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A method for preparing high maltose syrup from cadmium rice

A technology of high maltose syrup and rice, applied in the direction of fermentation and the like, can solve the problems of high cost, complicated operation steps, long process flow, etc., and achieve the effects of increasing added value, high cadmium removal rate, and simple and practical method.

Active Publication Date: 2019-10-18
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation steps of this method are too complicated. If it is used for the production of raw material starch of high maltose syrup or its by-product rice dregs protein, the process flow is too long and the cost is too high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Soaking and refining: Add 1500 g of citric acid-sodium citrate buffer solution with a concentration of 0.1 mol / L and a pH value of 5.0 to 500 g of cadmium rice (cadmium content of 0.391 mg / kg), soak for 2 hours at room temperature, and use Colloid grinding and refining, and filtering with 80 mesh filter screen, and then at a rate of 120r / min, continue to stir the filtrate for 1h to obtain rice slurry;

[0039] (2) Liquefaction: Add a citric acid-sodium citrate buffer solution with a concentration of 0.1mol / L and a pH value of 5.0 to the rice slurry obtained in step (1), adjust the Baume degree to 16°Bé, and add 4mL high temperature resistant α-amylase preparation (enzyme activity: 25,000 U / mL), stir evenly, react at 95°C until the DE value of the liquefied liquid reaches 12, filter to obtain rice dregs protein and liquefied liquid;

[0040] (3) Saccharification: Cool the liquefied liquid obtained in step (2) to 50°C, add 1.5 g of glucoamylase preparation (composed o...

Embodiment 2

[0045] (1) Soaking and refining: Add 2000 g of citric acid-sodium citrate buffer solution with a concentration of 0.1 mol / L and a pH value of 5.6 to 500 g of cadmium rice (cadmium content of 0.642 mg / kg), soak at room temperature for 2.5 hours, Adopt colloidal grinding and refining, and filter with a 100-mesh filter, and then continue to stir the filtrate at a rate of 160r / min for 1.5h to obtain rice slurry;

[0046] (2) Liquefaction: Add a citric acid-sodium citrate buffer solution with a concentration of 0.1mol / L and a pH value of 5.6 to the rice slurry obtained in step (1), adjust the Baume degree to 15°Bé, and then add 3mL high temperature resistant α-amylase (enzyme activity: 28000U / g), stir evenly, react at 98°C until the DE value of the liquefied liquid reaches 14, filter to obtain rice dregs protein and liquefied liquid;

[0047] (3) Saccharification: Cool the liquefied liquid obtained in step (2) to 55°C, add 2 g of glucoamylase (composed of β-amylase preparation, iso...

Embodiment 3

[0052] (1) Soaking and refining: Add 2500 g of citric acid-sodium citrate buffer solution with a concentration of 0.1 mol / L and a pH value of 6.0 to 500 g of cadmium rice (cadmium content of 0.794 mg / kg), soak for 3 hours at room temperature, and use Colloid grinding and refining, and filtering with a 100-mesh filter, and then at a rate of 200r / min, continue to stir the filtrate for 2h to obtain rice slurry;

[0053] (2) Liquefaction: Add a citric acid-sodium citrate buffer solution with a concentration of 0.1mol / L and a pH value of 6.0 to the rice slurry obtained in step (1), adjust the Baume degree to 14°Bé, and then add 2.5mL High-temperature α-amylase (enzyme activity: 30,000 U / g), stir evenly, react at 100°C until the DE value of the liquefied liquid reaches 16, filter to obtain rice dregs protein and liquefied liquid;

[0054] (3) Saccharification: Cool down the liquefied liquid obtained in step (2) to 60°C, add 2.5 g of glucoamylase (composed of β-amylase preparation, i...

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Abstract

A method for preparing high maltose syrup from cadmium rice, comprising the following steps: (1) soaking and refining: adding citric acid-sodium citrate buffer solution to cadmium rice, soaking, refining, filtering, and continuing to stir the filtrate to obtain rice Slurry; (2) Liquefaction: Add citric acid-sodium citrate buffer solution to the rice slurry, and add high-temperature-resistant α-amylase preparation, stir evenly, heat to react, filter, and obtain rice dregs protein and liquefaction liquid; (3) Saccharification: cool down the liquefied liquid, add glucoamylase preparation, stir evenly, keep warm and react to obtain the saccharified liquid; (4) Ion exchange: pass the saccharified liquid through secondary ion exchange to obtain a clear and transparent liquid; (5) Concentrate and dry: The clear and transparent liquid is evaporated and concentrated to obtain high maltose syrup. The method of the invention does not need to add a cadmium removal step, and the cadmium content of the obtained product is less than 0.03 mg / kg, and the maltose content is more than 75%. The method of the invention is simple, practical, safe and reliable.

Description

technical field [0001] The invention relates to a method for preparing high-maltose syrup, in particular to a method for preparing high-maltose syrup by using rice or broken rice with cadmium exceeding the standard as raw materials. Background technique [0002] According to a survey by the Ministry of Environmental Protection in 2013, the area of ​​cultivated land polluted by heavy metals in my country has reached more than 50 million hectares, and the amount of food polluted by heavy metals in the country is as high as 12 million tons every year, causing direct economic losses of more than 20 billion yuan. For example, Hunan, which enjoys the reputation of "China's granary", has 28,000 hectares of land polluted by heavy metals, accounting for 13% of the province's total area. After the cadmium rice incident occurred, the rice industry in the vast southern region suddenly encountered a "cold winter" in market sales, and it is imminent to systematically solve the problem of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/22C12P19/16C12P19/14
Inventor 林亲录吴伟吴晓娟徐友志肖华西吴跃梁盈
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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