- 期刊
- OpenAccess
乾燥條件對稻穀碾米率之影響
Effect of Drying Conditions on Rice Head Yield
摘要
新收割之稻穀分成1.2kg為單位之樣本，在不同條件下予以乾燥。乾燥後之樣本予以脫殼，碾白，和選別，取得整粒米率。實驗分三組，乾燥條件包括：熱風溫度，乾燥／均化時間，通風量等，以模擬國內習用循環型稻穀乾燥機之設計和操作環境。 實驗所得之整粒米率自40.2%至71.6%不等。乾燥速率愈慢，所得之整粒米率愈高。惟當乾燥速率降至0.7%/hr附近時，整粒米率趨最高限；而乾燥速率升至1.4%/hr附近時，整粒米率可有5%之損失。 在本文之試驗條件下，熱風溫度和乾燥時間最影響乾燥速率；通風量在0.23CMM/kg以上對乾燥速率之邊際效用並不顯著。 摘自不同文獻之有關重要稻穀乾燥參數數據，併錄於本文。
並列摘要
Newly harvested rough rice lots were dried under different drying conditions. The dried grain lots were shelled, milled, and sorted for head yields. Three sets of experiment were made of different drying parameters-drying temperature, drying/tempering time, drying air flow rate-to simulate re-circulating rice dryers which are extensively used in Taiwan and other Asian countries. Head yields from 40.2% to 71.6% were observed. Head yield increased as drying rate decreased, but it approached high limit when drying rate dropped to around 0.7%/hr. And, when drying rate reached about 1.4%/hr, the head yield could drop to a low value -5% less the attainable high limit. Under the specified drying conditions of these experiments, the drying air temperature and drying time affected the head yield the most, while the marginal effect of the drying air flow rate over 0.23 CMM/kg was not significant. Some numerical data concerning major rice-drying parameters cited from difference literatures are presented.