南极磷虾干燥特性的研究

南极磷虾资源量大且营养丰富,是人类赖以生存的后备蛋白库,如何高效利用其资源已经成为当今科技的重点和难点。通过陆上实验,设定温度在120℃的恒定干燥条件下,对其进行热风干燥,来模拟船载南极海域条件下,南极磷虾的干燥曲线和干燥速率曲线。结果显示,在恒定干燥条件下,其干燥速率是0.497g·cm~(-2)·min~(-1),临界含水率为0.56 g水·g干物料~(-1);恒定干燥时间约占全部时间的三分之一。当低于临界含水率时,物料就进入了降速干燥阶段。此外,南极磷虾的干燥速率还与干燥温度和物料的烘干表面积有关;提高干燥温度和表面积都可加快干燥速率,这对于南极磷虾粉的设备设计、实际生产都有着重要的参考和指导意义。

Study on drying characteristics of Antarctic krill

Antarctic krill is rich as a resource and rich in nutrients. It is considered the reserve protein bank for human survival. Therefore, the question of how to ensure efficient use of this resource has become a focus of current scientific and technological research. Both the drying curve and the drying rate curve of Antarctic krill were studied under the condition of a constant temperature of 120℃, and hot air drying was undertaken to simulate the conditions of the Antarctic sea area. The results showed that under constant drying conditions, the drying rate was 0.497 g·cm–2·min–1, the critical water content was 0.56, and constant drying time accounted for about 1/3 of the total time. When the moisture content was lower than a critical value, the material entered the drying stage. In addition, the drying rate of Antarctic krill was found related to both the drying temperature and the drying surface area of the material. The drying rate and the surface area of Antarctic krill are accelerated by an increased drying rate, which has important implications and significance regarding equipment design and the actual production of Antarctic krill as a food resource.