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Study on the early detection of grain spoilage in the drying facility

干燥设备中谷物腐败变质早期检测的研究

基本信息

批准号：
08660312
负责人：
GOTO Kiyokazu
金额：
$ 1.41万
依托单位：
Gifu university
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660312/
关键词：
Cereal grain Grain drying facility Detection of spoilage Carbon dioxide Respiration Dew condensation 二酸化炭素濃度穀温

项目摘要

Recently, the accident of grain spoilage often occurs in the drying facility. In chapter 1, the spoilage was classified to chemical, physiological and biological aspects. It was found that the carbon dioxide concentration increases in every spoilage. So, there is a probability to detect the grain spoilage by analyzing the change of carbon dioxide concentration in the storage bin. In chapter 3, It was found that the higher the grain moisture content is, and the higher the storage temperature is, the more the increasing rate of the carbon dioxide concentration became in the bin. It was then judged that the grain spoilage can be detected by the measurement of change of carbon dioxide concentration, In chapter 4, the effect of the treatment condition after harvesting, for example grain moisture content, temperature, on the grain spoilage was surveyed. The indices of spoilage were the carbon dioxide concentration and grain's surface color. However, the correlation between them could not be found. In chapter 5, the detection of spoilage caused by dew condensation was considered using the model test. When 0.04 % of the stored grain was affected by dew condensation, the carbon dioxide concentration could be detected in the bin. In chapter 6, in the actual storage bin, the detection test was done setting the wet grain on the piled grain. The change of carbon dioxide concentration could be measured, and the sign of grain spoilage was recognized. However, the diffusion rate of carbon dioxide was low through the grain layr. In chapter 7, the effect of aeration from bottom to top was tested. That could make the diffusion rate high, so the detection of carbon dioxide in the actual storage bin became possible within short time.

近年来，烘干设备经常发生粮食腐败变质事故。第一章将腐败分为化学腐败、生理腐败和生物学腐败。结果发现，每次腐败时二氧化碳浓度都会增加。因此，通过分析储仓内二氧化碳浓度的变化，就有可能检测到粮食腐败变质。第三章发现，粮食含水量越高，储藏温度越高，仓内二氧化碳浓度增加幅度越大。由此判断，通过测量二氧化碳浓度的变化可以检测谷物的腐败情况。第四章考察了收获后的处理条件，如谷物含水量、温度等对谷物腐败的影响。腐败的指标是二氧化碳浓度和谷物表面颜色。然而，无法找到它们之间的相关性。在第五章中，考虑使用模型试验来检测结露引起的腐败。当0.04%的储粮受到结露影响时，即可检测到仓内二氧化碳浓度。第六章在实际储仓中，将湿粮放在堆放的粮食上进行检测试验。可以测量二氧化碳浓度的变化，识别谷物腐败的迹象。然而，二氧化碳通过颗粒层的扩散速率很低。第七章测试了自下而上的曝气效果。这样可以提高扩散速度，因此可以在短时间内检测到实际储存箱中的二氧化碳。