CN109566968B - Device for treating wheat grains by utilizing ultraviolet rays and treatment method thereof - Google Patents
Device for treating wheat grains by utilizing ultraviolet rays and treatment method thereof Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/27—Removal of unwanted matter, e.g. deodorisation or detoxification by chemical treatment, by adsorption or by absorption
- A23L5/276—Treatment with inorganic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Cereal-Derived Products (AREA)
Abstract
The utility model provides an utilize ultraviolet ray to handle device of wheat grain, including the retort, be equipped with first board in the retort, the second board, the third board, first board, the second board is the screen cloth board, be equipped with a plurality of gas pockets on the third board, the retort corresponds third board lower part department and is equipped with the pipeline, the pipeline links to each other with compressed air source, be equipped with the filler mouth between retort corresponds first board and the second board, the retort corresponds first board top and is equipped with the air exit, the retort top inboard is connected with the ultraviolet lamp, first with 254nm wavelength ultraviolet lamp and compressed air's air supply, the radiation light intensity 320mJ/cm 2, handle wheat grain 10-15min, then change dress 185nm wavelength ultraviolet lamp and pure oxygen compressed air supply, the radiation light intensity 150mJ/cm 2, handle wheat grain 10-15min. The device and the treatment method can reduce the contents of aflatoxin B1 and vomitoxin in wheat grains, and have the advantages of simple steps, good treatment effect and high efficiency.
Description
Technical Field
The invention relates to a device for treating wheat grains by ultraviolet rays and a treatment method thereof.
Background
The contamination of food and feed with mycotoxins is very common and both agricultural and livestock products are compromised by mycotoxins.
Mycotoxins seriously damage animal bodies and further affect the physical health of people, and prevention and detoxification of mycotoxins have been the focus of industry. The mycotoxins are of various types and have different toxic effects on animals and human bodies, and aflatoxin Bl and vomitoxin are commonly found in pollution of crops and feeds. In practical use, mildewcides are widely used. The mildew preventive mainly aims at inhibiting the growth of mildew and preventing the generation of mycotoxin. For feeds and crops that have been contaminated with mycotoxins, there are fewer solutions.
For wheat grains, aflatoxin B1 and vomitoxin mainly exist in bran layers of the wheat grains, the aflatoxin B1 has the characteristic of heat resistance, is not destroyed even when heated at 100 ℃ for 20 hours, is only cracked at a high temperature of more than 270 ℃ and 0 ℃, DON is still stable when heated at 100 ℃ and 120 ℃ for 1 hour, and is partially destroyed when heated at 170 ℃ for 15 minutes. It is difficult to detoxify by heating.
The research on the removal of aflatoxin B1 and vomitoxin in wheat grains is not better than that of other agricultural products at present, and the method is basically blank in the aspect of removing the aflatoxin B1 and vomitoxin in the wheat grains by adopting a green physical method. The wheat polluted by the mycotoxin is detoxified by adopting a proper detoxification method, so that the pollution level of the mycotoxin can be reduced, and the harm of the toxin to animals and human beings is reduced. Common detoxification methods are: physical detoxification methods including water washing, removal, degerming and detoxification, solvent extraction, heating and detoxification, radiation, adsorbent adsorption, etc.; chemical detoxification methods including acid treatment, alkali treatment, addition of other chemicals, etc.; the biological detoxication method mainly utilizes the microorganism itself or the enzyme produced by the microorganism to degrade mycotoxin. The most common method is to add mycotoxin adsorbent to the ration. In the methods, a certain substance is required to be added into the wheat grains, so that secondary pollution is easy to cause, and in addition, the added substance has the problem of how to remove.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a device for treating wheat grains by ultraviolet rays, and the content of aflatoxin B1 and vomitoxin in the wheat grains can be reduced by the device.
The second technical problem to be solved by the invention is to provide a treatment method of a device for treating wheat grains by ultraviolet rays, which has simple steps, good treatment effect and high efficiency.
