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Method for treating salt-containing fermentation waste liquid by combining diffusion dialysis with electrodialysis

A technology of diffusion dialysis and fermentation waste liquid, applied in the field of amino acid fermentation, can solve the problem of high energy consumption of membrane pollution

Active Publication Date: 2021-06-25
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

[0008] In order to solve the problems of serious membrane pollution and high energy consumption in the treatment of saline fermentation waste liquid (such as glutamic acid and other electrodialysis) by bipolar membrane electrodialysis, the present invention provides a combination of diffusion dialysis and electrodialysis for the treatment of saline fermentation waste liquid The method, specifically utilizes the combination of anion-yang membrane diffusion dialysis and bipolar membrane electrodialysis or ordinary electrodialysis to process saline fermentation waste liquid, comprising the following steps:

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  • Method for treating salt-containing fermentation waste liquid by combining diffusion dialysis with electrodialysis
  • Method for treating salt-containing fermentation waste liquid by combining diffusion dialysis with electrodialysis
  • Method for treating salt-containing fermentation waste liquid by combining diffusion dialysis with electrodialysis

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Embodiment 1

[0053] The ammonium sulfate in the electric mother liquor such as glutamic acid is removed by using the operation mode of coupling anion-yang membrane diffusion dialysis and bipolar membrane electrodialysis described in the present invention. The diffusion dialysis device is a plate type, the size of the membrane stack is 100mm×200mm, and four TWDDA type diffusion dialysis negative membranes (Shandong Tianwei Membrane Technology Co., Ltd.) and 4 TWDDC (Shandong Tianwei Membrane Technology Co., Ltd.) diffusion dialysis positive membranes are used. The negative and positive membranes are arranged at intervals, and the structure of the membrane stack is as follows: figure 1 shown. The bipolar membrane electrodialyzer is plate type, the size of the membrane stack is 80mm×180mm, using 2 GeBM bipolar membranes (Beijing Tingrun Membrane Technology Development Co., Ltd.), 1 RXAM negative membrane (Hebei Yadeshi Environmental Protection Equipment Co., Ltd.) And 1 piece of SHCM positiv...

Embodiment 2

[0061] The ammonium sulfate in the electric mother liquor such as glutamic acid is removed by using the operation mode of coupling anion-yang membrane diffusion dialysis and ordinary electrodialysis described in the present invention. The diffusion dialyzer used is the same as in Example 1. Ordinary electrodialyzer is plate type, membrane stack size is 80mm×180mm, 1 RXAM negative membrane (Hebei Yadeshi Environmental Protection Equipment Co., Ltd.) and 2 SHCM positive membranes (Shanghai Xiangfeng Water Treatment Equipment Co., Ltd.), membrane stack structure Such as Figure 4 shown. Use titanium coated with ruthenium as the anode plate and stainless steel as the cathode plate. Diffusion dialysis and ordinary electrodialysis separators are all made of polypropylene, the separators are non-loop separators, and the separators are woven mesh.

[0062] Operation process see Figure 5 . Add 0.3L of glutamic acid isoelectric mother liquor containing glutamic acid 18g / L and ammo...

Embodiment 3

[0069] The ammonium sulfate in the lysine ionization waste liquid is removed by using the operation mode of coupling anion-cation membrane diffusion dialysis and bipolar membrane electrodialysis of the present invention. Diffusion dialysis coupled bipolar membrane electrodialysis equipment described in Example 1 was used.

[0070] Operation process see image 3 . Add 0.3 L of lysine separation waste liquid provided by Ningxia Yipin Biotechnology (the waste liquid remaining after ion exchange extraction of lysine, almost no lysine, containing ammonium sulfate 55g / L) into the No. 1 material tank, Add 0.3L of deionized water to material vat No. 2, initially add 0.3L of deionized water to No. 3 and No. 4 material vats, and initially add 0.3L of 30g / L sodium sulfate solution to No. 5 material vat.

[0071] Start the infusion pumps in chamber 1 and chamber 2 of the diffusion dialysis, so that the lysine ionized waste liquid and water flow through the diffusion chamber and the dial...

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Abstract

The invention discloses a method for treating a salt-containing fermentation waste liquid by combining diffusion dialysis with electrodialysis. The method comprises the following steps: 1) treating a salt-containing fermentation waste liquid by using anion and cation membrane diffusion dialysis, so that the inorganic salt in the salt-containing fermentation waste liquid permeates to the other side in a transmembrane manner to obtain an inorganic salt aqueous solution, and 2) treating the inorganic salt aqueous solution by bipolar membrane electrodialysis to obtain acid and alkali corresponding to the inorganic salt, or treating the inorganic salt aqueous solution by common electrodialysis to obtain a concentrated solution of the inorganic salt. According to the method, membrane pollution of bipolar membrane electrodialysis or common electrodialysis can be effectively controlled, the operation energy consumption is reduced, and the maintenance period is prolonged.

Description

technical field [0001] The invention belongs to the amino acid fermentation industry, and relates to a method for treating salt-containing fermentation waste liquid by diffusion dialysis combined with electrodialysis, which can effectively control the membrane pollution of bipolar membrane electrodialysis or common electrodialysis, reduce operating energy consumption, and prolong the maintenance period. Background technique [0002] For the production of amino acids by fermentation, acid or alkali needs to be added to meet the pH conditions of the process during fermentation and extraction, which leads to high salt content in the fermentation waste liquid after extraction of amino acids, and the salt concentration is generally 1-200g / L, which is Saline fermentation waste liquid. In addition to inorganic salts, unexhausted culture medium components, bacterial cells and their fragments, and impurities in industrial water all exist in the saline fermentation waste liquid. [0...

Claims

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Application Information

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IPC IPC(8): C02F1/469
CPCC02F1/4693
Inventor 王倩丛威魏允杨鹏波
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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