The mildew prevention of goods is particularly important in warehouse management. Today, the first-class warehouse will introduce the three core methods and main operation processes of mildew prevention of stored goods.
Three core methods
The core of mildew prevention of storage goods is to create conditions that are not conducive to the growth of microorganisms or to inhibit their growth. Specifically, it is to control natural conditions, chemicals and physical mildew prevention.
Control natural conditions
1, and control the commodity temperature outside the temperature range that is not conducive to microbial reproduction. For example, the refrigerator we use every day uses low temperature to inhibit the growth of microorganisms. Common are cold storage and cold chain transportation.
2. Humidity. Most microorganisms like a damp and dark environment. Dry humidity can directly affect the reproduction of microorganisms and achieve the purpose of control. Ventilation, drying, baking and dehumidifier can reduce the humidity of environment and goods.
3, oxygen, except for a few anaerobic bacteria, most moldy microorganisms need oxygen to survive. Vacuum pumping, filling with carbon dioxide and releasing deoxidizer can inhibit microbial reproduction.
4.pH value. Most molds and yeasts are suitable for growth in acidic environment with pH=4-6. Most bacteria are suitable for growth in pH=6-8. Acidic or alkaline substances that have no effect on the quality of goods are placed for mildew prevention and are mostly used in food.
Chemical mildew prevention
Chemical mildew-proof effect is good, cost is low, and it is widely used in production and operation. Here are some common mildewproof drugs.
1, carbendazim, with 0. 1%-0.3% concentration emulsion coated on leather, shoes, paper mildew. You can also bubble goods or spray the warehouse.
2. Salicylamine is insoluble in water and soluble in organic solvents. Spray or brush 0.2%-0.6% solution on leather and telecom equipment to prevent mildew.
3. Dioxyvinyl salicylamide, bactericide A-26, white powder, odorless, tasteless and non-irritating. Insoluble in water, 0.3-0.4% rubber suspension has obvious mildew-proof effect on leather.
4, chlorothalonil, tetrachloroisophthalonitrile, 0.2%-0.3% solution for leather mildew.
5. Dezincate, dilute 50% solution with water 1000 times, then soak the fruit, disinfect and prevent mildew.
6, deoxidizer, there are many kinds of chemical deoxidizers, with iron powder as the main component, the effect is better, no gram of iron can absorb 1 mg of oxygen. Deoxidizer is used in food, Chinese herbal medicine, electronic components, optical components, precision instruments and other commodities.
Physical mildew prevention
1, ultraviolet rays, sunlight contains a lot of ultraviolet rays, and grain, agricultural and sideline products, Chinese herbal medicines, cotton and linen products can be mildew-proof.
Ultraviolet light is installed in the warehouse for regular irradiation and environmental disinfection.
2. Microwave oven. Used in food, grain, leather, bamboo, cotton fabric, etc.
3, radiation, using the radiation released by radioisotopes to irradiate moldy items. Radiation destroys microbial DNA and inhibits microbial reproduction. Used in medical devices, daily necessities, food, leather, cigarettes, Chinese herbal medicines, etc.
Specific mildew-proof operation flow of storage items
Strengthen the acceptance of goods in storage: every batch of goods must be strictly accepted when entering storage. First of all, we should carefully check whether the goods are mildewed, and secondly, we should check whether the water content of the goods is too high, and whether the packaging is damaged and damp. If there is fever, it means that the goods have begun to mildew. Commodities that have begun to be moldy, have high water content or are packaged with damp, should be temporarily stored separately, and measures such as ventilation and drying should be taken in time to deal with them.
Choose a reasonable storage place. Moldy goods should be stored in dry and well-sealed warehouses. When palletizing, take moisture-proof measures to prevent the direct influence of ground tide on the goods: in rainy season, ventilate the goods to keep the surface of the goods in contact with flowing air to inhibit the growth of mold.
Insist on in-warehouse inspection: For the goods that are easy to mildew in storage, the in-warehouse inspection system should be strictly implemented, and signs of mildew should be observed and found at any time to avoid serious losses to the goods. Inspection should be based on the warehouse structure and building conditions, focusing on damp and high temperature places, and other places can be spot-checked and compared.
Strengthen the temperature and humidity management of the warehouse: Doing a good job in the temperature and humidity management of the warehouse is a means to limit the external causes of moldy goods. When microorganisms can not get the necessary conditions for growth and development, goods will not be moldy. Therefore, we should pay attention to control and adjust the temperature and humidity of the warehouse according to the different maintenance requirements of different commodities.
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