Process method for improving moisture absorption of protein peptide from corn soaking water

Abstract

The invention relates to the technical field of corn soaking water treatment, in particular to a process method for improving moisture absorption of protein peptide sourced from corn soaking water, which comprises the following steps: adding a first moisture-proof agent consisting of beta-cyclodextrin, potassium ferrocyanide and citric acid into protein peptide primary pulp, heating, stirring, mixing, filtering, and drying the collected filtrate to obtain a second moisture-proof agent; and adding a second moisture-proof agent composed of magnesium stearate and pregelatinized starch into the obtained dry powder, and stirring and mixing to obtain the protein peptide powder with improved moisture absorption.

Description

Technical Field

[0001] The invention relates to the technical field of corn soaking water treatment, in particular to a process for improving the moisture absorption of protein peptides derived from corn soaking water. Background Art

[0002] The protein content of corn soaking water is 5-6%, which contains 17 kinds of amino acids required for animal growth, such as glutamic acid, leucine, alanine, and proline. The development and utilization of protein in corn soaking water can not only expand the source of feed protein, but also avoid the environmental pressure caused by the discharge of corn soaking water, which has extremely high economic and social benefits.

[0003] Corn gluten powder products are usually prepared by spray drying, and the product is in powder form. However, due to the strong hygroscopicity of small molecule sugars such as monosaccharides and oligosaccharides contained in corn gluten water, the powder fluidity decreases, lumps, becomes sticky, and even liquefies, which affects the production and use of corn gluten powder.

[0004] With the rapid development of biomedicine, food processing and other fields, the demand for high-stability and high-activity proteins is becoming increasingly urgent. However, the problem of protein moisture absorption has become one of the bottlenecks restricting the development of these fields. Therefore, it is necessary to develop a process for improving the moisture absorption of protein peptides derived from corn soaking water to address the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the deficiencies of the prior art, a process method for improving the moisture absorption of protein peptides derived from corn soaking water is provided. The process method can improve the moisture absorption problem of protein peptides and facilitate storage.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0008] (1) taking protein peptide slurry, adding the first moisture-proof agent, heating and stirring until clear, filtering, and collecting the filtrate for later use;

[0009] (2) taking the filtrate in step (1), drying it, and obtaining a dry powder for later use;

[0010] (3) Take the dry powder described in step (2), add the second moisture-proof agent, and stir to mix.

[0011] As an improved technical solution, the solid content of the protein peptide slurry in step (1) is 45-55wt%.

[0012] As an improved technical solution, in step (1), the first moisture-proof agent includes β-cyclodextrin, potassium ferrocyanide and citric acid, the amount of the β-cyclodextrin is 0.5-2% of the solid content of the protein peptide stock paste, the amount of the potassium ferrocyanide is 0.02-0.1% of the solid content of the protein peptide stock paste, and the amount of the citric acid is 0.1-0.2% of the solid content of the protein peptide stock paste.

[0013] As an improved technical solution, in step (1), the mixture is heated to 40-50° C. and stirred for 1-2 hours.

[0014] As an improved technical solution, spray drying is adopted in step (2), and the air inlet temperature is controlled to be 180-200°C and the air outlet temperature is controlled to be 80-100°C.

[0015] As an improved technical solution, the amount of the second desiccant in step (3) is 0.1-0.3% of the mass of the dry powder, and the second desiccant includes magnesium stearate and pregelatinized starch, and the magnesium stearate and the pregelatinized starch are mixed in a mass ratio of 1:1-2.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] The present invention adds a first moisture-proof agent consisting of beta-cyclodextrin, potassium ferrocyanide and citric acid to a protein peptide stock, heats and stirs to mix, filters, collects filtrate and dries, adds a second moisture-proof agent consisting of magnesium stearate and pregelatinized starch to the obtained dry powder, stirs and mixes, and the moisture absorption of the obtained protein peptide powder is improved. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Example 1

[0020] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0021] (1) Take 10 L of protein peptide stock with a solid content of 45 wt%, add the first moisture-proof agent (including β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of β-cyclodextrin is 0.5% of the solid content of the protein peptide stock, the amount of potassium ferrocyanide is 0.02% of the solid content of the protein peptide stock, and the amount of citric acid is 0.1% of the solid content of the protein peptide stock), heat to 40° C., stir for 1 h to clarify, filter, and collect 10 L of the filtrate for later use;

[0022] (2) Take 10 L of the filtrate from step (1), spray dry it (control the inlet air temperature at 180°C and the outlet air temperature at 80°C), and obtain 3.94 kg of dry powder for standby use;

[0023] (3) Take 1 kg of the dry powder in step (2), add 0.1% of the mass of the dry powder of the second moisture-proof agent (magnesium stearate and pregelatinized starch mixed in a mass ratio of 1:1), and stir to mix.

