Sweet Potato Drying
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Sweet Potato Drying
Sweet potatoes, also known as yams, groundnuts and sweet potatoes, are rich in protein, starch, pectin, fibre, amino acids, vitamins and many minerals, and have a reputation as a long-life food with effects such as protecting the heart, preventing emphysema, diabetes and weight loss. It has both longevity effects and good medicinal properties. Sweet potatoes have a large planting area throughout China, and the annual production is very considerable, and because it contains a large number of polysaccharides, mucus protein required by the human body, loved by people, but people often take sweet potatoes directly to the market trade, that is, not easy to transport also low prices, if the deep processing of sweet potatoes, the added value will be greatly improved.
The following use Aubert heat pump dryer to dry sweet potatoes, its operation steps are.
Firstly, the sweet potatoes are cleaned and then steamed. The sweet potatoes are taken out when they are about seven or eight years old and then sliced when they have cooled down. In the slicing process, the first thing is to keep the thickness consistent, basically around 2cm will be suitable, complete the above steps, you can put the sweet potato slices into the material tray, so that the thickness is uniform, placed neatly can be.
Heat pump dryer drying process.
1, the first stage, first open the heat pump dryer, to be drying room temperature reaches 30 degrees will be filled with sweet potato slices material cart pushed into the drying room, set the target temperature of 40 degrees, time for 2 hours.
2、In the second stage, the target temperature is set at 55 degrees and the drying time is set at 2 hours for continuous dehumidification.
3、In the third stage, the target temperature is raised to 65 degrees and the drying time is set for 2 hours for continuous dehumidification.
4, the fourth stage, the target temperature is set to 70 degrees, drying time is set for 2 hours, continuous dehumidification, the humidity of the final sweet potato slices is generally maintained at 18%, drying can be completed.
5、After stopping, let the sweet potato slices cool naturally.
Packaging into bags: take out the dried sweet potato slices for bagging, preferably for vacuum packaging, packaging can be stored in a cool environment, or refrigerated sweet potato slices can be.
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