Abstract
Pellet feeds were prepared at 70, 80, 83 and 90°C under constant steam pressure of 4·0 kg/cm2. Under these conditions, the food received 10 seconds of heat treatment, but treatment at 90°C was found inappropriate since the food became slushy.
Pelleting conditions examined in this study did not eliminate all contaminating bacteria, but coliforms from ingredients were killed when pelleting was conducted at over 80°C. Concentrations of vitamins were not decreased during pelleting. The optimum temperature for pelleting food is considered to be 83°C under the conditions investigated in this study.