CN112694515A - Deep processing method for extracting soybean protein peptide by membrane method - Google Patents
Deep processing method for extracting soybean protein peptide by membrane method Download PDFInfo
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Abstract
The invention belongs to the technical field of soybean deep processing, and discloses a deep processing method for extracting soybean protein peptide by a membrane method, which comprises the following steps: selecting soybean raw materials to be deeply processed; pretreating the selected soybean raw material to be deeply processed; extracting soybean embryo by membrane method to obtain soybean protein; preparing the isolated soy protein by using the protein solution; extracting soybean protein isolate by a membrane method to obtain soybean protein peptide, and purifying the soybean protein peptide. The method for extracting the soybean protein peptide by the membrane method can realize the full extraction of the soluble protein peptide in the bean dregs, the ultrafiltration membrane used for extraction has simple preparation method and no toxicity, the extraction is safer, and the obtained soluble protein peptide can be better applied. Meanwhile, the deep processing method for extracting the soybean protein peptide can realize the acquisition of the soluble protein peptide, and the intermediate product can be used for preparing other bean products, thereby reducing the waste.
Description
Technical Field
The invention belongs to the technical field of soybean deep processing, and particularly relates to a deep processing method for extracting soybean protein peptide by a membrane method.
Background
At present, soybeans are rich in high-quality proteins including eight amino acids necessary for the human body. At present, the soybean protein product produced by the traditional protein processing technology of the existing soybean protein processing enterprises in China has poor functionality such as gel property, emulsifying property, oil absorption property, water retention property, solubility, foamability, foam stability and the like, and cannot meet the requirements of food industry and high-grade food processing. However, in the prior art, an effective method for extracting the soluble protein peptide from the bean dregs is not available, and the soluble protein peptide cannot be fully extracted. Therefore, a new method for extracting soybean protein peptide and further processing is needed.
Through the above analysis, the problems and defects of the prior art are as follows: in the prior art, an effective method for extracting soluble protein peptides from bean dregs is unavailable, and the soluble protein peptides cannot be fully extracted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a deep processing method for extracting soybean protein peptide by a membrane method.
The invention is realized in such a way that a membrane method is used for extracting soybean protein peptide and further processing, and the membrane method is used for extracting soybean protein peptide and further processing and comprises the following steps:
step one, selecting soybean raw materials to be deeply processed: in the harvesting season of soybean, selecting clear weather to harvest soybean pods; selecting and picking pods which are full and have 3-4 soybeans, spreading the picked pods, airing the pods in the sun, stripping the pods, taking out the soybeans and collecting the soybeans; selecting soybeans with smooth and undamaged surface and uniform particle size as soybean raw materials to be deeply processed;
step two, preprocessing the selected soybean raw materials to be deeply processed: placing the selected soybean raw material for deep processing into water, wherein the soybean raw material is prepared by mixing the soybean raw material with the water according to the mass ratio of 1: 10, and soaking for 6-8 hours; after soaking, fishing out the soybeans, putting the soaked soybeans into a peeling machine for removing soybean hulls, and keeping soybean embryos;
step three, preparing hydrolysate by using sodium bicarbonate and absolute ethyl alcohol: weighing 1-3 parts of sodium bicarbonate and 6-8 parts of absolute ethyl alcohol according to the mass parts; placing absolute ethyl alcohol in a stirrer, and then adding sodium bicarbonate into the stirrer; setting the stirring temperature to be 22-26 ℃, and starting a stirrer to stir to obtain a sodium bicarbonate solution; performing ultrasonic dispersion on the sodium bicarbonate solution to obtain a hydrolysate after the ultrasonic treatment is finished;
step four, preparing an ultrafiltration membrane: dissolving dimethyl sulfoxide in a sodium hydroxide solution to obtain a dimethyl sulfoxide solution; adding poly (p-phenylene terephthalamide) nano-fibers into a dimethyl sulfoxide solution to obtain a mixed solution; adding 4, 4' -dichlorodiphenyl sulfone into the mixed solution, and uniformly stirring the casting solution; coating the membrane casting solution on the surface of a solid, solidifying, and taking down the solidified membrane to obtain an ultrafiltration membrane;
