Raisins have a long history in China and are well-known domestic and foreign famous products. Its advantage is that the weight is greatly reduced, the volume is significantly reduced, and it is easy to transport
It can be stored for a longer period of time. It is convenient to eat and nutritious. It is very popular with prospecting, navigation and tourists.
Process flow
Raw material selection → Washing → Drying → Packaging
Operation points
1, the raw material selection of dried grape fresh fruit, should choose high solids content, good flavor and color, enzyme browning is not serious, maturity is appropriate, thin fruit skin,
Meatless, non-nucleated varieties with sugar content above 20%.
2. Washing and decontamination is generally washed with 1.5-4.0% sodium hydroxide solution to wash away the waxy and harmful microorganisms attached to the skin and can be disinfected at the same time.
And make small cracks in the skin to facilitate evaporation and promote drying.
3, dry system points dry and artificial dry.
Naturally processed raw materials will be washed, put in the sun tray for 3-5 days, then flipped over, continue drying in the sun for 2-3 days, and then put the drying pan in the ventilation chamber.
Dry, about 30 days or so, the system color is bright green, good quality. Then store it back to soft for more than 3 weeks, threshing and removing the stem and packing it. The advantage of natural drying is the equipment
Simple, cost reduction, but limited by the weather, drying time is too long, easy to reduce product quality.
Artificial drying must have good heating and heat insulation, ventilation and water-discharging equipment, as well as good hygienic conditions, which can greatly shorten drying time.
Between, to ensure the quality of production. However, the cost is high and the operating technology is more complicated. At present, many domestic and foreign grape dry units gradually develop in the direction of artificial dryness.
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