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Corn stalk nano-dietary fiber and method of preparing the same

A technology of corn stalks and dietary fiber, which is applied in the field of health food production, can solve the problems of unreported research on corn stalk dietary fiber, and achieve the effect of high content of soluble dietary fiber, high purity and good taste

Inactive Publication Date: 2009-04-08
孟繁宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on the preparation of corn stalk dietary fiber by microbial fermentation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The microbial strains used in this example are Trichoderma reesei and Aspergillus niger. The process steps are: washing corn stalks with water for 2 times to remove impurities, drying at a constant temperature of 60-80°C, pulverizing through a 60 mesh sieve, adding 2% skimmed milk powder and Mix with water evenly at a ratio of 1:4.5, adjust the pH value to 4.5, sterilize at 121°C for 30 minutes, cool, and inoculate Trichoderma reesei and Aspergillus niger seed solutions into the medium at the same time, and the inoculation amount is 3 % and 5%, at 28-35°C, 150r / min, mixed bacteria co-fermented for 6 days. After fermentation, the product is rinsed to neutral pH, pre-homogenized at 20-40Mpa, ultra-high pressure at 80-140Mpa, spray-dried, the inlet air temperature is 230°C, the outlet air temperature is 80-100°C, and the flow rate depends on the outlet air temperature. Made of corn stalk nanometer dietary fiber. The invention has simple preparation process, mild condition...

Embodiment 2

[0022] In this example, the agricultural by-product corn stalks were used, washed twice with water to remove impurities, dried at a constant temperature of 60°C, crushed through a 60-mesh sieve, added 2.5% skimmed milk powder and mixed with water at a ratio of 1:4.5, and adjusted to a pH of 6 , sterilized at 121° C. for 30 minutes, cooled, inoculated Trichoderma reesei seed liquid into the culture medium, the inoculum amount was 5%, and single-bacterial fermentation was carried out at 30° C. and 120 r / min for 5 days. The fermented product is rinsed to neutral pH, pre-homogenized at 20-40Mpa, ultra-high-pressured at 80-140Mpa, freeze-dried in a large freezer, and made into corn stalk nano-dietary fiber. The invention has simple preparation process, mild conditions, no pollution to the environment, and is easy to be industrialized. The dietary fiber tastes fine and smooth, has increased solubility, greatly improves water holding capacity, water absorption and swelling power, and ...

Embodiment 3

[0024] Wash the corn stalks twice with water to remove impurities, dry them at a constant temperature of 60°C, crush them through a 60-mesh sieve, add 2% skimmed milk powder and water and mix them evenly in a ratio of 1:4, adjust the pH value to 5.5, and put them under the condition of 121°C Sterilize for 30 minutes, cool down, inoculate the seed solution of Trichoderma konii into the medium, the inoculum amount is 5%, and cultivate it at 28-37°C for 2 days at 200r / min, then inoculate 7% of Aspergillus niger, under the same conditions Continue to culture for 4 days. After fermentation, the product is rinsed to neutral pH, pre-homogenized at 20-40Mpa, ultra-high pressure at 80-140Mpa, spray-dried, the inlet air temperature is 230°C, the outlet air temperature is 80-100°C, and the flow rate depends on the outlet air temperature. Made of corn stalk nanometer dietary fiber. The invention has the advantages of simple preparation process, mild conditions, no pollution to the enviro...

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Abstract

The invention provides corn straw nano dietary fiber and a preparation method thereof. The method adopts cellulase-producing bacteria for pure culture or mixed bacteria cofermentation to ferment corn straws, and carries out the ultra-high pressure homogenization treatment on the fermented corn straws to obtain the nano dietary fiber through spray drying or freeze drying. The corn straws are washed by water to remove impurities, dried, crushed and sieved, mixed evenly with skim milk powder or other substances and the water, sterilized and cooled; and a single-bacterium or multi-bacteria seed liquid of the cellulase-producing bacteria is inoculated into a culture medium for fermentation, a product after the fermentation is rinsed until the pH value is neutral, and the corn straw nano dietary fiber is prepared after homogenization treatment and spray drying or freeze drying. The method has simple preparation technology, mild conditions and no pollution to the environment, and is easy for industrialized production; and the dietary fiber has exquisite taste, increases the solubility, greatly improves water retention ability, water absorptivity and expansive power, and improves the content of soluble dietary fiber by more than 50 percent.

Description

technical field [0001] The invention provides a corn stalk nano-dietary fiber and discloses a preparation method thereof, which belongs to the technical field of health food production. Background technique [0002] Corn is the main food crop in Northeast my country. Corn stalks are an inevitable product of agricultural production. They not only contain a large amount of valuable energy and nitrogen resources, but also contain extremely high cellulose, hemicellulose and lignin, and have a wide range of raw materials and low prices. It has many advantages such as easy degradation and no pollution. However, at present, corn stalks are only used for returning fields, feed and industrial raw materials, and farmers’ living fuels. The utilization rate and added value are extremely low. New products of value are already a priority. [0003] As an important functional food base material, dietary fiber has attracted widespread attention and attention from nutritionists all over the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/105A23L1/28A23L1/29A23L1/308A23L33/21
Inventor 孟繁宇
Owner 孟繁宇
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