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Method for separating glutamic acid and lactic acid from fermentation waste liquor by packed bed electrodialysis

A technology of packed bed electrodialysis and fermentation waste liquid, applied in electrodialysis, chemical instruments and methods, separation/purification of carboxylic acid compounds, etc., can solve the problems of lack of effective methods, etc., and achieve the effect of promoting engineering application

Active Publication Date: 2014-12-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0028] Aiming at the lack of effective methods for the separation and extraction of glutamic acid and lactic acid in fermentation waste liquid, the present invention intends to develop a method for the separation of these two components of fermentation waste liquid by packed bed electrodialysis, so as to realize the recovery of valuable ingredients, promote the recycling of fermentation waste liquid and reduce environmental pollution

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  • Method for separating glutamic acid and lactic acid from fermentation waste liquor by packed bed electrodialysis
  • Method for separating glutamic acid and lactic acid from fermentation waste liquor by packed bed electrodialysis

Examples

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Embodiment 1

[0070] Example 1 Conventional electrodialysis is used for the separation of glutamic acid and lactic acid in fermentation waste liquid

[0071] Firstly, conventional electrodialysis was used to separate glutamic acid and lactic acid in fermentation waste liquid. The conventional electrodialysis desalination membrane stack has 3 positive membranes, and 2 negative membranes are alternately arranged between the cathode and anode plates, forming 2 concentrated chambers and 2 dilute chambers. The separator between the membranes is a double-layer woven mesh separator, and the thickness of each compartment is 0.9mm. The anode plate is made of titanium coated with ruthenium, and the cathode plate is made of stainless steel; operating conditions: the dilute chamber is 2g / L L-lac- and L-glu-mixture, the circulation flow rate is 50L / h; the concentrated chamber is 50mg / L Na 2 SO-4, 0.1% Na in the pole chamber 2 SO 4 , the circulation flow rate is 40L / h, the solution in each chamber is ...

Embodiment 2

[0073] Example 2 Packed bed electrodialysis is used for the separation of glutamic acid and lactic acid in fermentation waste liquid

[0074] Compared with conventional electrodialysis, the separator of packed bed electrodialysis dilute room is about 5mm thick, without woven mesh in the middle, and is used to fill different types of ion exchange resins. Other components and operating conditions are the same as conventional electrodialysis. Adopt packed bed electrodialysis device of the present invention, investigate inert resin, ion exchange resin such as 201*7 (strong base type), 001*1.1 (strong acid type), WK10 (weak acid type), WA30 (weak base type) etc. The effect of the separation of glutamic acid and lactic acid in waste liquid, the first two are from the chemical plant of Nankai University, and the latter two are from Mitsubishi, Japan.

[0075] When filling inert resin: Since the inert resin has no ion exchange groups, in this electrodialysis system, the transmembrane ...

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Abstract

The invention relates to a method for separating glutamic acid and lactic acid from fermentation waste liquor by packed bed electrodialysis. The selectivity of an ion exchange resin packed in the light chamber of a packed bed electrodialysis membrane pile in a packed bed electrodialyzer is combined with the control on the pH value of the light chamber solution, so that the component to be separated firstly generates transfer and inter-membrane migration through the resin chain under the action of an electric field, thereby selectively separating the glutamic acid and lactic acid from the fermentation waste liquor. The packed bed electrodialyzer comprises a packed bed electrodialysis membrane pile, a liquid delivery pump (9), a flowmeter (10), a pressure meter (11), a temperature sensor (12), an on-line pH meter (13), an automatic acid or alkali feeder, a connecting pipeline and a liquid storage tank. The invention can solve the problem of low separation ratio in the conventional electrodialysis, and the problem that the ion exchange method needs batch operation and generates abundant acid / alkali waste liquor, and promotes the engineering application of new technology for separating glutamic acid and lactic acid from fermentation waste liquor.

Description

technical field [0001] The invention relates to the field of fermentation product separation technology, in particular, the invention relates to a method for separating residual glutamic acid and lactic acid in fermentation waste liquid, wherein the packed bed electrodialysis membrane desalination chamber is filled with screened ion exchange resin for Facilitates the selective separation of glutamate and lactic acid. Background technique [0002] The fermentation waste liquid after the glutamic acid fermentation broth is frozen-isoelectric precipitation to extract glutamic acid also contains abundant available resources, except (NH 4 ) 2 SO 4 In addition to other inorganic salts, it also contains 1.5-2% of organic components such as glutamic acid and a small amount of lactic acid. If it is directly discharged, it will cause serious waste of resources and environmental pollution. Discussing the separation and extraction of glutamic acid and lactic acid in fermentation wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/44B01D61/46B01D61/54C07C229/24C07C227/40C07C59/08C07C51/47
Inventor 石绍渊曹宏斌张晓琴王汝南
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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