Pasteurization is a process applied to liquid foodstuff, for the purpose of removing pathogenic or harmful microorganisms. Pasteurization of liquid foodstuff is operated through the so-called heat exchangers. They can be of various types: with pipes, which make it possible to perform long work cycles; they are often used for large size plants. This exchanger type operates pasteurization processes for orange juice, lemon juice, i.e. the so-called “Newtonian juices” or “Newtonian fluids” having dynamic viscosity.

Plate exchangers are called as such, because they consist of overlapped metal plates, on which liquid to be treated flows on one side, and a fluid heated at requested temperature flows on the other side. Preferably, they are used in treatment plants of cremogenated fruit.

The pasteurization process is operated at a very high temperature, at around 102-103 degrees.