Flash drying of rough rice

Abstract

Investigations were conducted on moisture removal from high moisture freshly harvested rough rice under different flash-drying screen temperatures for different exposure periods. Other observations of effects on shelling, fissuring and germination of rough rice were made after grains were subjected to different flash-drying treatments. The results indicated that moisture removal from rough rice is dependent on exposure period, flash-drying screen temperature and initial moisture content. Exposure period had the greatest effect on moisture removal from rough rice. In general, moisture removal increased as flash-drying periods increased. Coefficient of shelling and coefficient of wholeness of kernels were significantly affected by the number of flash-drying passes to which the rice samples were subjected with or without tempering periods. The drying screen temperatures had a significant effect on the coefficient of shelling but not on the coefficient of wholeness of kernels. In contrast, initial moisture content contributed to the significant effect on coefficient of shelling. On the other hands, the flashing-drying periods did not contribute to either of the two. ...