Method for preparing guava fruit powder by vacuum freeze drying

Abstract

The invention provides a method for preparing guava fruit powder by vacuum freeze drying, comprising the following steps: (1) selection of raw material: selecting fresh guava fruits with 80-90% degree of ripeness, removing microbes and impurities attached to the skin of the guava fruits, and draining; (2) crushing: removing buttons and sepal, cutting the drained guava fruits into flakes with uniform sizes; (3) pulping: putting the cut guava flakes into a pulping machine, pulping slowly at first and then quickly until the fruit pulp is fine and uniform, filtering the guava fruit pulp with a sieve to remove guava seeds and impurities; (4) blending and mixing: adding a specified amount of a drying aid into the filtered fruit pulp, quickly stirring for uniformly mixing the fruit pulp with the drying aid; (5) drying: uniformly laying the uniformly mixed fruit pulp in a specified thickness in a culture dish, prefreezing at low temperature, drying by an automatic vacuum freeze drying device for preparing fruit pulp flakes; and (6) pulverizing: pulverizing the dried fruit pulp flakes into powder in a stirring machine, and then performing steam flow ultramicro-pulverization to improve the dissolution rates of nutrient substances in the guava fruit powder.

Description

technical field [0001] The invention relates to a method for preparing fruit powder. Specifically, the invention relates to a method for preparing guava fruit powder by vacuum freeze-drying, which belongs to the technical field of fruit powder processing. Background technique [0002] Guava, also known as guava, yaguo, and plucked fruit, is an evergreen small tree or shrub belonging to the Myrtaceae guava family. It is easy to cultivate and is a tropical fruit tree with strong adaptability. The origin of guava is tropical America, and it is widely distributed in tropical and subtropical regions. It has been planted in my country for many years. The main planting provinces are Taiwan, Hainan, Guangdong, Guangxi, Yunnan and other places. [0003] Guava meat is sweet and crisp, fresh and delicious, with a unique fruity taste and rich in various nutrients, so it is very popular among consumers. Guava is rich in vitamin A, vitamin B, vitamin C and trace elements calcium, phospho...

AI Technical Summary

Problems solved by technology

It is also reported that the hypoglycemic component of guava is crude guava extract. If guava juice is injected intraperitoneally into normal mice and alloxan-induced diabetic mice, the results show that guava juice can significantly reduce the blood sugar level of the mice. , but the hypoglycemic effect does not last for a long time; healthy volunteers and diabetic patients take guava juice orally, and it also has the effect of reducing blood sugar

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