KR200328761Y1 - APPARATUS FOR DISINFECTING AGRICULTURAL PRODUCTS USING OZONE AND TiO2 PHOTOCATALYST - Google Patents

Abstract

The present invention relates to a agricultural product sterilization apparatus for removing pathogenic microorganisms and residual pesticides present in agricultural products, the agricultural product sterilization apparatus using ozone and TiO₂ photocatalyst of the present invention, ozone generator for generating ozone from high pressure oxygen or air In addition, the ozone generated by the ozone generator is introduced into the agricultural product ozone treatment tank for ozone sterilizing the pathogenic microorganisms of agricultural products or ozone decomposition of organic substances or organic synthetic pesticides attached to the agricultural products, and in the agricultural product ozone treatment tank, An ozone aeration device in communication with the generator to generate a high concentration of ozone sterilization water by spraying or mixing ozone generated by the ozone generator into water in the agricultural product ozone treatment tank, and provided in the agricultural product ozone treatment tank, including an ultraviolet lamp and a TiO₂ Activated ozone sterilizing water, including photocatalyst, TiO2 photocatalytic activator for sterilizing original microorganisms or decomposing organic substances or organic synthetic pesticides attached to agricultural products, a power supply device for supplying power to an ultraviolet lamp of the TiO₂ photocatalytic activator to control ultraviolet light emission, and the agricultural product ozone And an ozone sterilizing water circulating device for circulating the ozone sterilizing water to increase the contact between the agricultural products contained in the treatment tank and the ozone sterilizing water.

Description

Agricultural product sterilization apparatus using ozone and titanium dioxide photocatalyst {APPARATUS FOR DISINFECTECT AGRICULTURAL PRODUCTS USING OZONE AND TiO2 PHOTOCATALYST}

The present invention relates to a agricultural product sterilization apparatus for removing pathogenic microorganisms and residual pesticides present in the agricultural products, and more specifically, to the phytopathogenic microorganisms that cause fruit softening (corruption) caused by agricultural products such as cold storage fruits or vegetables. The present invention relates to a agricultural product sterilization apparatus that sterilizes infectious agents and infectious agents and decomposes organic synthetic pesticides remaining in agricultural products.

Conventionally, in order to prevent cold disease (corruption) of cold storage fruits, chemical control methods using pesticides have been mainly used as a method for controlling plant pathogenic fungi, which causes caustic disease (corruption).

Chemical control using organic synthetic pesticides is generally the preferred method because of its immediate, simple and high effectiveness.However, the use of overpesticides and improper pesticides is causing human risks and residual toxicity in foods. It causes pollution problems, adversely affecting the ecosystem, and side effects such as drug resistance and resistance in the pathogenic microorganisms are appearing, and regulations on the use of pesticides in Korea as well as in developed countries are being tightened. There is an urgent need for the development of sterilization control methods.

The present invention was devised to solve the above problems, and by effectively treating ozone and TiO2 photocatalyst, it effectively sterilizes pathogenic microorganisms on the surface of stored agricultural products, and efficiently decomposes residual pesticides to fresh and eat. The purpose of the present invention is to provide a agricultural product sterilization apparatus that produces safe agricultural products.

Agricultural products sterilization apparatus using the ozone and TiO 2 photocatalyst of the present invention for achieving the above object, the ozone generator for generating ozone from high pressure oxygen or air, and the ozone generated by the ozone generator is introduced into the pathogenic microorganisms of agricultural products The agricultural product ozone treatment tank which ozone sterilizes or ozone decomposes organic substances or organic synthetic pesticides attached to the agricultural products, and the ozone generated in the agricultural product ozone treatment tank and communicated with the ozone generator and generated by the ozone generator. An ozone aeration apparatus for generating high concentration ozone sterilization water by spraying or mixing with water in the water, and disposed in the agricultural product ozone treatment tank, and including the ultraviolet lamp and TiO2 photocatalyst to activate the ozone sterilization water to sterilize pathogenic microorganisms of agricultural products. Powdered organic matter or organic synthetic pesticides TiO 2 photocatalytic activator to decompose, a power supply for supplying power to the UV lamp of the TiO 2 photocatalytic activator to control ultraviolet light emission, and to increase the contact between the agricultural products contained in the agricultural ozone treatment tank and ozone sterilization water It characterized in that it comprises an ozone sterilization water circulation device for circulating the ozone sterilization water.