[0024] Example 2

[0025] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0026] (1) Take 10 L of protein peptide stock with a solid content of 48 wt%, add the first moisture-proof agent (including β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of β-cyclodextrin is 0.8% of the solid content of the protein peptide stock, the amount of potassium ferrocyanide is 0.04% of the solid content of the protein peptide stock, and the amount of citric acid is 0.12% of the solid content of the protein peptide stock), heat to 42 ° C, keep warm and stir for 1.2 h until it is clear, filter, and collect 10 L of the filtrate for use;

[0027] (2) Take 10 L of the filtrate from step (1), spray dry it (control the inlet air temperature at 185°C and the outlet air temperature at 85°C), and obtain 4.24 kg of dry powder for standby use;

[0028] (3) Take 1 kg of the dry powder in step (2), add 0.15% of the mass of the dry powder of a second moisture-proof agent (magnesium stearate and pregelatinized starch mixed in a mass ratio of 1:1.2), and stir to mix.

[0029] Example 3

[0030] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0031] (1) Take 10 L of protein peptide stock with a solid content of 50 wt%, add the first moisture-proof agent (including β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of β-cyclodextrin is 1.2% of the solid content of the protein peptide stock, the amount of potassium ferrocyanide is 0.06% of the solid content of the protein peptide stock, and the amount of citric acid is 0.15% of the solid content of the protein peptide stock), heat to 45 ° C, keep warm and stir for 1.5 h until it is clear, filter, and collect 10 L of the filtrate for use;

[0032] (2) Take 10 L of the filtrate from step (1), spray dry it (control the inlet air temperature at 190° C. and the outlet air temperature at 90° C.), and obtain 4.56 kg of dry powder for standby use;

[0033] (3) Take 1 kg of the dry powder in step (2), add 0.2% of the mass of the dry powder of a second moisture-proof agent (magnesium stearate and pregelatinized starch mixed in a mass ratio of 1:1.5), and stir to mix.

[0034] Example 4

[0035] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0036] (1) Take 10 L of protein peptide stock with a solid content of 52 wt%, add the first moisture-proof agent (including β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of β-cyclodextrin is 1.6% of the solid content of the protein peptide stock, the amount of potassium ferrocyanide is 0.08% of the solid content of the protein peptide stock, and the amount of citric acid is 0.18% of the solid content of the protein peptide stock), heat to 48 ° C, keep warm and stir for 1.8 h until it is clear, filter, and collect 10 L of the filtrate for use;

[0037] (2) Take 10 L of the filtrate in step (1), spray dry it (control the inlet air temperature at 195°C and the outlet air temperature at 95°C), and obtain 4.73 kg of dry powder for standby use;

[0038] (3) Take 1 kg of the dry powder in step (2), add 0.25% of the mass of the dry powder of a second moisture-proof agent (magnesium stearate and pregelatinized starch mixed in a mass ratio of 1:1.8), and stir to mix.

[0039] Example 5

[0040] A process for improving the moisture absorption of a protein peptide derived from corn soaking water, comprising the following steps:

[0041] (1) Take 10 L of protein peptide stock with a solid content of 55 wt%, add the first moisture-proof agent (including β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of β-cyclodextrin is 2% of the solid content of the protein peptide stock, the amount of potassium ferrocyanide is 0.1% of the solid content of the protein peptide stock, and the amount of citric acid is 0.2% of the solid content of the protein peptide stock), heat to 50° C., stir for 2 h to clarify, filter, and collect 10 L of the filtrate for later use;

[0042] (2) Take 10 L of the filtrate in step (1), spray dry it (control the inlet air temperature at 200° C. and the outlet air temperature at 100° C.), and obtain 4.96 kg of dry powder for standby use;

[0043] (3) Take 1 kg of the dry powder in step (2), add 0.3% of the mass of the dry powder of the second moisture-proof agent (magnesium stearate and pregelatinized starch mixed in a mass ratio of 1:2), and stir to mix.

