Ethanol

A method for manufacturing ethanol, comprising:

• a step of converting a carbon source into a synthetic gas comprising carbon monoxide and hydrogen;
• a microbial fermentation step of supplying the synthetic gas comprising carbon monoxide and hydrogen to a microbial fermentation tank to obtain an ethanol-containing liquid by microbial fermentation;
• a separation step of separating the ethanol-containing liquid into a liquid or solid component containing microorganisms and a gas component containing ethanol;
• a liquefaction step of condensing and liquefying the gas component;
• a purification step of purifying ethanol from the liquid obtained in the liquefaction step;
• wherein the purified ethanol comprises at least one inorganic component selected from the group consisting of:
• silicon having a content of 10 mg/L or more and 100 mg/L or less;
• chromium having a content of 0.6 mg/L or less;
• iron having a content of 2.0 mg/L or less;
• sodium having a content of 150 mg/L or more and 1000 mg/L or less;
• and
• potassium having a content of 1.0 mg/L or more and 10 mg/L or less, and/or at least one organic component selected from the group consisting of:
• aliphatic hydrocarbon having a content of 0.16 mg/L or more and 10 mg/L or less;
• aromatic hydrocarbon having a content of 0.4 mg/L or more and 10 mg/L or less;
• and
• dialkyl ether having a content of 0.1 mg/L or more and 100 mg/L or less.