Production technology of red date concentrated clear juice

Abstract

The invention relates to a production technology of red date concentrated clear juice, which comprises the following steps: impurity removal, fruit check and cleaning; breaking and rehydration; pulping and separation; enzymolysis; centrifugal separation; enzyme deactivation; high-temperature extraction; secondary centrifugal separation; cross flow filtration; vacuum low-temperature concentration; and sterile filling. The production technology provided by the invention has the advantages that with the red dates as the raw materials and by adopting a two-step breaking process, the breaking effect is improved, and the extraction rate of the raw materials is improved; by adopting the low-temperature rehydration process, the bright color, pure flavor and high content of nutritional ingredients of the date juice are guaranteed; by adopting the high-temperature extraction process, the physiologically-active substances in the red dates can be extracted to the greatest degree; since the high-temperature extracted juice returns to the rehydration section, the utilization rate of the raw materials is improved; and by adopting the cross flow filtration, the product has bright color and rich date aroma and is the best raw material for the deep processing of red dates. The production technology provided by the invention is reliable in the production technique of the domestic advanced level, fills up the blank of the key processing technology in domestic red date juice production, is a national initiative and meets the industrial production need.

Description

technical field [0001] The invention relates to a process for concentrating fruit juice, in particular to a production method for producing concentrated jujube juice with dried jujube as raw material. Background technique [0002] Jujube is a rare natural health fruit with both medicine and food, known as "Nutrition and Health Pill" and "Wood Grain". In addition to various rich nutrients, jujube fruit especially contains some special components with high physiological activity, such as polysaccharides, cyclic adenosine monophosphate, flavonoids, pentacyclic triterpenoids and alkaloids, etc. These functions The ingredients contribute to the unique health care function of jujube. Therefore, jujube not only has the effects of nourishing qi and nourishing kidney, nourishing blood and beauty, nourishing liver and lowering blood pressure, calming the nerves and strengthening yang, and treating fatigue and fatigue, but modern medical and food science research shows that jujube als...

AI Technical Summary

Problems solved by technology

[0003] Due to the high content of soluble substances and low water content of red dates after drying, and a variety of special functional components with physiological activity, the production process of red date concentrated clear juice is different from the traditional production method of fruit concentrated juice. At present, domestic production of red dates The juice is mainly divided into two categories according to the clarity of the final product: one is red jujube thick pulp, that is, turbid red jujube concentrated juice, which is relatively simple in production method, but the product has a low concentration of soluble solids (generally, the content of soluble solids is around 60 Brix) ), poor taste (scorched bitter taste), poor color (dark brown), which limit the jujube thick pulp as a raw material for the production of deep-processed products; the second is red jujube concentrated clear juice, that is, clarified red jujube concentrated juice, and its product has a high concentration of soluble solids , good taste and good color, but the current production of industrialized red jujube concentrated clear juice basically refers to the production process of apple concentrated clear juice. Value-added deep processing products

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