Method for filtering and clarifying citric acid fermentation broth

A technology of citric acid fermentation liquid and filtrate, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve the problems of poor turbidity of fermentation liquid, high protein colloid content, etc., and achieve good yield, product quality, and process flow Concise and clear effect

Active Publication Date: 2011-11-23
RIZHAO JINHE BOYUAN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing problems, the present invention proposes a method for filtering and clarifying citric acid fermented liquid. By adopting this method, the

Method used

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  • Method for filtering and clarifying citric acid fermentation broth
  • Method for filtering and clarifying citric acid fermentation broth
  • Method for filtering and clarifying citric acid fermentation broth

Examples

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Embodiment 1

[0034] A method for filtering and clarifying citric acid fermented liquid, comprising the following steps:

[0035] 1. Add the flocculant polyacrylamide to the citric acid fermentation broth and stir evenly, the addition ratio is 0.1g / m 3 ;

[0036] 2. Add filter aid phosphate rock powder to the citric acid fermentation broth and stir evenly, the addition ratio is 1.0kg / m 3 ;

[0037] 3. The above-mentioned mixed solution is subjected to first-level solid-liquid separation with a plate and frame filter press;

[0038] 4. Add flocculant polyaluminum chloride to the filtered filtrate again and stir evenly, the addition ratio is 0.3g / m 3 ;

[0039] 5. Add filter aid diatomite to the filtered filtrate again and stir evenly, the addition ratio is 0.5kg / m 3 ;

[0040] 6. The above mixed solution was subjected to secondary solid-liquid separation with a plate and frame filter press, and the turbidity of the obtained fermentation filtrate was 3.27.

Embodiment 2

[0042] A method for filtering and clarifying citric acid fermented liquid, comprising the following steps:

[0043] 1. Add the flocculant sodium polyacrylate to the citric acid fermentation broth and stir evenly, the addition ratio is 2.0g / m 3 ;

[0044] 2. Add filter aid calcium sulfate to the citric acid fermentation broth and stir evenly, the addition ratio is 0.5kg / m 3 ;

[0045] 3. The above-mentioned mixed solution is subjected to first-level solid-liquid separation with a plate and frame filter press;

[0046] 4. Add flocculant polyaluminum sulfate to the filtered filtrate again and stir evenly, the addition ratio is 0.1g / m 3 ;

[0047] 5. Add filter aid perlite to the filtered filtrate again and stir evenly, the addition ratio is 1.0kg / m 3 ;

[0048] 6. The above mixed solution was subjected to secondary solid-liquid separation with a plate and frame filter press, and the turbidity of the obtained fermentation filtrate was 3.52.

Embodiment 3

[0050] A method for filtering and clarifying citric acid fermented liquid, comprising the following steps:

[0051] 1. Add the flocculant polyacrylamide to the citric acid fermentation broth and stir evenly, the addition ratio is 1.0g / m 3 ;

[0052] 2. Add filter aid phosphate rock powder to the citric acid fermentation broth and stir evenly, the addition ratio is 0.1kg / m 3 ;

[0053] 3. The above-mentioned mixed solution is subjected to first-level solid-liquid separation with a plate and frame filter press;

[0054] 4. Add flocculant polyaluminum chloride to the filtered filtrate again and stir evenly. The addition ratio is 0.7g / m 3 ;

[0055] 5. Add filter aid diatomite to the filtered filtrate again and stir evenly, the addition ratio is 2.0kg / m 3 ;

[0056] 6. The above mixed solution is subjected to secondary solid-liquid separation with a plate and frame filter press, and the obtained fermentation filtrate has a turbidity of 4.45.

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Abstract

The invention relates to a method for filtering and clarifying a citric acid fermentation broth. The method is characterized by the steps that: before the citric acid fermentation broth is processed, various flocculating agents and filter aids are added to feed liquid; filtering is then carried out, such that the clarified fermentation broth with a turbidity lower than 5 is obtained. With the method provided by the invention, quality of the fermentation broth is substantially improved. Not only the turbidity of the fermentation broth is substantially reduced, but the contents of internal colloids, proteins and other impurities in the fermentation broth are also reduced. Therefore, a burden on post extraction is greatly reduced.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to a method for filtering and clarifying citric acid fermentation liquid. Background technique [0002] Citric acid is the largest acid among organic acids. Due to its physical, chemical and derivative properties, it is widely used in food, medicine, daily chemical and other industries. In industrial production, citric acid is mainly made from starchy substances such as corn and cassava through submerged fermentation. After the fermentation, a large amount of citric acid fermented mash will be obtained, which contains many impurities, such as mycelium, protein, colloid, pigment, etc. If it is not purified and filtered, it will be difficult to directly enter the post-extraction section. At present, the general practice is to carry out the primary filtration and secondary filtration of the fermented mash, and then transport the obtained supernatant to the post-extraction section. ...

Claims

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Application Information

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IPC IPC(8): C07C59/265C07C51/42
Inventor 寇光智刘剑雄于海彬高晓彤黄金峰
Owner RIZHAO JINHE BOYUAN BIOCHEM
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