Processing technology for spray evaporation type fruit and vegetable juice concentrate

Abstract

A processing technology for spray evaporation type fruit and vegetable juice concentrate comprises the following steps: (1) enzyme deactivation; (2) juice squeezing; (3) rough filtration; (4) ultrafiltration through a ceramic membrane; (5) concentration: a spray dryer is used, fruit and vegetable clear juice is sprayed to vaporific fruit and vegetable liquid beads through a high-speed centrifugation mistorizer, meanwhile, hot air is introduced to a drying room to enable the vaporific fruit and vegetable liquid beads to be in contact with hot air and evaporated, vaporific fruit and vegetable liquid beads which are not completely evaporated collect together to become spray evaporation type fruit and vegetable juice concentrate to flow out from the bottom of the spray dryer, and waste gas is exhausted by a draught fan; (6) sterilization through a sterile filter membrane. The fruit and vegetable juice concentrate is clear and transparent in color and sweet and delicious in taste, maintains the original flavor and nutritional ingredients of fruits and vegetables better, and is free of precipitation and turbidity at the storage period.

Description

technical field [0001] The invention relates to the technical field of fruit and vegetable juice processing, in particular to a spray evaporation type fruit and vegetable concentrated juice processing technology. technical background [0002] Concentrated fruit and vegetable juice is made by squeezing fruits and vegetables out of juice and then evaporating part of the water by vacuum evaporation and concentration. Concentrated fruit and vegetable juices can be used as raw materials for beverages, and can also be diluted with water and drunk directly. However, there are still many problems in the processing of concentrated fruit and vegetable juices: (1) the clarification process is old, the clarification effect is poor, and the phenomenon of post-turbidity easily occurs during the transportation and storage of concentrated fruit and vegetable juices; method, due to the effect of high temperature and mist entrainment, it is easy to cause the loss of flavor substances and nut...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a spray evaporation type fruit and vegetable concentrated juice processing technology, which solves the problems of large loss of flavor substances and nutritional components in the production process of fruit and vegetable concentrated juice, browning in the process of processing and storage, and enzymatic hydrolysis of fruits and vegetables. Technical problems with juice spoilage