Method for producing bioethanol and device for producing bioethanol

A method for producing bioethanol, which is a method for producing bioethanol from cellulose, the method comprising:

• in order,
• a saccharification step of adding an enzyme to the cellulose for saccharification to obtain a sugar liquid;
• a step of obtaining a concentrated sugar liquid by concentrating the obtained sugar liquid;
• a fermentation step of adding yeast to the concentrated sugar liquid for fermentation to obtain hydrous bioethanol;
• and
• a concentration step of concentrating the hydrous bioethanol to obtain bioethanol, wherein
• in the step of obtaining the concentrated sugar liquid, the sugar liquid is concentrated using a protein-supported polyamide RO membrane.

A device for producing bioethanol, which is a device for producing bioethanol from cellulose, the device comprising:

• a saccharification tank configured to allow an enzyme to be added to the cellulose for saccharification to obtain a sugar liquid;
• a sugar liquid tank configured to allow a concentrated sugar liquid obtained by concentrating the obtained sugar liquid to be supplied;
• a fermentation tank configured to allow yeast to be added to the concentrated sugar liquid for fermentation to obtain hydrous bioethanol;
• and
• a bioethanol tank configured to allow bioethanol obtained by concentrating the hydrous bioethanol to be supplied, wherein
• at least one of a ceramic membrane for separating the enzyme that is provided between the sugar liquid tank and the fermentation tank and a ceramic membrane for separating unreacted yeast that is provided between the fermentation tank and the bioethanol tank is further provided.

A device for producing bioethanol, which is a device for producing bioethanol from cellulose, the device comprising:

• a saccharification tank configured to allow an enzyme to be added to the cellulose for saccharification to obtain a sugar liquid;
• a sugar liquid tank configured to allow a concentrated sugar liquid obtained by concentrating the obtained sugar liquid to be supplied;
• a fermentation tank configured to allow yeast to be added to the concentrated sugar liquid for fermentation to obtain hydrous bioethanol;
• and
• a bioethanol tank configured to allow bioethanol obtained by concentrating the hydrous bioethanol to be supplied, wherein
• a protein-supported polyamide RO membrane for concentrating the sugar liquid is provided between the sugar liquid tank and the fermentation tank.