 in which the collected waste nutrient solution is stored. It may be made, including.

That is, the collection tank 110 and the waste nutrient solution storage unit 200 are connected to the waste nutrient solution transport pipe, and the filtration device 120 is connected to the waste nutrient solution storage unit 200 from the collection tank 110 by the transfer pump 130. The impurities contained in the waste nutrient solution transferred to the filtration are removed by filtration.

In addition, the waste nutrient solution collecting unit 100 may be installed with a water level control sensor (not shown) for detecting the level of the collected waste nutrient solution, the control unit 600 is a water level measured by the water level control sensor (not shown) When the predetermined level or more can be supplied to the waste nutrient solution storage unit 200, the waste nutrient solution collected in the waste nutrient solution collecting unit 100.

On the other hand, crops grow in the cultivation bed 10 as shown in FIG. The cultivation bed 10 will have a nutrient solution storage space provided therein so that the nutrient solution supplied from the nutrient solution supply pipe can be stored therein, and an upper portion thereof is opened.

The cultivation bed 10 is supplied with the nutrient solution through the nutrient solution supply pipe connected to the mixing unit 500, the waste nutrient solution is not absorbed by the crop is discharged to the waste nutrient solution collecting unit 100 through the waste nutrient solution recovery tube.

An artificial light source (not shown) for irradiating light to the crop may be disposed on the cultivation bed 10. The artificial light source (not shown) may include a cold cathode fluorescent lamp or a light emitting diode.

The cultivation bed 10 may be located in a closed space separated from the outside in order to artificially control environmental conditions necessary for plant culture, such as light, temperature, humidity, and air (carbon dioxide concentration).

On the other hand, the nutrient solution supply pipe may be provided with a pressure gauge 12 and the solenoid valve 14, wherein the pressure gauge 12 measures the flow rate of the nutrient solution supplied to the cultivation bed through the nutrient solution supply pipe, the solenoid valve 14 is based on this This will block or regulate the flow of nutrient solution.

The waste nutrient solution storage unit 200 sterilizes and stores the waste nutrient solution supplied from the waste nutrient solution collecting unit 100. In the treatment of waste nutrient solution, when the pathogen is generated in the nutrient solution due to hydroponic cultivation characteristics, there are more contact opportunities with the roots than the cultivation of the soil, so the spread of the pathogen is quick and easy to spread throughout the cultivation bed. Therefore, the present invention can prevent the occurrence of such a problem by sterilizing pathogens contained in the waste nutrient solution in the waste nutrient solution storage unit 200.

Sterilization can be achieved by irradiating the nutrient solution with ultraviolet light. In the case of ultraviolet sterilization, the treatment is simple, economical, and does not leave a by-product such as a separate harmful substance, and thus has an advantage of not adversely affecting the environment, which is preferable to apply to the present invention.

As such, the waste nutrient solution storage unit 200 may include a storage tank 210 and a sterilization apparatus 220. In this case, the controller 600 sterilizes the waste nutrient solution stored in the storage tank 210 at a predetermined time. The device 220 is circulated to sterilize the nutrient solution.

Specifically, the waste nutrient solution stored in the storage tank 210 is transferred to the sterilization apparatus 220 at regular intervals through the circulation pump 230, and then the sterilized waste nutrient solution is repeatedly injected into the storage tank 210. By doing so, it is possible to sterilize pathogens contained in the nutrient solution.

On the other hand, the waste nutrient solution storage unit 220 may include a waste nutrient solution temperature controller 240 for controlling the temperature of the waste nutrient solution.

In hydroponic cultivation, since the temperature of the nutrient solution is an important factor affecting the growth of the crop, the nutrient solution storage unit to adjust the temperature of the nutrient solution stored in the nutrient solution storage unit 200 to an optimal temperature suitable for the growth conditions of the crop 200 may include a nutrient solution temperature controller 240.

The waste nutrient solution stored in the waste nutrient solution storage unit 200 may be supplied to the mixing unit 500 through the feed pump 250.

The nutrient solution storage unit 300 stores the nutrient solution and the acid. Since the amount of waste nutrient solution recovered from the cultivation bed 10 is insufficient to supply the cultivation bed 10, and its acidity (pH) is not suitable for the growth conditions of the crop, the nutrient solution storage unit 300 is mixed with the waste nutrient solution. To store the nutrient solution and acid to be supplied to the cultivation bed (10).

The nutrient solution storage unit 300 may include a plurality of storage tanks. That is, since crops require various kinds of nutrients, the nutrient solution storage unit 300 may be formed of storage tanks for storing respective storage tanks and acids according to nutrient types.

