Fermentation liquor pretreatment method 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: 2020-10-20
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 som

Method used

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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

The invention discloses a fermentation liquor pretreatment method coupled with flocculation and adsorption, belongs to the field of pretreatment and purification of bio-based product fermentation liquor, and aims at solving the technical problems that an existing flocculation pretreatment technology is low in acid-base applicability, the floc is small and difficult to filter, a large amount of filter aids needs to be added, part of soluble impurities in fermentation liquor cannot be effectively removed, and the subsequent separation and purification difficulty is increased. The method comprises the following steps: 1, preparing an inorganic polymer flocculation solution; 2, preparing a cross-linked organic polymer flocculation solution; 3, preparing a composite flocculant solution; 4, carrying out flocculation and coagulation; 5, performing activated carbon adsorption; and 6, carrying out solid-liquid separation. According to the provided inorganic-organic composite flocculant preparation technology, through an efficient condensation reaction, carboxyl, an aldehyde group, hydroxyl and other active groups are introduced, rich chain-shaped and cyclic structures are generated throughcrosslinking modification, the electrification condition of the flocculant is improved after the flocculant is further compounded with an inorganic flocculant, the flocculation capacity is high, the scum yield is low, and 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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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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