Banana powder is a health food made of fresh bananas processed by advanced technology and then ground into powder, pretreated, mixed, inspected and packaged according to a certain proportion. It has the functions of lowering blood pressure and helping digestion.
1. Raw material processing: Bananas that are fully ripened are required. Only bananas that have reached the edible maturity level will have a complete color and fragrance, and the degree of browning will be weakened. After peeling the bananas, the color protection treatment is required.
2. Color protection treatment: Bananas can be cut into slices and immersed in the solution of antioxidant and bleach immediately, or immersed in the above solution for 10-15 minutes without slicing. The bleaching agent is 0.2% sodium bisulfite, or available For sulfur fumigation, pure sulfur is burned in a volume of one cubic meter for 15 minutes. The sulfur needs about 10-15 grams, and the sulfur dioxide concentration is about 1%, which can achieve the purpose of color protection.
3. Drying: Drying at 60 °C, the drying time is very long at this temperature, and the loss of aromatic substances is too large. If conditions permit, use low-temperature vacuum freeze-drying equipment, put banana slices on a shallow tray, put them into a freezer, freeze at -28 ° C for 1 hour, and then in a low-temperature vacuum dryer, under 5-0.1 mm mercury Under the column vacuum, the drying temperature is 10-40℃, the banana moisture is sublimated, and the drying purpose is achieved in a short time, and the moisture content of the product is below 3%.
4. Grinding: Place it in the environment with dehumidification device and grind it into powder, and then sieve and finely grind to get the finished product of purple or light yellow banana powder.
5. Packaging: Because of low water content and easy moisture absorption, this product needs to be vacuumed or filled with nitrogen to seal the packaging, and requires low temperature and low humidity conditions during storage or circulation.
6. Edible method: when eating, directly add sterilized water to make a drink, or add it to other foods as a raw material of health food.
