Biological detoxification method of cottonseed meal

Abstract

The invention discloses a biological detoxification method of cottonseed meal, comprising: adding ferrous sulfate heptahydrate, 40,000-60,000 U / g of neutral xylanase, microorganism strains and the like into smashed cottonseed meal; after being evenly stirred, jointly acting for 4-5 days by microorganism and neutral xylanase at the temperature of 45-55 DEG C; and drying and smashing to obtain the product. The free gossypol content of the obtained product is lowered than the safety index specified by feed, the nutritional value thereof is higher than that of unleavened cottonseed meal, product protein content reaches 45-50%, free amino acid content is above 15%, and the cottonseed meal can be directly used as protein feed. The invention better solves the problems of incomplete detoxification of cottonseed meal, protein denaturation and secondary feed pollution due to adopting the chemical detoxification method in the prior art, and provides a non-toxic cottonseed meal production method which has favorable detoxification effect and low technical energy consumption and can reach feed standard requirements.

Description

technical field

[0001] The invention relates to a detoxification method for cotton meal, in particular to a biological detoxification method for cotton meal. Background technique

[0002] my country is a large cotton-producing country, which can provide about 6 million tons of cottonseed each year, and the total output of cottonseed cake (cotton meal) is about 3 million tons, accounting for about 30% of the output of various plant cakes. Cottonseed meal is a by-product of extracting cottonseed oil, and it is used as feed, which has the characteristics of protein feed and energy feed. The crude protein content of cottonseed cake is relatively high, reaching more than 34%, and the crude protein content of cottonseed cake can reach 41%-60%. Judging from the amino acid content of cottonseed meal, it has 8 essential amino acids, lysine is as high as 6%, and the content of cystine and tryptophan is relatively rich; the content of arginine is much higher than that of soybean meal,...