Microencapsulated fruit enzyme powder and preparation method thereof

Abstract

The invention discloses microencapsulated fruit enzyme powder and a preparation method thereof. The preparation method of the microencapsulated fruit enzyme powder comprises the following steps: fermenting fruit enzyme liquid by adopting a pure lactobacillus plantarum fermentation method, and performing centrifugal separation on the fermented fruit enzyme liquid so as to obtain liquid supernatantand bacterial sludge; carrying out first embedding by using the bacterial sludge as a core material and sodium alginate as a wall material; carrying out second embedding by using chitosan and sodium tripolyphosphate as wall materials so as to obtain lactobacillus plantarum micro-capsules; and then, uniformly mixing the lactobacillus plantarum micro-capsules with the liquid supernatant, adding a freeze-drying protectant, and carrying out freeze-drying so as to obtain the microencapsulated fruit enzyme powder of which viable count of lactobacillus plantarum is up to 2.9-5.3x10<10> CFU / g and antioxidant activity equivalent to VC is 0.357-0.385 mg / g. Moreover, embedding rate of the lactobacillus plantarum micro-capsules is 60% or above. In simulated gastric juice, survival rate of live bacteria in the lactobacillus plantarum micro-capsules is 52.12-90.9%; and release rate of the lactobacillus plantarum micro-capsule is 90% or above after 2 hours of artificial intestinal fluid treatment.

Description

technical field [0001] The invention relates to a microcapsule fruit enzyme powder and a preparation method thereof, belonging to the field of fruit enzymes. Background technique [0002] According to the definition of the China Biological Fermentation Industry Association, enzymes refer to fermented products with certain specific functions obtained by using fruits and vegetables or other animals and plants as raw materials, using natural or artificial inoculation of microbial fermentation processes, and then extracted. Enzymes not only preserve the original nutrients in the fermentation raw materials, such as polyphenols, flavonoids, anthocyanins, etc., but also produce some new bioactive components, such as organic acids, amino acids, etc., through the fermentation and metabolism of beneficial bacteria. Compared with before fermentation, the transformation of microorganisms makes these small molecular substances easier to be absorbed by the human body. In addition, the pro...

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Problems solved by technology

[0006] One of purpose of the present invention is to provide a kind of preparation method of microencapsulated fruit enzyme powder in order to solve the technical problem that the ferment activity in the prior art is not high, this preparation method at first adopts twice embedding method to Lactobacillus plantarum The suspension is embedded, and the obtained Lactobacillus plantarum microcapsules have an embedding rate of more than 60%, and then the obtained Lactobacillus plantarum microcapsules are fermented with the supernatant separated from the fruit fermentation broth and freeze-dried Mix and freeze-dry the ingredients to obtain microencapsulated fruit enzyme powder

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