The raw water supply unit 400 supplies raw water to the nutrient solution storage unit 300. The raw water supply unit 400 may include a raw water tank 410 and a filter 420. That is, the raw water supply unit 400 passes the raw water supplied through the raw water supply pump 430 through the filter 420, stores the raw water in the raw water tank 410, and supplies the raw water to the nutrient storage unit 300. The raw water supply from the raw water tank 410 to the nutrient solution storage unit 300 may be performed through the raw water pump 450.

Raw water is supplied to the nutrient solution storage unit 300, and the nutrient solution is manufactured by mixing the feed solution with the feed solution at a predetermined ratio.

The raw water supply unit 400 may include a raw water temperature controller 440 for controlling the temperature of raw water.

As described above, the raw water is supplied to the nutrient solution storage unit 300, and the nutrient solution is prepared by mixing the nutrient solution in the nutrient solution storage unit 300 at a predetermined ratio, and thus the nutrient solution stored in the nutrient solution storage unit 300 through temperature control of the raw water. The temperature can be adjusted. Thus, the temperature of the raw water through the raw water temperature controller 440 will be adjusted to suit the optimum growth conditions of the crop.

Meanwhile, the raw water supply unit 400 may further supply raw water to at least one of the nutrient storage unit 200 and the mixing unit 500 in addition to the nutrient storage unit 300.

That is, the raw water supply unit 400 supplies the raw water to the waste nutrient solution storage unit 200 to the mixing unit 500, so that the concentration of the nutrient solution stored in the waste nutrient solution or the mixing unit 500 stored in the waste nutrient solution storage unit 200 Will control.

The mixing unit 500 receives the waste nutrient solution, the nutrient solution, and the acid from the waste nutrient storage unit 200 and the nutrient solution storage unit 300, and then mixes the supplied nutrient solution to the cultivation bed 10.

The mixing unit 500 may include a measurement sensor (not shown) for measuring the pH value and the electrical conductivity (EC) value of the waste nutrient solution supplied from the waste nutrient solution storage unit 200. When the measuring sensor (not shown) measuring the pH value and the EC value measures the pH value and the EC value of the waste nutrient solution, the control unit 600 should be supplied from the nutrient solution storage unit 300 for optimal growth of the crop based thereon. Calculate the amount of nutrient solution and acid to control the amount of nutrient solution and acid supplied from the nutrient solution storage unit 300 to the mixing unit 500 through this.

The mixing unit 500 may include a mixing tank 510 and a watering pump 520 for transferring the nutrient solution stored in the mixing tank 510 to the cultivation vessel 10.

The controller 600 controls the operations of the waste nutrient solution collecting unit 100, the waste nutrient solution storage unit 200, the nutrient solution storage unit 300, the raw water supply unit 400, and the mixing unit 500.

That is, the overall operation of the circulating hydroponic cultivation of the present invention, such as the movement of the nutrient solution, the temperature control of the waste nutrient solution storage unit 200 and the raw water supply unit 400, the amount of nutrient solution supplied from the nutrient solution storage unit 300 to the mixing unit 500 To control.

In addition, the circulating hydroponic cultivation system according to an embodiment of the present invention may further include an oxygen supplier 700 for supplying oxygen to the nutrient solution supplied from the mixing unit 500 to the cultivation bed (10).

Since the amount of dissolved oxygen contained in the nutrient solution varies depending on the type of crop, the cultivation temperature, and the like, the oxygen supply 700 controls the dissolved oxygen concentration included in the nutrient solution supplied from the mixing unit 500 to the cultivation bed 10, thereby It can improve the growth rate.

3 is a schematic flowchart of a hydroponic cultivation method according to an embodiment of the present invention.

The circulating hydroponic cultivation method according to an embodiment of the present invention is a method for cultivating crops using the circulating hydroponic cultivation system described above. Applicable to the method.

Referring to Figure 3, the circulating hydroponic cultivation method according to an embodiment of the present invention is the waste nutrient solution collecting step (S100), waste nutrient solution storage step (S200), mixing step (S300), and nutrient solution supply step (S400) It can be made, including.

In order to cultivate crops by the circulating hydroponic cultivation method, first, waste nutrient solution is collected from the cultivation bed and stored in the waste nutrient solution collecting unit (S100).

On the other hand, when the waste nutrient solution stored in the waste nutrient solution collection unit exceeds a predetermined level, the waste nutrient solution collecting unit may supply the waste nutrient solution to the waste nutrient solution storage unit.

Next, the waste nutrient solution stored in the waste nutrient solution collecting unit is received and sterilized and stored in the waste nutrient solution storage unit (S200).

At this time, the waste nutrient solution supplied from the waste nutrient solution collecting unit to the waste nutrient solution storage unit is preferably a waste nutrient solution from which impurities are removed through a filtration device.

Waste nutrient solution sterilization in the nutrient storage step (S200) may be made by circulating the stored nutrient solution every predetermined time.

