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Method for efficient co-production of cyclodextrin and rice protein by rice processing by-products

A by-product, cyclodextrin technology, applied in the field of high-efficiency co-production of cyclodextrin and rice protein by rice processing by-products, can solve problems such as utilization rate of only 10%, waste, etc., to improve solubility, improve extraction rate, and improve substrates. The effect of conversion rate

Active Publication Date: 2020-01-21
无锡甜丰食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the annual output of rice bran in my country has reached 18 million tons, but the utilization rate is only 10%, and most of them are used as low-value feed, causing great waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Get rice processing by-product mixture (broken rice 1000g, rice bran 1000g) as processing raw material, specifically comprise the following steps:

[0026] (1) Mechanical activation: grind broken rice and rice bran into powder with a pulverizer, pass through a 70-mesh sieve, pour it into a ball mill and grind it at a low speed for 25 minutes at a speed of 100 rpm, then pour it into a multi-stage cyclone mill and grind it for 30 minutes to obtain Mechanically activated broken rice bran powder mixture;

[0027] (2) Ultrasound combined with low-concentration cellulase treatment: mix the mixture obtained in step (1) with water at a solid-to-liquid ratio of 1:7, and perform ultrasonic treatment with ultrasonic waves for 15 minutes, and the ultrasonic intensity is 2.3w / (g.cm2) , the treatment temperature is 35°C, after the ultrasonication is over, add cellulase with a final concentration of 0.1U / ml to the ultrasonic liquid to react for 30 minutes; ;

[0028] (3) Separation:...

Embodiment 2

[0036] Raw material is with embodiment 1, specifically comprises the following steps:

[0037] (1) Mechanical activation: Use a pulverizer to pulverize broken rice and rice bran into component powders, pass through a 70-mesh sieve, then pour into a ball mill for low-speed grinding for 20 minutes at a ball mill speed of 90 rpm, then pour into a multi-stage cyclone mill and grind for 25 minutes to obtain Mechanically activated broken rice bran powder mixture;

[0038] (2) Ultrasound combined with low-concentration cellulase treatment: mix the mixture obtained in step (1) with water at a solid-to-liquid ratio of 1:7, and perform ultrasonic treatment with ultrasonic waves for 18 minutes, and the ultrasonic intensity is 2.2w / (g.cm2) , the treatment temperature is 36°C, after the ultrasonication is over, add cellulase with a final concentration of 0.2U / ml to the ultrasonic solution to react for 25min; ;

[0039] (3) Separation: Centrifuge the broken rice bran slurry obtained in st...

Embodiment 3

[0047] Raw material is with embodiment 1, specifically comprises the following steps:

[0048] (1) Mechanical activation: use a pulverizer to pulverize broken rice and rice bran into component powders, pass through a 70-mesh sieve, pour into a ball mill and grind at a low speed for 15 minutes at a speed of 70 rpm, then pour into a multi-stage cyclone mill and grind for 20 minutes to obtain Mechanically activated broken rice bran powder mixture;

[0049] (2) Ultrasound combined with low-concentration cellulase treatment: mix the mixture obtained in step (1) with water at a material-to-liquid ratio of 1:8, and perform ultrasonic treatment with ultrasonic waves for a treatment time of 20 minutes and an ultrasonic intensity of 2.0w / (g.cm2) , the treatment temperature is 38°C, after the ultrasonication is over, add cellulase with a final concentration of 0.3u / ml to the ultrasonic solution to react for 20 minutes; ;

[0050] (3) Separation: Centrifuge the broken rice bran slurry o...

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PUM

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Abstract

The invention discloses a method for efficient co-production of cyclodextrin and rice protein through rice processing by-products. Broken rice and rice bran serve as raw materials. The method includes the steps that firstly, mechanical activation is conducted; secondly, ultrasonic waves are united with low-concentration cellulase for treatment; thirdly, separation is conducted, wherein broken rice and rice bran slurry obtained in the second step is subjected to centrifuging at the rate of 2500 r / min to 3200 r / min, and supernate and sediment are obtained; fourthly, broken rice and rice bran protein is extracted; fifthly, the broken rice and rice bran cyclodextrin is extracted, wherein the fifth step includes the sub-steps that A, debranching treatment is conducted; B, 4-alpha-glycosyl transferase and glucoamylase are modified; C, compound enzyme of the modified 4-alpha-glycosyl transferase and the modified glucoamylase is treated; and fourthly, a finished cyclodextrin product is obtained after freezing drying. According to the method, the high-quality broken rice and rice bran glucoamylase and high-quality rice protein by-products can be prepared, and the use value of the rice processing by-products is further improved.

Description

technical field [0001] The invention belongs to the technical field of food fine processing and sugar production, and in particular relates to a method for efficiently co-producing cyclodextrin and rice protein from rice processing by-products (broken rice and rice bran). Background technique [0002] Rice is the main food crop in my country, and 10-15% of broken rice will be produced in the milling process. At present, the broken rice produced by rice processing in my country is about 17 million tons every year. Due to the low hardness of broken rice and the easily soluble starch of broken rice , high degree of gelatinization, poor cooking characteristics, eating quality is far lower than the same variety of whole rice and other factors, it is rarely used directly for cooking rice. The main component of broken rice is starch, with a content as high as 70%-80%. The protein content and other nutrients are similar to those of rice, about 8%. Broken rice has good nutritional qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P21/06C12P19/20C12P19/18C12P19/16C12P19/04
CPCC12P19/04C12P19/16C12P19/18C12P19/20C12P21/06
Inventor 张法政
Owner 无锡甜丰食品有限公司
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