step five, extracting the soybean embryo by a membrane method to obtain soybean protein: crushing the soybean embryo in a crusher to obtain soybean fragments; mixing the soybean scraps with the hydrolysate, soaking for 10-12 h, filtering, removing solid substances and collecting an extracting solution; filtering the extracting solution by using an ultrafiltration membrane to obtain a whey solution and a protein solution;
step six, preparing the isolated soy protein by using the protein solution: collecting the filtered protein solution, and homogenizing the protein solution to obtain a treated protein solution; sterilizing the treated protein solution, and then concentrating in a concentrator to obtain protein slurry; spray drying the protein slurry to obtain soybean protein isolate;
step seven, extracting the soybean protein isolate by a membrane method to obtain soybean protein peptide: preparing protease hydrolysate, mixing the isolated soy protein with the protease hydrolysate, and hydrolyzing the isolated soy protein to obtain hydrolysate; filtering the hydrolysate with ultrafiltration membrane, and collecting the filtered substance to obtain soybean protein peptide;
step eight, purifying the soybean protein peptide: dissolving the collected soybean protein peptide in distilled water, and fully stirring until the solid substances are completely dissolved to obtain a soybean protein peptide solution; the soybean protein peptide solution is processed to obtain pure soybean protein peptide.
Further, in the step one, the harvesting season of the soybeans is 2-3 months after the flowering phase of the soybeans.
Further, in the step one, the pod picked up is placed under the sunshine for airing, and the method comprises the following steps: and (4) directly irradiating the pods with sunlight until the water content is less than 10%.
Further, in the third step, the conditions for performing ultrasonic dispersion on the sodium bicarbonate solution are as follows: setting the ultrasonic dispersion frequency to be 50-55 kHz and the ultrasonic dispersion time to be 2-5 min.
Further, in the fourth step, the conditions for coating the casting solution on the surface of the solid body for solidification are as follows: setting the solidification pressure to be 0.01-0.03 MPa, and setting the solidification temperature to be 40-50 ℃.
Further, in the fifth step, the soybean chips and the hydrolysate are mixed, and the mass ratio of the soybean chips to the hydrolysate is (1-2): (3-5).
Further, in the sixth step, the homogenizing the protein solution to obtain a treated protein solution includes:
(1) mixing a protein solution and distilled water according to a mass ratio of (1-3): (50-60), mixing, and uniformly stirring to obtain protein liquid;
(2) placing the protein liquid into a homogenizer for homogenization to obtain a protein dispersion liquid;
(3) and (3) placing the protein dispersion liquid into a homogenizer, and setting the homogenizing pressure to be 80-150 MPa for homogenizing treatment to obtain a treated protein solution.
Further, in the sixth step, the temperature of the spray drying is 80-100 ℃, and the drying time is 20-30 min.
Further, in step eight, the processing the soy protein peptide solution to obtain pure soy protein peptide comprises:
(1) putting the soy protein peptide solution into a drying oven;
(2) setting the drying temperature to be 30-40 ℃, and drying for 10-20 min for pre-drying;
(3) and after the pre-drying is finished, taking out the dried product, crushing the dried product, and grinding to obtain the pure soybean protein peptide.
Further, the conditions of the pre-drying are as follows: the pre-drying temperature is set to be 50-55 ℃, and the pre-drying time is set to be 20-50 min.
By combining all the technical schemes, the invention has the advantages and positive effects that: the method for extracting the soybean protein peptide by the membrane method can realize the full extraction of the soluble protein peptide in the bean dregs, the ultrafiltration membrane used for extraction has simple preparation method and no toxicity, the extraction is safer, and the obtained soluble protein peptide can be better applied. According to the invention, through selection and treatment of soybeans, the quality of the obtained soybean protein solution is improved, and the quality of the separated soluble protein peptide is better. The method can realize the acquisition of soluble protein peptide, and the intermediate product can be used for preparing other bean products, thereby reducing waste.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
FIG. 1 is a flow chart of a deep processing method for extracting soybean protein peptide by a membrane method provided by the embodiment of the invention.