1 is a schematic view showing the configuration of a agricultural product sterilization apparatus using ozone and TiO 2 photocatalyst according to the present invention,

2 is a block diagram of a TiO₂ photocatalyst activator according to an embodiment of the present invention,

Figure 3 is a graph showing the results of the concentration change of methylene blue over time,

Figure 4 is a graph showing the results of the germination rate of Phomopsis conidia spores of the hourly oyster fruit rot fungi according to an embodiment of the ozone and TiO₂ photocatalyst agricultural product sterilization treatment device of the present invention,

Figure 5 is a micrograph of Phomopsis conidia, which is a lynch fruit pathogen ,

6 is a germination inhibitory micrograph of the phomopsis conidia spores, which is a five-year sterilized fruit urea pathogenic bacterium sterilized according to an embodiment of the ozone and TiO 2 photocatalyst agricultural product sterilization apparatus of the present invention,

Figure 7 is a graph showing the concentration change of the organic synthetic pesticide flusidazole with time according to the embodiment of the ozone and TiO 2 photocatalyst agricultural product sterilization treatment apparatus of the present invention.

* Explanation of symbols for the main parts of the drawings

10: ozone generator 15: ozone supply / shutoff valve

16: Timer 20: Agricultural product ozonation tank

21: ozone / air discharge valve 22: ozone sterilization water discharge valve

30: ozone aerator 40: TiO₂ photocatalytic activator

41: TiO₂ photocatalytic activator body 42: UV lamp

43: quartz tube 44: TiO₂ photocatalyst coated sphere

45: water outlet 46: upper cap

47: lower cap 50: power supply

60: ozone sterilizing water circulation device 70: high pressure oxygen

Hereinafter, an apparatus for sterilizing agricultural products using ozone and TiO 2 photocatalyst of the present invention will be described in detail.

Agricultural product sterilization apparatus using ozone and TiO₂ photocatalyst of the present invention,

An ozone generator for generating ozone from high pressure oxygen or air;

An ozone treatment tank for introducing ozone generated by the ozone generator to ozone sterilize pathogenic microorganisms of agricultural products or to decompose organic substances or organic synthetic pesticides attached to agricultural products;

An ozone aeration apparatus provided in the agricultural product ozone treatment tank and in communication with the ozone generator to inject or mix ozone generated by the ozone generator into water in the agricultural product ozone treatment tank to generate a high concentration of ozone sterilization water;

A TiO₂ photocatalytic activator provided in the agricultural product ozone treatment tank and activating the ozone sterilization water including an ultraviolet lamp and a TiO 2 photocatalyst to sterilize pathogenic microorganisms of agricultural products or to decompose organic substances or organic synthetic pesticides attached to the agricultural products;

A power supply for supplying power to an ultraviolet lamp of the TiO2 photocatalyst activator to control ultraviolet light emission, and

It characterized in that it comprises an ozone sterilization water circulation device for circulating the ozone sterilization water to increase the contact between the agricultural products contained in the agricultural product ozone treatment tank and the ozone sterilization water.

Hereinafter, embodiments of the agricultural product sterilization apparatus using ozone and TiO 2 photocatalyst of the present invention will be described in detail according to the drawings. However, these embodiments are only examples of the present invention, the present invention is not limited thereto.

Figure 1 is a schematic diagram showing the configuration of the agricultural product sterilization treatment apparatus using ozone and TiO 2 photocatalyst according to the present invention.

The agricultural product sterilization apparatus of the present invention ozone generated ozone using high pressure oxygen (70) or air and ozone generated from the ozone generator (10) by introducing the ozone generated from the ozone generator (10) Agricultural product ozonation tank 20 for sterilizing or ozone decomposing organic substances or organic synthetic pesticides attached to the agricultural products.

