Comprehensive utilization process of glutamic acid crystal mother liquid

Abstract

A comprehensive utilization process of a glutamic acid crystal mother liquid comprises the following steps: one, leading the glutamic acid crystal mother liquid into a membrane separation system, allowing solid particles, thalli, proteins, polysaccharides and a colloid in the mother liquid to be intercepted by a membrane, and making glutamic acid left in a membrane filtrate; and allowing the membrane filtrate to go to a next step for treatment; two, leading the membrane filtrate into an ion exchange system, adsorbing glutamic acid by an ion exchange resin, when the content of glutamic acid in an ion exchange tail liquid is not more than 0.2%, stopping column-loading, adding an eluting agent, eluting, allowing glutamic acid to go into the eluate, collecting the eluate, and recycling glutamic acid from the eluate. The membrane separation technology and the ion exchange technology are combined, recycling of glutamic acid from the crystal mother liquid is realized, at the same time, a protein feed is prepared from the thalli and the proteins intercepted by the membrane, an organic fertilizer is prepared from the ion exchange tail liquid through slurry-spraying granulation, the whole process allows useful substances in the crystal mother liquid to be totally recycled, comprehensive utilization of the resources is thoroughly achieved, waste is turned into treasure, and significant economic benefits are achieved.

Description

technical field [0001] The invention relates to the treatment of three wastes, in particular to a process for comprehensive utilization of glutamic acid crystallization mother liquor. Background technique [0002] China is a big country of MSG. The annual output of MSG in China is more than 1.6 million tons. With the improvement of people's living standards, the consumption and output of monosodium glutamate are still increasing year by year. As monosodium glutamate is monosodium glutamate. Its raw material is glutamic acid. The production of glutamic acid is obtained through microbial fermentation from glucose, corn steep liquor, ammonia water and other organic and inorganic components. In the production process of glutamic acid, a large amount of high-concentration organic wastewater is produced, which is difficult to treat and brings a serious burden to the enterprise. Therefore, the optimization of glutamic acid extraction process, how to reduce cost, reduce energy ...

AI Technical Summary

Problems solved by technology

The advantages of this process: the consumption of water and chemicals is greatly reduced, and the pressure on environmental protection is reduced; the disadvantages: low extraction yield and high production cost

However, because the yield of concentrated isoelectric extraction is 7-10% lower than that of isoelectric ionization exchange process, the promotion of this process is greatly restricted.