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HERMETIC STORE OF RAW ROUGH RICE

密封的生糙米商店

基本信息

批准号：
61560274
负责人：
BEKKI Eiji
金额：
$ 1.28万
依托单位：
HIROSAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61560274/
关键词：
Hermetic Store of Raw Rough Rice Dry - Store Dehumidifying Drying Drying Rate Air Flow Rate Closed Circulated Air System Temporary Store エネルギー消費率ローテーション胴割れ被害粒結露連続乾燥間欠乾燥減湿乾燥

项目摘要

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).

在对生糙米进行初步的密封储藏试验以确定其暂时安全储藏时，由于厌氧真菌的发酵作用，其品质变化较大。作为一种改进措施，本研究采用了粮食降湿降温技术。1986 ~ 1988年，用贮粮箱、除湿器和空气管道相结合的装置进行了三年的试验。对粮层进行少量通风，使露水凝结在排气侧内壁表面，潮湿的粮食吸收后发霉，污染粮食，出现斑点。循环空气中O_2和CO_2的重量比与大气中相同，因此需要注意促进好氧真菌繁殖的露水。然后，通风方向由上向下改变，最后一年，将约500 kg的稻谷装入地面以上1 m的高度，并调节空气流速，使每100 kg稻谷约为0.025 m^3/s。干燥87.5h后，物料初始含水率由27.5%降至15%，平均干燥速率为0.12%h。除湿器产生的热量几乎都消耗在入口侧的顶部空间，上层的快速除湿和温度下降造成了特征性的结果。因此，为了避免裂缝，翻过来说“旋转”通常是必不可少的。减少1 kg水分所消耗的电力为0.992 kwh（3.573 MJ）。