STERILIZATION AND COOLING OF THE PRODUCT
In order to extend the preservation of treated products aseptic packaging, which consists in filling polifilm pre-sterilized bags with sterilized product at room temperature, is used. The product sterilization and cooling is obtained with tube in tube exchangers.
Composed of 4 or 2 concentric tubes, the exchangers include:
A product heating section with water overheated by a direct steam injection;
Up to the sterilization temperature, depending on the nature, pH, free water and previous treatments of the product;
A maintenance section at sterilization temperature and two cooling sections, the first generally cooled by tower water, and the second by refrigerated water or always by tower water.