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Method for removing inorganic salt in L-alanine fermented material liquid

A kind of technology of alanine and fermented material, applied in the field of purification, can solve the problems affecting the extraction and refining process, affecting the purity and quality of products, etc., and achieve the effect of simple and easy process control and lightening the burden

Active Publication Date: 2017-05-10
QINHUANGDAO HUAHENG BIOENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A problem currently existing is that a small amount of inorganic salts in the fermentation broth, such as ammonium salts, phosphate salts, calcium salts and magnesium salts, will directly affect the subsequent extraction and refining process, thereby affecting the purity and quality of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 200L of L-alanine fermentation broth was ultrafiltered through a ceramic membrane with a molecular weight cut-off of 100,000Da to obtain L-alanine ultrafiltrate. The specific process conditions are: the operating pressure of ultrafiltration is 0.15-0.80MPa, preferably 0.30-0.60MPa, and the operating temperature is 10-60°C, preferably 30-60°C. The initial pH of L-alanine fermentation serum is 6.88, the conductivity is 18643 μS / cm, the content of L-alanine is 13.48%, the content of ammonium salt is 4029 mg / L, the content of phosphate is 2166 mg / L, and the content of calcium salt is 1342 mg / L, the magnesium salt content is 1581mg / L.

[0035] Take 20L of L-alanine ultrafiltrate as a desalination solution and inject it into the fresh water chamber, and the initial solution in the concentrated water chamber is 15L of 0.05% Na 2 SO 4 Solution, the initial solution of the pole water chamber is 10L 2%Na 2 SO 4solution. Start the concentrated water pump, fresh water pump an...

Embodiment 2

[0038] 1000L of L-alanine fermentation broth is ultrafiltered through a ceramic membrane with a molecular weight cut-off of 100,000Da to obtain L-alanine ultrafiltrate. The specific process conditions are: the operating pressure of ultrafiltration is 0.15-0.80 MPa, preferably 0.30-0.60 MPa, and the operating temperature is 10-680°C, preferably 30-60°C. The initial pH of the L-alanine ultrafiltrate is 6.53, the conductivity is 24320 μS / cm, the content of L-alanine is 17.43%, the content of ammonium salt is 4722 mg / L, the content of phosphate is 2873 mg / L, and the content of calcium salt is 2167mg / L, magnesium salt content is 2353mg / L.

[0039] Take 80L L-alanine ultrafiltrate as the desalination solution, and the initial solution of the concentrated chamber is 100L 0.03% Na 2 SO 4 Solution, the initial solution of the pole chamber is 50L 1.6%Na 2 SO 4 solution. Start the concentrated water pump, fresh water pump and polar water pump, adjust the concentrated and fresh water...

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Abstract

The invention discloses a method for removing inorganic salt in L-alanine fermented material liquid. The method comprises the steps that the L-alanine fermented material liquid is filtered; thalli and macromolecular protein in the fermented liquid are removed; L-alanine ultrafiltration clear liquid is obtained; the respective water injection flow rate of a fresh water pump, a concentrated water pump and an electrode water pump is controlled, so that the pressure balance in a fresh water chamber, a concentrated water chamber and an electrode water chamber is ensured; the L-alanine ultrafiltration clear liquid is subjected to electrodialytic treatment under the constant current density condition until the membrane pack voltage is stabilized to be 30 to 50V; the electrical conductivity of L-alanine fermented clear liquid is 3000 to 10000 muS / cm; when the L-alanine loss rate is 8 to 12 percent, the electrodialysis is finished. The method has the advantages that the electrodialysis is used for treating material liquid in the process of producing L-alanine by a fermentation method; saline matters such as ammonium salt, phosphate, calcium salt and magnesium salt can be effectively removed, so that the purity and the quality of L-alanine products are improved.

Description

technical field [0001] The invention relates to the technical field of purification methods, in particular to a method for removing inorganic salts in L-alanine fermentation feed liquid by electrodialysis. Background technique [0002] The electrodialysis process is a combination of electrochemical process and dialysis diffusion process, and is a relatively mature technology in the separation process. Electrodialysis is under the action of an external DC electric field, with the potential difference as the driving force, using the selective permeability of the ion exchange membrane (that is, cations can pass through the cation exchange membrane, and anions can pass through the anion exchange membrane), so that the anions in the water , cations do directional movement (anions and cations move to the anode and cathode respectively) so as to achieve the purpose of product desalination, concentration, refining or purification. At present, it plays an important role in various n...

Claims

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Application Information

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IPC IPC(8): C07C227/40C07C229/08
CPCC07C227/40C07C229/08
Inventor 刘洋唐思青
Owner QINHUANGDAO HUAHENG BIOENG CO LTD
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