Extraction method for functional animal protein sources

Abstract

The invention relates to an extraction method for functional animal protein sources, and belongs to the technical field of feed processing. Specifically, the method comprises the following steps: 1) pulverizing the animal protein sources; 2) mixing a polar organic solvent and a non-polar organic solvent in a ratio of 1:1-1:2, and adding the mixture into a stirring tank, wherein the polar organic solvent accounts for 40-60% of total weight of the animal protein sources, stirring the mixture within 70 DEG C by 250-500 rpm / min of stirring speed for 1-2 h; afterwards standing for 1 h; 3) extracting the mixed solution from step 2) with an animal oil extract in order to remove grease and moisture in the mixture while adding an OT penetrant accounting for 0.2-0.5% of total weight of the animal protein sources, then obtaining an extraction mixture; 4) processing the obtained extraction mixture with a vacuum atmospheric pressure method to obtain an extract solution; 5) processing the obtained extract solution from step 4) with a distillation process to obtain a semi-dried protein powder; 6) drying the semi-dried protein powder from step 5) with a spray drying method and then packaging. The method of the invention uses an extraction process to achieve high purification rate and low cost and meet environmental protection requirements.

Description

technical field [0001] The invention relates to a method for producing functional animal protein sources in the feed industry, and belongs to the technical field of feed processing. Background technique [0002] With the development and improvement of people's living standards, the supply of high-quality non-staple food has been continuously strengthened. The role of functional animal protein sources in pig, poultry (chicken, duck, goose) and aquatic products (fish, shrimp, etc.) farming cannot be ignored. The industry expects to use a relatively small amount to achieve the best farming effect. [0003] At present, the application of domestic animal protein sources is increasing year by year, and most of them rely on foreign imports. The existing technology is to use frying technology to produce protein powder and amino acid, and its technological process is as follows: animal protein source (animal offal, chicken bone, etc.) is fried → pressed to remove oil → dark powdery ...

AI Technical Summary

Problems solved by technology

The frying method is equivalent to the chemical method, and has the following defects: (1) The same batch of oil, repeatedly and repeatedly used for multiple batches of frying, will cause a certain degree of toxicity due to the high acid value of the oil and the decline in oil quality, resulting in the failure of the production process. Product quality cannot be guaranteed; (2) According to the proof of Maillard reaction, the structure of protein powder and amino acid in the product will eventually change, and the unstable content will gradually decrease (change in the range of 60%-40%), making protein powder and amino acid content reduction

(3) The production of browning pigments shows anti-oxidative properties on the automatic oxidation of oils, and the browning reaction produces reductive intermediate products such as aldehydes and ketones, resulting in the production of toxic substances

(4) High energy consumption during heating, resulting in high product cost

If the steaming method is used to obtain animal protein sources, although it is better than the frying method, the sewage discharge will pollute the environment, the taste is strong, and it does not meet the environmental protection requirements