1991 Fiscal Year Final Research Report Summary
Improvement of Drying Method on Rough Rice Quality
| Project/Area Number |
02660256
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業機械
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| Research Institution | Ehime University |
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Principal Investigator |
ABE Takemi Ehime Univ., Fac. of Agriculture, Professor, 農学部, 教授 (40036299)
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| Co-Investigator(Kenkyū-buntansha) |
HIKIDA Yoshio Ehime Univ., Fac. of Agriculture, Assistant, 農学部, 助手 (50127908)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Dryer / Computer Simulation / Rough Rice / Quality / Postharvest Technology / Germination / Tastemeter / Fatty Acid |
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| Research Abstract |
(1) The objectives of this study were to develop and evaluate an effective grain drier and drying technique for accelerating the drying of rough rice without any detrioration in quality of the dried grain and produce grains with high milling quality. A test drier was built that allow for independent control of the drying parameters and was used for the drying of newly harvested rough rice under different conditions. The effect of drying parameters on the quality of the dried grains were examined and the results presented.
Drying parameters affects the quality of dried grains. Drying air temperature range of 45ﾟC to 50ﾟC, grain air flow ratio ranging between 0.03m^3/min/kg to 0.05M^3/min/kg, exposure time ranging between 5min to 10min and tempering temperature of 25ﾟC is considered most appropriate for obtaining good quality and tasty rice. Grains must be dried promptly and fast after harvest, grain that took longer period to dry to a safe storage moisture content of 15% wet basis usually turn out to be of less quality and taste incorporating a cooling device in the tempering tank of continuous flow driers to keep the ambient temperature at 25ﾟC is recommended. Near infrared spectrometric method have been successfully used to evaluate the taste of rice grain. This new method of evaluating the taste of rice holds promise for automatic online evaluation of rice taste.
(2) Drying of grains to a safe moisture content level that would prevent spoilage or germination during storage is a first step in grain preservation, however this very important unit operation if not carried out properly could limit the value of sound grain for use as food or seed. We have Pexamined the effect of heating on the physiological functions of rough rice (respiration rate and germination ratio). The result of our investigation shows that heating affects respiration rate and germination ratio of rough rice to effect of temperature differ.
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