Extraction method of rapeseed protein and application of rapeseed protein to compound feed for Gymnocypris przewalskii

An extraction method and compound feed technology, which are applied in the fields of rapeseed protein and fish feed, can solve the problems of undiscovered Qinghai Lake naked carp, etc., and achieve the effects of improving taste and attracting food, reducing harmful microorganisms, and being easy to digest

Active Publication Date: 2014-01-01
林世琛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no very effective feed for breeding naked carps in Qinghai Lake

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Rapeseed protein extraction method using rapeseed as raw material

[0096] 1) Put rapeseed and water into the pressure cooker at a mass ratio of 1:2, then cook for 20 minutes under a pressure of 50kPa to make the rapeseed oil float on the water surface, then open the oil outlet valve of the pressure cooker, and drain the vegetable on the surface The seed oil is drained into the storage tank;

[0097] 2) Open the pressure cooker and let it cool down naturally. When the temperature of the remaining slurry in the pressure cooker drops to 45-60°C, add brine to the slurry to precipitate the rapeseed protein in the slurry; the mass ratio of the added brine to the mass of the slurry 1‰:1; then open the drain valve of the pressure cooker to drain the liquid in the pot;

[0098] 3) Collect the rapeseed protein in the pressure cooker, put it into a dryer for dehydration, and dry it to obtain the rapeseed protein powder.

Embodiment 2

[0100] Rapeseed protein extraction method using rapeseed as raw material

[0101] 1) Put rapeseed and water into the pressure cooker at a mass ratio of 1:3, and then cook for 25 minutes under a pressure of 70kPa to make the rapeseed oil float on the water surface, then open the oil outlet valve of the pressure cooker, and drain the vegetable on the surface The seed oil is drained into the storage tank;

[0102] 2) Open the pressure cooker and let it cool down naturally. When the temperature of the remaining slurry in the pressure cooker drops to 45-60°C, add brine to the slurry to precipitate the rapeseed protein in the slurry; the mass ratio of the added brine to the mass of the slurry It is 2‰:1; then open the drain valve of the pressure cooker to discharge the liquid in the pot;

[0103] 3) Collect the rapeseed protein in the pressure cooker, put it into a dryer for dehydration, and dry it to obtain the rapeseed protein powder.

Embodiment 3

[0105] Rapeseed protein extraction method using rapeseed cake as raw material

[0106] 1) Put the rapeseed cake and water into the refiner at a mass ratio of 1:2, and grind it into a rapeseed cake slurry;

[0107] 2) Input the rapeseed cake slurry into the cooking pot through the pipeline, heat at 90-120°C for 20 minutes to make the rapeseed oil float on the water surface, and then collect the oil layer on the surface into the oil storage tank;

[0108] 3) When the remaining slurry in the cooking pot is cooled to 45-60°C, add brine to the slurry to solidify the rapeseed protein in the slurry; the mass ratio of the added brine to the slurry is 2‰:1;

[0109] 4) Collect the rapeseed protein precipitated in step 3, put it into a spin dryer for dehydration, and dry it to obtain the rapeseed protein powder.

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Abstract

The invention discloses an extraction method of rapeseed protein and application of the rapeseed protein to compound feed for Gymnocypris przewalskii. According to the invention, the rapeseed protein of rapeseeds and rapeseed cakes, which serve as raw materials, are separated out by brine, and then are collected, so that anti-nutrients, such as glucosinolate, polyphenol and phytic acid, of the rapeseeds and the rapeseed cakes are removed. The compound feed for the Gymnocypris przewalskii provided by the invention is prepared by compounding the rapeseed protein serving as a raw material and substances such as fish meal, casein, milk powder, meat and bone meal and dry yeast powder, and the compound feed is applicable to all the growth stages, from fish fries to parent fish, of the Gymnocypris przewalskii, so that the source of the raw materials of the compound feed is greatly enriched and the cost of the compound feed is reduced.

Description

technical field [0001] The invention relates to the fields of rapeseed protein and fish feed, in particular to a method for extracting rapeseed protein and its application in Qinghai Lake naked carp compound feed. Background technique [0002] my country is a big rapeseed planting and producing country. Statistics show that in 2012, the global rapeseed output was 62.7 million tons, and my country's rapeseed output was 12.8 million tons, accounting for 20.4% of the global total. Rapeseeds can be pre-pressed and leached to obtain 50-55% rapeseed cake, and the total domestic output is expected to reach 6.72 million tons. Rapeseed cake contains 35-40% crude protein. Rapeseed protein is a full-price high-quality protein with almost no limiting amino acids. Compared with other vegetable oils, rapeseed protein has a higher content of methionine and cystine, and the content of lysine is second only to soybean protein. Judging from the amino acid composition of protein, the nutriti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K1/14A23K1/18A23K1/14A23K1/10A23K1/16A23K1/175
Inventor 林世琛
Owner 林世琛
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