Xiushui specialty red powder

Sweet potatoes have rich nutritional value and are widely used. They have a large planting area in my country.
However, fresh sweet potatoes have a high water content, which makes it difficult to store and preserve them for a long time, and the nutrient consumption is large during the storage process. Disease losses are serious.
Therefore, in order to extend the supply time of sweet potatoes, they must be dried. The experiment focuses on developing a kind of whole sweet potato powder to make it easy to store and extend the storage time.
This kind of whole sweet potato powder can be used as ingredients for steamed buns, Hanaki, bread, pastries, fillings, etc.
(1) Operating procedures
Choose three kinds of pulp colors of sweet potatoes as raw materials: purple pulp, orange pulp, and yellow pulp
(2) Process flow
Wash, peel and cut the raw material sweet potatoes. Silk flakes are color-protected, dried, crushed (moisture measured) and packaged
① Cleaning must be done, which is related to the final quality of the product.
②Peel: Use a bamboo knife to remove the outer skin of the sweet potato, especially the sunken part of the sweet potato skin.
③ Slice or shred the peeled sweet potatoes into potato chips or potato dices of a certain size using a vegetable slicer.
④ Soak the cut sweet potato slices or diced potatoes in a solution prepared with salt for a few minutes.
⑤ Dry with drying equipment to ensure the hygiene of the product, and pay attention to the temperature, which is generally between ~℃. The drying time can be determined according to the size of potato chips and potato shreds, so that the final moisture content is below.
⑥Crushing and packaging: Crush the dried sweet potato with a hammer crusher to make the sweet potato powder have a fineness of about a mesh.
(3) Results and Analysis
Among the three types of dried sweet potato flour, purple and orange sweet potato flour are superior in color, while yellow sweet potato has a darker color.
Therefore, purple and orange sweet potato varieties are selected as raw materials.
The sweet potato flour produced by the above method can be used as food raw material to make a variety of foods.
Such as sweet potato pancakes, sweet potato cakes, sweet potato flower rolls, sweet potato bread, etc., and can be made by steaming, boiling, or frying.