Raisin processing technology

Abstract

The present invention belongs to the technical field of food processing, in particular to a raisin processing technology. The raisin processing technology consists of the following steps: choosing seedless fully mature grapes as raw materials, removing fruit granules with vertical diameter of less than 13 mm and damaged skins and rotting fruit granules after harvesting grapes, putting the grapes into sodium hydroxide solution with concentration of 1.5%-4.0% to soak for 1-5 seconds, putting the grapes into a baking dish to bake at a temperature of 35-40 DEG C for 4-5 hours, cold storing the baked grapes in a cold storage room at a temperature of 2-3 DEG C for 10-12 hours, repeating the baking and cold storing for 10-12 times, artificially air-drying the grapes treated in the above steps at a temperature of 10-15 DEG C for 30-35 days with artificial air-drying wind speed of 2 m / s and air-drying humidity of 25%-30%, stacking the air-dried grapes for 7-14 days to enable the grapes to be evenly dried, and finally removing fruit stems to obtain the raisins. The raisins prepared by the present invention have excellent quality, are semi-transparent, do not change color, taste sweet, fresh and mellow, and contain no other impurities.

Description

technical field

[0001] The invention belongs to the technical field of food processing, and in particular relates to a raisin processing technology. Background technique

[0002] Raisin is a high-grade nutritional product, which contains a lot of glucose, has a nutritional effect on the myocardium, and is helpful for the recovery of patients with coronary heart disease. Due to the high relative content of calcium, phosphorus, and iron, as well as a large amount of vitamins and amino acids, it is a good choice for the elderly, women and people with a healthy body. A good nourishing product for weak anemia patients. It can replenish qi and blood and warm the kidneys. It has a good curative effect on anemia and thrombocytopenia, and has a good nourishing effect on neurasthenia and excessive fatigue. Naturally air-dried raisins in the prior art often contain a large amount of Fruit pedicles, soil, sand and other impurities, and dried in a natural environment, will inevitably bre...

Examples

Embodiment Construction

[0012] A kind of raisin processing technology, it comprises the following steps,

[0013] a, select seedless white fully ripe grapes as raw materials;

[0014] b. After harvesting, remove the fruit with a longitudinal diameter less than 13mm, damaged skin and rot;

[0015] c. Immerse the grapes in a sodium hydroxide solution with a concentration of 1.5% to 4.0% for 1 to 5 seconds;

[0016] d. Put the grapes into a baking tray, bake them at 35-40°C for 4-5 hours, then refrigerate them in a refrigerator at 2-3°C for 10-12 hours, repeat this 10-12 times ;

[0017] e. Artificially air-dry the grapes treated in step d for 30-35 days at a temperature of 10-15° C., the artificial air-drying wind speed is 2 m / s, and the air-drying humidity is 25%-30%;

[0018] f. Stack the grapes for 7-14 days to make them dry evenly, and finally remove the stems.

technical field

[0001] The invention belongs to the technical field of food processing, and in particular relates to a raisin processing technology. Background technique

[0002] Raisin is a high-grade nutritional product, which contains a lot of glucose, has a nutritional effect on the myocardium, and is helpful for the recovery of patients with coronary heart disease. Due to the high relative content of calcium, phosphorus, and iron, as well as a large amount of vitamins and amino acids, it is a good choice for the elderly, women and people with a healthy body. A good nourishing product for weak anemia patients. It can replenish qi and blood and warm the kidneys. It has a good curative effect on anemia and thrombocytopenia, and has a good nourishing effect on neurasthenia and excessive fatigue. Naturally air-dried raisins in the prior art often contain a large amount of Fruit pedicles, soil, sand and other impurities, and dried in a natural environment, will inevitably bre...

Examples

Embodiment Construction

[0012] A kind of raisin processing technology, it comprises the following steps,

[0013] a, select seedless white fully ripe grapes as raw materials;

[0014] b. After harvesting, remove the fruit with a longitudinal diameter less than 13mm, damaged skin and rot;

[0015] c. Immerse the grapes in a sodium hydroxide solution with a concentration of 1.5% to 4.0% for 1 to 5 seconds;

[0016] d. Put the grapes into a baking tray, bake them at 35-40°C for 4-5 hours, then refrigerate them in a refrigerator at 2-3°C for 10-12 hours, repeat this 10-12 times ;

[0017] e. Artificially air-dry the grapes treated in step d for 30-35 days at a temperature of 10-15° C., the artificial air-drying wind speed is 2 m / s, and the air-drying humidity is 25%-30%;

[0018] f. Stack the grapes for 7-14 days to make them dry evenly, and finally remove the stems.