Vegetable juice drinks are products made from one or more fresh or refrigerated vegetables (including edible roots, stems, leaves, flowers, fruits, edible fungi, edible algae and ferns) that have been juiced, beaten or extracted. These include vegetable juice, mixed vegetable juice, mixed vegetable juice, fermented vegetable juice and other vegetable juice drinks.
Fruit and vegetable juice is known as "liquid fruit and vegetable", which better retains the nutritional components of fruit and vegetable raw materials. People's attention to health, the change of consumption consciousness, the consumption of drinks has gradually changed from hobby drinks to nutritional drinks, fruit and vegetable juice drinks to meet this requirement, the market is gradually expanding. At present, juice on the market mainly includes orange juice, apple juice, pineapple juice, grape juice, vegetable juice mainly includes tomato juice, carrot juice, pumpkin juice and some fruit and vegetable complex juice. In recent years, the fruit and vegetable juice processing industry of Chinese beverage processing manufacturers has had great development, a large number of foreign advanced fruit and vegetable juice processing production line, Tetra Pak production line, Kangmeihe production line, three-piece can production line, Aika bag production line, etc. Beverage processing manufacturers use some advanced processing technology, such as high temperature short-time sterilization technology, aseptic packaging technology, membrane separation technology, etc. The processing level of fruit and vegetable juice has been raised one level.
Vegetable juice is a vegetable juice product made by taking juice from different kinds of vegetable raw materials and mixing it in a certain proportion. Requirements of multi-dimensional compound vegetable juice products: ① Color allocation should be harmonious and unified; ② The product should have a pleasant aroma; (3) A variety of different vegetable juices are used to make the compound vegetable juice have a unique taste; ④ Nutrients complement each other, and can maintain good stability.
The taste of vegetable juice mainly depends on the flavor of vegetable juice and the ratio of sugar and acid, which can be roughly divided into light type and heavy type. Light vegetable juice can give people a refreshing feeling, is a good meal. In the preparation process, the combination and interaction of nutrient types should be considered, and inhibition and competition between nutrients should be avoided. At the same time, the order of addition and the coordination of multivitamins should be paid attention to.
The purification and clarification technology of beverage processing manufacturers is the key to produce clarified vegetable juice drinks. The vegetable raw materials still have a large number of cell fragments and starch, pectin, protein and other macromolecular substances after the extraction of juice through the 100 mesh sieve, which must be clarified. Natural clarification is slow and inefficient. Although the clarification effect of hot orange clearing method was ideal at that time, flocculent precipitation appeared after sterilization and storage of the product for a period of time, indicating that heat treatment was not complete to remove pectin and other macromolecular substances in cucumber juice, while chitosan method and pectinase method were ideal.
