HERMETIC STORE OF RAW ROUGH RICE

为了确保生糙米的临时安全储藏，在对生米进行密闭储藏初步试验时，由于厌氧真菌的发酵，导致稻米品质发生较大变化。作为一种改进措施，本研究采用了粮食降湿降温的方法。1986年至1988年，采用储粮罐、除湿器与空气管道相结合的装置进行了为期三年的试验。粮层的少量曝气使排气侧内壁表面的露水凝结，吸湿的粮食发霉，颗粒被斑点污染。循环空气中O2和CO2的重量比与大气中O2和CO2的重量比相同，因此需要注意促进好氧真菌增殖的露水。最后一年，将500公斤左右的糙米在离地1m的高度加料，调节风量，使其达到每百公斤粒约0.025m~(-3)/S。经过87.5小时后，27.5%的初始水分降至15%的水平，平均干燥速率为0.12%h，除湿器中产生的热量几乎消耗在进水口一侧的顶部空间，水分的快速减少和上层的降温取得了特征性的结果。因此，为了避免出现裂缝，翻转“旋转”的字样通常是必不可少的。每降低1公斤水分所消耗的电能为0.992千瓦时(3.573MJ)。

When having a preliminary test for hermetic store on purpose to make sure of temporary safe store for the raw rough rice, there was a worse change in quality because of fermentation caused by the anaerobic fungi. As an improvable means to it, moisture reduction and temperature fall of the grain were taken up in this study. The experiments were carried out using the apparatus combined a grain container and a dehumidifier with the air pipes for three years from 1986 through 1988.A small quantity of aeration to the grain layer condensed the dew on the surface of inside wall on the side of exhaust, the moist grain absorbed it got musty, and its grain was contaminated with spotted patterns. The weight proportion of O_2 and CO_2 in the circulating air was the same one as it in the atmosphere, so it needed to pay attention on the dew that made promote multiplication of the aerobic fungi. Then the direction- of aeration changed from up to down.At the final year, the rough rice of about 500 kg was charged in the height of 1 m above the floor, and an air flow rate was regulated so as to be about 0.025m^3/s per 100 kg grain. 27.5% of the initial moisture reduced to 15% level after 87.5 hours through, the mean drying rate was 0.12%h. The quantity of heat which enerated in the dehumidifier was almost consumed in a head space on the side of intake, rapid moisuture reduction and temperature fall in the upper layer made characteristic results. Turning over saying "Rotation" usually was, therefore, indispensable to avoid the crack. The electric power consumed for reducing 1 kg of moisture was 0.992 kwh (3.573MJ).