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In Italy, at Sutri

In Italy, at Sutri (in the region of Lazio) there is the only zoo technique firm that produces electric energy through “a biogas system”.  
Mr Bruni's firm has got a breeding of 310 Frisona race cows whose defections, through a fermentative activity, produce mainly methane. The gas goes to power up an electricity – generating group for the  electric energy. 
OPEN QUESTIONS
  1. Which condition allows cows to produce milk ?
  2. What is the peculiarity of the Frisona cows ?
  3. Which main gas is being produced during the fermentative activity ?
  4. What is the percentage of the gas produced ?
  5. Which other gases are being obtained ?
  6. How long does the mixture take to get to the second digester ?
  7. What is the difference between the gas produced in the first digester and in the second digester ?
  8. Do you know any other kinds of biomass ?
  9. Which kind of biomass produces gases? Name at least  one of them and what  its usage is.
  10. What are the conditions favouring the fermentative process?
Download the questions file
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