Processing Equipment
Steam jacketed kettles with sweeping mixers are normally considered as low in shear; plate cookers as medium in shear; steam injection cookers, plate and flash coolers and milling equipment as high, and homogenizers as extremely high in shear. This is a general statement, and it is possible that a steam jacketed kettle may do as much damage to the starch granule over an
extended time as a homogenizer in short time. If it is necessary to homogenize a starch- containing food product such as a pudding, it is common practice to homogenize before the starch is cooked, as the suspended uncooked granules will pass through the homogenizer unharmed. (Fig. 20).
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