Decortication abrasive

FIGURE 7.13 Abrasive disc decorticator commonly used in sorghum- or millet-milling processes (courtesy of Intermech Engineering Ltd., Morogoro, Tanzania). 

What would happen to the chemical composition and yield of decorticated kernels of a high-tannin sorghum subjected to abrasive decortications to remove 25% of its weight Remember that most brown sorghums have a soft or floury endosperm texture. 

Kebaldle, M.M., Rooney, L.W., and Taylor, J.R.N. 2007. Effects of hand pounding, abrasive decortications-hammer mflling, roUer milling and sorghum type on sorghum meal extraction and quahty. Cereal Foods World 52(3) 129-137. 

Hardness is indirectly determined by subjecting samples to decortication with the tangential abrasive dehulling device (TADD) for a given amount of time. The higher the dry matter removed, the softer the grain. 

Sorghum is decorticated by abrasion using the laboratory TADD mill or the pilot plant IDRC mill. Decorticated kernels are usually air-aspirated and classified/sized. The yield of decorticated kernels, brokens, and by-products is calculated based on the original grain. 

Sorghum is usually decorticated to ranove the pericarp and part of the germ tissues aud then subjected to milling. The IDRC and TADD mills are good examples of laboratory equipment used for this purpose (Reichert 1982, Oomah and Reichert 1981). The IDRC mill is equipped with a set of abrasive disks that gradually abrades the pericarp and... 

Decortication Milling process consisting of selectively removing the bran or pericarp by abrasion. Brown rice and whole sorghnm are frequently decorticated before food preparation. 

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