Pros and cons of traditional food sterilization methods
Sterilization is an important process for ensuring food safety in food processing. With the development of science and technology, sterilization methods and methods are increasingly diversified, and they are developing in the direction of safety, high efficiency, energy saving, and environmental protection. The traditional sterilization method is thermal sterilization. Because the heat transfer performance of food is generally poor, it takes a long time for the material center of the food to reach the sterilization temperature, which reduces the nutritional value of the food. In addition, the energy absorption caused by the heat capacity of the heating device itself causes energy loss. The consumption is high, and at the same time, the high temperature can easily cause cooking and canning taste, which limits the consumer's choice of high temperature food to a certain extent. Ozone water sterilization technology is a new sterilization technology that has emerged in recent years. Ozone water sterilization technology is not only suitable for foods with poor thermal conductivity and foods that are easily degraded due to heating, but also can be applied to vegetable juices such as plastic, glass and other packaging materials. Foods such as broth, cool drinks and coffee drinks can achieve sterilization in a short time, and prevent secondary pollution. Because it has many advantages that traditional sterilization methods such as thermal sterilization, ultra-high pressure sterilization and chemical sterilization do not have, it has been widely used in food, medical, chemical and other fields.
Second, the best sterilization method now
Ozone has a strong killing power against microorganisms such as bacteria, molds, and germs. It kills the virus by directly destroying its RNA and DNA substances; the process of killing bacteria and germs is that ozone first acts on thin wax, and then destroys the tissues of the wax until it lyses to death. High concentration ozone water sterilizes and leaves no residue. Air and water are used as raw materials, so the cost of sterilization is very low. After sterilization, it is decomposed into oxygen and water, so there is no residue in sterilization. Sterilization can be completed in 1-2 minutes.
At present, ozone water sterilization technology has been widely used in the meat industry, especially in developed countries and regions such as the United States, Japan, and Europe. It can be used in the production of meat industry. The sterilization products involve animal products, poultry and egg products, aquatic products and many other fields, and the process conditions are further optimized. Ozone water sterilization is not only fast and effective, but also can solve the sterilization problem of soft-packed meat products. Take pickled pepper claws as an example: Use ozone water to sterilize pickled pepper claws. After cutting the chicken claws, use the ozone water to soak the cut chicken claws, wash and sterilize them, and cook them at high temperature after cleaning. The chicken feet can be cooled, sterilized, and bleached with ozone water to extend the retention period of pickled chicken feet. Because there are many fungi contained in chicken feet, it is not easy to kill, and the requirements for the concentration of ozone water are also high. The minimum ozone water concentration for the sterilization of pickled chicken feet is 10mg / l, that is, more than 10ppm. It has an effect. The effect will be better when the ozone water concentration reaches 15-20ppm, which significantly prolongs the shelf life of the food, indicating that this technology can meet the needs of production.
Trends in future sterilization methods
In the future, more research is needed on the mechanism of ozone water sterilization, ozone water sterilization equipment, ozone water sterilization process parameters, the cold point of ozone water sterilization for packaging meat products, and expanding the scope of application of ozone water sterilization in the food industry. . We believe that with the continuous development of this technology, ozone water sterilization technology will be more widely used in the food industry, to provide people with more safe, high-quality, convenient food, and to meet the diverse and modern needs of people's diet and life URL of this article: http://tjbg022.com/show.asp?id=75