Research Information System
EUROFOODCHEM XVII, İstanbul, Turkey, 7 - 10 May 2013, pp.351
Dairy industry still uses heat in milk pasteurisation even if new methods have been developed such as high pressure application.Pasteurization is one of the basic processing of all dairy plants. Pasteurization can be done with heat application either by batch or continuous methods.
Batch pasteurization method is very difficult to control. In addition to pathogenic bacteria encountered in the laboratory analysis,transmission of a lot of infectious diseases were seen due to consumption of milk which considered to be pasteurized with batch method. In developed countries these cases have been recorded in chronological order. Here, it is said that continuous methods emerged from correction and conversion of disadvantageous aspects of batch method into advantageous.
It is required to be pasteurized the whole milk used in the production in dairy industry. Because plate heat exchangers are unique and unbeatable in terms of economy, efficacy and safety, they are used in continuous pasteutization method worldwide. Other than pasteurization, plate heat exchangers are frequently used in special heating and cooling processes. They are considered to be the most commonly used equipment in dairy industry.
Plate pasteurizers are formed by bringing together some parts such as pumps and plates. These parts are designed and mounted in different ways in different firms. These different structures can give rise to some risks during operation and may threaten the safety and composition of pasteurized milk.
Important points which we consider risk factors on plate pasteurizers from our factory tours in Turkey and work on literature is summarizedas follows: Materials used in plate pasteurizers such as pumps and plates in direct contact with the milk, the creation and control of pressure, gaskets, seals and connection systems used between plates, number of sections used for maintaining gradual heating, the properties of heating fluids, control systems of pasteurization and the design of holding section.
Plate pasteurizers are presently considered to be the most appropriate pasteurizing system in dairy industry. Our goal is not to make a comparison among pasteurizers operating in different methods, the main purpose is to asist in determining which plate pasteurizer will be chosen.