Preparation method for probiotics milk powder

A technology for probiotics and milk powder, applied in the field of food processing, can solve the problems of changing the original flavor of probiotics, inconvenient transportation and storage, etc., and achieve the effects of low equipment requirements, simple operation and high bacterial activity.

Inactive Publication Date: 2013-03-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a preparation method of probiotic milk powder, which solves the problem of low number of viable bacteria and short survival peri

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0029] Example 1

[0030] The preparation method of probiotic milk powder includes the following steps:

[0031] (1) Raw milk processing: the raw milk (cow milk) is sterilized at 135°C for 1 to 2 seconds at ultra-high temperature; then, it is concentrated under reduced pressure in a vacuum concentration tank, and the vacuum degree is maintained at 15.67×10 3 Pa, the temperature is maintained at 51°C, and concentrated milk is obtained after concentration.

[0032] (2) Bacterial cultivation: 3ml of probiotics (Streptococcus thermophilus) were inoculated into 300ml of fresh milk sterilized at 115°C for 10 minutes, and incubated at 37°C until curd.

[0033] (3) Centrifuge the obtained curd at 4°C and 6000r / min for 10 minutes to collect probiotic bacteria;

[0034] The obtained probiotic bacteria culture was added to concentrated milk in an amount of 4% by mass, and a protective agent was added to include leucine and vitamin B 12 The mass concentrations of glutamic acid and glutamic acid are...

Example Embodiment

[0037] Example 2

[0038] The preparation method of probiotic milk powder includes the following steps:

[0039] (1) Treatment of raw milk: the raw milk is subjected to ultra-high temperature instantaneous sterilization at 120°C for 1 to 2 seconds; then, it is immediately concentrated under reduced pressure in a vacuum concentration tank, and the vacuum degree is maintained at 16.00×10 3 Pa, the temperature is maintained at 53°C, and concentrated milk is obtained after concentration, with a milk solid content of 40-50%.

[0040] (2) Bacterial cell culture: first prepare an enrichment medium, dissolve 10g of whey powder, 5g of yeast extract, 25g of corn starch, and 180g of cucumber extract in 1000ml of distilled water, mix well, and sterilize at 115℃ Bacteria 20min;

[0041] Inoculate 10ml of probiotic strains (Streptococcus thermophilus and Lactobacillus bulgaricus, mixed in a volume ratio of 1:1) in the above-mentioned enrichment medium, and culture at 38°C for 32 hours. The somatic...

Example Embodiment

[0045] Example 3

[0046] The preparation method of probiotic milk powder includes the following steps:

[0047] (1) Treatment of raw milk: the raw milk is sterilized at 150°C for 1 to 2 seconds at ultra-high temperature; then, it is immediately concentrated under reduced pressure in a vacuum concentration tank, and the vacuum degree is maintained at 15.45×10 3 Pa, the temperature is maintained at 55°C, and concentrated milk is obtained after concentration, with a milk solid content of 40-50%.

[0048] (2) Bacterial cell culture: first prepare an enrichment medium, dissolve 10g of whey powder, 5g of yeast extract, 25g of corn starch, 100g of a mixture of white radish extract and carrot extract in 1000ml of distilled water, and mix well. , Sterilize at 115℃ for 20min;

[0049] Inoculate 10ml of probiotic strains (Lactobacillus bulgaricus) in the above-mentioned enrichment medium, culture at 37°C for 48h to obtain the bacterial culture solution, centrifuge the bacterial culture at 4°C, ...

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Abstract

The invention discloses a preparation method of probiotics milk powder. The preparation method comprises the following steps: 1), raw milk treatment: carrying out an ultra-temperature instant sterilization treatment to on the raw milk and then carrying out vacuum depression concentration to obtain concentrated milk; 2), bacteria cultivation: inoculating probiotics to sterilized fresh milk or enrichment medium to obtain a bacteria nutrient solution, wherein the volume of the inoculated probiotics is 1-3% of the volume of the bacteria nutrient solution; 3), homogenization: adding 1-10% of bacteria culture in percentage by weightmass fraction to the concentrated milk in the step 1) for homogenizing to obtain a concentrated milk mixture containing probiotics; and 4), spraying and drying the concentrated milk mixture containing the probiotics to obtain the milk powder containing probiotics. The preparation method disclosed by the invention has a simple operation process, low device requirements, saves cost and is suitable for large-scale production. The probiotics milk powder prepared from by the preparation method provided by the invention has all nutrition of common milk powder, and further has health benefits of various probiotics.

Description

technical field [0001] The invention belongs to the field of food processing, and in particular relates to a preparation method of probiotic milk powder. Background technique [0002] At present, the health effects of probiotics have been fully confirmed and recognized by consumers, and their new beneficial effects on the human body are constantly being revealed. Probiotics have the largest application share in dairy products, with a wide variety, mainly liquid dairy products such as probiotic yogurt and yogurt drinks, which are deeply loved by consumers. However, the viable bacteria in liquid dairy products have a short retention period. At 0°C to 8°C, yogurt can last for a week, and yogurt drinks can last for 1 to 3 months, and there are potential safety hazards during storage, transportation, sales, and drinking. Occurrence, leading to the health effects of probiotics can not really play. In order to prolong the preservation period of live bacteria, the main methods cur...

Claims

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Application Information

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IPC IPC(8): A23C9/12A23C9/16
Inventor 吕嘉枥刘洋
Owner SHAANXI UNIV OF SCI & TECH
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