The agricultural product ozone treatment tank 20 is sealed so that the introduced ozone does not leak to the outside, and the agricultural product inlet is provided so that the sterilized agricultural products and water can be introduced into the ozone treatment tank 20. The agricultural product ozone treatment tank 20 is preferably made of stainless steel, special acrylic plate, P.V.C, or the like so as to prevent external leakage of ozone.

The ozone aeration apparatus 30 is provided in the agricultural product ozone treatment tank 20. The ozone aerator 30 communicates with the ozone generator 10 to inject or mix ozone generated by the ozone generator 10 to water in the agricultural product ozone treatment tank 20, that is, a high concentration of ozone sterilization water, that is, High concentration of ozone is dissolved to produce water with sterilizing ability. It is preferable to perform ozone aeration so that the dissolved ozone concentration of ozone sterilized water is about 0.3 ppm or more.

In addition, the agricultural product ozone treatment tank 20 is provided with a TiO 2 photocatalytic activator 40, and the TiO 2 photocatalytic activator includes an ultraviolet lamp and a TiO 2 photocatalyst.

The TiO 2 photocatalyst has a valence band and a conduction band, and when ultraviolet rays irradiated from the ultraviolet lamp are applied to the TiO 2 photocatalyst, electrons are excited from the valence band to the conduction band. At this time, electrons (e ^_ ) are formed in the conduction band and holes (h +) are formed in the valence band, and the electrons and holes thus formed are superoxide anions (high concentration ozone) dissolved in the ozone sterilization water by strong oxidation or reduction. O ₂ ^-) was produced by free radicals, activate a stronger oxidation thereby to sterilize the pathogenic microorganisms of the agricultural products or decomposition of the organic or synthetic organic agricultural chemicals attached to agricultural products.

2 is a block diagram of a TiO 2 photocatalytic activator according to an embodiment of the present invention.

As shown in FIG. 2, the TiO 2 photocatalytic activator 40 includes a body 41 having a plurality of water outlets so that ozone sterilization water is introduced into the interior thereof, and an ultraviolet lamp for irradiating ultraviolet rays to the TiO 2 photocatalyst at the center thereof. 42).

The outside of the ultraviolet lamp 42 is surrounded by a quartz tube 43. The quartz tube 43 prevents direct contact between the ozone sterilizing water and the ultraviolet lamp 42, while passing the ultraviolet light emitted from the ultraviolet lamp 42 as it is. Between the quartz tube 43 and the body 41 is filled with a plurality of spheres 44 coated with a TiO 2 photocatalyst. The size of the spherical body is generally irrelevant, but in order to secure a sufficient contact area between the ozone sterilizing water and the spherical body 44, the diameter is preferably 1 to 20 mm, and more preferably 5 to 15 mm for the smooth passage of the ozone sterilizing water. Do. The inside of the spherical body 44 may be any material that can be coated with a TiO 2 photocatalyst, but alumina, ceramics, paper hancom, activated carbon, and the like are preferable.

The water passage 45 of the body 41 is smaller than the sphere 44 so that the sphere 44 coated with the TiO 2 photocatalyst does not flow out. As shown in FIG. 2, the body of the TiO 2 photocatalytic activator 40 of the present embodiment has a cylindrical shape, and the water passage 45 has a long slit shape.

The body 41 has an upper cap 46 which can be locked and unlocked by a helical groove so that the photocatalyst coated sphere 44, quartz tube 43 and ultraviolet lamp 42 can be replaced in the apparatus. A lower cap 47 is included and an O-ring is insertable for complete closure.

The power supply 42 controls the ultraviolet light emission by supplying power to the ultraviolet lamp 42 of the TiO 2 photocatalytic activator 40. It is preferable to emit short wavelength ultraviolet light of about 20W or more, and the wavelength is preferably UVC wavelength to promote photocatalytic activity and bactericidal action, but UVA wavelength including Bl order light may be used.

