Comprehensive utilization process of glutamic acid crystal mother liquid

A technology of crystallization mother liquor and glutamic acid, which is applied in the fields of application, preparation of organic compounds, animal feed, etc., can solve the problems of environmental protection pressure reduction, low extraction yield, high production cost, etc., achieve efficiency improvement, increase adsorption capacity, reduce The effect of water usage

Inactive Publication Date: 2014-07-16
SHANGHAI KAIXIN ISOLATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 pr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1: Concentrate 200L of isoelectric glutamic acid crystallization mother liquor, pour it into a circulation tank, and transport it into the membrane group through a pump, with a feed pressure of 7kg / m 2 , Membrane pressure 3kg / m 2 , keep the membrane surface velocity at 4 m / s. Glutamic acid and small molecular substances pass through the membrane and enter the filtrate side for collection. Macromolecular substances, bacteria and other solid particles are intercepted. The filtrate directly enters the separation system for glutamic acid extraction and purification. The intercepted concentrated solution is dried to obtain bacterial protein, which is used as a feed additive.

Example Embodiment

[0031] Example 2

[0032] Concentrate glutamic acid isoelectric crystallization mother liquor, and obtain filtrate 4L after filtering through 100nm membrane, wherein glutamic acid content is about 2.0%. Adjust the pH to 1.7 and enter the resin column. The volume of the resin column is 1.3L, and the gel-type strong acid resin is used. When the pH in the effluent no longer changes and the concentration of glutamic acid remains unchanged, the elution begins.

[0033] The eluent is prepared with ammonia water and ammonium sulfate to pH9.1, and the elution starts. The front flow, high flow and back flow were collected according to the difference of pH and glutamic acid content. Among them, the front part has a lower pH and a lower content of glutamic acid, which is merged into the crystallization mother liquor and adsorbed again. The high flow part is directly concentrated, and the low temperature is directly crystallized. The latter part is used as the preparation of the next...

Example Embodiment

[0034] Example 3

[0035] After membrane separation, the glutamic acid crystallization mother liquor is adjusted to pH 1.7, and then enters resin columns A, B, and C connected in series for adsorption. Among them, the feed liquid enters the A column first, enters the B column after flowing out, and enters the C column after flowing out from the B column.

[0036] When the adsorption of column A is saturated, that is, when the concentration of glutamic acid entering and exiting column A remains unchanged, the feed starts from column B and continues to adsorb, and then enters column C and column D in sequence. Column A begins to elute. After the elution of the A column is completed and B is saturated, the B column starts to elute. Column A is connected after column D, and column C operates as the first adsorption column at this time. The analysis process is the same as in Example 2.

[0037] The invention combines membrane separation technology and ion exchange technology to...

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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 ...

Claims

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Application Information

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IPC IPC(8): A23K1/00C05F7/00C07C229/24C07C227/40A23K20/142A23K20/147
CPCY02A40/20
Inventor 邵蔚申雅维葛文越曹厚康
Owner SHANGHAI KAIXIN ISOLATION TECH CO LTD
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