Irradiation technology of the hottest grain packag

Irradiation technology of grain packaging

1. Irradiation characteristics are very important for both agricultural producers and ordinary consumers. According to the statistics of the United Nations, tens of millions or even hundreds of millions of tons of food in the world are lost in storage every year due to the role of insects and bacteria, which brings great suffering and famine to mankind. The quality of agricultural products can be improved in the production process, but let's look at these formulas below, and it is more important to ensure and improve them in packaging and storage. Therefore, atomic technology was first applied in the field of agricultural products, which brought great benefits to human society and national economy

40 years ago, the Soviet Union, the United States, France and other countries began to study the treatment of various foods, including agricultural products, with ionizing rays, and developed packaging and storage processes. Practice has proved that the storage effect of ionizing radiation used in grain packaging is obvious; It is technically feasible, economically cost-effective, and of course, safe for people

studies have shown that y-rays are highly efficient in suppressing the life activities of bacteria, fungi and many microorganisms, and can preserve the original quality, flavor and nutritional value of food. Ionizing radiation is mainly used for the packaging and storage of the following agricultural products:

(1) potatoes and onions, which can inhibit germination and deterioration, and the irradiation dose is 200-1000gy

(2) packaged and stored grains, dried fruits, nuts and other foods can inhibit the life activities of pests in them, with a dose of 200-1000gy

(3) fresh keeping treatment of vegetables

(4) the preservative preservation of agricultural products (such as potatoes) can completely eliminate microorganisms by irradiating with a dose of more than 10kGy and combining with other methods such as heating treatment

2. Irradiation application and benefits

atomic technology can be used not only in the most lethal weapon - the atomic bomb, but also in the new materials developed by the team of Washington State University to serve mankind on the ground, such as building nuclear power plants, controlling pests, improving crop yields, etc. its use in food packaging is also an example of peace. In the United States, France, Canada, Japan, the Soviet Union and many other countries, some irradiated grain products have been approved by relevant institutions with overcurrent, overvoltage, overload and other protective devices for human consumption. The experience accumulated in using ionizing rays to prevent biological decay of agricultural products shows that in many cases, this new process can be transferred to large-scale industrial production

the practice of the Soviet Union shows that the labor cost of irradiating a ton of potatoes is 20% lower than spraying powdered preparations, and the labor productivity is increased by 1.5 times. If the quarterly production capacity of Y irradiation device is 25000 tons of potatoes, the investment cost can be compensated in 4 years, while the annual economic benefit is more than 120000 rubles, and the cost of irradiating 1 kg of potatoes is only 0.2 Gobi. In Italy, when the annual processing capacity of the factory is 30000 tons of potatoes, the irradiation treatment cost of these products is 2.5% of the product price

in Japan, the cost of irradiation treatment of potatoes in a factory with an annual production capacity of 21000 tons is 2.6% of the product cost. The Netherlands has successfully irradiated many agricultural products. When the production capacity was 20000 tons that year, it was beneficial to irradiate with a dose of 40 Gy. Economists believe that it is economically feasible when the processing cost of products is less than 10%

radiation process and equipment

before operation, agricultural products can be put into packaging boxes or containers before irradiation, which is very convenient, safe and reliable. For example, the Soviet Union irradiated potatoes in 90cm packaging boxes, with an average production capacity of 3 tons/hour, the radioactivity of the radiation source is about 1401010bq, and small cobalt-60 is the radiation source

look at the productive y irradiation device for irradiated potatoes in Canada. The radiation source is made into a hollow cylindrical shape. The device has no protective wall, which allows the radioactivity of the source to be increased to 2221014bq. Potatoes packed in 132106102cm packaging boxes are sent to the irradiation room along the roller conveyor through the tunnel population, and then sent to the device that moves relative to the source according to the specified procedure. In order to increase the utilization coefficient of rays and improve the uniformity of irradiation, the packaging box not only moves around the radiation source, but also moves along its own axis, so that all sides of the packaging box are exposed. The whole process is fully automated

irradiation process and equipment the Y irradiation device in Hokkaido, Japan is different from the above, and it is circular. Since 1973, the radiation source drill-60, with a radioactivity of 111104bq, the potatoes packed in a 100160130cm packaging box are sent to the special circular transmission device along the transmission device, and move relative to the radiation source along the circumference with a radius of 2.5m. After a given dose of irradiation treatment, The friction between the moving parts through the tunnel with the conveyor will increase the channel outlet and send it to the warehouse