The agricultural product sterilization apparatus of the present invention includes an ozone sterilization water circulator 60 for circulating ozone sterilization water.

The ozone sterilization water circulation device 60 internally circulates the ozone sterilization water in the agricultural product ozone treatment tank 20 to enable smooth contact between the ozone sterilization water and the agricultural product, thereby increasing the effect of the agricultural product sterilization treatment. The ozone sterilization water circulator 60 may be installed in the agricultural product ozone treatment tank 20, installed outside thereof, and circulated to the inside of the ozone treatment tank 20 through a circulation pipe. It is possible.

The agricultural product ozone treatment tank 20 includes an ozone / air discharge valve 21 for discharging excess ozone or air that is not dissolved or left unused to the outside, and externally sterilizes the ozone sterilization water after the agricultural product sterilization treatment. Ozone sterilization water discharge valve 22 to be discharged to the.

Operation of the sterilization apparatus of the present invention made as described above is made as follows.

The agricultural product sterilization apparatus using ozone and TiO₂ photocatalyst for surface storage sterilization and decomposition of residual pesticides is installed indoors or outdoors or in storage.

With the device installed, fill the water so that the top of the agricultural product ozonation tank 20 has a margin of 15 cm before leaving the processed fruit, and perform ozone aeration with a dissolved ozone concentration of 0.3 ppm or more, and use short wavelength ultraviolet light of 20 W or more. By activating the TiO₂ photocatalyst, oxidized water with strong sterilization power is produced.

10 minutes while oxidizing water is continually generated and forced to circulate after immersing in the ozone sterilization water of the ozone sterilization tank 20 through the top cover opening device by putting a certain amount of the harvested fruit or storage fruit immediately before shipment into the net. Allow 30 minutes for processing. Using ozone and photocatalytic oxidized water with strong sterilization power, it can sterilize fruity pathogens and various by-product microorganisms (such as bacteria, viruses, and fungi) that are dormant on the surface of the stored fruit, and are sprayed during the cultivation process and remain on the fruit surface. Contaminated synthetic organic matter, including organic synthetic pesticides, can be decomposed enough to prevent the corruption of storage fruits without the use of pesticides, as well as to store or ship fresh and safe fruits. After the oxidation water treatment, the fruit is removed by washing the fruit or cold air drying or natural drying.

It can also be used by soaking vegetables or other crops in oxidized water and in this case, the same effect can be expected. In addition, the treated oxidized water is used for sterilization, disinfection and washing for other purposes or discharged through the ozone sterilization water discharge valve 22.

Experimental Example 1

Using the agricultural products processing apparatus using ozone and TiO₂ photocatalyst according to an embodiment of the present invention was tested and measured the organic degradation activity.

1) The water was supported in the agricultural product ozone treatment tank 20, and methylene blue dye was added to the agricultural product ozone treatment tank 20 as an organic compound to adjust the concentration so that the absorbance of the spectrophotometer was 0.7. .

2) Using ozone generator, supply ozone so that dissolved ozone concentration of agricultural product ozone treatment tank 20 becomes 0.3ppm, supply aeration, irradiate TiO₂ photocatalyst to 20W light intensity ultraviolet ray While a certain amount of sample was sampled over time, the absorbance of the spectrophotometer was measured to investigate the concentration change. For comparison, only ozone was treated and only TiO 2 photocatalyst was treated to investigate the concentration change.

3) Figure 3 is a graph showing the result of the concentration change of methylene blue over time. As shown in FIG. 3, it can be seen that the combined treatment of ozone and TiO 2 photocatalyst produced by the present invention shows much better organic decomposition activity than the treatment with ozone or TiO 2 photocatalyst alone. In particular, it could be confirmed that more than 90% of the hardly decomposable dyes were decomposed within about 40 minutes under the experimental conditions.

Experimental Example 2

Verification experiments were carried out to investigate the bactericidal activity of the propagation of spores of phytopathogenic fungi, which is a causative agent of fruit fever caused by storage and distribution of tuna, using the agricultural product processing apparatus using ozone and TiO₂ photocatalyst according to an embodiment of the present invention. Was carried out.

