KR20170027905A - Drainage solution recycling system - Google Patents

Abstract

The present invention relates to a drainage solution recycling system. The drainage solution recycling system comprises: a nutrient solution supplying device for supplying a nutrient solution to a growing facility; a raw water supplying tank for supplying raw water to the nutrient solution supplying device; a drainage solution collecting unit for collecting a drainage solution remaining in the growing facility; a drainage solution filtering and sterilizing unit for filtering and sterilizing the drainage solution collected by the drainage solution collecting unit; a drainage solution supplying tank for storing the filtered and sterilized drainage solution by the drainage solution filtering and sterilizing unit; a mixing valve module for mixing the raw water from the raw water supplying tank and the drainage solution from the drainage solution supplying tank, and supplying a mixture to the nutrient solution supplying device; and a drainage solution recycling control unit for controlling the mixing valve module, so an EC concentration of mixed raw water mixed by the mixing valve module and supplied to the nutrient solution supplying device is maintained at a predetermined standard concentration. Accordingly, a drainage solution remaining in a growing facility is recycled, and an EC concentration of mixed raw water is adjusted by using a 3-way valve-type mixing valve module not to affect the growth of crops. Thus, a drainage solution is recycled, and thus effects applied to the growth of crops are minimized. Consequently, a drainage solution can be more effectively recycled.

Description

{DRAINAGE SOLUTION RECYCLING SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage recycling system, and more particularly, to a drainage recycling system capable of recycling a drainage solution remaining in a nutrient solution supplied to a cultivation facility.

Generally, hydroponic cultivation is a scientific farming technique in which various crops are cultivated by supplying a nutrient solution containing nutrients necessary for plant growth. This kind of nutrient solution cultivation is able to grow plants by planting crops in the medium and supplying water and nutrient solution, and thus it is advantageous for prevention of insect pests and diseases, and it is possible to produce pollution-free crops by pesticide- .

The main environmental conditions required for nutrient solution cultivation are concentration and acidity of nutrient solution. Concentration and acidity of nutrient solution required according to cultivated crops are affected by growth of cultivated crops, Automated systems are available that can automatically adjust conditions and implement irrigation.

In Korean Utility Model Registration No. 20-0179670 (Feb. 11, 2000, Feb. 11, 2000, automatic nutrient solution feeding device equipped with concentration / acidity measuring device), the concentration and acidity of the nutrient solution supplied to the culture medium are automatically measured, And the concentration and the acidity are controlled.

On the other hand, in the nutrient solution cultivation, the nutrient remaining after being supplied to the cultivation facility is generally called drainage. It is generally known that crops absorb more than 70% of the nutrients supplied to the cultivation facilities in the nutrient solution cultivation and the remaining 30% of the nutrient solution is suitable for crop growth.

However, if the drainage solution used in the cultivation facility is discharged outside the cultivation facility, it acts as a pollution source of the soil or the river, thereby causing pollution of the environment. Also, from the viewpoint of the farmer who operates the cultivation facility, there is a problem that the drainage is costly as much as it is abandoned.

Therefore, if a technology capable of recycling abandoned drainage is proposed, it may be preferable in terms of prevention of environmental pollution and cost reduction of cultivated farmers.

Accordingly, it is an object of the present invention to provide a drainage recycling system capable of recycling the remaining drainage liquid supplied to a cultivation facility.

According to the present invention, said object is achieved by a nutrient supply device for supplying a nutrient solution to a cultivation facility; A raw water supply tank for supplying raw water to the nutrient supply device; A drain collector for collecting drainage remaining in the cultivation facility; A drain filtration and sterilizing section for filtering and sterilizing the drain collected by the drain collection section; A drainage supply tank for storing drainage filtered and sterilized by the drainage filtration and sterilizing unit; A mixing valve module for mixing the raw water from the raw water supply tank and the drain from the drainage supply tank so as to be supplied to the nutrient solution supply device; And a drain recycle control unit for controlling the mixing valve module so that the EC concentration of the mixed raw water mixed by the mixing valve module and supplied to the nutrient solution supply unit is maintained at a preset reference concentration .

