fermentation

• Fermentation…

  produces aqueous solutions of ethanol

  uses sugar/glucose → a renewable resource.

  requires a temp. of 30-40

  ↳ temp. too low - the yeast becomes inactive → the rate of reaction slows down.

      temp. too high - the yeast is denatured → stops working.
• reaction = sugar → ethanol + carbon dioxide
• PROCESS:

  1. Extract sugar (glucose) from crops
  2. Add yeast to glucose (enzymes in yeast act as a catalyst)
• ADVANTAGES:

  Easy to make

  Relatively cheap

  Resources are easy to access

  Low temp. = less energy required 
• DISADVANTAGES:

  Can affect biodiversity

  Batch process → slower 

  Atom ecomony → not 100%

  Will need many workers and much land. (labour cost)