The raw material of dried sweet potatoes is sweet potatoes in the form of strips or cubes, with orange-red color and sweet taste, which is a kind of healthy snack food. Traditional drying of sweet potato is by natural drying, which is the most economical way but time-consuming and easy to sour. Due to the influence of weather, it is often easy to destroy sweet potato nutrition and unique flavor. The traditional process requires a huge amount of manpower, and the processing quality and safety and hygiene are not effectively guaranteed. Professional drying technology development, many producers will now choose drying equipment for industrialized production, high efficiency, can not be affected by the weather.
The production of dried sweet potatoes starts with dehydration at high temperature. The moisture content of potato lumps is as high as 60-70%, which is a high-risk period of product rancidity, and it is necessary to make the surface dehydrate film quickly to prevent rapid proliferation of microorganisms; if the temperature is too high, the surface film is too thick, and it is difficult to evaporate the water. Therefore, temperature control is very important. Drying environment, sweet potato internal water evaporation, is also the high risk of potato souring period, ventilation and dehumidification is essential. And the process is inevitable heat dissipation, so the dryer is the ideal choice of equipment. After dewatering, the sweet potato cubes need to be imitated natural drying at 30-40°C. Then at 28-35°C, the sweet potato cubes will be dried naturally. And then in the environment of 28-35 ° C for back to the wet, back to the sugar, at this time the sweet potato blocks of moisture is 18-22%. Due to the sweet potato block at this time outside the dry inside the moisture, cooked paste after the starch paste with the evaporation of water, the dried shape gradually appear plump and moist; at the same time, the starch paste inside the potato block under the action of its own enzyme is converted into polysaccharides to increase the sweetness, so that the sweet potato dry more flavor, this time the humidity is maintained at 18%, the drying is complete. PARKOO dryer, drying process is simple and convenient, one key start, reduce labor intensity, save labor costs. The drying mode and temperature and humidity parameters can be set through the intelligent temperature and humidity control system, and the drying can be carried out in stages, effectively controlling the time and temperature of drying sweet potatoes, and the drying quality is more stable. Clean and environmentally friendly in the use of the process, will not cause environmental pollution, sweet potato drying health, in line with food safety standards, better improve the quality of dried sweet potato drying.
