Method for producing fermentation product

Abstract

The invention discloses a method for producing a fermentation product. The method comprises the following steps of: evaporating fermented mash so as to obtain gas-phase material flow mainly containing the fermentation product and liquid-solid mixture flow mainly containing thalli of a fermentation strain; and separating the thalli of the fermentation strain contained in the liquid-solid mixture flow out and recycling the separated thalli in a fermentation process. The method provided by the invention has the advantages of overcoming the defects of the conventional typical process, recycling most fermentation organisms (such as saccharomycetes) in the fermentation process, reducing the culturing of seed liquor, directly obtaining most fermentation products by evaporating, saving energy consumption and lowering separation cost.

Description

technical field

[0001] The invention relates to the field of biochemical industry, in particular to a process improvement for producing fermented products by fermentation method, especially the improvement of alcohol fermentation process. Background technique

[0002] Due to the depletion of fossil energy and the increasingly serious environmental damage, the development of renewable bioenergy to replace fossil energy has attracted more and more attention from all over the world. Among the developed bioenergy sources, the development of bioethanol has received the most attention, especially the production of ethanol from renewable resources. As we all know, ethanol is produced by the fermentation of sugar, and the available sources of fermentation raw materials are extensive. On the one hand, these raw materials can be obtained from plants containing fermentable sugars, such as sugar cane, sugar beet, sweet sorghum, etc.; The fiber raw material is obtained by hydrolysis. ...

Examples

Embodiment 1

[0039] The pure starch suspension is liquefied and saccharified by an enzymatic method well known in the art, and the obtained sugar solution is purified by an ultrafiltration membrane to obtain a clear sugar solution with a sugar content of 25%. Three fermenters with temperature-controlled heat exchangers were installed in series. The first fermenter has a volume of 45L, the second 30L and the third 15L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, with a flow rate of 10L per hour, the sugar solution with a concentration of 25% is continuously pumped into the first fermenter, and the fermented mash overflows to the second and third fermenter. The temperatures of the three fermenters were all controlled at 36°C (the optimum ethanol-producing temperature for the yeast used). The fermented liquid overflowing from the third fermenter is heated to 42°C by a heat exchanger and enters a three-stage va...

Embodiment 2

[0042] The bagasse is hydrolyzed by cellulase after high-temperature dilute acid pretreatment, and the hydrolyzate is concentrated and filtered through a membrane to obtain a clarified sugar solution with a mass fraction of fermentable sugar of 20%. Three fermenters with temperature-controlled heat exchangers were installed in series, where the first fermenter had a volume of 15 L, the second had a volume of 10 L, and the third had a volume of 5 L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, with a flow rate of 10L per hour, the sugar solution with a concentration of 20% is continuously pumped into the first fermenter, and the fermented mash overflows to the second and third fermenter. The temperatures of the three fermenters were all controlled at 32°C (the optimum ethanol-producing temperature for the yeast used). The fermented liquid overflowing from the third fermenter is heated to 42-43°C b...

Embodiment 3

[0045] The cornstarch is liquefied and saccharified by an enzymatic method well known in the art, and the obtained sugar solution is purified by an ultrafiltration membrane to remove insoluble substances to obtain a clear sugar solution with a sugar mass fraction of 20%. 2 fermenters containing temperature-controlled heat exchangers were installed in series. The volume of each fermenter is 45L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, the sugar solution with a concentration of 20% is continuously pumped into the first fermenter at a flow rate of 10 L per hour, and the fermented mash overflows to the second fermenter. The temperature of both fermentors was controlled at 32°C (the optimum temperature for ethanol production of the yeast used). The fermented liquid overflowing from the second fermenter is heated to 41° C. by a heat exchanger and then enters a secondary vacuum evaporator. The pr...

technical field

[0001] The invention relates to the field of biochemical industry, in particular to a process improvement for producing fermented products by fermentation method, especially the improvement of alcohol fermentation process. Background technique

[0002] Due to the depletion of fossil energy and the increasingly serious environmental damage, the development of renewable bioenergy to replace fossil energy has attracted more and more attention from all over the world. Among the developed bioenergy sources, the development of bioethanol has received the most attention, especially the production of ethanol from renewable resources. As we all know, ethanol is produced by the fermentation of sugar, and the available sources of fermentation raw materials are extensive. On the one hand, these raw materials can be obtained from plants containing fermentable sugars, such as sugar cane, sugar beet, sweet sorghum, etc.; The fiber raw material is obtained by hydrolysis. ...

Examples

Embodiment 1

[0039] The pure starch suspension is liquefied and saccharified by an enzymatic method well known in the art, and the obtained sugar solution is purified by an ultrafiltration membrane to obtain a clear sugar solution with a sugar content of 25%. Three fermenters with temperature-controlled heat exchangers were installed in series. The first fermenter has a volume of 45L, the second 30L and the third 15L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, with a flow rate of 10L per hour, the sugar solution with a concentration of 25% is continuously pumped into the first fermenter, and the fermented mash overflows to the second and third fermenter. The temperatures of the three fermenters were all controlled at 36°C (the optimum ethanol-producing temperature for the yeast used). The fermented liquid overflowing from the third fermenter is heated to 42°C by a heat exchanger and enters a three-stage va...

Embodiment 2

[0042] The bagasse is hydrolyzed by cellulase after high-temperature dilute acid pretreatment, and the hydrolyzate is concentrated and filtered through a membrane to obtain a clarified sugar solution with a mass fraction of fermentable sugar of 20%. Three fermenters with temperature-controlled heat exchangers were installed in series, where the first fermenter had a volume of 15 L, the second had a volume of 10 L, and the third had a volume of 5 L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, with a flow rate of 10L per hour, the sugar solution with a concentration of 20% is continuously pumped into the first fermenter, and the fermented mash overflows to the second and third fermenter. The temperatures of the three fermenters were all controlled at 32°C (the optimum ethanol-producing temperature for the yeast used). The fermented liquid overflowing from the third fermenter is heated to 42-43°C b...

Embodiment 3

[0045] The cornstarch is liquefied and saccharified by an enzymatic method well known in the art, and the obtained sugar solution is purified by an ultrafiltration membrane to remove insoluble substances to obtain a clear sugar solution with a sugar mass fraction of 20%. 2 fermenters containing temperature-controlled heat exchangers were installed in series. The volume of each fermenter is 45L. The first fermenter is filled with sugar solution, inoculated with yeast and allowed to grow. After a certain period of time, the sugar solution with a concentration of 20% is continuously pumped into the first fermenter at a flow rate of 10 L per hour, and the fermented mash overflows to the second fermenter. The temperature of both fermentors was controlled at 32°C (the optimum temperature for ethanol production of the yeast used). The fermented liquid overflowing from the second fermenter is heated to 41° C. by a heat exchanger and then enters a secondary vacuum evaporator. The pr...