Method for preparing protein feed by solid fermenting potato slag

A potato residue and protein feed technology, applied in the field of protein feed, can solve the problems of difficult to accurately measure solid-state fermentation parameters, imperfect design of biochemical reactors, slow growth rate of microorganisms, etc. The effect of color improvement

Active Publication Date: 2007-01-24
CHINESE ACAD OF AGRI MECHANIZATION SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Compared with liquid fermentation, solid fermentation has the following disadvantages: 1) The production process is mainly limited to bacteria resistant to low water activity; 2) The growth rate of microorganisms is slow and the products are limited; 3) When large-scale operations are performed, the metabolic heat generated is difficult It is difficult to accurately measure the parameters of solid-state fermentation in the production process, and it is difficult to realize the mechanization of operation and the automation of control; 4) The design of the biochemical reactor is not perfect, and the traditional fermentation method is easy to be contaminated with bacteria
[0010] (1) In order to prevent the raw materials from being polluted by miscellaneous bacteria during the fermentation process, the raw materials of the fermentation process need to be sterilized by high temperature in advance, which will cause a large amount of energy consumption and greatly increase the production cost;
[0011] (2) Secondary fermentation is adopted, the production process is complicated, and the production cost is increased

Method used

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  • Method for preparing protein feed by solid fermenting potato slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of slant strains

[0066] Use potato glucose slant medium or 5Be° wort slant medium to inoculate Aspergillus niger and Geotrichum candidum strains respectively (the preservation number of Aspergillus niger is ATCC 1004, and the preservation number of Geotrichum candidum is ATCC 10834) in strict accordance with aseptic procedures and cultivate them at 28°C Cultivate in the box for 60 hrs to make slant strains and store them in the refrigerator for later use.

[0067] (2) Expansion of primary strains

[0068] Potato glucose liquid medium was used to insert two rings of slant bacteria, and cultivated in a shaking incubator at 28°C and 180r / min for 48hrs.

[0069] (3) Secondary strain expansion

[0070] Stir the bran with water evenly, 1 kg / cm 2 Sterilize for 30 minutes, cool to 35°C to 40°C, then inoculate the first-grade strains with an inoculation amount of 1%, stir evenly and place in a shallow dish with a medium thickness of 2 to 4 cm, and cultivate ...

Embodiment 2

[0073] Take 100kg of potato dregs after pressing and dehydration, add 15% bran, 0.5% urea, 1.5% ammonium sulfate, and 0.75% superphosphate in proportion, inoculate 5% Aspergillus niger, 15% Geotrichum candidum, and the water content of the material is 68 %, fermented in a solid-state fermenter (provided by the Chinese Academy of Agricultural Mechanization Sciences), the fermentation temperature is 28-30°C, the humidity is 90%, and after 50 hours of fermentation, it is dried at 60-65°C for 5 hours to prepare the finished protein feed.

[0074] Comparison of inspection results between protein feed and potato dregs raw materials

Embodiment 3

[0076] The protein feed product and potato dregs raw material produced by the method of Example 2 are respectively inspected (through the pressing and dehydration step described in Example 2), wherein the assay method of crude protein content refers to GB / T14771-1993, and the assay method of amino acid content refers to GB / T18246-2000, the determination method of vitamin B1 content refers to GB / T12390-1990, the determination method of vitamin B2 content refers to GB / T12391-1990.

[0077] The comparison of test results is shown in Table 1. It can be seen from the results that the protein content of the feed product increases by more than 60%, and the content of various amino acids is improved compared with the raw material, and the nutritional value is improved. In addition, the vitamin B content in the protein feed is also significantly improved compared with the raw material. The safety of the feed product meets the feed standard, and the color of the product is obviously imp...

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Abstract

The present invention is protein feed and its preparation process with potato slag. Protein feed is prepared with waste potato slag from starch production, and through squeezing to dewater, adding certain amount of supplementary material, inoculating certain amount of microbe seed and solid fermentation. The said preparation process is simple, and has high yield, low investment, low power consumption and other advantages. Thus obtained feed product has the fermented product, including microbe, metabolite and substrate utilized fully, and possesses the active components maintained, high amino acid content and high nutritious value.

Description

technical field [0001] The invention relates to a method for preparing protein feed, in particular to a method for preparing protein feed by using potato starch residue. [0002] The present invention also relates to the protein feed prepared by the above method. [0003] The present invention also relates to a feed comprising the above-mentioned protein feed. Background technique [0004] my country's potato starch industry has developed rapidly, with an average annual growth rate of more than 30%. In 2001, the output exceeded 120,000 tons. Generally, 7.5 tons of waste residue is produced for every ton of starch produced. The waste residue contains proteins, amino acids, sugars and other substances, which are important resources that can be used. If they are not recycled, it will not only cause waste of resources, but also be used by microorganisms. During the peak processing season, when the potato residues are relatively concentrated, they pile up like a mountain, rotte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/00A23J3/14A23K10/12A23K10/35
Inventor 赵风敏李树君赵有斌王远尹学清
Owner CHINESE ACAD OF AGRI MECHANIZATION SCI
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