Production
The cassava plant has either red or green branches with blue spindles on them. The root of the green-branched variant requires treatment to remove linamarin a cyanogenic glycoside occurring naturally in the plant, otherwise it may be converted into cyanide. Konzo (also called mantakassa) is a paralytic disease associated with several weeks of almost exclusive consumption of insufficiently processed bitter cassava. The toxin found in the root of the red-branched variant is less harmful to humans than the green-branched variety. Therefore, the root of the red/purple-branched variant can be consumed directly.
Traditional community production of tapioca in northern Brazil is a by-product of manioc flour production, depending on manioc species. In this process, the manioc (after treatment to remove toxicity) is ground to a pulp with a small hand- or diesel-powered mill. This masa is then squeezed to dry it out. The wet masa is placed in a long woven tube called a tipiti, which resembles a giant Chinese finger trap. The top of the tube is secured while a large branch or lever is inserted into a loop at the bottom and used to stretch the entire implement vertically, squeezing a starch-rich liquid out through the weave and ends. This liquid is collected and the water allowed to evaporate, leaving behind a fine-grained tapioca powder similar in appearance to corn starch.
Commercially, the starch is processed into several forms: hot soluble powder or meal or pre-cooked fine or coarse flakes, rectangular sticks, and spherical "pearls" . Pearls are the most widely available shape; sizes range from about 1 mm to 8 mm in diameter, with 2–3 mm being the most common.
Flakes, sticks, and pearls must be soaked well before cooking, to rehydrate them; they will easily absorb water equal to twice their volume, becoming leathery and swollen. All these products traditionally are white, but sticks and pearls may be colored. The oldest and most common colour is brown, but pastel colors are now available. In all its forms, tapioca starch is opaque before cooking and becomes translucent when cooked.
Nigeria, Brazil, and Thailand are the world's largest producers of cassava. Thailand accounts for 60% of worldwide exports.
Read more about this topic: Tapioca
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