On the other hand, the waste nutrient solution stored in the waste nutrient solution storage unit is preferably maintained at a temperature set to be suitable for the growth of the crop.

Next, the nutrient solution is mixed with the nutrient solution and acid supplied from the waste nutrient solution storage unit to prepare a nutrient solution and store it in the mixing unit (S300).

Here, the nutrient solution and the acid mixed with the waste nutrient solution preferably have a temperature suitable for the growth of the crop.

In addition, the nutrient solution prepared by mixing the nutrient solution with the nutrient solution and the acid preferably has a pH value and an EC value suitable for the growth of crops. To this end, in the nutrient solution mixing step (S300), after measuring the pH value and EC value of the nutrient solution supplied from the nutrient solution storage unit, it will control the amount of nutrient solution and acid mixed with the nutrient solution based on this.

Finally, by supplying the nutrient solution stored in the mixing unit to the cultivation bed (S500) it is possible to cultivate the crop by the hydroponic cultivation method.

At this time, it is preferable to supply oxygen to the nutrient solution supplied to the cultivation bed so that the nutrient solution supplied to the cultivation bed has a dissolved oxygen amount suitable for the growth of the crop.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10: Bed for planting
100: waste nutrient collection
200: waste nutrient storage unit
300: nutrient storage unit
400: raw water supply
500: mixing part
600:

Claims (17)

Collecting the waste nutrient solution from the cultivation bed and storing the waste nutrient solution in a waste nutrient solution collecting unit;
A waste nutrient storage step of sterilizing the waste nutrient solution supplied from the waste nutrient solution collecting unit and storing the waste nutrient solution in the waste nutrient solution storage unit;
Mixing the waste nutrient solution supplied from the waste nutrient solution storage unit with a nutrient solution having a predetermined temperature and an acid to prepare a nutrient solution having a predetermined pH value and an EC value and storing the mixed solution in a mixing unit; And
A nutrient solution supply step of supplying the nutrient solution stored in the mixing unit to the cultivation bed,
The waste nutrient storage step further includes the step of removing impurities through the sterilized waste nutrient solution through a filtration device,
The waste nutrient storage step is to maintain the stored waste nutrient solution at a predetermined temperature,
The nutrient solution supply step is circulating hydroponic cultivation method characterized in that for supplying oxygen to the nutrient solution so that the nutrient solution supplied to the cultivation bed has a predetermined dissolved oxygen amount. The method of claim 1,
The waste nutrient collection step,
Circulating hydroponic cultivation method, characterized in that for supplying the waste nutrient solution to the waste nutrient solution storage if the waste nutrient solution stored in the waste nutrient solution collection unit exceeds a predetermined level.
delete delete The method of claim 1,
The waste nutrient storage step,
The circulating hydroponic cultivation method, characterized in that the sterilized by circulating the stored nutrient solution every predetermined time.
delete delete delete A waste nutrient solution collecting part of the waste nutrient solution from the cultivation bed and including a level control sensor;
A waste nutrient storage unit sterilizing and storing the waste nutrient solution supplied from the waste nutrient solution collecting unit, and including a waste nutrient solution temperature controller;
A nutrient solution storage unit comprising a plurality of storage tanks in which nutrient solution and acid are stored;
A raw water supply unit supplying raw water to the nutrient solution storage unit and including a raw water temperature controller;
A mixing unit receiving the mixed nutrient solution, the nutrient solution, and the acid from the waste nutrient solution storage unit and the nutrient solution storage unit, and then supplying the mixed nutrient solution to the cultivation bed;
The nutrient solution and acid supplied from the nutrient solution storage unit to the mixing unit based on the values measured by the measuring sensor and controlling the operation of the waste nutrient collection unit, waste nutrient storage unit, nutrient solution storage unit, raw water supply unit, and mixing unit A control unit for controlling the amount; And
Including an oxygen supply for supplying oxygen to the nutrient solution supplied from the mixing unit to the cultivation bed,
The waste nutrient solution collecting unit,
And a filtration device for filtering the waste nutrient solution supplied from the collection tank to the waste nutrient solution storage unit, in which the collected waste nutrient solution is stored.
The mixing unit further comprises a measurement sensor for measuring the pH value and EC value of the waste nutrient solution supplied from the waste nutrient solution storage unit.
delete delete delete 10. The method of claim 9,
The waste nutrient storage unit includes a storage tank and a sterilization device,
The control unit is circulating hydroponic cultivation system, characterized in that for sterilizing and circulating the waste nutrient solution stored in the storage tank to the sterilization device every predetermined time.
10. The method of claim 9,
The raw water supply unit,
Circulating hydroponic cultivation system, characterized in that for further supplying raw water to at least one of the waste nutrient solution storage and the mixing unit.
delete delete delete

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