Pregledni rad
The causes of milk deposit formation on the walls of the heat exchangers during the heat treatment of milk
Bojan Matijević
; Veleučilište u Karlovcu, Odjel prehrambene tehnologije, Trg J.J. Strossmayera 9, 47000 Karlovac
Josip Čulig
Sažetak
The results of research on finding the causes and preventing the formation of milk deposit are described in this paper. During the heat treatment of milk, an unwanted phenomenon occurs; the formation of milk deposit on heating surfaces of heat exchangers. This phenomenon causes the decrease of heat transfer coefficient as well as the pressure drop, it restricts the flow of milk, and causes additional production costs and increases production loss. The formation of milk deposit is a result of complex processes caused by thermal treatment of proteins and mineral substances in milk. Factors which cause milk deposit are: pH-value, the amount of proteins and mineral substances in milk, dissolved gases in milk, characteristics of heating surface, the difference in temperatures of milk and heating surfaces, and the regime of milk circulation. The chemical composition of milk can not be influenced, but the standards of heat treatment in order to minimise this phenomenon can, and that is precisely the topic of the latest researches.
Ključne riječi
formation; milk deposit; heat exchangers; heat treatment
Hrčak ID:
480
URI
Datum izdavanja:
10.3.2006.
Posjeta: 2.682 *