CN104264262A - Method for extracting araboxylan and protein fiber from wheat bran - Google Patents
Method for extracting araboxylan and protein fiber from wheat bran Download PDFInfo
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- CN104264262A CN104264262A CN201410439430.3A CN201410439430A CN104264262A CN 104264262 A CN104264262 A CN 104264262A CN 201410439430 A CN201410439430 A CN 201410439430A CN 104264262 A CN104264262 A CN 104264262A
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Abstract
The invention discloses a method for extracting araboxylan and protein fiber from wheat bran, and belongs to the food processing field. The extracting method mainly comprises the following steps: primarily grinding the wheat bran, pre-treating by using ethanol, centrifuging the obtained undissolved substances, primarily squeezing through a squeezer, superfine grinding, deactivating enzyme by using compound enzyme and gravity action, separating supernate from precipitation to obtain mixed liquor rich in araboxylan, concentrating the supernate, precipitating, concentrating and drying the organic solvent to obtain the product rich in araboxylan, vacuum drying precipitate to obtain a protein fiber product. The method disclosed by the invention can be used for extracting araboxylan with high additional value from food processing byproduct bran, the byproduct in the extracting process can be used animal feed, the additional value of the product is increased, and the economic benefit of food processing enterprise is improved.
Description
Technical field
The invention belongs to food processing technology field, be specifically related to a kind of method extracting araboxylan and protein fibre from wheat bran.
Background technology
Wheat is as the main raw material of human diet, the nutrition had mainly concentrates on the cortex of wheat, namely in wheat bran, therefore wheat bran is more and more subject to people's attention as the raw material of health food, China's wheat annual production is more than 100,000,000 tons, the wheat bran processed every year reaches more than 2,000 ten thousand tons, and wherein more than 85% all for brewageing and feedstuff industry, the rarely health food of wheat bran class.Containing abundant enzyme system, protein, carbohydrate, vitamin and mineral matter etc. in wheat bran, source is sufficient and cheap, if make full use of, will have significant economic benefit and social benefit.
Being rich in cellulose and hemicellulose in wheat bran skin, is the good source preparing compound sugar.Pentosan has the baking quality significantly acting on and have influence on bread to dough property, the pentosan in wheat is mainly present in wheat bran, the pentosan about containing about 20% in wheat bran.Therefore, be that pentosan prepared by raw material with wheat bran, and be developed as bread additives, there is good DEVELOPMENT PROSPECT.In addition, pentosan has the character such as high viscosity oxidative gelation, can also be applied to food service industry as thickener and humectant.
Araboxylan has good Bifidobacterium cultivation effect and low thermal performance and good surface-activity, and the araboxylan therefore prepared can be used as Growth Factors of Bifidus Bacteria and is applied in food.Reduce cholesterol, the production of inhibition cancer cell and activity, simultaneously, due to the low thermal performance that it has, belong to indigestibility sugar, can be used as the ideal sugar source of the patients such as diabetes, obesity, high fat of blood, the food of exploitation reduction postprandial blood sugar is a research whereabouts of araboxylan.
Summary of the invention
The object of this invention is to provide a kind of method that technique is simple, effect extracts araboxylan and protein fibre preferably from wheat bran.
For achieving the above object, the technical solution used in the present invention is, a kind of method extracting araboxylan and protein fibre from wheat bran, comprises the following steps:
(1) wheat bran is crushed to 30 ~ 50 orders, clean with alcohol flushing at 60 ~ 65 DEG C, centrifugally obtains solid, extracts, obtain pretreated wheat bran through squeezing machine;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 400 ~ 500 orders, adds water, water add 10 ~ 15 times that quality is wheat bran, stir into suspension;
(3) by suspension that step (2) is made, adjust ph is 4.0 ~ 7.0, suspension temperature maintains 30 ~ 60 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 1 ~ 10% of wheat bran quality, complex enzyme is made up of zytase and cellulase, mass ratio 1:2 ~ 5 of zytase and cellulase, stirs lower reaction and within 1 ~ 1.5 hour, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 80 ~ 100 DEG C, keeps 30 ~ 60min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 8 ~ 10h at 30 ~ 60 DEG C, is precipitated and supernatant;
(5) get 3/5 ~ 4/5 of supernatant in step (4), concentrated, thickening temperature 40 ~ 50 DEG C, makes the concentration of the solids in concentrated rear concentrate control 20% ~ 30%;
(6) add ethanol in the concentrate of step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is more than 65%, temperature controls at 5 ~ 15 DEG C, then centrifugation is precipitated thing, by sediment vacuumize at 50 ~ 60 DEG C, obtains araboxylan product;
(7) precipitation in step (4) obtains protein fibre through centrifugal, vacuumize.
