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Concentration method for sugar liquid in cellulose alcoholic fermentation

A technology of cellulosic ethanol and sugar liquid, which is applied in fermentation, pervaporation, biofuel and other directions to achieve the effect of reducing operating cost, compact equipment and short concentration time

Inactive Publication Date: 2008-09-24
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report that can be used for the concentration of sugar liquid in cellulosic ethanol fermentation.

Method used

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  • Concentration method for sugar liquid in cellulose alcoholic fermentation
  • Concentration method for sugar liquid in cellulose alcoholic fermentation
  • Concentration method for sugar liquid in cellulose alcoholic fermentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, a method for concentrating sugar liquid in cellulose ethanol fermentation, the following steps are carried out successively:

[0024] 1), membrane filtration (this is prior art):

[0025] The hydrolyzed sugar solution (concentration less than 2%) is filtered through a membrane to remove suspended particles.

[0026] 2), membrane distillation concentration:

[0027] Devices used such as figure 1 As shown, it selects a single hydrophobic membrane module, and uses vacuum operation to realize the concentration of sugar solution, so all connections of the whole device must be kept sealed and connected.

[0028] Place the sugar solution after removing suspended particles in the feed liquid tank 1 with heating device, and the feed liquid tank 1 heats the sugar liquid to 50°C; under the action of the feed liquid pump 2, the sugar liquid passes through the control valve 3 and enters Feed pipe 41 is delivered to hydrophobic membrane assembly 4 (that is feed pipe ...

Embodiment 2

[0033] Embodiment 2, a method for concentrating sugar liquid in cellulose ethanol fermentation, the following steps are carried out successively:

[0034] 1), membrane filtration: with embodiment 1.

[0035] 2), membrane distillation concentration:

[0036] The feed liquid tank 1 heats the sugar solution to 70°C; the hydrophobic membrane module 4 can be a plate-and-frame module, and a hydrophobic microporous membrane made of polypropylene is selected. The pore diameter of the membrane is 0.1 μm, and the membrane area is about 0.2m 2 . Use the vacuum pump 7 to keep the vacuum on the right side of the membrane at 0.090Mpa, and the flux of the microporous membrane is about 4.5L / m at this time 2 h.

[0037] Embodiment 1 of the remaining contents.

[0038] The monosaccharide concentration in the finally obtained sugar solution reaches 20%. The concentration of monosaccharides in the water permeated from the microporous membrane is less than 0.01%.

Embodiment 3

[0039] Embodiment 3, a method for concentrating sugar liquid in cellulose ethanol fermentation, the following steps are carried out successively:

[0040] 1), membrane filtration: with embodiment 1.

[0041] 2), membrane distillation concentration:

[0042] Devices used such as figure 2 As shown, it selects a single hydrophobic membrane module and realizes the concentration of sugar solution by direct contact operation.

[0043] Place the sugar solution after removing suspended particles in the feed liquid tank 1 with heating device, and the feed liquid tank 1 heats the sugar liquid to 50°C; under the action of the feed liquid pump 2, the sugar liquid passes through the control valve 3 and enters The feed pipe 41 is transported to the hydrophobic membrane module 4 (that is, the feed pipe 41 communicates with the lower end on the left side of the hydrophobic membrane module 4, and the sugar solution enters the left side of the microporous membrane) for direct contact membran...

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Abstract

The invention discloses a concentration method of sugar solution in ethanol fermentation of cellulose. Firstly the sugar solution which is removed of suspended particles is obtained via membrane filtration, then membrane distillation technology is adopted, i.e. the sugar solution of temperature of 40 to 70 DEG C is introduced from one side of a hydrophobic membrane module, then the water in the sugar solution penetrates through the wall of microporous membrane on the hydrophobic membrane module in the vapor status, diffuses into the other side and condensates, thereby realizing the concentration of the sugar solution. Adopting the method of the invention to concentrate the sugar solution in the ethanol fermentation of cellulose has the advantages of the good concentration effect and the low energy consumption.

Description

technical field [0001] The invention relates to a method for producing cellulose ethanol, in particular to a membrane distillation concentration method for sugar solution in cellulose ethanol fermentation, which is suitable for the production of cellulose ethanol. Background technique [0002] As a non-renewable natural mineral resource, global oil exploitation has entered the mid-term. The high price of oil since 2004 has shown that the increase in supply cannot keep up with the increase in demand. Although there are many types of renewable energy in the world, there are very few that can replace petroleum as power fuel. Biofuels are currently the only bulk renewable energy that has entered the market and can replace petroleum fuels. Therefore, bio-alcohol (ethanol) as a gasoline additive is the first good thing to replace petroleum. [0003] Responding to the call of the state and always implementing the strategic policy of sustainable development, it proposes to use cel...

Claims

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Application Information

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IPC IPC(8): C12P7/10B01D61/36
CPCY02E50/16Y02E50/10
Inventor 陈欢林张红漫张林黄和杨华剑
Owner CHINA PETROLEUM & CHEM CORP
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