阅读说明：本技术 一种脱脂米糠的处理方法 (Method for processing defatted rice bran ) 是由 任洁 于 2018-09-11 设计创作，主要内容包括：本发明公开了脱脂米糠处理领域内的一种脱脂米糠的处理方法,包括以下步骤：(1)、将脱脂米糠加入弱碱进行超声处理；(2)、之后进行碱提处理得到碱提物；(3)、碱提物经过离心得到残渣和上清液；(4)、上清液进行酸沉得到酸沉物；(5)、酸沉物进行离心处理得到废液和离心物；(6)、离心物进行沉淀后得到蛋白粗品；将脱脂米糠加入弱碱进行超声处理；之后进行碱提处理得到碱提物；碱提物经过离心得到残渣和上清液；上清液进行酸沉得到酸沉物；酸沉物进行离心处理得到废液和离心物；离心物进行沉淀后得到蛋白粗品,可以对脱脂米糠进行充分的提取,使得脱脂米糠能够被充分利用,使得其巨大资源不会被浪费,提高了综合利用的水平,本发明可以用于脱脂米糠的处理。(The invention discloses a method for processing defatted rice bran, which belongs to the field of defatted rice bran processing and comprises the following steps: (1) adding weak base into the degreased rice bran to perform ultrasonic treatment; (2) then carrying out alkali extraction treatment to obtain an alkali extract; (3) centrifuging the alkali extract to obtain residue and supernatant; (4) performing acid precipitation on the supernatant to obtain an acid precipitate; (5) centrifuging the acid precipitate to obtain waste liquid and a centrifugate; (6) precipitating the centrifugate to obtain a crude protein product; adding weak base into defatted rice bran for ultrasonic treatment; then carrying out alkali extraction treatment to obtain an alkali extract; centrifuging the alkali extract to obtain residue and supernatant; performing acid precipitation on the supernatant to obtain an acid precipitate; centrifuging the acid precipitate to obtain waste liquid and a centrifugate; the protein crude product is obtained after the centrifugation is precipitated, the defatted rice bran can be fully extracted, so that the defatted rice bran can be fully utilized, huge resources of the defatted rice bran cannot be wasted, the comprehensive utilization level is improved, and the method can be used for treating the defatted rice bran.)

1. A method for processing defatted rice bran, which is characterized by comprising the following steps:

(1) adding weak base into the degreased rice bran to perform ultrasonic treatment;

(2) then carrying out alkali extraction treatment to obtain an alkali extract;

(3) centrifuging the alkali extract to obtain residue and supernatant;

(4) performing acid precipitation on the supernatant to obtain an acid precipitate;

(5) centrifuging the acid precipitate to obtain waste liquid and a centrifugate;

(6) and precipitating the centrifugate to obtain a crude protein product.

2. The method of processing defatted rice bran according to claim 1, wherein: and carrying out alkali extraction on the residues to obtain ferulic acid, carrying out centrifugal concentration on the treated matters to obtain water and ferulic acid crude extract, and adding microspheres into the ferulic acid crude extract to carry out biotransformation to obtain the 4-vinyl guaiacol.

3. The method of processing defatted rice bran according to claim 2, wherein: and mixing the waste liquid and the residues to perform alkali extraction of ferulic acid.

4. The method of processing defatted rice bran according to claim 3, wherein: the water is mixed with a weak base and sonicated with defatted rice bran.

5. The method of processing defatted rice bran according to claim 1, wherein: the microsphere is prepared from bacillus DLF-15161 and alginic acid.

6. The method of processing defatted rice bran according to claim 5, wherein: the microspheres separated by biotransformation can be recycled.

7. The method of processing defatted rice bran according to claim 1, wherein: the weak base is sodium hydroxide solution.

Technical Field

The invention relates to a method for treating defatted rice bran.

Background

A large amount of rice bran is produced in the rice processing process, while China is a large country for rice production, the rice yield accounts for about 30 percent of the global rice yield, 1.9 hundred million tons of rice are produced in the China in 2006, and about 1800 ten thousand tons of rice bran are produced at the same time. Therefore, the rice bran resources in China are very rich. The rice bran mainly contains 16-22% of lipid, 12-16% of crude protein, 8-12% of crude fiber and 7-10% of ash. In addition, the rice bran also contains various natural active substances, such as phytic acid, oryzanol, gamma-aminobutyric acid, lipopolysaccharide, tocopherol and the like, and the components have various functions of preventing cardiovascular diseases, preventing tumors, resisting fatigue and the like, so that the research on how to improve the comprehensive utilization level of the rice bran has important significance. The phytic acid is mainly widely existed in plants as calcium, magnesium and double salt (phenanthridine), wherein the highest content of rice bran is 6-9%. Phytic acid is widely used in the food industry as a stabilizer, an antioxidant, an ion remover, etc. because it has oxidation resistance and strong complexation with metal ions. From the utilization perspective, the phytic acid is salt in rice bran, and the existence of the phytic acid can increase the ash content of subsequent products, so that the comprehensive utilization of the rice bran is not facilitated; meanwhile, phytic acid is also one of anti-nutritional factors, and the nutritional value of the product is reduced. Although China is the main product of rice and the rice processing technology is very mature, the rice bran byproduct is mainly used as feed or other fermentation substrates, and the comprehensive utilization level is still low. At present, rice bran oil extracted from rice bran has become an important product in the market, and defatted rice bran is also used as feed or fermentation substrate, and the value thereof is not fully utilized, so that there is still a huge waste of resources.

