DENATURATION OF BETA-LACTOGLOBULIN AND NATIVE ENZYMES IN THE PLATE EXCHANGER AND HOLDING TUBE SECTION DURING CONTINUOUS-FLOW PASTEURIZATIONOF MILK

The denaturation of beta-lactoglobulin, alkaline phosphatase and lacto peroxidase and changes in the proteolytic activity, were studied at th e heating and holding sections of a plate heat-exchanger, during treat ment of milk under different conditions of temperature and flow rate. The heating rate contributed considerably to the heat-induced changes in the milk components during continuous flow pasteurization, whereas these indicators were less susceptible to differences in the holding t imes. Information gained in such studies on the denaturation effects o ccurring in the different sections could be useful in the design of he at exchangers and holding tubes. Copyright (C) 1996 Elsevier Science L td.