The protein fibre that described step (7) obtains is through pneumatic conveying drying, and temperature controls at 80 ~ 100 DEG C, can obtain moisture azelon product below 14%.
In described step (1), the volume fraction of ethanol used is not less than 60%.
The volume fraction of described step (6) ethanol used is more than 90%.
The beneficial effect that the present invention produces is, the synergy of complex enzyme and gravity is adopted to be hydrolyzed to wheat bran, in Action of Gravity Field process, the complex enzyme of not destroyed active minute quantity resolves into the relatively low araboxylan of molecule to cellulose and macromolecular pentosan further; The moisture of product of the araboxylan that the present invention extracts below 10%, purity more than 50%, in protein fibre product moisture 10 ~ 14%, the content of protein fibre is 30 ~ 40%; Improve grain processing value-added content of product, add economic benefit.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited thereto.
Embodiment 1
As shown in Figure 1, a kind of method extracting araboxylan and protein fibre from wheat bran, comprise the following steps: (1) wheat bran is crushed to 30 orders, rinse with ethanol (volume fraction is 60%) at 60 DEG C, ethanol consumption hourly is 15 times of wheat bran volume, rinses 2.5h, centrifugally obtains solid, extract through squeezing machine, obtain pretreated wheat bran;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 400 ~ 500 orders, adds water, water add 10 times that quality is wheat bran quality, stir into suspension;
(3) by suspension prepared by step (2), adjust ph is 4.0, suspension temperature controls at 30 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 1% of wheat bran quality, complex enzyme is made up of zytase and cellulase, the mass ratio 1:2 of zytase and cellulase, stirs lower reaction and within 1 hour, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 80 DEG C, keeps 60min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 8h at 30 DEG C, is precipitated and supernatant;
(5) 3/5 of supernatant in step (4) is got, concentrated, thickening temperature 40 DEG C, the mass concentration of the solids after concentrated in concentrate is 20%;
(6) ethanol (volume fraction is 90%) is added in the concentrate to step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is 65%, temperature controls at 5 DEG C, then centrifugation is precipitated thing, by sediment in vacuumize at 50 DEG C, obtain araboxylan product;
(7) precipitation in step (4) through centrifugal, at 80 DEG C vacuumize obtain protein fibre product.
In the araboxylan product prepared in the present embodiment, the content of araboxylan is 50%, moisture 6%; Moisture 10% in protein fibre product, the content of protein fibre is 30%.
Embodiment 2
As shown in Figure 1, a kind of method extracting araboxylan and protein fibre from wheat bran, comprise the following steps: (1) wheat bran is crushed to 50 orders, rinse with ethanol (volume fraction is 70%) at 65 DEG C, ethanol consumption hourly is 20 times of wheat bran volume, rinses 2h, centrifugally obtains solid, extract through squeezing machine, obtain pretreated wheat bran;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 500 orders, adds water, water add 10 ~ 15 times that quality is wheat bran quality, stir into suspension;
(3) by suspension prepared by step (2), adjust ph is 7.0, suspension temperature maintains 60 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 10% of wheat bran quality, complex enzyme is made up of zytase and cellulase, the mass ratio 1:5 of zytase and cellulase, stirs lower reaction and within 1.5 hours, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 100 DEG C, keeps 30min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 10h under temperature 60 C, is precipitated and supernatant;
(5) 4/5 of supernatant in step (4) is got, concentrated, thickening temperature 50 DEG C, the mass concentration of the solids after concentrated in concentrate is 30%;
(6) ethanol (volume fraction is 95%) is added in the concentrate to step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is 70%, temperature controls at 15 DEG C, centrifugation is precipitated thing, by sediment in vacuumize at 60 DEG C, obtain araboxylan product;
(7) precipitation in step (4) through centrifugal, at 80 DEG C vacuumize obtain protein fibre product.