For the verification experiments above, while carrying the same effect as in the above embodiment, the water of the agricultural product sterilization treatment tank 20 is a small device having a capacity of 1L, and artificially cultured and secured by the wormwood fruit fungus Pomomorphosis Suspended condensed spores of Phomopsis sp. To adjust the spore concentration to 105 spores / ml, 1 minute, 3 minutes after treatment with TiO₂ photocatalyst treatment using dissolved ozone concentration 0.3ppm and 20W light intensity UV After 5 minutes, a sample of 50 ml was sampled and subjected to syringe filtration (0.45 μm in diameter microfilter) to collect spores sterilized by oxidized water with a filter, followed by washing the filter with a predetermined amount of sterile water to recover the spores. After the suspension was incubated at 25 ° C. for 24 hours, the germination rate per 100 spores was examined under a microscope.

Figure 4 is a graph showing the results of the germination rate of Phomopsis conidia spores, which is an hourly sesame fruit pathogen , according to an embodiment of the ozone and TiO₂ photocatalyst agricultural product sterilization treatment device of the present invention,

FIG. 5 is a micrograph of Phomopsis conidia, which is a wormwood fungus pathogen ,

Figure 6 is a germination inhibitory micrograph of Phomopsis conidia spores, which is a five-year sterilized fruit rot fungi according to an embodiment of the ozone and TiO 2 photocatalyst agricultural product sterilization apparatus of the present invention.

As shown in Figure 4, the agricultural product sterilization treatment apparatus using ozone and TiO₂ photocatalyst according to the present invention can be seen to exhibit a far superior sterilization activity than ozone or TiO₂ photocatalyst treatment alone, as shown in Figure 5, ozone and TiO₂ It can be seen that within 5 minutes of photocatalyst treatment, approximately 95% of pathogenic spores (arrows) are disinfected and inactivated.

Experimental Example 3

In order to investigate the degradation activity of organic synthetic pesticides remaining on the fruit surface according to the spraying of pesticides before or during the storage of fruit, the organic ozone treatment tank 20 has been proved to be an excellent effect as a model organic synthetic pesticide as a sesame fruit medicinal agent. Flusidazol raw agent (purity 95%) was added to adjust the concentration to 100ppm initial concentration, and then the same experiment as in Experimental Example 1.

After a certain amount of sample was sampled over time, the concentration change was measured by gas chromatography according to the flusilazole residual method of the Institute of Agricultural Science and Technology.

Figure 7 is a graph showing the concentration change of the organic synthetic pesticide flusidazole with time according to the embodiment of the ozone and TiO 2 photocatalyst agricultural product sterilization treatment apparatus of the present invention.

As shown in Figure 7, the agricultural product sterilization treatment using the ozone and TiO₂ photocatalyst according to the present invention can be confirmed that the decomposition effect of organic synthetic pesticides excellent, about 60% pesticide decomposition effect was confirmed in 1 hour under the experimental conditions. .

Example 4

In order to investigate the effect of control of fruit purifying disease occurring during fruit storage using the agricultural product processing apparatus using ozone and TiO₂ photocatalyst according to an embodiment of the present invention, by supporting water in the agricultural product ozone treatment tank (20) and without pesticide treatment in cultivation packaging After immersing the harvested sesame seeds in a net of 30 units, and then immersed in a 0.3 unit of dissolved ozone concentration of the agricultural product ozone treatment tank (20) and a TiO₂ photocatalyst treatment using 20W light intensity ultraviolet rays for 30 minutes, take out the room temperature After 24 hours of natural air drying at 2 ℃ storage for 3 months in 25 ℃ incubator for two weeks to ripen fruit was investigated for the degree of fruit blight. In order to compare the effect of fruit sterilization by the agricultural product sterilization treatment device of the present invention, the preparation of Futabicide (flusidazole hydrate) was prepared to the recommended concentration, soaking the sesame fruit for 30 minutes, and then treated in the same way as the above method. The degree was compared.

