Preparation method of feather fermentation protein feed

Abstract

The invention discloses a preparation method of a feather fermentation protein feed. The preparation method is characterized by comprising the following steps of adding each kilo of feather into 20 to 30l of inorganic salt culture medium for mixing, sterilizing at the temperature of 115 to 121DEG C for 15 to 20 minutes, and cooling to room temperature; inoculating a bacillus licheniformis seed solution into the inorganic salt culture medium in which the feather is added according to the volume ratio of 3 to 5 percent; introducing 0.15 to 0.18 cubic meter of sterile air into each cubic meter of solution in each minute for ventilating and fermenting at the fermentation temperature of 30 to 37DEG C until the feather is completely dissolved; performing filtering and impurity removal on fermentation liquor, then adding maize flour with the mass percent of 6 to 7 percent and bran with the mass percent of 4 to 5 percent into filtrate, uniformly mixing, drying and granulating to obtain the feather fermentation protein feed. According to the method disclosed by the invention, the content of soluble protein in the fermentation liquor reaches 31.4 to 34.3g/L; for the fermentation protein feed prepared from the maize flour, the bran and flour serving as auxiliary materials, the mass percent of crude protein reaches 28.6 to 29.5 percent, and the protein digestibility in vitro reaches 89.5 to 92.4 percent. The protein feed prepared by the method disclosed by the invention has natural maize and wheat fragrance, is good in palatability, and is conductive to digesting and promoting the growth.

Description

technical field [0001] The invention belongs to the technical field of preparation of microbial fermented protein feed, and in particular relates to a preparation method of feather fermented protein feed. technical background [0002] The feathers of birds are mainly composed of protein. Although the quality of different feathers is slightly different, the types of amino acids that make up feather proteins are the same. The world's annual feather production can reach hundreds of millions of tons, and it is still increasing year by year. Large-scale poultry farming in my country produces a large amount of keratin waste, especially feather waste. Poultry feathers contain a large amount of potentially useful proteins and amino acids. The protein content of poultry feather stems is over 85%, of which about 80% is keratin, which is an insoluble protein with a fibrous structure, high stability, good elasticity, and swelling It is small in nature, completely insoluble in water, s...

AI Technical Summary

Problems solved by technology

However, this method also has the disadvantages of high energy consumption and protein denaturation under high pressure.

[0009] In summary, due to the current existing methods of processing feathers into feather protein powder, there are problems such as high cost, low efficiency, high energy consumption, large pollution, residual chemical reagents, destruction of certain nutrients