Physical Separations

In food processing, some separations are good, and some may be bad. For example, milling of flour relies on separating wheat bran from white flour by screening to produce an important food. On the other hand, settling of pulp from fruit juice is usually undesirable.

Physical separations rely on some difference in size or in properties, such as density. Other separations, such as distillation, absorption, chromatography, and extraction may rely on differences in chemical or physicochemical propert…