When processing sweet potatoes, the extracted wet sweet potato starch needs to be dehydrated and dried, otherwise it is easy to breed bacteria in a humid environment, mold and deteriorate, and it is not easy to preserve. Therefore, in order to ensure the quality and long storage time of starch, it is necessary to dehydrate and dry the starch for preservation. The more common drying methods of sweet potato starch are outdoor natural drying and machine drying, and the efficiency and effect of the two drying methods are different.
First of all, outdoor natural drying is to use natural wind and sunshine to evaporate the water in the wet starch to achieve the purpose of drying. This week-long drying method is inexpensive and easy to operate, making it suitable for small-scale production or home-based processing. However, it is greatly affected by the weather, and it cannot be dried in rainy weather, and the drying time is long, and it is easy to be polluted by dust and insects. The drying method of drying starch outdoors is not suitable for large-scale starch production, but is suitable for small-scale production or home-based processing.
Dry starch outdoors
The automatic dryer is mainly an airflow dryer, which quickly removes the moisture in the wet starch by means of negative pressure drying. The drying speed is fast, the efficiency is high, it is not affected by the weather, the drying process is controllable, and the product quality is stable. Disadvantages: The initial investment cost is high and energy consumption is required. However, the price of this machine drying method is relatively high, which is suitable for some medium-sized and large-scale starch factories, and can improve the starch processing efficiency.
Airflow dryer
Which of these two starch drying methods is better? It goes without saying that the effect of using the machine to dry starch will be better, the airflow dryer can work continuously, the drying is uniform, the starch is not easy to gelatinize and agglomerate, and with a recovery device, it can ensure that the starch loss rate reaches the minimum. Compared with outdoor natural drying, machine drying not only improves the drying efficiency, but also ensures the quality of starch.
Starch airflow dryer
Users can choose the drying method according to their own processing needs and market positioning, small, limited capital investment users can choose outdoor drying, some large, starch quality requirements of the starch plant choose mechanized drying method for drying starch.