Process of separating and extracting succinic acid from anaerobic fermented liquid

An anaerobic fermentation broth and anaerobic fermentation technology, applied in the field of separation and extraction of succinic acid, can solve the problems of resin pollution, long process route and high operating cost, improve yield and product quality, overcome cumbersome steps, and reduce production costs. cost reduction effect

Inactive Publication Date: 2007-01-03
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Due to the need to add a large amount of calcium and magnesium salts during the fermentation process to control the normal progress of the fermentation, the high content of ionic substances accelerates the saturation of the resin, increases the number of regenerations of the resin, and causes problems such as a large amount of sewage discharge.
[0011] The calcium salt method is not suitable for ion exchange treatment due to the high salt content in the fermentation liquid, serious resin pollution, and difficult regeneration. In addition, a large amount of solid and slurry needs to be processed, and a large amount of gypsum waste residue pollution is generated, and the acid-base consumption is large.
Using electrodialysis, the route is long, the energy consumption is high, and the treatment of impurity ions has great limitations, the investment in equipment is large, and the operation is difficult
The s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Dilute the succinic acid fermentation broth produced by anaerobic fermentation to 1.25 times the original volume with water to 10L, adjust the pH of the fermentation broth to acidity, and filter through a 0.2μm microfiltration membrane to remove bacteria and particle impurities. The temperature is 0.05MPa, the temperature is 35°C, the concentration factor is 20 times, and the amount of dialyzed water is 3L, accounting for 30% of the volume of the diluted fermentation broth. The microfiltrate is cross-flow filtered through an ultrafiltration membrane with a cut-off molecular weight of 8000, the operating pressure is 0.1MPa, the operating temperature is 20°C, the concentration factor is 40 times, and the dialyzed water volume is 1L, accounting for 8.3% of the volume of the microfiltrate. Add 0.4% (this ratio is the mass volume ratio of activated carbon to ultrafiltrate, i.e. activated carbon is 0.4g in every 100ml ultrafiltrate, the same below) activated carbon in the ultr...

Embodiment 2

[0045] Dilute the succinic acid fermentation broth produced by anaerobic fermentation to 1.5 times the original volume with water to 10L, adjust the pH of the fermentation broth to acidity, and cross-flow filter through a 0.1μm microfiltration membrane to remove bacteria and particulate impurities. The temperature is 0.05MPa, the temperature is 35°C, the concentration factor is 20 times, and the amount of dialyzed water is 2L, accounting for 20% of the volume of the diluted fermentation broth. The microfiltrate is cross-flow filtered through an ultrafiltration membrane with a cut-off molecular weight of 10,000. The operating pressure is 0.2 MPa, the operating temperature is 35° C., the concentration factor is 40 times, and the dialyzed water volume is 1 L, accounting for 9.1% of the volume of the microfiltrate. Add 0.35% activated carbon to the ultrafiltrate, decolorize for 30 minutes at a stirring speed of 200 rpm, and decolorize at a temperature of 50°C, press filter, add 1L ...

Embodiment 3

[0048] Dilute the succinic acid fermentation broth produced by anaerobic fermentation to 1.75 times the original volume to 17.5L, adjust the pH of the fermentation broth to acidity, and filter through a 0.3μm microfiltration membrane to remove bacteria and particle impurities. The pressure is 0.1MPa, the temperature is 20°C, the concentration factor is 20 times, and the dialyzed water volume is 5L, accounting for 28.6% of the volume of the diluted fermentation broth. The microfiltrate is cross-flow filtered through an ultrafiltration membrane with a cut-off molecular weight of 8000. The operating pressure is 0.4 MPa, the operating temperature is 20° C., the concentration factor is 40 times, and the dialyzed water volume is 2 L, accounting for 9.5% of the volume of the microfiltrate. Add 0.3% activated carbon to the ultrafiltrate, decolorize for 30 minutes at a stirring speed of 200 rpm, and decolorize at a temperature of 40° C., press filter, add 2L of pure water (accounting fo...

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Abstract

The present invention discloses process of separating and extracting succinic acid from anaerobic fermented liquid. The process includes filtering the fermented liquid of succinic acid with microfiltering membrane, filtering with ultrafiltering membrane, decolorizing and depurating with active carbon to obtain clarified succinic acid solution, concentrating, and crystallizing to obtain succinic acid product. The process has the features of mild condition, simple operation, short separating path, low cost, high selectivity and high product quality.

Description

technical field [0001] The invention relates to a method for separating and extracting succinic acid, in particular to a method for separating and extracting succinic acid from a fermented liquid prepared by anaerobic fermentation using membrane separation, activated carbon decolorization and crystallization techniques. Background technique [0002] Succinic acid (Succinic Acid, Butanedioic Acid), also known as succinic acid, is a dibasic organic acid, which is an important C 4 Platform compounds, which can be used as intermediates in the synthesis of complex organic compounds, are widely used in pharmaceuticals, food processing, synthetic plastics, rubber, protective coatings, dyes and other industries. [0003] There are two main methods for the preparation of succinic acid, one is produced by petrochemical method, and the other is produced by microbial fermentation method. Due to the cost and environmental pollution of the traditional petrochemical succinic acid, the pro...

Claims

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Application Information

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IPC IPC(8): C07C55/10C07C51/43C07C51/48
Inventor 姚忠吴昊刘辉李松姜岷
Owner NANJING UNIV OF TECH
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