Fig. 2 is a flow chart of a method for preparing hydrolysate by using sodium bicarbonate and absolute ethanol according to an embodiment of the present invention.
FIG. 3 is a flow chart of a method for preparing an ultrafiltration membrane according to an embodiment of the present invention.
FIG. 4 is a flowchart of a method for homogenizing a protein solution to obtain a treated protein solution according to an embodiment of the present invention.
FIG. 5 is a flow chart of a method for processing a soy protein peptide solution to obtain pure soy protein peptide according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a deep processing method for extracting soybean protein peptide by a membrane method, and the invention is described in detail with reference to the attached drawings.
As shown in fig. 1, the method for extracting soybean protein peptide by membrane method provided by the embodiment of the present invention comprises the following steps:
s101, selecting soybean raw materials to be deeply processed: in the harvesting season of soybean, selecting clear weather to harvest soybean pods; selecting and picking pods which are full and have 3-4 soybeans, spreading the picked pods, airing the pods in the sun, stripping the pods, taking out the soybeans and collecting the soybeans; selecting soybeans with smooth and undamaged surface and uniform particle size as soybean raw materials to be deeply processed;
s102, preprocessing the selected soybean raw materials to be deeply processed: placing the selected soybean raw material for deep processing into water, wherein the soybean raw material is prepared by mixing the soybean raw material with the water according to the mass ratio of 1: 10, and soaking for 6-8 hours; after soaking, fishing out the soybeans, putting the soaked soybeans into a peeling machine for removing soybean hulls, and keeping soybean embryos;
s103, extracting soybean embryos by a membrane method to obtain soybean protein: crushing the soybean embryo in a crusher to obtain soybean fragments; preparing a hydrolysate by using sodium bicarbonate and absolute ethyl alcohol, mixing the soybean scraps and the hydrolysate, soaking for 10-12 hours, filtering, removing solid substances and collecting an extracting solution; preparing an ultrafiltration membrane, namely filtering the extracting solution by using the ultrafiltration membrane to obtain a whey solution and a protein solution;
s104, preparing the isolated soy protein by using the protein solution: collecting the filtered protein solution, and homogenizing the protein solution to obtain a treated protein solution; sterilizing the treated protein solution, and then concentrating in a concentrator to obtain protein slurry; spray drying the protein slurry to obtain soybean protein isolate;
s105, extracting the isolated soy protein by a membrane method to obtain soy protein peptide: preparing protease hydrolysate, mixing the isolated soy protein with the protease hydrolysate, and hydrolyzing the isolated soy protein to obtain hydrolysate; filtering the hydrolysate with ultrafiltration membrane, and collecting the filtered substance to obtain soybean protein peptide;
s106, purifying the soybean protein peptide: dissolving the collected soybean protein peptide in distilled water, and fully stirring until the solid substances are completely dissolved to obtain a soybean protein peptide solution; the soybean protein peptide solution is processed to obtain pure soybean protein peptide.
In the step S101 provided by the embodiment of the invention, the harvesting season of the soybeans is 2-3 months after the flowering phase of the soybeans.
In step S101 provided by the embodiment of the present invention, the drying the picked pod in the sun includes: and (4) directly irradiating the pods with sunlight until the water content is less than 10%.
As shown in fig. 2, in step S103, preparing a hydrolysate using sodium bicarbonate and absolute ethanol includes:
s201, weighing 1-3 parts of sodium bicarbonate and 6-8 parts of absolute ethyl alcohol according to the mass parts;
s202, placing absolute ethyl alcohol in a stirrer, and adding sodium bicarbonate into the stirrer;
s203, setting the stirring temperature to be 22-26 ℃, and starting a stirrer to stir to obtain a sodium bicarbonate solution;
s204, performing ultrasonic dispersion on the sodium bicarbonate solution, wherein the dispersion frequency is 50-55 kHz, the dispersion time is 2-5 min, and obtaining a hydrolysate after the ultrasonic treatment is finished.
In step S103 provided by the embodiment of the present invention, the soybean chips and the hydrolysate are mixed, and the mass ratio of the soybean chips to the hydrolysate is (1-2): (3-5).