In the araboxylan product prepared in the present embodiment, the content of araboxylan is 60%, moisture 10%; Moisture 14% in protein fibre product, the content of protein fibre is 40%.
Embodiment 3
A kind of method extracting araboxylan and protein fibre from wheat bran, comprise the following steps: (1) wheat bran is crushed to 40 orders, rinse with ethanol (volume fraction is 80%) at 62 DEG C, ethanol consumption hourly is 18 times of wheat bran volume, rinse 2.2h, centrifugally obtain solid, extract through squeezing machine, obtain pretreated wheat bran raw material;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 450 orders, adds water, water add 12 times that quality is wheat bran quality, stir into suspension;
(3) by suspension prepared by step (2), adjust ph is 5.5, suspension temperature maintains 45 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 5% of wheat bran quality, complex enzyme is made up of zytase and cellulase, the mass ratio 1:3.5 of zytase and cellulase, stirs lower reaction and within 1.2 hours, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 90 DEG C, keeps 45min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 9h at 45 DEG C, is precipitated and supernatant;
(5) 70% of supernatant in step (4) is got, concentrated, thickening temperature 45 DEG C, the concentration of the solids after concentrated in concentrate is 25%;
(6) add absolute ethyl alcohol in the concentrate of step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is 75%, temperature controls at 10 DEG C, centrifugation is precipitated thing, by sediment vacuumize at 55 DEG C, obtains araboxylan product;
(7) precipitation in step (4) through centrifugal, at 80 DEG C vacuumize obtain protein fibre product.
In the araboxylan product prepared in the present embodiment, the content of araboxylan is 55%, moisture 8%; Moisture 12% in protein fibre product, the content of protein fibre is 35%.
Embodiment 4
As shown in Figure 1, a kind of method extracting araboxylan and protein fibre from wheat bran, comprise the following steps: (1) wheat bran is crushed to 45 orders, rinse with ethanol (volume fraction is 90%) at 63 DEG C, ethanol consumption hourly is 17 times of wheat bran volume, rinses 2.2h, centrifugally obtains solid, extract through squeezing machine, obtain pretreated wheat bran;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 420 orders, adds water, water add 13 times that quality is wheat bran quality, stir into suspension;
(3) by suspension prepared by step (2), adjust ph is 5.0, suspension temperature remains on 40 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 3% of wheat bran quality, complex enzyme is made up of zytase and cellulase, the mass ratio 1:4 of zytase and cellulase, stirs lower reaction and within 1.3 hours, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 90 DEG C, keeps 40min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 8h at temperature 40 DEG C, is precipitated and supernatant;
(5) 3/5 of supernatant in step (4) is got, concentrated, thickening temperature 42 DEG C, the concentration making the solids in concentrated rear concentrate is 20%;
(6) ethanol (volume fraction is 95%) is added in the concentrate to step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is 69%, temperature controls at 15 DEG C, centrifugation is precipitated thing, by sediment in vacuumize at 52 DEG C, obtain araboxylan product;
(7) precipitation in step (4) through centrifugal, at 90 DEG C vacuumize obtain protein fibre product.
In the araboxylan product prepared in the present embodiment, the content of araboxylan is 53%, moisture 7%; Moisture 11% in protein fibre product, the content of protein fibre is 33%.
Embodiment 5
As shown in Figure 1, a kind of method extracting araboxylan and protein fibre from wheat bran, comprises the following steps:
(1) wheat bran is crushed to 30 orders, and rinse with ethanol (volume fraction is 90%) at 65 DEG C, ethanol consumption hourly is 20 times of wheat bran volume, rinses 2.5h, centrifugally obtains solid, extract, obtain pretreated wheat bran through squeezing machine;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 400 orders, adds water, and the addition of water is 15 times of wheat bran quality, stirs into suspension;
(3) by suspension prepared by step (2), adjust ph is 6.0, suspension temperature maintains 50 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 8% of wheat bran quality, complex enzyme is made up of zytase and cellulase, the mass ratio 1:3 of zytase and cellulase, stirs lower reaction and within 1.5 hours, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 85 DEG C, keeps 30min, and then enzymolysis liquid is added settling tank, carry out gravitational settling, sedimentation 8h under temperature 60 C, is precipitated and supernatant;
(5) 4/5 of supernatant in step (4) is got, concentrated, thickening temperature 50 DEG C, the concentration of the solids after concentrated in concentrate is 30%;
(6) ethanol (volume fraction is 93%) is added in the concentrate to step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is 71%, temperature controls at 12 DEG C, centrifugation is precipitated thing, by sediment in vacuumize at 50 DEG C, obtain araboxylan product;
(7) precipitation in step (4) through centrifugal, at 100 DEG C vacuumize obtain protein fibre product.
