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System for preparing butanol and its application

A butanol and fermenter technology, which is applied in the field of butanol preparation system, can solve the problems of fermentation system, low butanol recovery rate, environmental pollution, etc., to reduce the possibility of bacterial contamination and recover butanol The effect of high efficiency and low environmental pollution

Active Publication Date: 2019-06-28
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of nitrogen stripping also has shortcomings: incomplete condensation results in low recovery of butanol, a small amount of ABE in the stripping tail gas causes environmental pollution, and high energy consumption.
[0004] Therefore, the fermentation system coupled with the gas stripping process needs to be improved

Method used

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  • System for preparing butanol and its application
  • System for preparing butanol and its application
  • System for preparing butanol and its application

Examples

Experimental program
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Effect test

preparation example Construction

[0046] According to the system for preparing butanol according to the embodiment of the present invention, symbiotic bacteria are used for fermentation to produce butanol under non-strict anaerobic conditions, and the self-produced gas of the fermentation generates bubbles in the fermentation liquid through a gas distributor, and the bubbles intercept butanol, and then It is condensed and recovered in the condenser, and the condensed self-produced gas is re-introduced into the gas distributor through the gas circulation pump for recycling, so as to realize the self-produced gas cycle stripping, and the self-gas is used for stripping, the condensation effect is good, and the gas tail gas is avoided The generation of ABE in the middle, the environmental pollution is little. At the same time, the structure of the system is simple, and the fermenter is also an air stripping tank, so that the butanol production and butanol extraction process are carried out in the same bioreactor, a...

Embodiment 1

[0071] In this example, butanol was produced by gas stripping by using batch fermentation coupled with batch cycle self-produced gas, and the butanol-producing bacteria were cultivated and fermented according to the general method for producing butanol. When the butanol concentration in the fermenter is close to 7g / L, start the gas circulation pump and the low-temperature circulating water bath, and the condensation temperature is -5°C. The gas produced by the butanol-producing symbiotic bacteria system during the fermentation process turns into bubbles and enters through the gas distributor. In the fermenter, as a stripping gas. Air stripping treatment adopts intermittent air stripping method. Start gas stripping when the butanol concentration in the fermentation broth is greater than 7g / L, and stop the gas stripping when the butanol concentration in the fermentation broth is lower than 6g / L. The gas flow rate is 1-4vvm. The results are shown in Table 1.

Embodiment 2

[0073] In this example, butanol was prepared by gas stripping by fed-batch fermentation coupled with batch cycle self-produced gas, and the butanol-producing bacteria were cultivated and fermented according to the general method for preparing butanol. When the butanol concentration in the fermenter is close to 7g / L, start the gas circulation pump and the low-temperature circulating water bath, and the condensation temperature is -5°C. The gas produced by the butanol-producing symbiotic bacteria system during the fermentation process turns into bubbles and enters through the gas distributor. In the fermenter, as a stripping gas. The air stripping method adopts the intermittent air stripping method. Start gas stripping when the butanol concentration in the fermentation broth is greater than 7g / L, and stop the gas stripping when the butanol concentration in the fermentation broth is lower than 6g / L. The gas flow rate is 1-4vvm. When the glucose concentration is close to 10g / L, ...

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Abstract

The invention discloses a preparing butanol system and an application of preparing butanol system, wherein the preparing butanol system and the application of preparing butanol system comprise a fermentation tank, a gas distributor, a gas circulating pump, a condenser, a collector, and a cooler. The fermentation tank is provided with a supplementing feed liquid inlet, a gas inlet and a gas outlet. Symbiotic strains of butanol are produced inside the fermentation tank by fermentation. The gas distributor is arranged inside the fermentation tank. The gas circulating pump is provided with a gas input end and a gas output end. The gas output end is connected with the gas distributor through the gas inlet. The condenser is provided with a condensate gas inlet and a condensate gas outlet. The condensate gas outlet is connected with the gas output end. A gas inlet and an exhaust port are arranged a collector. The gas inlet is connected with the gas outlet. The exhaust port is arranged with the condensate gas inlet. The cooler is arranged at lower end of the collector. The preparing butanol system and the application of preparing butanol system can produce butanol by utilizing the symbiotic strains of butanol under un-strict anaerobic conditions. The preparing butanol system and the application of preparing butanol system have the advantages of simple structure, high butanol recovery rate, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the field of fermentation, in particular to a system for preparing butanol and a method for preparing butanol using the aforementioned system for preparing butanol. Background technique [0002] Product inhibition is an urgent technical problem that needs to be solved in the research of bio-butanol preparation. In the traditional fermentation process, the concentration of butanol is generally lower than 13g / L. Product inhibition causes the concentration and production intensity of butanol in the fermentation broth to be very low, making The energy cost of downstream separation and purification is extremely high, which seriously affects the economics of bio-butanol. The in-situ integration of separation technology into ABE (Acetone-butanol-ethanol) fermentation can relieve product inhibition, increase butanol production intensity, improve butanol production and substrate utilization, and reduce subsequent separation costs. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/34C12M1/04C12P7/16
CPCC12M29/06C12M29/24C12M41/00C12P7/16Y02E50/10Y02P20/10Y02P20/59
Inventor 张建安程可可林樟楠周玉杰严翔吴晶刘宏娟王根宇
Owner TSINGHUA UNIV
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