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Chemical treatment method for cottonseed protein detoxification processing

A technology for chemical treatment and cottonseed protein, applied in the field of cottonseed meal processing, can solve the problems of low dephenolization rate, solvent recovery and residue, high energy consumption, harsh fermentation conditions, etc. The effect of high protein recovery

Active Publication Date: 2018-12-11
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from a technical perspective, there are still many imperfections in the key technology for removing anti-nutritional factors from cotton meal, for example: the solvent extraction method has problems of low phenol removal rate, solvent recovery and residue, and the residual phenol in the meal The solvent directly affects the palatability of animals; the microbial fermentation method has defects such as harsh fermentation conditions, long production cycle, high energy consumption, large dry matter consumption, and unstable quality of the final product; while the chemical reagent method (such as: ferrous sulfate) is simple to operate , The labor intensity is not big, but it is difficult to avoid the problem of reagent residue

Method used

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  • Chemical treatment method for cottonseed protein detoxification processing
  • Chemical treatment method for cottonseed protein detoxification processing
  • Chemical treatment method for cottonseed protein detoxification processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Take 5g of dry cottonseed meal that has been mechanically crushed and passed through a 30-mesh sieve, add 25mL of hydrogen peroxide solution with a concentration of 3% and pH 4.0, mix well, soak in a 70℃ water bath for 1.5h, and then pass it through a centrifuge at 4000rpm Centrifuge at speed for 5 minutes, discard the supernatant, and collect the solids;

[0045] (2) Add tap water with a solid-to-liquid mass ratio of 1:10 to the solids, soak for 4 minutes at 22°C (continuous stirring during the soaking process), then centrifuge at 4000 rpm for 5 minutes through a centrifuge, and discard Supernatant, and then repeat the above-mentioned tap water soaking and centrifugal treatment process once, the supernatant obtained by centrifugation will not change color by the acid starch potassium iodide solution, discard the supernatant and collect the precipitate;

[0046] (3) Dry the precipitate in a ventilated drying box at a temperature of 50°C until the water content of the mat...

Embodiment 2

[0048] (1) Take 5g of dry cottonseed meal that has been mechanically crushed and passed through a 50-mesh sieve, add 10 mL of hydrogen peroxide solution with a concentration of 1.5% and pH 6.0, mix well, soak in a water bath at 80°C for 3 hours, and then pass it through a centrifuge at 4000 rpm. Centrifuge at speed for 10 minutes, discard the supernatant, and collect the solids;

[0049] (2) Add tap water with a solid-liquid mass ratio of 1:20 to the solids, soak for 3 minutes at 25°C (continuous stirring during the soaking process), and then centrifuge at 4000 rpm for 10 minutes through a centrifuge, and discard Supernatant, and then repeat the above-mentioned tap water soaking and centrifugal treatment process once, the supernatant obtained by centrifugation is not colored by the acid starch potassium iodide solution, discard the supernatant and collect the precipitate;

[0050] (3) Dry the precipitate in a ventilated drying box at a temperature of 80°C until the water content of...

Embodiment 3

[0052] (1) Take 20g of dry cottonseed meal that has been mechanically crushed and passed through a 50-mesh sieve, add 80 mL of 2.5% hydrogen peroxide solution with a pH of 8.0, mix well, soak in a water bath at 50°C for 8 hours, and then pass it through a centrifuge at 3000 rpm Leave for 15 minutes, discard the supernatant, and collect the solids;

[0053] (2) Add tap water with a solid-to-liquid mass ratio of 1:12 to the solids, soak for 2 minutes at 27°C (continuously stirring during the soaking process), then centrifuge at 3000 rpm for 15 minutes through a centrifuge, and discard Supernatant, and then repeat the above tap water soaking and centrifugation process 3 times, the supernatant obtained by centrifugation is not discolored by the acid starch potassium iodide solution, discard the supernatant and collect the precipitate;

[0054] (3) Dry the precipitate under the sun irradiation at a temperature of 30°C until the water content of the material is not higher than 15%, and 1...

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Abstract

The invention discloses a chemical treatment method for cottonseed protein detoxification processing, comprising the following steps: adding a hydrogen peroxide solution to cottonseed meal powder forfirst immersion, and collecting a solid matter after solid-liquid separation; performing washing and drying treatment on the solid matter to obtain detoxified cottonseed meal. The technical scheme provided by the invention is to utilize the oxidizing property of hydrogen peroxide to oxidize the aromatic aldehyde group of free gossypol in cottonseed meal into a carboxyl group, thereby completely removing cotton toxin in the cottonseed meal, and the residual hydrogen peroxide in the cottonseed meal is easy to separate and remove after being washed with clear water, so that the cottonseed meal subjected to detoxification treatment is free of solvent residue, and further has the advantages of high protein recovery rate and high dephenolization rate, and the process is simple and easy to operate, and can meet the industrialization scale production needs.

Description

Technical field [0001] The invention relates to the technical field of cotton meal processing, in particular to a chemical treatment method for cottonseed protein detoxification processing. Background technique [0002] Cotton meal is a bulk non-grain protein raw material, its protein content is almost comparable to soybean meal, the amino acid composition is balanced, and the price is much lower than soybean meal. It could be used as an important protein raw material for feed processing, but because it contains gossypol—free gossypol. As a result, the utilization rate of cotton meal protein as a source of feed protein is less than 15%. Except for a few feeds used for ruminants, most of them are used as fertilizers, and the cost performance is extremely low. In order to make rational use of cottonseed protein resources and relieve the tension of my country's feed protein, a variety of cottonseed protein dephenolization technologies have been developed, mainly including chemical p...

Claims

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Application Information

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IPC IPC(8): A23L5/20
CPCA23L5/27
Inventor 张剑何东平
Owner WUHAN POLYTECHNIC UNIVERSITY
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