1. The cause of odor in the cold storage: the so-called odor, that is, the cooking ingredients and food in the cold storage, under the influence of external factors, produce an abnormal odor through physical and chemical changes. For a long time, this odor adheres to Cold storage walls, ceilings, and equipment and tools. Odors are produced in cold storage. Generally speaking, there are several reasons: cold storage has an odor before it enters the food. Before entering the cold storage, there will be spoilage and deterioration, such as spoiled eggs, meat and fish. The cold storage where the fish is stored, the meat, eggs, fruits and vegetables are stored without washing, and the smell is infected and deteriorated. The cold storage is not well ventilated, and the temperature and humidity are too large, causing the mold to multiply and produce a mildew smell. The leakage of the cold storage refrigeration pipe, the refrigerant (ammonia) erodes into the food, causing odor. The temperature in the cold storage does not drop, causing the meat to deteriorate and produce spoilage. This happens mostly when fresh meat is not frozen, frozen, or transferred to the warehouse.
2, the method to prevent the occurrence of cold odors: foods that are refrigerated in cold storage must be inspected, and they can be placed in stock without deterioration. Cold storage warehouses must not have odors before they are purchased.
If there is any odor, it must be treated with technical means to eliminate the odor before use. It is usually necessary to strengthen the maintenance of the refrigeration equipment, and it is strictly forbidden to dump the unloading goods to prevent the pipeline from being damaged and the refrigerant to be leaked. During the cold processing of food, the cold storage warehouse must be kept at a certain temperature, and the frozen food should not be transferred or stored. If the temperature of the cold storage warehouse does not drop, you should find the reason and wait for the food processing. Do not mix and store foods that are infected with each other in the cold storage.
3, cold storage method to eliminate odor:
Ozone method: Ozone has a strong oxidation effect, which not only eliminates the odor of the cold storage warehouse, but also stops the growth of microorganisms. The use of an ozone generator can eliminate the odor of the warehouse. If the food containing more fat is stored in the cold storage, it is not suitable to use ozone treatment to avoid the oxidation of fat and the rancidity.
Formaldehyde method: The goods in the cold storage warehouse are carried out, and the 2% formaldehyde aqueous solution (ie formalin solution) is used for disinfection and odor elimination.
Vinegar method: a cold storage warehouse filled with fish, the fish smell is very heavy. It is not advisable to install other foods, and other foods must be loaded after cleaning and eliminating the fishy smell. The general method of removing the smell of fish is to use vinegar.