Method for improving safety and quality of red dates

Abstract

The invention discloses a method for improving the safety and quality of red dates. Cold plasma is used to pretreat the red dates, thereby reducing the hot air drying time of the red dates, improvingthe drying efficiency, reducing the drying energy consumption, and at the same time reducing the degradation of vitamin C, improving the antioxidant activity and reducing the generation of harmful product 5- hydroxymethyl furfural in the drying process. Therefore, the quality of the dried red dates is improved. The method mainly comprises the following steps to obtain the dried red dates: pretreating fresh red dates by using cold plasmas, and performing hot air drying treatment on the pretreated fresh red dates. The red dates are subjected to cold plasma pretreatment and then subjected to hotair drying. Compared with the method without pretreatment, the method of the invention can shorten the red date drying time and reduce the hot air drying energy consumption, and improve the safety andquality of the dried red dates. Compared with a chemical pretreatment method, the method has no problems of chemical residues and waste liquid treatment.

Description

Technical field[0001]The invention relates to the technical field of processing of agricultural products, in particular to a method for improving the safety and quality of red dates.Background technique[0002]Zizyphus jujube, also known as jujube, is a plant of the genus Rhamnaceae, which turns red when mature, and is often dried into dried dates. Red dates originated in China and have been cultivated in China for more than 8,000 years. They are rich in protein, fat, carbohydrates, carotene, B vitamins, vitamin C, vitamin P, calcium, phosphorus, iron and cyclic adenosine phosphate, etc. Nutritional ingredients, among which the content of vitamin C is among the best in fruits. According to the theory of traditional Chinese medicine, red dates have the functions of invigorating deficiency and qi, nourishing blood and calming nerves, invigorating the spleen and stomach. Red dates have good effects on chronic hepatitis, liver cirrhosis, anemia, allergic purpura and other diseases; red da...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems in the prior art that hot air drying efficiency is slow, the drying temperature is high, the nutritional value of dried red dates is damaged due to the special surface structure of red dates, and the chemical residues and raffinate caused by chemical pretreatment are difficult to handle, the present invention discloses A method to improve the safety quality of jujubes, using cold plasma pretreatment of fresh jujubes, the experimental results show that under the condition of proper selection of cold plasma operating conditions, cold plasma pretreatment can corrode the waxy layer on the surface of jujubes, forming Small cracks and holes, so as to improve the efficiency of water diffusion during the drying process of red dates, and further reduce the hot air drying time of red dates, improve drying efficiency, reduce drying energy consumption, and increase the content of biologically active components of red dates

At the same time, plasma has the advantages of green, environmental protection, high efficiency, and no pollution, and can solve the chemical residues and residual liquids caused by chemical pretreatment.

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