Effects Of Processing Parameters On Production Rate Of Freeze-Dried Colostrum

Freeze-drying of bovine colostrum has been investigated under the experimental design of orthogonal rotatable composite technique. The regressive models of production rate and drying time based on experimental data have been developed The interactions among chamber pressure, product thickness and solid concentration on production rate are presented by graphical analysis. The optimal parameters for high production rate are as follows: chamber pressure is 26.6Pa, product thickness is 14.5 mm and solid concentration is as high as possible in the range of present investigation.