The invention provides a device for treating wheat grains by utilizing ultraviolet rays, which comprises a reaction tank which is vertically arranged and sealed up and down, wherein a first plate, a second plate and a third plate which are horizontally arranged and are vertically spaced are arranged in the reaction tank, 60-mesh screen plates are adopted for the first plate and the second plate, a plurality of air holes penetrating through the third plate vertically are arranged on the third plate, the air holes are arranged in a determinant mode on the third plate, the diameter of each air hole is 2cm, the center distance between any two adjacent air holes in each row or each column is 20cm, a pipeline which is communicated with the inside and the outside of the reaction tank is arranged at the lower part of the side wall of the reaction tank, one side of the pipeline far away from the reaction tank is connected with a compressed air source, a filler opening which is communicated with the inside and the outside of the reaction tank is arranged at the side wall of the reaction tank, a cover body which covers the filler opening is arranged at the position corresponding to the filler opening on the outside of the reaction tank, a plurality of air holes are arranged at the position corresponding to the upper side of the first plate, and the ultraviolet light tube is connected in parallel to the inside and outside of the reaction tank, and the ultraviolet light tube is connected in parallel with the outside of the reaction tank.
Preferably, the ultraviolet light tubes are elongated and are all arranged at equal intervals along the width direction of the ultraviolet light tubes.
In order to solve the second technical problem, the present invention also provides a processing method of an apparatus for processing wheat grains using ultraviolet rays, the method comprising the steps of:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept to be 320mJ/cm 2 through a controller, and the stability is kept for 3-5min;
(2) Putting wheat grains to be treated on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to be kept in a rolling state between the first plate and the second plate, and taking out the wheat grains after 10-15min of treatment;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 3-5min;
(4) And finally, putting the wheat grains treated by the first part on a second plate from a filling port, starting a pure oxygen compressed air source to keep the wheat grains in a rolling state between the first plate and the second plate, and taking out the wheat grains after 10-15min of treatment.
The invention has the advantages that: the device for treating wheat grains by utilizing ultraviolet rays has a simple structure, and the treatment method is simple and convenient, and can reduce the contents of aflatoxin B1 and vomitoxin in the wheat grains by treating the wheat grains twice by using ultraviolet lamp tubes with different wavelengths and different illumination intensities. Can meet the limit of mycotoxin in food safety national standard food (GB 2761-2011) and is made of wheat flour in food: related standard with aflatoxin B1 limit index of 5 (mug/kg) and vomitoxin limit index of 1000 (mug/kg).
Ultraviolet photolysis is a technology for decomposing or removing organic pollutants by isomerizing the structure of the organic pollutants or breaking and rearranging chemical bonds to generate new compounds under the irradiation of ultraviolet light in a specific wave band. In the first step, ultraviolet rays with the wavelength of 254nm are adopted to decompose aflatoxin B1 and vomitoxin molecular chains on the surface of wheat grains, and the macromolecular structures of the aflatoxin B1 and vomitoxin molecular chains are broken into small molecular structures. Wheat germs in wheat grains are rich in lipid, and are easy to generate aflatoxin B1, and vomitoxin is caused by wheat scab, so that most of aflatoxin B1 and vomitoxin in the wheat grains exist on the surfaces of the wheat grains, and the ultraviolet rays with the wavelength of 254nm decompose aflatoxin Bl and vomitoxin molecular chains on the surfaces of the wheat grains, so that only macromolecular structures of the aflatoxin B1 and vomitoxin are broken into small molecular structures. The composition of the resultant is difficult to determine, so that ultraviolet rays with 185nm wavelength are adopted to decompose oxygen molecules to generate free oxygen, namely active oxygen, and the free oxygen needs to be combined with the oxygen molecules due to unbalance of positive and negative electrons carried by the free oxygen, so that ozone is generated, and the ozone further oxidizes aflatoxin Bl and vomitoxin on the surface of wheat grains to generate small molecular substances in the first step of treatment, such as harmless CO 2、H2 O and the like. And at the same time, further removing aflatoxin B1 and vomitoxin. In order to improve the efficiency, a pure oxygen compressed air source is adopted to replace an air compressed air source, so that the ozone concentration is improved, the irradiation intensity and irradiation time of high-energy ultraviolet rays are reduced, and the physicochemical properties of endosperm in wheat grains are not damaged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of fig. 1 from a direction.
