Bubble-free air supply and solid-liquid separation integrated membrane biomembrane reactor taking indissoluble gases as fermentation raw materials

Abstract

The invention provides a bubble-free air supply and solid-liquid separation integrated membrane biomembrane reactor comprising a gas distribution pipe, a hollow bubble-free air supply fiber membrane module, a water distribution pipe and a solid-liquid separation membrane module which are arranged in a tank body of the reactor, wherein the top ends of the hollow bubble-free air supply fiber membrane module and the solid-liquid separation membrane module are lower than the liquid level in the tank body; the hollow bubble-free air supply fiber membrane module is communicated with a feed gas storage tank through the gas distribution pipe, the water distribution pipe is communicated with a culture medium storage tank through a feeding pump, and the solid-liquid separation membrane module is communicated with a liquid product outlet through a sorption pump; the tank body is also provided with a circulating water outlet, a gas product outlet, a feed supplement hole, a thermometer, a pH meter and a pressure gage; and partial pressure of gas in the cavity of a hollow fiber membrane is lower than the pressure of a bubble point so as to ensure that the hollow bubble-free air supply fiber membrane module realizes bubble-free air supply. The reactor has higher fermentation reaction rate and product concentration, and can enhance economic feasibility of fermentation of synthesis gas and other indissoluble gases, thereby being suitable for a biological fermentation process taking various indissoluble gases as raw materials.

Description

technical field [0001] The invention relates to the field of biotechnology, more specifically, the invention relates to a bubble-free gas supply-solid-liquid separation integrated membrane biofilm reactor using insoluble gas as a fermentation raw material. technical background [0002] Insoluble gases refer to gases with low solubility in water, such as carbon monoxide (CO) and hydrogen (H 2 ). In the following, the fermentation of insoluble gases will be introduced by taking syngas fermentation and carbon monoxide fermentation to produce hydrogen as examples. About syngas (mainly CO, H 2 and CO 2 ) has been studied for more than 10 years to produce ethanol, acetic acid, butanol, butyric acid and other chemicals or liquid fuels, and carbon monoxide fermentation to produce hydrogen. The biochemical reactions are shown in formula (1-9). [0003] 6CO+3H 2 O→CH 3 CH 2 OH+4CO 2 (1) [0004] 2CO 2 +6H 2 →CH 3 CH 2 OH+3H 2 O (2) [0005] 4CO+2H 2...

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to overcome the deficiencies in the existing insoluble gas fermentation technology, i.e. lower gas-liquid mass transfer rate, lower gas utilization efficiency and lower microbial cell concentration, to provide a non-bubble gas supply-solid Liquid separation integrated membrane biofilm reactor to improve the fermentation reaction rate of insoluble gas as raw material, laying the foundation for the commercial application of syngas fermentation and even other insoluble gas fermentation

Images