As shown in fig. 3, in step S103, the preparation of the ultrafiltration membrane according to the embodiment of the present invention includes:
s301, dissolving dimethyl sulfoxide into a sodium hydroxide solution to obtain a dimethyl sulfoxide solution;
s302, adding poly (p-phenylene terephthalamide) nano fibers into a dimethyl sulfoxide solution to obtain a mixed solution;
s303, adding 4, 4' -dichlorodiphenyl sulfone into the mixed solution, and uniformly stirring the membrane casting solution;
s304, coating the casting solution on the surface of the solid, solidifying, and taking down the solidified membrane to obtain the ultrafiltration membrane.
The conditions for coating the casting solution on the surface of the solid for solidification provided by the embodiment of the invention are as follows: setting the solidification pressure to be 0.01-0.03 MPa, and setting the solidification temperature to be 40-50 ℃.
As shown in fig. 4, in step S104 provided in the embodiment of the present invention, the homogenizing treatment of the protein solution to obtain a treated protein solution includes:
s401, mixing the protein solution and distilled water according to a mass ratio (1-3): (50-60), mixing, and uniformly stirring to obtain protein liquid;
s402, placing the protein liquid into a homogenizer for homogenization to obtain a protein dispersion liquid;
and S403, placing the protein dispersion liquid into a homogenizer, and setting the homogenizing pressure to be 80-150 MPa for homogenizing treatment to obtain a treated protein solution.
In step S104 provided by the embodiment of the invention, the temperature of the spray drying is 80-100 ℃, and the drying time is 20-30 min.
As shown in fig. 5, in step S106, the processing of the soy protein peptide solution to obtain pure soy protein peptide includes:
s501, placing the soybean protein peptide solution in a drying oven;
s502, setting the drying temperature to be 30-40 ℃, and pre-drying for 10-20 min;
s503, after the pre-drying is finished, setting the drying temperature to be 50-55 ℃, drying for 20-50 min, and taking out a dried product;
and S504, crushing and grinding the dried product to obtain pure soybean protein peptide.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.
Claims (10)
1. A membrane method for extracting soybean protein peptide and further processing is characterized in that the membrane method for extracting soybean protein peptide and further processing comprises the following steps:
step one, selecting soybean raw materials to be deeply processed: in the harvesting season of soybean, selecting clear weather to harvest soybean pods; selecting and picking pods which are full and have 3-4 soybeans, spreading the picked pods, airing the pods in the sun, stripping the pods, taking out the soybeans and collecting the soybeans; selecting soybeans with smooth and undamaged surface and uniform particle size as soybean raw materials to be deeply processed;
step two, preprocessing the selected soybean raw materials to be deeply processed: placing the selected soybean raw material for deep processing into water, wherein the soybean raw material is prepared by mixing the soybean raw material with the water according to the mass ratio of 1: 10, and soaking for 6-8 hours; after soaking, fishing out the soybeans, putting the soaked soybeans into a peeling machine for removing soybean hulls, and keeping soybean embryos;
step three, preparing hydrolysate by using sodium bicarbonate and absolute ethyl alcohol: weighing 1-3 parts of sodium bicarbonate and 6-8 parts of absolute ethyl alcohol according to the mass parts; placing absolute ethyl alcohol in a stirrer, and then adding sodium bicarbonate into the stirrer; setting the stirring temperature to be 22-26 ℃, and starting a stirrer to stir to obtain a sodium bicarbonate solution; performing ultrasonic dispersion on the sodium bicarbonate solution to obtain a hydrolysate after the ultrasonic treatment is finished;
step four, preparing an ultrafiltration membrane: dissolving dimethyl sulfoxide in a sodium hydroxide solution to obtain a dimethyl sulfoxide solution; adding poly (p-phenylene terephthalamide) nano-fibers into a dimethyl sulfoxide solution to obtain a mixed solution; adding 4, 4' -dichlorodiphenyl sulfone into the mixed solution, and uniformly stirring the casting solution; coating the membrane casting solution on the surface of a solid, solidifying, and taking down the solidified membrane to obtain an ultrafiltration membrane;
