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A kind of electrolytic hydrogen bubble tower microbial electrosynthesis reactor and using method thereof

A technology of microbial electrosynthesis and bubble tower, applied in the direction of bioreactor/fermenter combination, stress-stimulated microbial growth method, specific-purpose bioreactor/fermenter, etc., can solve the high current density and high current density of microbial electrosynthesis High coulombic efficiency cannot be achieved at the same time, so as to avoid the loss of bacteria, shorten the start-up time, and increase the biomass

Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an electrolytic hydrogen bubble tower microbial electrosynthesis reactor and its use method to solve the problem that the high current density and high coulombic efficiency of microbial electrosynthesis cannot be achieved at the same time, thereby promoting the actual engineering of microbial electrosynthesis application

Method used

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  • A kind of electrolytic hydrogen bubble tower microbial electrosynthesis reactor and using method thereof
  • A kind of electrolytic hydrogen bubble tower microbial electrosynthesis reactor and using method thereof
  • A kind of electrolytic hydrogen bubble tower microbial electrosynthesis reactor and using method thereof

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Embodiment 1

[0035] The external current is 1000mA, CO 2 The gas inlet rate was 2mL / min, and the pH of the reactor was controlled at around 7. The cathode of the reactor was inoculated with the mixed flora of homoacetogenic bacteria enriched in the laboratory, and the cumulative concentration of acetic acid in the reactor reached 30g / L during the 30d operation period, the average acetogenic rate reached 0.9g / L / d, and the average coulomb The efficiency reaches 70%.

Embodiment 2

[0037] As in the reactor and operating conditions of implementation 1, when the reactor is inoculated with the enriched mixed flora of hydrogenophilic methanogens, the methane production rate of the reactor increases rapidly to 0.35L / L / d within 5 days, and then stabilizes Around this value, the coulombic efficiency of the reactor remains around 65% during the stationary phase.

Embodiment 3

[0039] Such as implementing the reactor and operating conditions of 2, when the operating current of the reactor and the CO 2 When the gas inlet rate increased to 2200mA and 4.4mL / min, the methane production rate of the reactor increased to 0.92L / L / d, and the Coulombic efficiency also increased to 78%.

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Abstract

The invention discloses a microbial electrosynthesis reactor for electrolytic hydrogen gas bubble tower and its use method. The reactor consists of an electrolytic cell at the bottom, a bubble tower at the upper end, and a gas-liquid contact vacuum fiber on the catholyte external circulation system. Composed of membrane modules and pH controllers. The electrolytic cell placed at the bottom of the reactor provides micro-nano hydrogen bubbles for the bubble tower, and the microorganisms suspended in the bubble tower convert hydrogen and CO 2 into corresponding organic compounds. The device of the present invention is suitable for H 2 mediated microbial CO 2 Fixed process, also available for H 2 Driven wastewater microbial nitrogen removal process. Compared with the traditional microbial electrosynthesis system based on the biofilm on the electrode surface, the present invention has the advantages of high electrode current density, high coulombic efficiency, fast reactor start-up time, high production intensity, high system stability and the like. Compared with the traditional gas fermentation reactor based on exogenous hydrogen, the present invention realizes the in-situ supply of micro-nano hydrogen bubbles, and avoids the storage and transportation of hydrogen and the energy consumption of generating micro-nano hydrogen bubbles.

Description

technical field [0001] The invention belongs to the technical fields of biochemical industry and energy environment, and in particular relates to a microbial electrosynthesis reactor of an electrolytic hydrogen bubble tower and a method for using the same. Background technique [0002] Since the Industrial Revolution, human production and life have consumed a large amount of fossil energy and released more and more CO into the atmosphere. 2 , which severely disrupts the natural carbon cycle. Therefore, CO 2 Emission reduction and resource utilization are an urgent task for countries all over the world. In recent years, in order to replace fossil energy, human beings have made rapid progress in the development and utilization of renewable energy (such as wind energy, solar energy, water energy, biomass energy, geothermal energy, ocean energy, etc.). However, due to the characteristics of renewable energy, especially wind energy and solar energy, which have strong interstit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/42C25B15/08C25B11/03C12M1/36C12M1/34C12M1/04C25B9/19
CPCC25B15/08C12M23/02C12M29/06C12M35/02C12M41/36C12M41/26C12M41/28C12M41/40C25B1/04C25B9/73C25B11/031C25B9/19Y02E60/36
Inventor 郭坤
Owner XI AN JIAOTONG UNIV
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