Table 1 shows the result of fruit control of the fruit spray bottle of the ozone and TiO₂ photocatalyst combined treatment device carried out according to the method described above.

Occurrence fault rate (%) Corruption Per Fruit Caused by Atmospheric Diseases (%) Fruit softener control effect (%) No treatment 93.3 58.92 - Pesticide Treatment 73.3 13.1 77.8 Ozone and TiO₂ photocatalyst sterilization 80.0 13.5 77.1

As shown in Table 1, the agricultural product sterilization treatment using ozone and TiO₂ photocatalyst according to the present invention was almost the same as the effect of organic synthetic pesticides inhibiting the occurrence of sesame fruit stalk disease, showing more than 75% sesame fruit control effect It was confirmed that fruiting disease occurrence suppression effect is excellent.

As described above, the apparatus for sterilizing agricultural products using the ozone and TiO₂ photocatalyst of the present invention effectively suppresses the occurrence of long-term storage fruit, and dispels the distrust and doubt of consumers due to the use of organic synthetic pesticides to control the fruit-sickness disease, and improves food safety. This ensured supply of stored agricultural products can contribute to the improvement of public health, as well as providing an environmentally friendly and economical control method that eliminates the side effects of using organic synthetic pesticides.

Claims (4)

An ozone generator 10 generating ozone from high pressure oxygen or air; A product ozone treatment tank 20 for ozone sterilizing pathogenic microorganisms of agricultural products or ozone decomposing organic substances or organic synthetic pesticides attached to agricultural products by introducing ozone generated by the ozone generator 10; It is provided in the agricultural product ozone treatment tank 20, the ozone generated by the ozone generator 10 in communication with the ozone generator 10 is sprayed or mixed with water in the agricultural product ozone treatment tank 20 to make a high concentration of ozone. An ozone aeration apparatus 30 for generating sterilizing water; TiO₂ photocatalytic activity provided in the agricultural product ozone treatment tank 20 to kill the pathogenic microorganisms of agricultural products or decompose organic substances or organic synthetic pesticides attached to agricultural products by activating the ozone sterilization water, including an ultraviolet lamp and a TiO₂ photocatalyst. Device 40; A power supply device 50 for supplying power to an ultraviolet lamp of the TiO2 photocatalyst activator 40 to control ultraviolet light emission; And Agricultural product sterilization using ozone and TiO₂ photocatalyst, characterized in that it comprises an ozone sterilization water circulation device 60 for circulating the ozone sterilization water to increase the contact between the agricultural products contained in the agricultural product ozone treatment tank 20 and the ozone sterilization water. Processing unit. According to claim 1, wherein the TiO2 photocatalytic activator 40 is a UV lamp 42, a quartz tube 43 for sealing the ultraviolet lamp 42, and the TiO₂ photocatalyst is coated on the outside of the quartz tube 43 Agricultural products sterilization apparatus using ozone and TiO2 photocatalyst, characterized in that it comprises a plurality of spherical bodies 44 and the body 41, the water passing through the ozone sterilization of the agricultural product ozone treatment tank 20 in contact with the spherical body. . According to claim 1 or claim 2, The agricultural product ozone treatment tank 20 is ozone / air discharge valve 21 for discharging the ozone or air to the outside and the ozone sterilization water discharged to the outside after the agricultural product sterilization treatment Agricultural product sterilization treatment apparatus using ozone and TiO2 photocatalyst, characterized in that it further comprises an ozone sterilizing water discharge valve (22). The ozone supply / shut-off valve (15) according to claim 1 or 2, wherein the ozone generated from the ozone generator (10) is provided on an ozone connecting pipe for transferring the ozone generated from the ozone generator (20) to the agricultural product ozone treatment tank (20); Agricultural products sterilization apparatus using ozone and TiO2 photocatalyst, characterized in that further comprises a timer (16) for controlling the opening and closing time of the ozone supply / shut-off valve (15).