Here, the mixing valve module includes a three-way valve connected to the nutrient solution supply device, the raw water supply tank and the drainage supply tank, respectively; The drain recycle control unit may control the three-way valve so that the ratio of the raw water from the raw water supply tank to the drainage from the drainage supply tank is adjusted to maintain the reference concentration.

And further comprising an EC sensor for sensing an EC concentration of the mixed raw water supplied from the mixing valve module to the nutrient solution supply unit; The drainage recycling control unit may control the mixing valve module based on the EC concentration sensed by the EC sensor.

The drain collecting unit includes a drain collecting tank connected to the drain filtration and sterilizing unit; A drain collection pump for supplying the drainage remaining in the cultivation facility to the drainage collection tank so that drainage is collected in the drainage collection tank; And a drain water pump for supplying the drain collected in the drain collection tank to the drain filtration and sterilizing unit.

The drain filtration and sterilizing unit includes a drain filtration unit for filtering foreign substances contained in the drainage from the drainage collection unit; And a liquid disinfecting section for sterilizing the waste liquid filtered by the liquid filter section.

In addition, the liquid sterilization unit can sterilize the drain by the photocatalytic UV sterilization method.

According to the present invention, there is provided a drainage recycling system capable of recycling drainage remaining in a nutrient solution supplied to a cultivation facility.

Also, by regulating the EC concentration of the mixed raw water by using a 3-way valve type mixed valve module so as not to affect crop cultivation while reusing the remaining drainage from the cultivation facility, it is possible to recycle the drainage, It is possible to minimize the effect and recycle the effluent more efficiently and effectively.

1 is a view showing a configuration of a drainage and recycling system according to the present invention,
2 is a control block diagram of a drain recovery system according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the construction of a drainage recycling system 100 according to the present invention, and FIG. 2 is a control block diagram of a drainage recycling system 100 according to the present invention. 1 and 2, a drainage recycling system 100 according to the present invention includes a nutrient solution supply unit 110, a raw water supply tank 120, a drainage collection unit 130, a drainage filtration and sterilizing unit 140 A drainage supply tank 150, a mixing valve module 160, and a drainage / recycle control unit 190. The drainage /

The nutrient solution supply device 110 supplies the nutrient solution to the cultivation facility. The nutrient solution supply unit 110 mixes the nutrient solution necessary for crop cultivation with the mixed raw water supplied through the mixing valve module 160 to supply nutrient solution of a certain concentration to the cultivation facility. The construction of the nutrient solution supply device 110 according to the present invention can be provided in various forms, and a detailed description thereof will be omitted.

The raw water supply tank 120 supplies raw water to the nutrient solution supply unit 110. The raw water supplied from the raw water supply tank 120 is mixed with the drainage supplied from the drainage supply tank 150 through the mixing valve module 160 And is supplied to the nutrient supply device 110.

The drain collection unit 130 collects the remaining nutrient solution, i.e., drainage, which is used in the cultivation facility. 1, the drain collecting unit 130 may include a drain collecting tank 134, a drain collecting pump 132, and a drainage pump.

The drain collecting pump 132 supplies the drainage remaining in the cultivation facility to the drainage collection tank 134 so that drainage is collected in the drainage collection tank 134. Here, in the cultivation facility, there may be provided a drainage collection tank 131 for collecting the remaining drainage used. In a case where a plurality of cultivation facilities are provided, a drainage collection tank 131 is provided in each cultivation facility, The drainage of each cultivation facility may be collected to the drainage collection tank 134 through a pipeline connected to the drainage collection tank 131.

The drain collecting tank 134 is connected to the drain filtration and sterilizing unit 140 and supplies the drain collected in the drain collection tank 134 to the drain filtration and sterilizing unit 140 in accordance with the operation of the drain water pump 135 .

