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Method for extracting high-viscosity microbial polysaccharide fermentation liquid

A microbial polysaccharide and extraction method technology, applied in the field of biological fermentation and extraction, can solve the problems of difficulty in the filtration process, affect the final packaging, increase product costs, etc., achieve obvious energy saving and consumption reduction, good fluidity of finished products, and increase the effect of contact area

Inactive Publication Date: 2014-09-10
ZIBO SANTIAN CHEM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that ① the high-viscosity polysaccharide fermentation liquid has typical shear dilution characteristics, that is, the viscosity of the contact stirring area is reduced by the shear force, and the solvent is easy to mix, while the fermentation liquid in the area outside the stirring still maintains high viscosity, so Insufficient mixing will result in "passivation" phenomenon, poor dehydration effect, and difficulties in the filtration process.
②The amount of extraction solvent is generally several times the volume of the fermentation broth, the distillation volume is large, the energy consumption is high, and the product cost is increased
③The polysaccharide precipitated by dehydration, after filtering, pressing, and drying, looks like cotton flocs, and there is a lot of dust when crushed, which is not good for the health of the operator. The finished polysaccharide dry powder looks powdery and has no fluidity
④ The dry powder polysaccharide product is light in weight and low in bulk density, which not only affects the finalized packaging, but also produces "fish eyes" when added to water in actual use, which prolongs the dissolution rate and affects the dissolution effect

Method used

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  • Method for extracting high-viscosity microbial polysaccharide fermentation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Pass 50Kg of a microbial polysaccharide fermentation liquid with a viscosity of 7000mPa.s into the pressure storage tank, feed compressed air, adjust the pressure gauge to 0.1MPa, and press the fermentation liquid from the bottom of the pressure storage tank into the extraction tank that has been equipped with 120Kg of 95° ethanol In the spray head in the tank, set the diameter of the spray head to 1.5mm. The surface of the sprayed strip enters the solvent and dehydrates rapidly, and the moisture in the strip is continuously transferred outward. The dehydration of the strip makes the strip harden. The diameter changes from the initial 1.5mm to about 0.3mm. After spraying, the ethanol concentration drops to 58° at the same time, and then the high-speed chopping device is turned on. When the length of the hardened strips dispersed in the solvent is not greater than 10mm, stop chopping and pass through the outlet. Released for filtration. Compared with the traditional extr...

Embodiment 2

[0020] Pass 50Kg of a microbial polysaccharide fermentation liquid with a viscosity of 12000mPa.s into the pressure storage tank, feed compressed air, adjust the pressure gauge to 0.15MPa, and press the fermentation liquid from the bottom of the pressure storage tank into the extractor that has been equipped with 90Kg of 95° ethanol For the spray head in the tank, set the diameter of the spray bar to 2.0mm. After the spray bar is hardened, the diameter will change from the initial 2.0mm to about 0.5mm. After spraying, the ethanol concentration will drop to 62° at the same time, and then turn on High-speed chopping device, when the length of the hardened strips dispersed in the solvent is not more than 10mm, the chopping is stopped, and it is discharged through the outlet for filtration. Compared with the traditional extraction method, 50kg of a microbial polysaccharide fermentation broth with a viscosity of 12000mPa.s needs to add 150kg of extraction solvent three times the amo...

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Abstract

The invention discloses a method for extracting high-viscosity microbial polysaccharide fermentation liquid. The method is characterized by comprising the following steps of: adding an extraction solvent (ethanol, methanol or isopropanol) into an extraction tank; pressing high-viscosity microbial polysaccharide fermented liquid from a pressure tank into an injection head on the top of the extraction tank; injecting the high-viscosity microbial polysaccharide fermented liquid into vertical strip shapes which fall off by using the injection head; mixing the high-viscosity microbial polysaccharide fermented liquid and the extraction solvent in the extraction tank completely to dehydrate to form hard solidified strips; cutting long strips into small short strips by laterally mounting two groups of high-speed rotating knives; and then discharging through a discharging valve at the bottom of the extraction tank and filtering. The invention adopts the method opposite to the prior art, with the sequence of adding the solvent and then mixing the high-viscosity microbial polysaccharide fermented liquid, so the 'passivation' phenomenon is avoided, the using amount of the solvent is greatly saved, extraction efficiency is improved, and cost is saved.

Description

technical field [0001] The invention relates to a method for extracting polysaccharides from microbial polysaccharide fermentation liquid, which belongs to the technical field of biological fermentation extraction, in particular to a method for extracting high-viscosity microbial polysaccharide fermentation liquid. Background technique [0002] Microbial polysaccharide is a high molecular polymer produced by microorganisms through fermentation with carbohydrates as the main raw material. Usually, the fermentation liquid has a high viscosity and is a viscous jelly with a water content of more than 90%. content is lower. At present, the current extraction method is as follows: pump the high-viscosity microbial polysaccharide fermentation liquid into an extraction tank with a certain volume and a stirring device, start stirring, then slowly add a high-concentration alcohol solvent into the extraction tank, and perform forced pump circulation , when the amount of alcohol solven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00
Inventor 吉武科
Owner ZIBO SANTIAN CHEM EQUIP CO LTD