Fig. 3 is a B-direction enlarged view of fig. 1.
Detailed Description
Embodiment one:
Referring to fig. 1-3, a device for processing wheat grains by ultraviolet rays comprises a reaction tank 1 which is vertically arranged and sealed up and down, wherein a first plate 11, a second plate 12 and a third plate 13 which are horizontally arranged and spaced up and down are arranged in the reaction tank 1, 60-mesh screen plates are adopted by the first plate 11 and the second plate 12, a plurality of air holes 131 which vertically penetrate through the third plate 13 are arranged on the third plate 13 (16 air holes 131 are arranged according to 4 x 4 in the embodiment), the air holes 131 are arranged on the third plate 13 in a row and column mode, the diameter of each air hole 131 is 2cm, the center distance between any two adjacent air holes 131 in each row or each column is 20cm, a pipeline 14 which is communicated with the inside and the outside of the reaction tank 1 is arranged at the position corresponding to the lower part of the third plate 13, one side of the pipeline 14 far away from the reaction tank 1 is connected with a compressed air source 2, a rotor flowmeter 21 is connected in series in the middle of the pipeline 14, a plurality of air holes 131 are arranged on the side wall position of the reaction tank 1 corresponding to the first plate 11 and the second plate 12 (16 air holes 131 are arranged according to 4 x 4 in the embodiment), a plurality of strip-shaped air holes 15 are arranged on the side wall position of the reaction tank 1 corresponding to the inner side of the ultraviolet light tube 1, a plurality of strip-shaped lamp tube 1 is arranged at the position corresponding to the inner side of the strip-shaped lamp tube 1, and the strip-shaped lamp tube 1 is arranged at the top opening 15 is arranged at the position corresponding to the position of the inner side of the ultraviolet light opening 1, and the ultraviolet light opening 1 is arranged at the top of the strip-shaped lamp tube 1 is arranged at the position 1, and the strip-shaped top opening 1 is corresponding to the ultraviolet light opening 1 is arranged at the top opening position, and the ultraviolet light opening 1 is arranged at the top end is the position is corresponding side 15 position, and the ultraviolet light opening is arranged. The uv lamps 3 are connected in parallel with each other and are connected to an external power supply through a controller (the controller and circuit wiring are not shown in the figure).
The method for processing wheat grains by using the device for processing wheat grains by ultraviolet rays, which comprises the following steps:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept to be 320mJ/cm 2 through a controller, and the device is stable for 3min;
(2) Weighing 50kg of aflatoxin B1 and vomitoxin-exceeding wheat grains on an electronic scale, putting the wheat grains on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 10min of treatment, and measuring that the amount of the aflatoxin B1 in the wheat grains is 2.2 mug/kg, the removal rate is 92.3%, the vomitoxin content is 1090 mug/kg and the removal rate is 30.6%;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 3min;
(4) Putting the wheat grains treated in the step (2) on a second plate from a filling port, starting a pure oxygen compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 10 minutes of treatment, and measuring the content of aflatoxin B1 in the wheat grains to be 0.2 mug/kg, wherein the removal rate is 99.2%, the vomit toxin content is 230 mug/kg, and the removal rate is 85.4%.
The treatment result accords with mycotoxin limit in food safety national standard food (GB 2761-2011) of wheat flour for food: related standard with aflatoxin B1 limit index of 5 (mug/kg) and vomitoxin limit index of 1000 (mug/kg).
Embodiment two:
the apparatus for treating wheat grains with ultraviolet rays in this embodiment is the same as that in the first embodiment, and the method for treating wheat grains by the apparatus comprises the steps of:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept to be 320mJ/cm 2 through a controller, and the device is stable for 4min;
(2) Weighing 50kg of aflatoxin B1 and vomitoxin-exceeding wheat grains on an electronic scale, putting the wheat grains on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 15min of treatment, and determining that the amount of the aflatoxin B1 in the wheat grains is 1.6 mug/kg, the removal rate is 94.3%, the vomitoxin content is 1010 mug/kg and the removal rate is 35.7%;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 4min;
(4) And (3) putting the wheat grains treated in the step (2) on a second plate from a filling port, starting a pure oxygen compressed air source, keeping the wheat grains in a rolling state between the first plate and the second plate, taking out the wheat grains after 15min of treatment, and determining that aflatoxin B1 in the wheat grains is not detected, wherein the vomit toxin content is 170 mug/kg, and the removal rate is 89.2%.