The moisture 7% of the product of araboxylan prepared by the present embodiment, the content of araboxylan are 53%, in protein fibre product moisture 13%, the content of protein fibre is 33%.
Claims (3)
1. one kind is extracted the method for araboxylan and protein fibre from wheat bran, it is characterized in that, comprise the following steps: (1) wheat bran is crushed to 30 ~ 50 orders, clean with alcohol flushing at 60 ~ 65 DEG C, centrifugally obtain solid, extract through squeezing machine, obtain pretreated wheat bran;
(2) step (1) being processed the wheat bran obtained utilizes micronizer to be ground into 400 ~ 500 orders, adds water, and the quality that water adds is 10 ~ 15 times of wheat bran quality, stirs into suspension;
(3) by suspension that step (2) is made, adjust ph is 4.0 ~ 7.0, suspension temperature maintains 30 ~ 60 DEG C, complex enzyme is added in suspension, the addition of complex enzyme is 1 ~ 10% of wheat bran quality, complex enzyme is made up of zytase and cellulase, mass ratio 1:2 ~ 5 of zytase and cellulase, stirs lower reaction and within 1 ~ 1.5 hour, obtains enzymolysis liquid;
(4) enzymolysis liquid obtained in step (3) is heated to 80 ~ 100 DEG C, keeps 30 ~ 60min, and then enzymolysis liquid is joined settling tank, carry out gravitational settling, sedimentation 8 ~ 10h at 30 ~ 60 DEG C, is precipitated and supernatant;
(5) get 3/5 ~ 4/5 of supernatant in step (4), concentrated, thickening temperature 40 ~ 50 DEG C, makes the mass concentration of the solids in concentrated rear concentrate control 20% ~ 30%;
(6) add ethanol in the concentrate of step (5) gained, obtain mixed solution, in mixed solution, the mass fraction of ethanol is more than 65%, temperature controls at 5 ~ 15 DEG C, then centrifugation is precipitated thing, by sediment vacuumize at 50 ~ 60 DEG C, obtains araboxylan product;
(7) precipitation in step (4) obtains protein fibre product through centrifugal, vacuumize.
2. from wheat bran, extract the method for araboxylan and protein fibre as claimed in claim 1, it is characterized in that, in described step (1), the volume fraction of ethanol used is not less than 60%.
3. from wheat bran, extract the method for araboxylan and protein fibre as claimed in claim 1, it is characterized in that, the volume fraction of described step (6) ethanol used is more than 90%.
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Cited By (5)
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| CN104762681A (en) * | 2015-03-26 | 2015-07-08 | 中南林业科技大学 | Biological technology natural silk |
| CN106317260A (en) * | 2016-08-23 | 2017-01-11 | 上海交通大学 | Method for extraction from highland barley grain and purification of araboxylan |
| CN108191996A (en) * | 2018-02-28 | 2018-06-22 | 吉林农业大学 | A kind of preparation method of araboxylan |
| RU2680384C1 (en) * | 2017-12-12 | 2019-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кемеровский государственный сельскохозяйственный институт" | Method of obtaining dry extracts of medical plants for farm animals and poultry |
| CN114015104A (en) * | 2021-12-02 | 2022-02-08 | 南京农业大学 | Production technology of environment-friendly food packaging film with freezing acceleration function |
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| CN114015104A (en) * | 2021-12-02 | 2022-02-08 | 南京农业大学 | Production technology of environment-friendly food packaging film with freezing acceleration function |
| CN114015104B (en) * | 2021-12-02 | 2022-06-07 | 南京农业大学 | Production technology of environment-friendly food packaging film with freezing acceleration function |
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