Extraction process for preparing nisin

Abstract

The invention relates to an extraction process for preparing nisin, and solves the problems of low yield, high unit cost, and influence on product quality and harm to human bodies because an organic solvent is generally adopted for extraction or elution in the conventional extraction process of the nisin. A method comprises the following steps of: 1, pouring fermentation liquor into an acidifyingtank for acidifying and analyzing to obtain acidified liquid; 2, pouring the acidified liquid into an aeration tank for aeration, filtering to enter a receiver and concentrating the fermentation liquor; 3, pumping the concentrated fermentation liquor into an organic membrane for filtering to obtain high-purity concentrated fermentation liquor; and 4, diluting the high-purity fermentation liquor, adding edible salt and drying. The aeration is taken as the core of the extraction process; the process is simple and direct; process loss and energy consumption are reduced; the yield is 70 to 80 percent; the energy cost is reduced by 30 percent; and the organic solvent is not used, and substances harmful to the human bodies and environment do not exist.

Description

technical field [0001] The invention relates to an extraction process for preparing coccin. Background technique [0002] Nisin (NISIN) can inhibit and kill Galanz-positive bacteria and their spores. As an organic polypeptide, it can be degraded by the human body. As a biological preservative, it has begun to enter the food processing industry. On January 19, 1990, the Food Supervision Office of the Ministry of Health of my country issued a certificate for the use of Nisin as a food preservative. On March 29, 1990, Nisin was included in the 1990 supplementary variety of the international GB2760-86, and the quality standard was stipulated. [0003] At present, the manufacturers of nisin mainly use resin exchange, membrane filtration and other technologies for extraction, but due to the high price of raw materials used, the complex process, low yield and high unit cost, organic solvent extraction or elution is generally used , which affects the product quality and is toxic to...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low yield and high unit cost in the existing nisin extraction process, and the general use of organic solvents for extraction or elution, which affects the product quality and is toxic to the human body, and provides A kind of extraction process for preparing nisin