Making Biofuel

• Use plants to make sugars which yeast then breaks down to make ethanol
• Ethanol can be used as a fuel:

  1. Maize is treated with amylase enzyme (starch to glucose)
  2. Add yeast (glucose used in respiration) and make it respire anaerobically
  3. Ethanol that is produced is extracted by distillation
  4. Mixed with gasoline to increase energy and can be used in cars