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Method for removing heavy metal from rice protein through surfactant

A surfactant and composite surfactant technology, applied in the field of removing heavy metals from rice protein through surfactants, can solve the problems of strong acid corrosion resistance, low yield, affecting product taste, etc., and achieve the effect of reducing fat

Active Publication Date: 2017-08-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the following defects. First, under strong acidic conditions, the follow-up equipment required for the removal of heavy metals is highly demanding, and it needs to be resistant to strong acid corrosion
Secondly, the hydrolysis reaction of biological macromolecules under strong acidic conditions affects the quality of the final product and the yield is also low
In addition, after the acid reaction, it needs to be neutralized by a large amount of alkali, which will eventually affect the taste of the product

Method used

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  • Method for removing heavy metal from rice protein through surfactant
  • Method for removing heavy metal from rice protein through surfactant
  • Method for removing heavy metal from rice protein through surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of surfactant removes the method for heavy metal in rice protein, and this method comprises the steps:

[0029] (1) Pre-treatment of sugar-making rice dregs: use Japanese rice-made sugar rice dregs as the initial raw material, add 50°C hot water to adjust the slurry (the mass fraction of rice dregs dry powder is 20%), and add food-grade sodium hydroxide lye to adjust the pH of the slurry to 7.2, soak for 0.5h;

[0030] (2) Add composite surfactant (consumption is 0.05wt% of slurry) in the rice dregs slurry after swelling (consists of: sodium lauryl sulfate 50wt%, sucrose fatty acid ester 40wt%, sodium chloride 10wt%) , after high-strength pulverization treatment (the frequency of the pulverizer is 30Hz), the material passing through the pulverizer is screened, the fineness of the undersize reaches 80 mesh, and the oversize is returned to the mixing tank for pulverization, and the pulverized material is in the reaction tank 40°C heat preservation reaction for 3h;...

Embodiment 2

[0034] A kind of surfactant removes the method for heavy metal in rice protein, and this method comprises the steps:

[0035] (1) Pre-treatment of sugar-making rice dregs: take Yunnan rice-made sugar rice dregs as the initial raw material, add 70°C hot water to adjust the slurry (the mass fraction of rice dregs dry powder is 10%), and add food-grade sodium hydroxide lye to adjust the pH of the slurry to 7.5, soak for 1h;

[0036] (2) Add composite surfactant (consumption is 0.2wt% of slurry) in the rice dregs slurry after swelling (consists of: sodium lauryl sulfate 55wt%, sucrose fatty acid ester 40wt%, sodium chloride 5wt%) , after high-strength pulverization treatment (the frequency of the pulverizer is 45Hz), the material passing through the pulverizer is sieved, the fineness of the undersize reaches 90 mesh, and the oversize is returned to the mixing tank for further pulverization, and the pulverized material is in the reaction tank Inner 60°C heat preservation reaction ...

Embodiment 3

[0040] A kind of surfactant removes the method for heavy metal in rice protein, and this method comprises the steps:

[0041] (1) Pre-treatment of sugar-making rice dregs: using Hunan rice-made sugar rice dregs as the initial raw material, adding 80°C hot water to adjust the slurry (the mass fraction of rice dregs dry powder is 5%), and adding food-grade sodium hydroxide lye to adjust the pH of the slurry to 8.0, soak for 1.5h;

[0042] (2) Add composite surfactant (consumption is 0.5wt% of slurry) in the rice dregs slurry after swelling (consists of: sodium lauryl sulfate 60wt%, sucrose fatty acid ester 35wt%, sodium chloride 5wt%) , after high-strength crushing treatment (the frequency of the pulverizer is 60Hz), the material passing through the pulverizer is sieved, the fineness of the undersize reaches 100 mesh, and the oversize is returned to the mixing tank for further pulverization. After pulverization, the material is in the reaction tank Inner 70°C heat preservation ...

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Abstract

The invention discloses a method for removing heavy metal from rice protein through a surfactant. The method comprises the following steps of (1) pretreating sugar refining rice residues; (2) adding a composite surfactant; (3) performing plate-frame pressure filtration, performing subsequent drying treatment on plate-frame filter cakes to obtain finished products of protein powder, and collecting plate-frame filtrate so as to obtain production waste water; and (4) adding a composite flocculant to the waste water, performing horizontal spiral sedimentation centrifuging, performing activated carbon treatment on supernatant, and performing plate-frame filtration so as to obtain filtrate which can be used as reclaimed water in the production process to be recycled. According to the method disclosed by the invention, materials are treated through the composite surfactant under weak alkali condition, reaction conditions are mild, requirements for production equipment are not high, ordinary production equipment can meet the requirements, the production cost is low, the heavy metal removal effects are notable, and the popularization properties of the technique are improved.

Description

technical field [0001] The invention relates to the technical field of heavy metal treatment, in particular to a method for removing heavy metals in rice protein through a surfactant. Background technique [0002] Sugar rice dregs are the by-products of monosodium glutamate factories, glucose factories, wineries, maltodextrin factories, etc. that use rice as raw material after using rice starch. The main components of rice dregs are protein and carbohydrates. The protein content is very high, which is a good protein resource. However, most of these rice dregs are used for animal feed and have not been well developed, resulting in great waste. [0003] Generally, based on the protein content of 8% in rice, the heavy metals in the refined rice protein will generally be enriched to about 10 times the heavy metals in the raw rice. At present, the pollution of heavy metals in rice is still relatively serious in China, especially in Hunan, Jiangxi and other regions due to soil pr...

Claims

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Application Information

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IPC IPC(8): A23J1/12A23L5/20
CPCA23J1/12
Inventor 于秋生平向莉陈天祥陈林李珍妮冯伟朱熹
Owner JIANGNAN UNIV
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