Potato Starch (Solanum tuberosum)
Potato is an edible starch tuber. The plant, native to the Peruvian Andes, was probably first taken to Europe in the mid 16th century by Spanish explorers. The cultivation of the potato spread rapidly, especially in the temperate regions.
The potato plant grow up to 1m (3ft), with pointed leaves and white/purple flowers. The tubers form on the underground stem with some varieties producing up to 20 tubers. Potatoes grown for starch manufacture may contain up to 22% starch dry matter.
Fresh potatoes are carefully cleaned before starch extraction. The starch granules and juice are separated from the cell walls (the pulp) producing a starch milk. The starch milk is purified and dried to remove the water resulting in the starch granules.