The milk pasteurizing system is composed of plate pasteurizer, homogenize, degassed and centrifuge separator unit. It is also the core unit of the whole pasteurized milk processing line. The homogenize can decrease milk fat globule into small fat particles to
maintain the stability of the emulsion with 20-25 Mpa high pressure, and the degassed can remove the air in the milk to extend the shelf life of the milk. The pasteurizer is mainly removing the Pathogenic bacteria in milk and the centrifuge separator can remove the fat content in the milk to make into skimmed pasteurized milk and make milk standardized.
The milk pasteurization process is raw milk 4°C inlet, then use hot water or steam to preheat to 55°C, at this temperature, the milk can be separated fat into skimmed milk, then remove the air in the degassed, and then go to high-pressure homogenize, after this process finished, the milk will be heated to 72-85°C and holding for 10-15 seconds, then cooled to 4 °C outlet for filling.
This process can kill the pathogenic bacteria in cow milk that can cause the outbreak of human food-borne diseases, such as E.
coli, Bacillus, Listeria, etc., and it can also reduce the number of microorganisms that cause milk spoilage. The pasteurization process almost no damage to whey protein, immunoglobulin, vitamins, enzymes and other active substances. After pasteurization, the fresh milk can not only be stored for 5-7 days in a refrigerated environment at 2~6℃, but also retain a large number of active
nutrients, especially the natural and mellow taste of milk.
The milk pasteurizer can be made into three sections (milk heating, milk cooling and heat recovery) or four sections ( milk heating, milk homogenizing, milk cooling and heat recovery), The more sections, the higher the heat recovery efficiency, basically the milk plate pasteurizer heat recovery rate is more than 90%.