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KMID : 0903519910340030258
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1991 Volume.34 No. 3 p.258 ~ p.261
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Studies on the suitable temperature for rice drying
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김영배/Kim, Y B
이병영/손종록/윤인화/Lee, B Y/Son, J R/Yoon, I H
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Abstract
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In order to establish the optimum drying temperature of the heated air blast-grain circulation dryer, a 2 ton scale of paddy was used in this experiment. The temperatures of heated air used were 45, 50, 55, 60, 65 and 70℃. Moisture content of the paddy was reduced to 15% from 24% by drying. The higher air temperature, the shorter drying time and the less fuel consumed. The portion of cracked kernels was found to be low as 3∼10% at 40∼55℃, but was very high to 28∼30% at 60∼70℃. The germination percent was very high as 98 and 93% at 40 and 45℃ but it was decreased to 86 and 30% at 50 and 70℃, respectively. The recovery yield of milled rice from paddy was decreased by 1.76, 2.63 and 7.52% at 60, 65 and 70℃respectively, compared with 75.86% as drying at 40℃. The higher heated air temperature, the less head rice of milled rice was recovered, and the decreased ratio was increased 60℃. The higher heated air temperature, the less alkali disintergation value and gel consistency of milled rice and the more water up take, expanded vlume, total solid in residual liquid and intensity of starch iodine blue value of residual liquid, and those tendency was found clear from 60℃ temperature of heated air.
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KEYWORD
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