Fruit and vegetable type beverage prepared through compound lactobacillus fermentation and preparing method thereof
A compound lactic acid bacteria and beverage technology, applied in the field of microorganisms, can solve the problems of monotonous species and insufficient processing depth, and achieve the effect of delicate tissue state
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Embodiment 1
[0036] Embodiment 1: technological process ( image 3 )
[0037] 1) Compound blending of fruit and vegetable juices: adjust the pH values of apple and yam juices to about 6.5 with sodium carbonate, mix the fruit and vegetable juices in proportion, add 3% sucrose, and set aside.
[0038] The preparation method of apple juice is as follows: fresh apples are peeled quickly after washing, cored, cut into 2cm-sized blocks, placed in 0.2% citric acid aqueous solution at 90-95°C for color protection for 5 minutes, taken out and added with 3 times cold water Quench in medium temperature, put it into a tissue masher and pulverize it, take it out, add 0.15% pectinase and treat it at 40-50°C for 3 hours, inactivate the enzyme (85°C, 3min), filter it with gauze, and put it in a high-pressure homogenizer after cooling to homogenize (20-50°C). 25MPa, 65~75℃) is apple juice ( figure 1 ).
[0039]The preparation method of yam juice is as follows: fresh yam is washed, peeled and cut into ...
Embodiment 2
[0049] Embodiment 2: the determination of compound lactic acid bacteria
[0050] Three strains with good performance in fermenting apple yam juice were screened from 37 strains of Lactobacillus by single factor experiment, and the optimal ratio of Lactobacillus fermentum, Lactobacillus helveticus and Lactobacillus acidophilus was determined by three-factor simplex center of gravity design method. 4:1:2.
Embodiment 3
[0051] Embodiment 3: the determination of the proportioning of apple juice and yam juice
[0052] Different ratios of apple and yam juice fermented substrates are different due to the content of ingredients, the content of acid after fermentation is different, and the color, aroma, etc. are also different. After 14 hours of fermentation at 37°C, the pH, titrated acidity and soluble solids after fermentation were analyzed, and the sensory evaluation was carried out, and the optimal ratio of apple juice to yam juice was determined to be 2:1.
[0053] Table 1 Physicochemical indicators and sensory evaluation of different ratios of compound fruit and vegetable juice fermentation liquid
[0054]
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