handy farmer wrote:thanks for the idea Marcos, are you talking ordinary yard grass? so the cow eats some for the grass and poops, i cut some of the grass and jam it it in the digester, along with some of the cow poop; bobs your crazy uncle, and you have lots of methane right?? is the cow poop just to get some good bacteria to start the process?
Please note that this is not my area of expertise, but yes I'm talking ordinary yard grass. However, some strains are better than others. The cow poop is good for innoculation and also as a feed stock. There are many grass digesters in operation today making methane fuel gas (including the cows themselves).