Abstract
In order to keep Japanese rice production, the improvement of quality and the reduction of production cost are the most important. In this research, the characteristics of brown rice drying, which would be effective for reducing cost in the postharvest stage, were obtained and the experiments for practical use were carried out. Brown rice drying is considered to be more reasonable than that of rough rice in effective use of heat energy and rise of volume efficiency. In this paper, the appropriate drying air temperature and relative humidity, initial moisture content of brown rice and tempering time were examined. As a standard condition of brown rice drying, drying air temperature is 30°C, relative humidity is 50%, and the time ratio of tempering to drying should be more than 3. The experimental results for practical use will be described in the next paper.
