NEWS
30
2023
-
03
Drying process for white nuts
Author:
Processing procedure of white nut:
Technological process
Ginkgo selection → peeling → drying → boiling → peeling → color protection → core-removing → secondary drying → grading → packaging
1.select,
Remove mildews, empty grains and sundries floating in water, and select ginkgo nuts with white and smooth surface, full grains and uniform size.
2.peeling
At present peeling machinery has been relatively popular. On the basis of water immersion or compost, mechanical separation and washing, instead of manual operation, not only reduce labor intensity, and greatly improve efficiency.
3.Drying
When ginkgo was placed in an oven at 70 ~ 75℃ for 15 ~ 19 hours, the ginkgo underwear film and flesh were easy to peel off after drying, containing about 35% ~ 38% moisture (with shell).
4.Boil,
Boil for about 8 minutes, pre-boil and spread out in time.
5.Shell
Crack ginkgo gently, shell does not go to the clothes, can also use the sheller shelled.
6.Strip
The peeled ginkgo nuts were put into 0.2% sodium hydroxide solution and heated at 80℃ for 3 minutes, stirring constantly. Remove ginkgo nuts after repeatedly rinsing with water to remove ginkgo nuts underwear.
7.To protect the color
Remove the ginkgo nuts with 0.2% citric acid or 1% salt solution to prevent Browning.
8.Go to the core
Not only does the ginkgo core contain hydrocyanic acid, it is also the source of the bitter taste of ginkgo.
.Secondary drying
Shelled, undressed and color-protected white nuts are placed in the air drying room at 60~65℃, and further dried for 3~5 hours until the water content is less than 12~18%.
10.Classification
Flesh whole grain, color yellow white, no peeling, split meat, spots, moth, stiffness, etc. There are two grades by size
11.Packaging
White nuts after drying, need to be packed into plastic bags as soon as possible, to prevent damp caused by mildew and deterioration, can not be timely divided into dry white nuts, to use a large plastic bag to pack up first, tie the bag mouth.
Dried nuts should be stored in a dry room.
White nut nutrition, health and body, the healthy middle-aged and old friends, is rare in health food supplements, contains rich nutrients, in addition to starch, protein, fat, sugar, also contains vitamin c, carotene, calcium, phosphorus, iron, potassium, magnesium and other trace elements, and ginkgolic acid polysaccharide, ginkgo phenol, five carbon composition such as fat and cholesterol. It has the function of food therapy and medical effect, such as good for lung qi, treatment of cough and asthma, stopping to bring insects, reducing constipation, smoothing and wrinkling, protecting blood vessels, increasing blood flow, etc.
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