Method for preparing feed protein powder and fermentation nutrition accelerator by comprehensive utilization of corn soaking water

A technology of corn soaking water and nutrient accelerators, applied in fermentation, protein food ingredients, protein food processing, etc., can solve the problems of low utilization and narrow application

Active Publication Date: 2018-08-07
SHANDONG LUZHOU FOOD GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has certain benefits for reducing bacterial contamination, but this method has a low degree of utilization for the post-processing of the soaking liquid and the application of feed, and the application range is narrow, which has great limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0038] The present invention will be further described below in conjunction with the examples, but not limited thereto. The content % in the embodiment is all mass percent.

[0039] The raw material in the embodiment is the corn soaking water of the sulfurous acid countercurrent soaking process produced by corn starch, which is taken from Luzhou Biotechnology (Shandong) Co., Ltd.; the phytase in the embodiment is a liquid enzyme, purchased from Wuhan New Huayang Biological Co., Ltd. , Enzyme activity 5000U / mL. The ceramic membranes, 4040 ultrafiltration membranes, and 4040 nanofiltration membranes used in the examples are all commonly used products in this field and are available in the market.

[0040] Terminology Explanation: Ultrafiltration membrane cut-off pore diameter 5000D, 8000D refers to ultrafiltration membrane pore diameter cut-off molecular weight 5000 Dalton, 8000 Dalton, referred to as cut-off pore size 5000D, cut-off pore size 8000D.

[0041] The equipment use...

Embodiment 1

[0045] Embodiment 1, the method for comprehensive utilization of corn soaking water to produce feed protein powder and fermentation nutrition accelerator, the steps are as follows:

[0046] (1) Enzymatic hydrolysis of phytic acid in soaking water

[0047] Measure the volume L of corn soaking water, add phytase according to 1000U / L, and hydrolyze for 5 hours at a temperature of 45°C. The detected phytic acid content is 0.12%, and the hydrolysis rate of phytic acid is 90%.

[0048] (2) Microfiltration

[0049] The soaking water after enzymolysis is pretreated with a microfiltration membrane. The microfiltration membrane is a ceramic membrane (Anhui Pulang Membrane Separation Co., Ltd.), with a pore size of 0.2 microns, a filtration pressure of 2-4MPa, and an initial clear liquid flow rate of 2L / min. When the clear liquid flow rate drops to 0.4L / min, the separation is stopped, and the mother liquid (impermeable liquid) and clear liquid (permeate liquid) are collected respectivel...

Embodiment 2

[0069] Embodiment 2, the method for comprehensive utilization of corn soaking water to produce feed protein powder and fermentation nutrition accelerator, the steps are as follows:

[0070] (1) Enzymatic hydrolysis of phytic acid in soaking water

[0071] Accurately measure the volume of corn soaking water, add phytase at 1500U / L, and hydrolyze for 4 hours at a temperature of 40°C. The detected phytic acid content is 0.15%, and the hydrolysis rate of phytic acid is 87.5%.

[0072] (2) Microfiltration

[0073] The soaking water after enzymatic hydrolysis is pretreated by microfiltration membrane. The microfiltration membrane is a ceramic membrane with a pore size of 0.5 microns and a filtration pressure of 2-3MPa. The initial clear liquid flow rate is 2.4L / min. , stop the separation, respectively collect the mother liquor (non-permeable liquid) and clear liquid (permeate liquid), and the main components of the mother liquor are insoluble protein particles.

[0074] (3) ultraf...

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Abstract

The invention relates to a method for comprehensively utilizing corn soaking water to prepare feed protein powder and a fermentation nutrition accelerator. The invention uses corn soaking water as raw material, undergoes phytase hydrolysis pretreatment, microfiltration and ultrafiltration to obtain a concentrated liquid with macromolecular protein as the main component, and obtains protein powder for feed through concentration and drying, which can be used as protein raw material for feed use. The ultrafiltrate is mainly composed of small molecule peptides and amino acids, and is rich in nutrients needed by microorganisms such as biotin, vitamin B1, and nutrient salts. It is concentrated by nanofiltration, and sulfurous acid, lactic acid, and part of the salt are separated and removed, and further concentrated to obtain Fermentation nutrient accelerator, used in the fermentation industry as a replacement product of corn steep liquor or in place of yeast extract. The invention utilizes modern separation technology to process corn soaking water, a by-product of corn starch, into high-value-added protein powder for feed and a fermentation nutrition accelerator, thereby improving the comprehensive utilization of resources.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing corn soaking water to prepare feed protein powder and a fermentation nutrition accelerator, and belongs to the technical field of corn deep processing. Background technique [0002] In my country's starch industry, starch sugar industry, and polyol industry, 90% of new fermented products using starch as raw material use corn as raw material, and are mainly produced by wet milling process. In the production process of corn starch, in addition to the main product corn starch, corn steep liquor (soaking water), germ, corn bran, protein powder, etc. are also obtained. At present, corn germ and protein powder are better utilized. Corn steep liquor is the concentrate of corn steeping water. The protein content of corn steep liquor is about 50%. Although it is rich in soluble protein, amino acids and multivitamins, it is high in salt and contains anti-nutritional factors such as phytic acid and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P21/00A23J3/00A23K20/147
Inventor 赵玉斌王德友牛纪超王新增
Owner SHANDONG LUZHOU FOOD GROUP
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