Exploring the white gold : excursions in starch

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After starch biosynthesis in the plant, the life cycle of industrially produced starch starts with the extraction of starch from the crop and its purification in the starch factory. It may then be modified with chemicals or enzymes or by some physical treatment in the same factory. The product is stored in bulk of bags and transported to a customer, who is most likely a food or paper manufacturer. Here the starch product is blended with water and other components, and processed into the final product, generally with the aid of heat and shear. It is here that starch exerts its function: providing energy, texture, taste and strength. In food applications, the final product may be processed again by the consumer by cooking or baking. Utilization of starch in the body cells of the consumer ultimately yields carbon dioxide and water. Paper and cardboard are generally recycled. The starch contained in these products ends up in a water purification system, where it is utilized by micro-organisms.

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