Glutamic acid extraction technology in production of glutamic acid by fermentation method

Abstract

A process for extracting glutaminic acid in the procedure of preparing glutaminic acid by fermenting method includes such steps as sterilizing the fermented liquid, ultrafiltration, regulating pH=3.2-3.25, crystallizing, separation, washing to obtain the crystal of glutaminic acid and mother liquid, desalting part of mother liquid, merging part of desalted mother liquid with said fermented liquid regulating pH value of the rest, evaporation concentrating, regulating pH value, crystallizing, separation and washing.

Description

technical field

[0001] The invention relates to a glutamic acid extraction process in the process of producing glutamic acid by fermentation, and belongs to the technical field of amino acid production by fermentation. Background technique

[0002] Glutamic acid is mainly used to manufacture monosodium glutamate. Fermentative manufacturing of glutamic acid is the most widely used method at home and abroad. The manufacturing process mainly includes: starch saccharification, seed cultivation, fermentation, extraction and other processes. There are many techniques for extracting glutamic acid from fermentation broth, but they are still developing. The main methods are:

[0003] 1. Extraction of glutamic acid by isoelectric point method

[0004] 2. Extraction of glutamic acid by ion exchange

[0005] 3. Zinc salt method to extract glutamic acid

[0006] 4. Extraction of glutamic acid by hydrochloride method

[0007] 5. Calcium salt method to extr...

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