Disclosure of Invention

The invention aims to provide a method for treating defatted rice bran, which can fully extract the defatted rice bran, fully utilize the defatted rice bran, avoid waste of huge resources and improve the comprehensive utilization level.

In order to achieve the aim, the invention provides a method for treating defatted rice bran, which comprises the following steps: (1) adding weak base into the degreased rice bran to perform ultrasonic treatment;

(2) then carrying out alkali extraction treatment to obtain an alkali extract;

(3) centrifuging the alkali extract to obtain residue and supernatant;

(4) performing acid precipitation on the supernatant to obtain an acid precipitate;

(5) centrifuging the acid precipitate to obtain waste liquid and a centrifugate;

(6) and precipitating the centrifugate to obtain a crude protein product.

Compared with the prior art, the method has the beneficial effects that the degreased rice bran is added with weak base for ultrasonic treatment; then carrying out alkali extraction treatment to obtain an alkali extract; centrifuging the alkali extract to obtain residue and supernatant; performing acid precipitation on the supernatant to obtain an acid precipitate; centrifuging the acid precipitate to obtain waste liquid and a centrifugate; the protein crude product is obtained after the centrifugation is precipitated, the defatted rice bran can be fully extracted, so that the defatted rice bran can be fully utilized, huge resources of the defatted rice bran cannot be wasted, the comprehensive utilization level is improved, and the method can be used for treating the defatted rice bran.

As a further improvement of the invention, the residue is treated by alkali extraction of ferulic acid, the treated product is centrifugally concentrated to obtain water and a ferulic acid crude extract, and the ferulic acid crude extract is added with microspheres for biotransformation to obtain 4-vinyl guaiacol, so that the utilization rate of the defatted rice bran can be further improved.

As a further improvement of the invention, the waste liquid and the residue are mixed for alkali extraction of ferulic acid, so that the waste liquid can be reused and the utilization rate can be improved.

As a further improvement of the invention, the water is mixed with weak base and is subjected to ultrasonic treatment together with the defatted rice bran, so that the water can be fully utilized, and the waste of resources is avoided.

As a further improvement of the invention, the microspheres are prepared from bacillus DLF-15161 and alginic acid, so that the biotransformation effect is better.

As a further improvement of the invention, the microspheres separated by biotransformation can be recycled, so that the microspheres can be recycled.

As a further improvement of the invention, the weak base is sodium hydroxide solution, so that the ultrasonic treatment effect is better.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

the method for processing defatted rice bran as shown in fig. 1 comprises the following steps: (1) adding weak base into the degreased rice bran to perform ultrasonic treatment; (2) then carrying out alkali extraction treatment to obtain an alkali extract; (3) centrifuging the alkali extract to obtain residue and supernatant; (4) performing acid precipitation on the supernatant to obtain an acid precipitate; (5) centrifuging the acid precipitate to obtain waste liquid and a centrifugate; (6) precipitating the centrifugate to obtain a crude protein product; carrying out alkali extraction ferulic acid treatment on the residues, carrying out centrifugal concentration on the treated substances to obtain water and ferulic acid crude extract, and adding microspheres into the ferulic acid crude extract to carry out biotransformation to obtain 4-vinyl guaiacol; mixing the waste liquid and the residue to carry out alkali extraction on ferulic acid; mixing the water with weak base and carrying out ultrasonic treatment on the mixture and defatted rice bran; the microspheres are prepared from bacillus DLF-15161 and alginic acid; the microspheres separated by biotransformation can be recycled; the weak base is sodium hydroxide solution.

When the ultrasonic rice bran processing device works, the degreased rice bran is added with weak base for ultrasonic processing; then carrying out alkali extraction treatment to obtain an alkali extract; centrifuging the alkali extract to obtain residue and supernatant; performing acid precipitation on the supernatant to obtain an acid precipitate; centrifuging the acid precipitate to obtain waste liquid and a centrifugate; the protein crude product is obtained after the centrifugation is precipitated, the defatted rice bran can be fully extracted, so that the defatted rice bran can be fully utilized, huge resources of the defatted rice bran cannot be wasted, the comprehensive utilization level is improved, and the method can be used for treating the defatted rice bran.

The present invention is not limited to the above embodiments, and based on the technical solutions of the present disclosure, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.