A method for pretreatment of fermentation broth coupled with flocculation and adsorption

A fermented liquid and pretreatment technology, applied in the direction of flocculation/sedimentation water/sewage treatment, filtration treatment, water/sewage treatment, etc., can solve the problems of ineffective removal of soluble impurities, increased difficulty of separation and purification, low applicability of acid and alkali, etc. , to achieve the effect of improving filter aid effect, reducing decolorization cost and improving yield

Active Publication Date: 2022-04-15
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problems that the existing flocculation pretreatment technology has low applicability to acid and alkali, small flocs, difficult to filter, a large amount of filter aids need to be added, and some soluble impurities in the fermentation broth cannot be effectively removed, which increases the difficulty of subsequent separation and purification. , and provides a fermentation broth pretreatment method coupled with flocculation adsorption

Method used

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Comparison scheme
Effect test

specific Embodiment approach 1

[0078] Specific embodiment one: a kind of fermented liquid pretreatment method coupling flocculation adsorption of this embodiment is carried out according to the following steps:

[0079] 1. Preparation of inorganic polymer flocculation solution: Add 12.07g of aluminum chloride hexahydrate into distilled water and set the volume to 200mL to obtain a 0.25mol / L aluminum chloride hexahydrate solution. Stir magnetically at 30°C and 180rpm until completely dissolved. Continue to drop 200mL of 2mol / L NaOH solution at a rate of 0.5mL / min under magnetic stirring to adjust the alkalinity (B value) to 1mol / L, then mature for 1d, and set the volume to 500mL to obtain a 0.1mol / L PAC solution , that is, the inorganic polymer flocculation solution;

[0080] 2. Preparation of cross-linked organic polymer flocculation solution: ① Dissolve 2 g of chitosan in 1 L of acetic acid solution with a volume fraction of 1%, stir magnetically at 180 rpm for 1 h until completely dissolved, and obtain a ...

specific Embodiment approach 2

[0086] Specific embodiment two: a kind of fermented liquid pretreatment method coupling flocculation adsorption of this embodiment is carried out according to the following steps:

[0087] 1. Preparation of inorganic polymer flocculation solution: Add 12.07g of aluminum chloride hexahydrate into distilled water and set the volume to 200mL to obtain a 0.25mol / L aluminum chloride hexahydrate solution. Stir magnetically at 30°C and 180rpm until completely dissolved. Continue to drop 200mL of 2mol / L NaOH solution at a rate of 0.5mL / min under magnetic stirring to adjust the alkalinity (B value) to 1mol / L, then mature for 1d, and set the volume to 500mL to obtain a 0.1mol / L PAC solution , that is, the inorganic polymer flocculation solution;

[0088] 2. Preparation of cross-linked organic polymer flocculation solution: ① Dissolve 2 g of chitosan in 1 L of acetic acid solution with a volume fraction of 1%, stir magnetically at 180 rpm for 1 h until completely dissolved, and obtain a ...

specific Embodiment approach 3

[0094]Specific embodiment three: a kind of fermented liquid pretreatment method coupling flocculation adsorption of this embodiment is carried out according to the following steps:

[0095] 1. Preparation of inorganic polymer flocculation solution: Add 12.07g of aluminum chloride hexahydrate into distilled water and set the volume to 200mL to obtain a 0.25mol / L aluminum chloride hexahydrate solution. Stir magnetically at 30°C and 180rpm until completely dissolved. Continue to drop 200mL of 2mol / L NaOH solution at a rate of 0.5mL / min under magnetic stirring to adjust the alkalinity (B value) to 1mol / L, then mature for 1d, and set the volume to 500mL to obtain a 0.1mol / L PAC solution , that is, the inorganic polymer flocculation solution;

[0096] 2. Preparation of cross-linked organic polymer flocculation solution: ① Dissolve 2 g of chitosan in 1 L of acetic acid solution with a volume fraction of 1%, stir magnetically at 180 rpm for 1 h until completely dissolved, and obtain a...

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Abstract

A fermentation broth pretreatment method coupled with flocculation and adsorption. The invention belongs to the field of pretreatment and purification of fermentation broth of bio-based products. The present invention solves the technical problems that the existing flocculation pretreatment technology has low applicability to acid and alkali, small flocs, difficult to filter, a large amount of filter aids need to be added, and some soluble impurities in the fermentation broth cannot be effectively removed, which increases the difficulty of subsequent separation and purification. . Methods: 1. Preparation of inorganic polymer flocculation solution; 2. Preparation of cross-linked organic polymer flocculation solution; 3. Preparation of composite flocculant solution; 4. Flocculation and sedimentation; The preparation technology of an inorganic-organic composite flocculant provided by the present invention introduces active groups such as carboxyl groups, aldehyde groups, and hydroxyl groups through high-efficiency condensation reactions, and generates abundant chain and ring structures through cross-linking modification. After the flocculant is further compounded, the electrification of the flocculant is improved, the flocculation ability is strong, the scum output is small, and the flocs are easy to separate.

Description

technical field [0001] The invention belongs to the field of pretreatment and purification of fermentation liquid of bio-based products; in particular, it relates to a method for pretreatment of fermentation liquid coupled with flocculation and adsorption. Background technique [0002] Microbial fermentation technology is the core of bioengineering. Whether traditional fermentation products such as antibiotics, amino acids, or modern genetic engineering products such as vaccines and human proteins, they all need to be produced through fermentation technology. Fermentation broth pretreatment is the first step in the separation and purification process of fermentation products. By separating cells, bacteria and other suspended particles (cell debris, nucleic acid and protein precipitates) and some soluble impurities (pigments, etc.), the physical properties of the fermentation broth are changed. In order to facilitate the subsequent separation and purification work. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/281C02F1/52C02F1/001
Inventor 咸漠徐超姜龙刘耀杰
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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