Method for preparing oligopeptide through mixed enzymolysis and fermentation of fish meal processing waste liquid and vegetable proteins

Abstract

The invention belongs to the technical field of microbial enzymatic and fermented feeds, and provides a method for preparing oligopeptide through the mixed enzymolysis and fermentation of fish meal processing waste liquid and vegetable proteins. According to the method, an enzymolysis method and a fermentation method are adopted, so that proteins can be fully degraded so as to obtain low molecular oligopeptide with relatively high content, and a delicious amino acid, oligopeptide, nucleotides and natural organic acids also can be produced, so that the palatability is obviously increased. In addition, according to the method provided by the invention, cottonseed meal and rapeseed meal are adopted for replacing part of soybean meal, so that the cost can be effectively saved, and thus the economic benefits are improved.

Description

Technical field [0001] The invention belongs to the technical field of microbial enzymatic hydrolysis and fermentation of feed, and relates to a method for preparing oligopeptides by mixed enzymatic hydrolysis and fermentation of freshwater fish meal processing waste liquid and plant protein. Background technique [0002] With the rapid development of the intensification of aquaculture, the demand for fishmeal has increased rapidly. However, the continuous deterioration of the environment and overfishing have led to a decline in global fishmeal production and high prices. High-quality feed proteins such as fishmeal have also become restrictions on animal husbandry and The bottleneck of the development of aquaculture industry. Fish meal processing technology is mostly wet. The process is characterized in that the raw materials are crushed-cooked-squeezed-dried to make fish meal. In the fish meal processing process, every 1 ton of fish meal produced can produce 3 to 3.5 tons of sq...

AI Technical Summary

Problems solved by technology

Patent CN200710168967.0 discloses a method for preparing functional feed protein enteric membrane protein powder. This method adopts a segmented liquid enzymatic hydrolysis method with multiple enzymes. This method pursues high-efficiency enzymatic hydrolysis, resulting in a relatively high content of free amino acids in the enzymatic hydrolysis product. However, the content of biologically active oligopeptides is relatively low, and the preparation steps are cumbersome and the subsequent drying consumes a lot of energy, which is not conducive to large-scale production.