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A kind of method that utilizes immobilized cell technology to ferment and produce feed enzyme preparation

A technology for immobilizing cells and feed enzyme preparations, applied in microorganism-based methods, biochemical equipment and methods, immobilization on/in organic carriers, etc., can solve the problems of low production efficiency, complex production process, and production costs. Advanced problems, to achieve the effect of improving production efficiency, easy mass transfer, and prolonging service life

Active Publication Date: 2020-09-11
佳纬生物技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has defects such as complicated production process, low production efficiency and high production cost, and technical improvement is urgently needed

Method used

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  • A kind of method that utilizes immobilized cell technology to ferment and produce feed enzyme preparation
  • A kind of method that utilizes immobilized cell technology to ferment and produce feed enzyme preparation
  • A kind of method that utilizes immobilized cell technology to ferment and produce feed enzyme preparation

Examples

Experimental program
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Effect test

preparation example Construction

[0045] 1) Preparation of crude enzyme solution: After the cultivation, the filtrate separated by filtration from the fermentation broth was centrifuged at 5000r / min for 20min, and the obtained supernatant was the crude enzyme solution.

[0046] 2) Carboxymethyl cellulase: take 0.5mL of crude enzyme solution, mix it with 1.5mL of 1% CMC-Na and citrate buffer (pH5.0), react in a water bath at 50°C for 30min, and measure it by DNS method after reaction Reducing sugar produced by enzymatic hydrolysis. The amount of enzyme required to generate 1 μmol of glucose from the substrate per hour under the above conditions is defined as an enzyme activity unit U.

[0047] 3) α-amylase: Mix 2.0mL of crude enzyme solution with 2.0mL of citric acid buffer (pH5.5), add 2.0mL of 1% starch solution, shake well, heat in a water bath at 40°C for 5min, then add 4.0mL of 0.4 M NaOH solution to terminate the reaction, take 2.0mL of the reacted solution, mix it with 2.0mL DNS solution, heat in a boil...

Embodiment 1

[0050] Test according to the technical scheme of using immobilized cell technology to ferment and produce feed enzyme preparation provided by the present invention, the steps are as follows:

[0051] Activation and expansion of S1 strain

[0052] 1) Aspergillus niger and Trichoderma konii: Take the preserved strains of Aspergillus niger and Trichoderma konii, inoculate them on PDA medium plates respectively, and culture them at 30°C for 3-5 days, whichever is full of spores; inoculate the spores with sterile After washing with normal saline, prepare a concentration of about 1×10 7 spore suspension per ml, put the spore suspension into the PDB medium with 5% inoculum amount, cultivate it on a rotary shaker at 30°C and 150rpm for 24-30h, and obtain the bacterial suspensions of these two bacteria respectively;

[0053] 2) Bacillus subtilis and Bacillus natto: Take the preserved strains of Bacillus subtilis and Bacillus natto, inoculate them on the slant of LB solid medium, cultu...

Embodiment 2

[0062] Example 2 Effect of concentration of sodium alginate solution on enzyme production

[0063] According to the method of Example 1, the concentration of the sodium alginate solution used in step S2 is set to 2%, 4%, 6%, 8%, 10%, and the other operations are the same, and the crude enzyme liquid is prepared after the fermentation enzyme production is completed. The activities of three representative enzymes, carboxymethyl cellulase, α-amylase and protease, were measured, and the results were as follows: figure 1 shown. The results showed that too high a concentration of sodium alginate solution would reduce the porosity of the carrier, thereby affecting the diffusion of enzyme molecules from the carrier into the fermentation broth, while too low a concentration would reduce the strength of the carrier, and the carrier would be easily broken under the action of shear force. Making the bacteria free in the fermentation broth will affect the effect of enzyme production and f...

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Abstract

The invention discloses a method for fermenting production of a feed enzyme preparation by an immobilized cell technology, wherein the method comprises the following steps: S1, activation and enlargedculture of strains; S2, preparation of immobilized cells; S3, electrification culture of the immobilized cells; S4, fermentation enzyme-production culture; S5, separation and purification of an enzyme preparation; and S6, recycling. The immobilized cell technology is used for immobilizing aspergillus niger, trichoderma koningii, bacillus subtilis and bacillus natto together in carrier granules, and mixed fermentation is carried out to produce the feed enzyme preparation; with mutually beneficial symbiosis among the strains, the variety of produced enzymes is abundant. Compared with a method of single fermentation to produce various enzymes and then compounding, the method can simplify the production process, shorten the production cycle and greatly improve the production efficiency. The prepared immobilized cell particles have the advantages of good stability and easy separation and recovery, can be recycled for enzyme production, greatly reduce production costs, and have good application prospects in the field of feed enzyme preparation production.

Description

technical field [0001] The invention belongs to the field of feed additive production, and in particular relates to a method for fermenting and producing feed enzyme preparation using immobilized cell technology. Background technique [0002] Feed enzyme preparation is a feed additive with enzyme as the main functional factor. The source of enzyme includes plants, animals and microorganisms, etc., which can be obtained by extraction or fermentation. Studies have shown that feed enzyme preparations are non-toxic, harmless, and non-residual to animals, and will not have negative effects on animals. First of all, the essence of the enzyme preparation is protein, which will be decomposed into amino acids and polypeptides after entering the animal's digestive tract and will not remain after being absorbed by the body; secondly, the enzyme preparation added to the feed belongs to exogenous enzymes. There are some differences from the endogenous enzymes secreted by animals themsel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/14C12N1/20C12N11/10C12N9/00C12R1/685C12R1/885C12R1/125C12R1/07
CPCC12N1/14C12N1/20C12N9/00C12N11/10
Inventor 刘晶孔繁玲周天策
Owner 佳纬生物技术有限公司
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