DAIRY PRODUCT AND PROCESS

摘要

PROBLEM TO BE SOLVED: To provide a simple process for preparing modified whey proteins at a high protein concentration, and/or to provide a method for producing a modified whey protein product at a high concentration without requiring a homogenizer or a scrape surface heat exchanger.SOLUTION: A method for preparing a dry modified whey protein concentrate (WPC) or whey protein isolate (WPI) comprises: (a) providing an aqueous solution of the WPC or WPI having a protein concentration of 15-50% (w/v), at a pH of 4.7-8.5; (b) heating the solution until its temperature exceeds 50°C for a time required for generating protein denaturation, the heat treatment comprising heating the solution under a turbulent flow condition; (c) directly conveying the heat-treated material to a drier at the end of the heat treatment; and (d) drying the heat-treated WPC or WPI. The heat-treated WPC or WPI is not subjected to a mechanical shear process before drying at a place other than where liquid is converted into droplets to facilitate drying.