Circulating separation coupled system for continuous bacterial fermentation

Abstract

The invention provides a circulating separation coupled system for continuous bacterial fermentation. The system can maintain a certain concentration of high-activity bacteria in a continuous fermentation system to realize continuous and stable fermentation; meanwhile, a protein separation and concentration system is coupled and can prepare bacterial protein; and a bacterium-containing mash can also be prevented from directly entering a distillation work section to block a tower plate, and meanwhile, the problem that bacteria are broken and difficult to separate and concentrate after distillation treatment of the bacterium-containing mash can be effectively solved. The circulating separation coupled system for bacteria fully considers the problem of recovery of ethanol from a bacterium-containing mash part, and no ethanol loss is caused basically.

Description

technical field [0001] The invention belongs to the field of fermentation and separation, and in particular relates to a continuous fermentation cell cycle separation coupling system. Background technique [0002] The production of ethanol by gas fermentation is a new technology that uses carbon monoxide as the carbon source to produce ethanol through continuous bacterial fermentation. The ethanol-containing mash produced by fermentation needs to be sent to the rectification and dehydration system for separation and purification. Continuous fermentation is carried out using CO gas as the only carbon source. During the fermentation process, highly active bacteria need to be intercepted to maintain a stable concentration of bacteria in the fermentation system and to continuously produce high ethanol. Since CO is the only carbon source, it is necessary to maintain the gas holdup and reduce the existence of buffer as much as possible during the interception and return process of...

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Problems solved by technology

[0004] The invention provides a continuous fermentation cell cycle separation coupling system, which solves the problems in the prior art that the ethanol-containing mash is directly transported to the distillation section, and the bacteria and cell fragments in the mash are likely to cause blockage of the tray and limit the distillation temperature.

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