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Process for producing acetone and butanol by biomass fermentation and pervaporation membrane coupling

A technology of pervaporation membrane and biomass fermentation, which is applied in the field of biomass fermentation-pervaporation membrane coupling production of acetone butanol, can solve problems such as phase separation of acetone butanol solvent and the like, so as to reduce production cost, save energy and save energy. Water consumption, the effect of reducing the inhibitory effect

Active Publication Date: 2012-11-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But none of these reports involve the application of the phase separation phenomenon of acetone butanol solvent

Method used

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  • Process for producing acetone and butanol by biomass fermentation and pervaporation membrane coupling

Examples

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Embodiment 1

[0022] Example 1 A process for producing acetone butanol by a corn stalk fermentation-pervaporation coupling process

[0023] Corn stalks are treated with steam explosion, acid hydrolysis, and enzyme hydrolysis to make a slurry into the feed tank 1, turn on the feed pump 2 and enter the fermentation tank 3, and ferment at 37°C for 72 hours after being inoculated with microorganisms. When the solvent concentration is detected to reach 18g / L, the feed pump 4 is turned on, and the fermentation liquid is transported into the pervaporation-preferential alcohol-permeable membrane module 5. The pervaporation module is composed of two plate-and-frame pervaporation-preferential alcohol-permeable membrane separators connected in series. The pervaporation membrane used is an organic-inorganic hybrid membrane (PDMS-Silicalite-1). Simultaneously, open vacuum pump 8, vacuum gauge 7 vacuum degree maintains on 500Pa, and permeate is collected by condenser 6, and the total concentration of ace...

Embodiment 2

[0025] Embodiment 2 A kind of technology of corn flour fermentation-pervaporation coupled process to produce acetone butanol

[0026]Prepare the medium with corn flour as raw material, cook and gelatinize at 121°C for 90 minutes to obtain the corn flour medium, enter the feed tank 1, turn on the feed pump 2 and enter the fermenter 3, inoculate the microorganisms and ferment at 37°C for 60 hours, when When the total solvent concentration in the liquid phase in the tank is detected to reach 20g / L, the feed pump 4 is turned on, and the fermentation liquid is transported into the pervaporation preferential alcohol permeation membrane module 5, which is composed of a hollow fiber pervaporation preferential alcohol permeation membrane separator , the selected pervaporation membrane is the inorganic membrane Silicalite-1 or ZSM-5. Simultaneously, open vacuum pump 9, vacuum gauge 8 vacuum degree maintains on 500Pa, and permeate is collected by condenser 6, and the total concentration ...

Embodiment 3

[0027] This example realizes the semi-continuous fermentation of corn flour to produce acetone butanol, which not only greatly reduces the inhibitory effect of the acetone butanol solvent produced by fermentation on microbial cells, but also makes full use of the The phase separation property of high-concentration permeate can effectively reduce the energy consumption of the concentration process, and increase the production intensity of butanol compared with the traditional batch fermentation-distillation process. Example 3 A process for the production of acetone butanol by a continuous fermentation-pervaporation coupling process of corn stalks

[0028] Corn stalks are treated with steam explosion, acid hydrolysis, and enzyme hydrolysis to make a slurry into the feed tank 1, turn on the feed pump 2 and enter the fermentation tank 3, and ferment at 37°C for 20 hours after being inoculated with microorganisms. When the solvent concentration is detected to reach 5g / L, the feed p...

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Abstract

The invention relates to a process for producing acetone and butanol by biomass fermentation and pervaporation membrane coupling, in particular to a production process of coupling a pervaporation membrane and ABE (acetone, butanol and ethanol) fermentation, separating ABE in situ on line and utilizing an extraction tower to obtain an anhydrous solvent. Fermentation liquor in a fermentation tank is pumped out, and is filtered by an ethanol-permselective membrane to obtain a concentrated solution, the concentrated solution is sent into the extraction tower and is separated into an organic phase and a water phase in the extraction tower, after the water phase is pumped into a water phase storage tank, the organic phase does not pass a mash tower but directly enters a butanol tower and follow-up rectifying tower groups to obtain anhydrous butanol, acetone and ethanol, the water phase in the water phase storage tank passes a pervaporation ethanol-permselective membrane assembly, dialysate is pumped into the extraction tower, and the cycle is repeated. According to the process disclosed by the invention, the fermentation process is coupled with the pervaporation technology, the extraction tower is added behind the pervaporation assembly, the inhibitory action of the butanol in the fermentation process is reduced, energy consumption in the separation process is saved, and the competitiveness of a biomass fermentation method for producing the butanol is improved.

Description

Field of Invention [0001] The present invention relates to a process for producing acetone butanol through coupling of biomass fermentation and pervaporation membrane, in particular to a fermentation process of coupling fermentation and pervaporation to produce ABE, separating ABE on-line and in situ, and using pervaporation permeation membrane and extraction tower A process for obtaining anhydrous solvents. Background technique [0002] With the increasing shortage of oil resources in the world, countries all over the world are actively looking for the development and utilization of renewable resources. As an important renewable energy source, biofuel has attracted the attention of various countries. It is estimated that the proportion of biofuel will increase to 30% by 2020, and the total demand will reach 87 billion gallons. [0003] However, at present, butanol is mainly produced by propylene synthesis method, which uses propylene in petroleum as raw material to prepare...

Claims

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Application Information

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IPC IPC(8): C12P7/28C12P7/16C12P7/06C12P7/10B01D61/00B01D3/14C12R1/145
CPCY02E50/17Y02E50/16Y02E50/10
Inventor 万印华李敬陈向荣苏仪齐本坤沈飞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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