120 liter Research biogas digester

This is a 120 liter biogas digester filled with 36 kilogram of cow dung (from the rumen of cow) and 54 liters of water. I stocked it today. I am going to keep monitoring it till the gas produced becomes flammable. I need advice on what to add to make it start burning fast. When should I start adding food waste and at what rate? In my previous digester, I put in cow dung and poultry droppings, today is its 19th day and its still not burning (although alot of gas has been produced). What can I do?

Finished building:  Friday, 21 April, 2017


  • fixed body without gas storage


  • Home

Functional state: 

  • in progress

DIY or Commercial: 

  • DIY
Size:  120Liter