The treatment result accords with mycotoxin limit in food safety national standard food (GB 2761-2011) of wheat flour for food: related standard with aflatoxin B1 limit index of 5 (mug/kg) and vomitoxin limit index of 1000 (mug/kg).
Embodiment III:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept at 320mJ/cm 2 through a controller, and the device is stable for 5min;
(2) Weighing 100kg of aflatoxin B1 and vomitoxin-exceeding wheat grains on an electronic scale, putting the wheat grains on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 12min of treatment, and determining that the amount of the aflatoxin B1 in the wheat grains is 3.5 mug/kg, the removal rate is 87.6%, the vomitoxin content is 1250 mug/kg and the removal rate is 20.4%;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 5min;
(4) Putting the wheat grains treated in the step (2) on a second plate from a filling port, starting a pure oxygen compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 10 minutes of treatment, and measuring the content of aflatoxin B1 in the wheat grains to be 0.2 mug/kg, wherein the removal rate is 99.2%, the vomit toxin content is 210 mug/kg, and the removal rate is 86.6%.
The treatment result accords with mycotoxin limit in food safety national standard food (GB 2761-2011) of wheat flour for food: related standard with aflatoxin B1 limit index of 5 (mug/kg) and vomitoxin limit index of 1000 (mug/kg).
Embodiment four:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept to be 320mJ/cm 2 through a controller, and the device is stable for 4min;
(2) Weighing 100kg of aflatoxin B1 and vomitoxin-exceeding wheat grains on an electronic scale, putting the 100kg of aflatoxin B1 and vomitoxin-exceeding wheat grains on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 15min of treatment, and determining that the amount of the aflatoxin B1 in the wheat grains is 2.7 mug/kg, the removal rate is 90.5%, the vomitoxin content is 1050 mug/kg and the removal rate is 33.1%;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 4min;
(4) Putting the wheat grains treated in the step (2) on a second plate from a filling port, starting a pure oxygen compressed air source to enable the wheat grains to keep a rolling state between the first plate and the second plate, taking out the wheat grains after 12 minutes of treatment, and determining that aflatoxin B1 in the wheat grains is not detected, wherein the vomit toxin content is 190 mug/kg, and the removal rate is 87.9%.
The treatment result accords with mycotoxin limit in food safety national standard food (GB 2761-2011) of wheat flour for food: related standard with aflatoxin B1 limit index of 5 (mug/kg) and vomitoxin limit index of 1000 (mug/kg).
The specific procedure for the determination of aflatoxin B1 and vomitoxin in the four examples above is as follows:
1. Determination of wheat Aflatoxin B1
① Extracting: pulverizing wheat grains, mixing, sieving with 60 mesh sieve, dividing wheat flour by using a quartering method, weighing 2.000g of sample into a 250mL Erlenmeyer flask, adding 80mL of acetonitrile-water mixed solution, mixing water and acetonitrile for 30min on a shaking table, filtering, and collecting the extract.
② Purifying: and transferring 8mL of the extracting solution into a glass tube of the purifying column, and slowly pushing the packing of the purifying column to obtain the purifying solution.
③ Derivatization and assay: taking 2mL of purified liquid into a brown bottle with a plug, blowing the purified liquid with nitrogen gas gently at a water bath of 6O ℃, adding 200 mu L of n-hexane and 100 mu LTFA derivative liquid, uniformly mixing for 30s, then, derivatizing the mixture in a drying box of 40 ℃ for 15min, evaporating the mixture at room temperature, dissolving the mixture in the step ① of acetonitrile and water, fixing the volume to 10mL, uniformly mixing for 30s, centrifuging the mixture for 1000r/min for 15min, and taking supernatant for later use. After the instrument is stable, 10 mu L of filtrate is taken for sample injection, 10 mu L of standard solution is simultaneously taken for qualitative analysis according to retention time, and the peak area of the sample is compared with the standard peak area, and the external standard method is used for quantitative analysis.
