Soybean meal fermentation process

Abstract

The invention relates to a soybean meal fermentation process in the technical field of vegetable protein fermentation, which mainly comprises the following steps: raw material clearing, mixed inoculation, fermentation, puffing, drying, cooling, crushing, screening and finished product packaging. The invention is mainly characterized in that materials are fermented in a fermentation cabin so as toensure the temperature and humidity environment for the fermentation of the materials, the materials are provided with air at regular times and are stirred in the fermentation process so as to ensurethe materials to be fermented uniformly, and simultaneously follow-up treatments such as puffing, vacuum drying, cooling and the like are increased in the fermentation process to further prevent nutrient components in the fermented materials from being damaged. In addition, the materials are fermented by a multi-microorganism compound bacterial liquid, the fermentation time can be shortened through the multi-microorganism synergistic effect, the materials fermented by the process disclosed by the invention have uniform quality and high nutritional value, feed absorption rate of animals is increased, and the materials are convenient to store.

Description

technical field [0001] The invention relates to plant protein fermentation technology, in particular to a soybean meal fermentation technology. Background technique [0002] In my country, animal protein for feed is relatively scarce, and most of it depends on imports. Feeding animal protein is not only expensive, but also long-term consumption of animal protein feed such as fish meal and bone meal can easily cause animal infectious diseases. Moreover, many countries have banned the addition of animal proteins such as fish meal and bone meal in animal feed. For this reason, people have begun to pay attention to alternative plant-based proteins. [0003] Soybean meal is the remaining by-product after soybean oil is extracted. It is widely used in the feed industry because it is rich in protein, essential amino acids and various mineral nutrients. However, during the oil extraction process, the obtained soybean meal is often subjected to high temperature treatment, resultin...

AI Technical Summary

Problems solved by technology

[0006] (1) Cement tanks are used for soybean meal fermentation. It is difficult to control the temperature of the material during the fermentation process. Even if it is equipped with turning equipment, it will be unevenly turned over, resulting in inconsistent fermentation degrees and uneven fermentation quality of materials at different positions. The nutritional content of animals after eating The absorption rate of fermented products will be reduced, and the ambient temperature and humidity will also change with the seasons, which has a great impact on the quality stability of fermented products;

[0007] (2) The material after fermentation is relatively viscous, and it is easy to agglomerate or block. It is difficult to completely disperse the viscous and agglomerated material by using an ordinary dispersing device. In this way, in the subsequent drying process, the moisture inside the agglomerated material It can’t be fully developed, and the surface material is scorched and gelatinized due to over-drying, which directly affects the quality of the finished product after fermentation. The less thoroughly the dispersion is, the more serious this phenomenon will be;

[0008] (3) The current drying equipment mostly adopts the airflow type (vibration fluidized bed, pulse fluidized bed, etc.), the drying temperature is relatively high, generally at 180-200 ° C, and the drying time is relatively long, so that the fermentation of the material The beneficial microorganisms, heat-sensitive substances and nutrients have great destructive power;

[0009] (4) In the existing fermentation process, there is no timely and effective cooling of the dried materials. On the one hand, the crushing efficiency is low. On the other hand, after the materials are crushed and packed, agglomeration still occurs in the packaging bag , which affects the quality and shelf life of the material