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Effects of Break‐Roll Speed Differential on Product Yield and Semolina Granulation in a Durum Pilot Mill System
Author(s) -
Hareland G. A.
Publication year - 1998
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1094/cchem.1998.75.6.836
Subject(s) - bran , yield (engineering) , granulation , chemistry , food science , agronomy , composite material , materials science , raw material , biology , organic chemistry
ABSTRACT Changes in break‐roll speed differential in a 25‐quintal (55‐cwt) durum pilot mill system (136 kg/hr feed rate capacity) affected total yield of semolina, flour, and bran; semolina yield from different purifiers; and semolina granulation (150‐ to 841‐μm particle size range). By adjusting the speed differential of the break and chunk roll pairs from 1.5:1 to 2.5:1 to 3.5:1, semolina yield increased significantly from 55 to 67 to 72%, respectively, and bran yield decreased significantly from 24 to 15 to 11%, respectively. Shorts yield was not affected by speed differential. At 1.5:1, semolina contained 9% flour, compared with 5% flour at 2.5:1 and 3.5:1.