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Method for producing fatty acid and device used therein

A fatty acid and anaerobic microorganism technology, applied in the field of microbial fermentation, can solve the problems of low microbial activity, high reactor operating cost, low utilization rate of synthesis gas, etc., and achieve the effects of reducing loss and improving mass transfer efficiency.

Inactive Publication Date: 2013-08-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems such as the low syngas-reactor liquid phase mass transfer efficiency, low syngas utilization rate, low microbial activity and high reactor operating cost in the prior art, the purpose of the present invention is to provide a method for producing fatty acids

Method used

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  • Method for producing fatty acid and device used therein

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Embodiment 1

[0033] Embodiment 1 utilizes the device of biomass fermentation to produce fatty acid

[0034] Such as figure 1 As shown, the present invention provides a kind of device of fatty acid production, comprises: the reactor 1 that hollow fiber membrane 10 is housed, and the synthetic gas supply device 2 that communicates with this reactor respectively, culture medium supply device 3, reactant reclaims The device 4 is a device 5 for measuring the pH value of the reaction system in the reactor; wherein, the reactor 1 is provided with an air inlet 11 and an air outlet 12 .

[0035] Wherein, the synthesis gas supply device 2 is provided with a pressure stabilizing valve 21 for controlling the pressure of the synthesis gas, and the device 2 is connected to the air inlet 11 ; the medium supply device 3 is provided with an inlet pump 31 .

[0036] In order to allow anaerobic microorganisms to better attach to the hollow fiber membranes and enhance the transfer between substances, the dev...

Embodiment 2

[0040] Example 2 Under neutral pH value and intermittent operation mode, a new method for producing fatty acid by indirect fermentation of biomass using mixed flora of hollow fiber membrane reactor.

[0041] The device used adopts the device in embodiment 1, such as figure 1 shown. In this embodiment, the hollow fiber membrane reactor 1 is made of organic glass. The shell has an inner diameter of 3.5cm and a height of 30cm. 1cm, 2cm, 14cm, 20cm, and 25cm from the lower end are respectively provided with 3 connection ports of the medium supply device, 6 water inlets of the reaction system circulation system, 13 sampling ports, 6 circulation ports of the reaction system circulation system and 4 connections of the reactant recovery device mouth. The hollow fiber membrane bundle 10 is made up of 30 polyethylene hollow fiber membranes. The effective length of the membranes is 22cm, the inner diameter is 1mm, and the outer diameter is 1.1mm. The air port 11 runs through. The sy...

Embodiment 3

[0044] Example 3 Under acidic pH value and continuous flow operation mode, a new method for the production of fatty acids by indirect fermentation of biomass using mixed flora in hollow fiber membrane reactors.

[0045] The device used adopts the device in embodiment 1, such as figure 1 shown. In this embodiment, the hollow fiber membrane reactor 1 is made of organic glass. The shell has an inner diameter of 3.5cm and a height of 30cm. 1cm, 2cm, 14cm, 20cm, and 25cm from the lower end are respectively provided with 3 connection ports of the medium supply device, 6 water inlets of the reaction system circulation system, 13 sampling ports, 6 circulation ports of the reaction system circulation system and 4 connections of the reactant recovery device mouth. The hollow fiber membrane bundle 10 is made up of 30 polyethylene hollow fiber membranes. The effective length of the membranes is 22cm, the inner diameter is 1mm, and the outer diameter is 1.1mm. The air port 11 runs thro...

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Abstract

The invention provides a method for producing fatty acid. The method comprises the following steps of: thermally cracking and gasifying biomass to generate synthesis gas; and then providing a hollow fiber membrane as an attaching vector and in-situ gas supplying device and adopting the synthesis gas as a raw material to produce the fatty acid in an anaerobic fermentation manner. The invention also provides a device for producing the fatty acid. According to the method and device, the hollow fiber membrane is adopted and used as an attaching medium of microorganism, thus microorganism loss can be reduced; hollow fiber membrane silks are adopted and used for providing the synthesis gas in situ, thus, the mass transfer efficiency of the synthesis gas diffusing to the microorganism, as well as the utilization rate of the synthesis gas, can be improved. By adopting a reactor system and the method, enriched microorganism utilizing the synthesis gas can be gained within a shorter time, and thus the fatty acid, in particular medium-and long-chain fatty acid such as caproic acid and caprylic acid, can be produced.

Description

technical field [0001] The invention relates to the technical field of microbial fermentation, in particular to a method for producing fatty acid and a used device. Background technique [0002] Energy is one of the important foundations for maintaining human life and promoting social and economic development. With the depletion of fossil energy and human concern on global environmental issues, the use of renewable energy to replace fossil energy is a current focus of attention and research. Biomass synthesized through photosynthesis is the only renewable resource that can replace fossil energy. For example: At present, the available biomass in my country has reached 20.9 billion tons, which is equivalent to 580 million tons of standard coal. Biomass utilization methods include: chemical methods and biological methods. One of the main chemical methods for biomass utilization is to first gasify it by thermochemical methods to produce syngas (including CO, H 2 and CO 2 et...

Claims

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Application Information

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IPC IPC(8): C12P7/52C12P7/40C12P7/64C12M1/36C12R1/145
Inventor 曾建雄张放张岩陈曼褚培娜丁静申晓菲
Owner UNIV OF SCI & TECH OF CHINA
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