[0044] In order to better prove that the process of the present invention can improve the hygroscopicity of protein peptides, 8 comparative examples are given with reference to Example 3; the protein peptides prepared in Examples 1-5 and Comparative Examples 1-8 are subjected to hygroscopic tests, and the specific operation is as follows: 10 g of each of the protein peptide powders prepared in Examples 1-5 and Comparative Examples 1-8 are placed in a constant temperature and humidity incubator, set at 30°C and 70% humidity, and observe the hygroscopicity of the samples for 2h, 6h, 10h, 14h, 18h and 24h. The specific test results are shown in Table 1.

[0045] Comparative Example 1

[0046] The difference from Example 3 is that the first moisture-proof agent in step (1) does not contain β-cyclodextrin, and the remaining operations are the same.

[0047] Comparative Example 2

[0048] The difference from Example 3 is that the first moisture-proof agent in step (1) does not contain potassium ferrocyanide, and the remaining operations are the same.

[0049] Comparative Example 3

[0050] The difference from Example 3 is that the first moisture-proof agent in step (1) does not contain citric acid, and the remaining operations are the same.

[0051] Comparative Example 4

[0052] The difference from Example 3 is that the amount of β-cyclodextrin in the first moisture-proof agent in step (1) is 0.3% of the solid content of the protein peptide stock paste, and the other operations are the same.

[0053] Comparative Example 5

[0054] The difference from Example 3 is that the temperature in step (1) is heated to 35° C., and the remaining operations are the same.

[0055] Comparative Example 6

[0056] The difference from Example 3 is that the temperature in step (1) is heated to 55° C., and the remaining operations are the same.

[0057] Comparative Example 7

[0058] The difference from Example 3 is that the second moisture-proof agent in step (3) includes magnesium stearate and microcrystalline cellulose, and the rest of the operations are the same.

[0059] Comparative Example 8

[0060] The difference from Example 3 is that the second moisture-proof agent in step (3) includes microcrystalline cellulose and pregelatinized starch, and the rest of the operations are the same.

[0061] Table 1

[0062]

[0063]

[0064]

[0065] It can be found from the data in Table 1 that, by using the process method of the present invention, Example 3 greatly improves the hygroscopicity of the protein peptide compared with other examples and Comparative Examples 1-8. It should be noted that the data on the percentage of compaction in 24h given in Example 1 and Example 2 in Table 1 (without surface limitation) are calculated according to the total amount of the entire material, which is also applicable to Comparative Examples 1-8.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for improving the hygroscopicity of protein peptides derived from corn soaking water, characterized in that: The following steps are involved: (1) taking protein peptide slurry, adding the first moisture-proof agent, heating and stirring until clear, filtering, and collecting the filtrate for later use; (2) taking the filtrate in step (1), drying it, and obtaining a dry powder for later use; (3) Take the dry powder described in step (2), add the second moisture-proof agent, and stir to mix.

2. A process for improving the hygroscopicity of protein peptides derived from corn soaking water according to claim 1, characterized in that: The solid content of the protein peptide slurry in step (1) is 45-55wt%.

3. The process for improving the hygroscopicity of protein peptides derived from corn soaking water according to claim 1, characterized in that: In step (1), the first moisture-proof agent comprises β-cyclodextrin, potassium ferrocyanide and citric acid, wherein the amount of the β-cyclodextrin is 0.5-2% of the solid content of the protein peptide stock paste, the amount of the potassium ferrocyanide is 0.02-0.1% of the solid content of the protein peptide stock paste, and the amount of the citric acid is 0.1-0.2% of the solid content of the protein peptide stock paste.

4. The process for improving the hygroscopicity of protein peptides derived from corn soaking water according to claim 1, characterized in that: In step (1), heat to 40-50°C and stir for 1-2h.

5. The process for improving the hygroscopicity of protein peptides derived from corn soaking water according to claim 1, characterized in that: In step (2), spray drying is adopted, and the inlet air temperature is controlled to be 180-200°C and the outlet air temperature is controlled to be 80-100°C.

6. The process for improving the hygroscopicity of protein peptides derived from corn soaking water according to claim 1, characterized in that: In step (3), the dosage of the second desiccant is 0.1-0.3% of the mass of the dry powder. The second desiccant includes magnesium stearate and pregelatinized starch, and the magnesium stearate and the pregelatinized starch are mixed in a mass ratio of 1:1-2.

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