Here, the drain collecting part 130 according to the present invention may include a collecting filter 133 as shown in FIG. The drain collected through the drain collecting pump 132 into the drain collecting tank 134 can be primarily removed by passing through the collecting filter 133.

On the other hand, the drainage from the drainage collection tank 134 is supplied to the drainage filtration and sterilizing section 140 in accordance with the operation of the drainage water pump 135, and the drainage in the drainage filtration and sterilizing section 140 is secondarily filtration and sterilization do.

The draining filtration and sterilizing unit 140 according to the present invention may include a draining filtration unit 142 and a drain sterilizing unit 143 as shown in FIG. Also, the drain filtration and sterilizing section 140 may include a drain supply valve 144 and a drain flow meter 145.

The draining filtration unit 142 primarily filters the foreign substances contained in the draining from the draining collection unit 130. In the present invention, the drainage filtration unit 142 is provided in the form of a sand filter, and foreign substances contained in the drainage from the drainage collection unit 130 are filtered.

The liquid pervious sterilizer 143 sterilizes the drained solution filtered by the drain filtration unit 142. In the present invention, the example of sterilization of drainage by the liquid sterilizing unit 143 through the UV sterilization method is exemplified by a photocatalytic UV sterilization method using a photocatalyst.

Through the above-described process, foreign matter, pollutants, microorganisms, or the like contained in the drain collected from the cultivation facility are removed, thereby being able to be recycled.

Here, the drainage supply valve 144 is kept blocked while the drainage sterilization is performed by the drainage sterilizer 143, and after the sterilization is completed, the drainage that has been opened and filtered and sterilized flows into the drainage supply tank 150 . Here, the draining feed valve 144 may be provided so as to be cut off and opened under the control of the draining / recycling control unit 190.

The drainage flowmeter 145 detects the flow rate of the drainage flowing into the drainage supply tank 150 and notifies the drainage recycle control unit 190 of the amount of drainage flowing into the drainage storage tank Check the flow rate.

As described above, the draining through the filtration and sterilization process is stored in the drainage supply tank 150. Here, the drainage supplied from the drainage supply tank 150 to the nutrient solution supply device 110 and the raw water supplied from the raw water supply tank 120 to the nutrient solution supply device 110 are mixed with each other according to the operation of the nutrient solution supply pump 170 Is mixed in the valve module (160) to form mixed raw water and then supplied to the nutrient solution supply device (110).

At this time, the drainage recycling control unit 190 controls the mixing valve module 160 so that the EC concentration of the mixed raw water mixed by the mixing valve module 160 and supplied to the nutrient solution supply unit 110 is maintained at a predetermined reference concentration do.

An EC sensor 180 may be installed on the pipeline connected to the mixing valve module 160 from the mixing valve module 160 to sense the concentration of EC in the mixed raw water. The mixing valve module 160 can be controlled based on the EC concentration of the mixed raw water detected by the mixing unit 180. [

In the present invention, the mixing valve module 160 is provided in the form of a three-way valve connected to the nutrient solution supply device 110, the raw water supply tank 120, and the drainage supply tank 150, respectively. Thus, the drainage recycling control unit 190 controls the three-way valve so that the ratio of the raw water from the raw water supply tank 120 to the drainage from the drainage supply tank 150 is controlled and supplied to the nutrient solution supply unit 110 The mixed raw water is controlled to be maintained at the reference concentration.

For example, the drainage recycling control unit 190 controls the amount of drainage from the raw water supply tank 120 and the drainage supply tank 150 in a ratio of 8 to 2, or in a ratio of 7 to 3, By controlling the valve, the concentration of the mixed raw water is controlled.

In the present invention, 0.4 is applied as a reference concentration. Since the EC concentration of the raw water is usually 0.2 to 0.5% and the concentration of the drainage is 2.0 or more, the amount of the drainage that is recycled so that the concentration of the mixed raw water is maintained at the reference concentration of 0.4 .

