Biological detoxification technology for rape-seed meal

Abstract

The invention provides a new method for detoxifying a rape-seed meal by fermenting saccharomycetes and lactic acid bacteria together. The rape-seed meal has been taken as a feed additive for a long time, but the rape-seed meal cannot be used before being detoxified because the rape-seed meal contains constituents, such as glucosinolate and the like, which are harmful to livestock. Microbial fermentation is a novel detoxification method in conventional rape-seed meal detoxification technology and can overcome the defects of small detoxification range, low detoxification rate, poor palatability of detoxified rape-seed meal and the like in physical and chemical detoxification methods. In the invention, glucosinolate in the rape-seed meal is removed by fermenting saccharomycetes and lactic acid bacteria together; after saccharomycetes and lactic acid bacteria are fermented together in a ratio of 1:1 for 3 to 7 days, the detoxification rate can reach about 60 percent, glucosinolate content can be lowered to about 0.15 percent and protein content of the rape-seed meal is remarkably increased due to microbial fermentation.

Description

1. Technical field [0001] The invention utilizes the microbial fermentation method to detoxify the rapeseed cake. 2. Background technology [0002] Rapeseed is one of the main oil crops both in China and in the world. In my country, the output accounts for a quarter of the output of vegetable oil products. China's annual output of rapeseed is more than 8 million tons, ranking first in the world. Rapeseed cake after oil extraction from rapeseed generally accounts for about 60% of the raw material. The huge rapeseed output makes my country have abundant rapeseed cake resources. Rapeseed cake is rich in protein, and its protein content is generally between 30% and 40%, and the highest can reach more than 47%. The amino acid composition of rapeseed protein is reasonable, its lysine content is equivalent to that of soybean, and the content of sulfur-containing amino acids such as lysine and methionine is higher than that of soybean protein. It is the largest high-quality feed p...

AI Technical Summary

Problems solved by technology

At present, the more mature methods in the world generally include physical and chemical methods, but the detoxification range of physical and chemical detoxification methods is small, the detoxification rate is low, and the palatability of rapeseed cake after detoxification is poor, so the detoxification effect Not ideal, and these methods have relatively large damage to the active ingredients in the rapeseed cake, or the residue is serious, or the process is more complicated and the cost is higher, all of which have certain shortcomings