step five, extracting the soybean embryo by a membrane method to obtain soybean protein: crushing the soybean embryo in a crusher to obtain soybean fragments; mixing the soybean scraps with the hydrolysate, soaking for 10-12 h, filtering, removing solid substances and collecting an extracting solution; filtering the extracting solution by using an ultrafiltration membrane to obtain a whey solution and a protein solution;
step six, preparing the isolated soy protein by using the protein solution: collecting the filtered protein solution, and homogenizing the protein solution to obtain a treated protein solution; sterilizing the treated protein solution, and then concentrating in a concentrator to obtain protein slurry; spray drying the protein slurry to obtain soybean protein isolate;
step seven, extracting the soybean protein isolate by a membrane method to obtain soybean protein peptide: preparing protease hydrolysate, mixing the isolated soy protein with the protease hydrolysate, and hydrolyzing the isolated soy protein to obtain hydrolysate; filtering the hydrolysate with ultrafiltration membrane, and collecting the filtered substance to obtain soybean protein peptide;
step eight, purifying the soybean protein peptide: dissolving the collected soybean protein peptide in distilled water, and fully stirring until the solid substances are completely dissolved to obtain a soybean protein peptide solution; the soybean protein peptide solution is processed to obtain pure soybean protein peptide.
2. The membrane-method-based soybean protein peptide deep-processing method as claimed in claim 1, wherein in the first step, the harvest season of the soybeans is 2-3 months after the flowering phase of the soybeans.
3. The membrane method extraction soybean protein peptide deep processing method as claimed in claim 1, wherein in the first step, the sun-drying the picked pods comprises: and (4) directly irradiating the pods with sunlight until the water content is less than 10%.
4. The membrane method for extracting soybean protein peptide deep processing as claimed in claim 1, wherein in the third step, the conditions for performing ultrasonic dispersion on the sodium bicarbonate solution are as follows: setting the ultrasonic dispersion frequency to be 50-55 kHz and the ultrasonic dispersion time to be 2-5 min.
5. The deep processing method for extracting soybean protein peptide by the membrane method according to claim 1, wherein in the fourth step, the conditions for coating the membrane casting solution on the surface of the solid for solidification are as follows: setting the solidification pressure to be 0.01-0.03 MPa, and setting the solidification temperature to be 40-50 ℃.
6. The membrane method for extracting soybean protein peptide for further processing as claimed in claim 1, wherein in the fifth step, the soybean fragments and the hydrolysate are mixed, and the mass ratio of the soybean fragments to the hydrolysate is (1-2): (3-5).
7. The membrane-method-based soybean protein peptide deep-processing method as claimed in claim 1, wherein in the sixth step, the step of homogenizing the protein solution to obtain a treated protein solution comprises the following steps:
(1) mixing a protein solution and distilled water according to a mass ratio of (1-3): (50-60), mixing, and uniformly stirring to obtain protein liquid;
(2) placing the protein liquid into a homogenizer for homogenization to obtain a protein dispersion liquid;
(3) and (3) placing the protein dispersion liquid into a homogenizer, and setting the homogenizing pressure to be 80-150 MPa for homogenizing treatment to obtain a treated protein solution.
8. The membrane-method-extracted soybean protein peptide deep-processing method as claimed in claim 1, wherein in the sixth step, the temperature of spray drying is 80-100 ℃, and the drying time is 20-30 min.
9. The membrane method for extracting soybean protein peptide deep processing method as claimed in claim 1, wherein in step eight, the step of processing the soybean protein peptide solution to obtain pure soybean protein peptide comprises the following steps:
(1) putting the soy protein peptide solution into a drying oven;
(2) setting the drying temperature to be 30-40 ℃, and drying for 10-20 min for pre-drying;
(3) and after the pre-drying is finished, taking out the dried product, crushing the dried product, and grinding to obtain the pure soybean protein peptide.
10. The membrane method for extracting soybean protein peptide deep processing method as claimed in claim 9, wherein the conditions of pre-drying are as follows: the pre-drying temperature is set to be 50-55 ℃, and the pre-drying time is set to be 20-50 min.
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