This is because, in the case of drainage collected in a cultivation facility, the nutrient A is exhausted and the nutrient B is in an abundant state, so that the EC concentration of the mixed raw water is supplied to the nutrient solution feeder 110 The following problems may arise.

In the nutrient solution supply unit 110, the EC concentration is adjusted by mixing nutrients and raw water mixed at a specific ratio. When the EC concentration of the mixed water is high, the amount of the nutrient solution is reduced.

In this case, in the case of the nutrient solution supplied from the nutrient solution feeder 110 to the cultivation facility in the case where all of the A spirits are exhausted and the B nutrients are abundant as described above, the nutrient A is in a deficiency state and the B nutrient is in an excess state As shown in FIG.

Therefore, the drainage recycling system 100 according to the present invention regulates the EC concentration of the mixed raw water by using the three-way valve type mixing valve module 160 so that the drainage remaining in the cultivation facility is recycled, .

As a result, while the drainage is recycled, the influence on the cultivation of the crop is minimized in accordance with the recycling of the drainage, thereby making it possible to more efficiently and effectively recycle the drainage.

Further, only the additional structure necessary for draining and recycling can be additionally provided, and the existing nutrient solution supply device 110 can be utilized as it is.

Although several embodiments of the present invention have been shown and described, those skilled in the art will readily appreciate that many modifications may be made without departing from the spirit or scope of the invention . The scope of the invention will be determined by the appended claims and their equivalents.

100: drainage recycling system 110: nutrient solution supply device
120: raw water supply tank 130:
131: Drain collecting tank 132: Drain collecting pump
133: Collection filter 134: Drain collection tank
135: drainage feedwater pump 140: drainage filtration and sterilization part
142: Drain filtration section 143: Drain sterilization section
144: Drainage supply valve 145: Drainage flowmeter
150: Drain supply tank 160: Mixing valve module
170: Nutrient supply pump 180: EC sensor
190: drainage recycle control unit

Claims (6)

A nutrient supply device for supplying a nutrient solution to a cultivation facility;
A raw water supply tank for supplying raw water to the nutrient supply device;
A drain collector for collecting drainage remaining in the cultivation facility;
A drain filtration and sterilizing section for filtering and sterilizing the drain collected by the drain collection section;
A drainage supply tank for storing drainage filtered and sterilized by the drainage filtration and sterilizing unit;
A mixing valve module for mixing the raw water from the raw water supply tank and the drain from the drainage supply tank so as to be supplied to the nutrient solution supply device;
And a drain recycle control unit for controlling the mixing valve module so that the EC concentration of the mixed raw water mixed by the mixing valve module and supplied to the nutrient solution supply unit is maintained at a preset reference concentration. The method according to claim 1,
Wherein the mixing valve module includes a three-way valve connected to the nutrient solution supply device, the raw water supply tank and the drainage supply tank, respectively;
Wherein the drainage recycling control unit controls the three-way valve so that the ratio of the raw water from the raw water supply tank to the drainage from the drainage supply tank is adjusted to maintain the reference concentration. The method according to claim 1,
Further comprising: an EC sensor for sensing an EC concentration of the mixed raw water supplied from the mixing valve module to the nutrient solution supplying device;
Wherein the drain recovery recycle control unit controls the mixing valve module based on the EC concentration detected by the EC sensor. The method according to claim 1,
The drain collecting unit
A drain collecting tank connected to the drain filtration and sterilizing unit;
A drain collection pump for supplying the drainage remaining in the cultivation facility to the drainage collection tank so that drainage is collected in the drainage collection tank;
And a drain feed pump for feeding the drain collected in the drain collection tank to the drain filtration and sterilizing unit. The method according to claim 1,
The draining filtration and sterilizing section
A drain filtration unit for filtering the foreign substances contained in the drainage from the drainage collection unit;
And a drain sterilizer for sterilizing the drain filtered by the drain filter. 6. The method of claim 5,
Wherein the liquid-disinfecting unit sterilizes the waste liquid by a photocatalytic UV sterilization method.

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