System for fermenting synthesis gas to produce alcohol and processing method thereof

A synthesis gas and alcohol technology, applied in the field of fermentation engineering, can solve the problems of low concentration of fermentation products and high concentration of alcohol, and achieve the effect of avoiding losses and improving gas utilization efficiency

Inactive Publication Date: 2017-05-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Aiming at the problems in the prior art that the concentration of alcohols in the fermentation liquid is too high and the concentration of fermentation products is too low, the present invention provides a system and a treatment method for producing alcohols by fermenting syngas

Method used

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  • System for fermenting synthesis gas to produce alcohol and processing method thereof
  • System for fermenting synthesis gas to produce alcohol and processing method thereof

Examples

Experimental program
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Embodiment 1

[0088] As shown in 1, this embodiment provides a system for fermenting syngas to produce alcohols. The system includes a bubble-free gas supply membrane module 1, a bioreactor 2 and a pervaporation membrane module 3, wherein the bubble-free gas supply membrane Module 1 is placed in bioreactor 2, the air inlet of bubble-free gas supply membrane module 1 is connected to syngas, the fermentation broth outlet of bioreactor 2 is connected to the feed port of pervaporation membrane module 3, and the pervaporation membrane module 3 The retentate outlet of the bioreactor 2 is connected with the material inlet of the bioreactor 2.

[0089] Wherein, the bubble-free air-supply membrane module 1 is placed below the liquid level of the fermentation liquid in the bioreactor 2, and is in direct contact with the fermentation liquid in the bioreactor 2; the bubble-free air-supply membrane module 1 is set individually, and the air is fed at both ends;

[0090] The gas partial pressure in the bu...

Embodiment 2

[0099] This embodiment provides a system for fermenting synthesis gas to produce alcohols. The system described in Embodiment 1 is the same as that in Embodiment 1 except that the pore size of the hollow polypropylene hollow fiber membrane is 0.8 μm. The system structure is the same.

[0100] The processing method of the system is:

[0101] (1) Place 7.5L of sterile ATCC1745PETC medium after seed cultivation in bioreactor 2 with a liquid volume of 5.0L. Before inoculation, use N 2 Aeration for 3 hours will contain CO, H 2 , CO 2 and N 2 Syngas (volume concentration: CO20%, H 2 5%, CO 2 15% and N 2 60%) was aerated for 3 hours by the bubble-free air supply membrane module 1 at an aeration rate of 0.05 L / min, and entered into the bioreactor 2 for fermentation treatment, the fermentation temperature was 30°C, the pH of the fermentation treatment was 6.0, and the inoculum size was 10 %, the pressure in the bioreactor 2 is 1 atmosphere, fermented for 10 days, no candy is ...

Embodiment 3

[0121] Such as figure 2 As shown, this embodiment provides a system for fermenting syngas to produce alcohols. The system includes a bubble-free gas supply membrane module 1, a bioreactor 2 and a pervaporation membrane module 3, wherein the bubble-free gas supply membrane module 1 Placed outside the bioreactor 2, the air inlet of the bubble-free gas supply membrane module 1 is connected to the synthesis gas, the outlet of the fermentation broth of the bioreactor 2 is connected to the feed port of the pervaporation membrane module 3, and the interception of the pervaporation membrane module 3 The liquid outlet is connected with the material inlet of the bioreactor 2.

[0122] Wherein, the fermentation liquid in the bioreactor 2 is connected to the liquid inlet of the bubble-free gas supply membrane module 1 through a delivery pump, and the liquid outlet of the bubble-free gas supply membrane module 1 is connected to the feed port of the bioreactor 2 .

[0123] The gas partial...

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Abstract

The invention provides a system for fermenting synthesis gas to produce alcohol and processing method thereof. The system comprises a bubble-free gas supply membrane component, a bioreactor and a pervaporation membrane component, wherein the bubble-free gas supply membrane component is placed in or out of the bioreactor, the gas inlet of the bubble-free gas supply membrane component is connected with the synthesis gas; a fermentation liquor outlet of the bioreactor is connected with a feed port of the pervaporation membrane component, a trapped liquor outlet of the pervaporation membrane component is connected with a material inlet of the bioreactor. The system and method provided by the invention improve the gas liquor transmission efficiency, the gas utilization efficiency, the microorganism cell concentration and the product concentration in a mixed gas fermentation process by use of the bubble-free gas supply membrane technology in double-end or single-end gas inlet, and in combination with a fermentation technology in fermentation-pervaporation separation coupling; the material consumption of cell culture is lowered, the cell concentration in the fermentation process is improved, the fermentation efficiency and the product concentration are improved.

Description

technical field [0001] The invention belongs to the technical field of fermentation engineering, and in particular relates to a system for fermenting synthesis gas to produce alcohols and a processing method thereof. Background technique [0002] Syngas is a kind of CO, CO 2 and H 2 The mixed gas as the main component mainly comes from energy-intensive industries such as synthetic ammonia industry, petroleum refining industry, steel mills, and wood pulp and paper mills. my country's annual industrial emissions exceed 6 million tons of CO and 4 million tons of H 2 . In recent years, the comprehensive utilization of syngas by biological methods has attracted great attention, especially the technology of converting syngas into ethanol and butanol through microbial anaerobic fermentation. However, the slow fermentation reaction rate and low product concentration limit the commercial operation of this technology. There are three main reasons for the slower reaction rate and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/04C12M1/00C12P7/06C12P7/16
CPCC12M21/12C12M29/04C12M29/16C12M43/02C12P7/065C12P7/16Y02E50/10
Inventor 万印华曹伟锋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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