Method for extracting glutamic acid from glutamic acid centrifugation mother liquid

Abstract

The invention discloses a method for extracting a glutamic acid from glutamic acid centrifugation mother liquid. The extraction method comprises the following steps of: (1) filtering the glutamic acid from glutamic acid centrifugation mother liquid by virtue of a membrane and removing thalluses to obtain a clarified glutamic acid mother liquid; (2) decoloring the glutamic acid mother liquid by using hybridization resins and eluting the resins to obtain eluant; and (3) evaporating, concentrating, crystallizing, centrifugally separating, washing and drying the obtained eluant to obtain a glutamic acid crystal. According to the method, most of glutamic acid is recovered from the glutamic acid centrifugation mother liquid, so that the yield of the glutamic acid is increased, and the economic benefit of factories is further improved; a majority of thalluses and proteins in the mother liquid are removed, and the recovered glutamic acid clear liquid can be directly utilized, so that the high workload in the other methods is reduced; addictive is not added and a changing process is not carried out, so that the denaturation of the glutamic acid is prevented; and moreover, wastewater is hardly generated in an organic ceramic membrane process, thus reducing wastewater treatment pressure.

Description

technical field [0001] The invention relates to a method for extracting glutamic acid from centrifuged mother liquor of glutamic acid, belonging to the technical field of fermented food industry. Background technique [0002] Glutamic acid is the precursor of monosodium glutamate, which is mainly obtained from starch or waste molasses through microbial fermentation and extraction. [0003] Glutamic acid is an acidic amino acid. The molecule contains two carboxyl groups, and its chemical name is α-aminoglutaric acid. Glutamic acid was discovered by Li Suxun in 1856. It is a colorless crystal with umami taste, slightly soluble in water, but soluble in hydrochloric acid solution, with an isoelectric point of 3.22. A large amount exists in cereal protein, and the content in animal brain is also more. Glutamic acid plays an important role in the protein metabolism process in organisms, and participates in many important chemical reactions in animals, plants and microo...

AI Technical Summary

Problems solved by technology

And still contain more glutamic acid in the centrifuged mother liquor, cause a large amount of wastes, so need a kind of method to reclaim the glutamic acid in the centrifuged mother liquor of glutamic acid

[0004] At present, most domestic monosodium glutamate production enterprises adopt the process of isoelectricity and then passing through ion exchange resin for centrifuged mother liquor when producing glutamic acid. At the electric point, although the solubility of glutamic acid is low, a part of glutamic acid is still dissolved in the liquid, so the yield of the process is relatively low, resulting in a large amount of waste of glutamic acid

In addition, when the mother liquor passes through the ion exchange resin, the mother liquor contains a large amount of impurities, which may easily cause pollution or even damage to the resin, so a new process is urgently needed to improve this deficiency.