Views:218 Author:Site Editor Publish Time: 2020-10-29 Origin:Site
In the past few years, food and water problems have continuously threatened our health. The food and water safety is a heated topic. It has also become one of the most concerned topics of ordinary people. Therefore, food and water disinfection has become a trend. Maybe you often hear about water disinfection by ozone water treatment, ozone water sterilizer, etc. So, how much do you know about disinfection method? This article mainly introduces the differences between pasteurization and ozone sterilization.
Pasteurization is a disinfection method invented in 1862 by the French biologist Louis Pasteur (Louis Pasteur). This method is mainly used in dairy industry to kill bacteria contained in milk.
Pasteurization is derived from Pasteur's efforts to solve the problem of beer sour. It is a disinfection method that uses a lower temperature to kill germs and keep the flavor unchanged. It is often used broadly to define heat treatment methods that need to kill various pathogens.
At present, there are two main pasteurization methods commonly used in the world: one is to heat the milk to 62-65°C and keep it for 30 minutes. This method is currently seldom used. It can kill various growth-type pathogenic bacteria in milk, and the sterilization efficiency can reach 97.3%-99.9%. After disinfection, only some thermophilic bacteria, heat-resistant bacteria and spores are left. The majority of bacteria are lactic acid bacteria, which are not only harmless to humans, but also good for health. The second method is to heat the milk to 75-90°C and keeps it for 15-16 seconds. The sterilization time is shorter and the work efficiency is higher. But the basic principle of sterilization is to kill pathogenic bacteria. If the temperature is too high, there will be more nutrient loss. It is should be noted that pasteurization does not kill tubercle bacilli.
Ozone destroys the structure of the microbial membrane with the oxidation of oxygen atoms to achieve sterilization. The ozone reacts with bacteria very quickly. Different from other bactericides, ozone can react with the double bond of lipids on the bacterial cell wall, penetrate into the bacteria, act on proteins and lipopolysaccharides, and change the cell’s permeability, which leads to the death of bacteria. Ozone also acts on nuclear substances in cells, such as purines and pyrimidines in nucleic acids, to destroy DNA. First, ozone acts on the cell membrane, causing damage to the constituent components of the membrane, leading to metabolic disorders. Then it continues to penetrate through the membrane, destroying lipoproteins and lipopolysaccharides in the membrane, changing the permeability of cells, and leading to cell lysis and death.
1) Pasteurization: Raise the temperature of the purified water to about 80 degrees, and circulate it in the purified water tank and the circulating pipeline for 1 hour to complete the sterilization.
2) Ozone disinfection: Add ozone to the purified water. Generally, when the concentration of ozone reaches 0.1-0. 2mg/L, the microbial biomass of the purified water pipe can be controlled below the national standard.
3) Compared with pasteurization, ozone disinfection is cheaper, consumes lower energy, and has lower requirements on equipment (such as boilers), and ozone is easier to obtain. The commonly used device to produce ozone is the ozone generator.
4) After the ozone disinfection is completed, all the water in the tank needs to be emptied, and then the system is turned on to refill the water.
Nicoler mainly produces all kinds of ozone water treatment equipment, including ozone water purifiers, ozone water filters, etc., and we also provide ozone water disinfectant, we hope to provide you with effective ozone water treatment method.