④ Aflatoxin B1 standard stock solution: accurately sucking aflatoxin B1 1mL with the concentration of 10 mug/mL into a volumetric flask with the volume of 10mL, adding acetonitrile (analytically pure) for dissolution, and diluting the scale, wherein the concentration of the solution is 1 mug/mL.
⑤ Aflatoxin B1 standard use solution: accurately transferring standard stock solution into a volumetric flask with volume of 1.00 mu L to 10mL, diluting with acetonitrile to scale, sealing, and storing at 4deg.C in dark place for 1 week.
⑥ Chromatographic conditions:
chromatographic column: c18 column, 4.6mm×50mm,5 μm. Mobile phase: methanol, acetonitrile and water mixed solution, wherein the volume ratio of the methanol to the acetonitrile to the water is 15:13:72, the flow rate is 1mL/min, and the excitation wavelength of the detector is as follows: 460nm.
2. Wheat vomitoxin assay-enzyme-linked immunosorbent assay:
① Pulverizing wheat grains, mixing, sieving with 20 mesh sieve, dividing wheat flour by quartering method, weighing 5.000g on electronic balance, oscillating with 50ml water for 15min, filtering with qualitative filter paper, and measuring filtrate with kit;
② ) Detecting parameter settings
And (3) detecting the sample on an enzyme-labeled instrument after the sample reacts by the ELISA kit, wherein the detection wavelength is 450nm.
The contaminated wheat grain used in the above example was measured for aflatoxin B1 content of 28.3. Mu.g/kg and vomit toxin content of 1570. Mu.g/kg.
Claims (1)
1. A method for processing a wheat grain by using ultraviolet rays, characterized by comprising:
The ultraviolet light parallel power supply device comprises a reaction tank which is vertically arranged and sealed up and down, wherein a first plate, a second plate and a third plate which are horizontally arranged and vertically spaced are arranged in the reaction tank, 60-mesh screen plates are adopted for the first plate and the second plate, a plurality of air holes penetrating through the third plate along the vertical direction are arranged on the third plate, the air holes are arranged in a determinant mode on the third plate, the diameter of each air hole is 2cm, the center distance between any two adjacent air holes in each row or each column is 20cm, a pipeline which is communicated with the inside and the outside of the reaction tank is arranged at the position corresponding to the lower part of the third plate on the side wall of the reaction tank, one side of the pipeline, which is far away from the reaction tank, is connected with a compressed air source, a cover body which is communicated with the inside and the outside of the reaction tank is arranged at the position corresponding to the filler opening on the side wall of the reaction tank, an exhaust port which is communicated with the inside and the outside of the reaction tank is arranged in parallel and a plurality of ultraviolet light parallel connection tubes which are connected with each other through an external power supply device;
the ultraviolet light tubes are strip-shaped and are all arranged at equal intervals along the width direction;
The method comprises the following steps:
(1) In the device for treating wheat grains by utilizing ultraviolet rays, an ultraviolet light tube with the wavelength of 254nm and a compressed air source are selected, and the average ultraviolet radiation light intensity is kept to be 320mJ/cm 2 through a controller, and the stability is kept for 3-5min;
(2) Putting wheat grains to be treated on a second plate from a filling port, then starting a compressed air source to enable the wheat grains to be kept in a rolling state between the first plate and the second plate, and taking out the wheat grains after 10-15min of treatment;
(3) Then, an ultraviolet light tube with 185nm wavelength and a pure oxygen compressed air source are replaced, and the average ultraviolet radiation light intensity is kept to be 150mJ/cm 2 through a controller, and the ultraviolet light is stabilized for 3-5min;
(4) And finally, putting the wheat grains treated by the first part on a second plate from a filling port, starting a pure oxygen compressed air source to keep the wheat grains in a rolling state between the first plate and the second plate, and taking out the wheat grains after 10-15min of treatment.
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| KR100523724B1 (en) * | 2005-03-07 | 2005-10-26 | 주식회사 진양플라텍 | Dry type complex sterilizer |
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